首页 > 最新文献

Rangeland Ecology & Management最新文献

英文 中文
Uninsured Pastoralists - Adoption and Attitudes towards Index-Based Livestock Insurance in Four Kenyan Counties 没有保险的牧民——肯尼亚四个县对基于指数的牲畜保险的采用和态度
IF 2.4 3区 环境科学与生态学 Q2 ECOLOGY Pub Date : 2025-11-01 Epub Date: 2025-09-17 DOI: 10.1016/j.rama.2025.08.005
Göran Bostedt , Per Knutsson , Deborah Muricho , Stephen Mureithi , Ewa Wredle
Index-based livestock insurance (IBLI) is promoted as a proactive measure to protect against climate-related risks. Despite initial efforts to introduce the insurance, its adoption has generally been low in most developing countries. This paper compares adopters and nonadopters of IBLI in four arid or semi-arid counties in Kenya, focusing specifically on household demographics, climate effects, land tenure arrangements, and the interaction between other coping strategies and the decision to adopt livestock insurance. The household survey was conducted in 12 counties, whereby 491 respondents were interviewed, of which about 4.5% had insurance. The results showed that IBLI adoption was influenced by the socioeconomic, environmental, and existing adoption strategies. Lack of awareness was the most common reason (44.2% of respondents) for not adopting insurance, showing the need for simplifying information, because the respondents with more schooling were likely to purchase insurance. High precipitation reduced the need for livestock insurance due to low drought risk. Active fodder management positively influenced insurance uptake, likely due to the use of the indemnity for investment in other adaptive strategies. Otherwise, pastoralists were more likely to purchase insurance if they had to travel a long distance to the alternative grazing grounds. Likewise, insurance premiums limited insurance uptake due to the imperfect correlation between drought and indemnity payments (basis risk). Generally, insurance alone is not a panacea for pastoralists. Presently, they seem to be too expensive compared to the value they provide. Either the prediction accuracy of IBLIs must be increased, or premiums more heavily subsidized, for insurance to be a genuine alternative for pastoralists.
基于指数的牲畜保险(IBLI)作为防范气候相关风险的一项积极措施得到推广。尽管最初努力引入这种保险,但在大多数发展中国家,它的采用率普遍较低。本文比较了肯尼亚四个干旱或半干旱县采用IBLI和未采用IBLI的情况,特别关注家庭人口统计、气候影响、土地权属安排以及其他应对策略与采用牲畜保险决策之间的相互作用。住户调查在12个县进行,共采访了491名受访者,其中约4.5%的人有保险。结果表明,社会经济、环境和现有的采用策略对IBLI的采用有影响。缺乏意识是不投保的最常见原因(44.2%的受访者),表明需要简化信息,因为受教育程度较高的受访者更有可能购买保险。由于干旱风险低,高降水减少了对牲畜保险的需求。积极饲料管理积极影响保险吸收,可能是由于使用补偿投资于其他适应性策略。否则,如果牧民不得不长途跋涉到另一个牧场,他们更有可能购买保险。同样,由于干旱和赔款(基本风险)之间的不完全相关性,保险费限制了保险的吸收。一般来说,保险本身并不是牧民的灵丹妙药。目前,与它们提供的价值相比,它们似乎太贵了。要么必须提高ibli的预测准确性,要么必须加大对保费的补贴,这样保险才能真正成为牧民的选择。
{"title":"Uninsured Pastoralists - Adoption and Attitudes towards Index-Based Livestock Insurance in Four Kenyan Counties","authors":"Göran Bostedt ,&nbsp;Per Knutsson ,&nbsp;Deborah Muricho ,&nbsp;Stephen Mureithi ,&nbsp;Ewa Wredle","doi":"10.1016/j.rama.2025.08.005","DOIUrl":"10.1016/j.rama.2025.08.005","url":null,"abstract":"<div><div>Index-based livestock insurance (IBLI) is promoted as a proactive measure to protect against climate-related risks. Despite initial efforts to introduce the insurance, its adoption has generally been low in most developing countries. This paper compares adopters and nonadopters of IBLI in four arid or semi-arid counties in Kenya, focusing specifically on household demographics, climate effects, land tenure arrangements, and the interaction between other coping strategies and the decision to adopt livestock insurance. The household survey was conducted in 12 counties, whereby 491 respondents were interviewed, of which about 4.5% had insurance. The results showed that IBLI adoption was influenced by the socioeconomic, environmental, and existing adoption strategies. Lack of awareness was the most common reason (44.2% of respondents) for not adopting insurance, showing the need for simplifying information, because the respondents with more schooling were likely to purchase insurance. High precipitation reduced the need for livestock insurance due to low drought risk. Active fodder management positively influenced insurance uptake, likely due to the use of the indemnity for investment in other adaptive strategies. Otherwise, pastoralists were more likely to purchase insurance if they had to travel a long distance to the alternative grazing grounds. Likewise, insurance premiums limited insurance uptake due to the imperfect correlation between drought and indemnity payments (basis risk). Generally, insurance alone is not a panacea for pastoralists. Presently, they seem to be too expensive compared to the value they provide. Either the prediction accuracy of IBLIs must be increased, or premiums more heavily subsidized, for insurance to be a genuine alternative for pastoralists.</div></div>","PeriodicalId":49634,"journal":{"name":"Rangeland Ecology & Management","volume":"103 ","pages":"Pages 153-162"},"PeriodicalIF":2.4,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145095841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Can Seminatural Grassland Vegetation in Abandoned Fields Support the Nutritional Requirements of Grazing Goats? A Study in Central Japan 废弃地半天然草地植被能否满足放牧山羊的营养需求?日本中部的一项研究
IF 2.4 3区 环境科学与生态学 Q2 ECOLOGY Pub Date : 2025-11-01 Epub Date: 2025-08-21 DOI: 10.1016/j.rama.2025.07.011
Noriaki Nakajima , Kazuya Doi , Sae Tamiya , Masato Yayota
The nutritional value of wild plants varies greatly, and some species have nutritional values and digestibility comparable to those of commonly cultivated grass varieties. Thus, we hypothesized that foraging on seminatural grassland vegetation in abandoned fields could fulfill nutritional requirements for goat maintenance, and selective foraging could ensure greater availability of these nutrients, contributing to the maintenance of livestock and their growth. This study aimed to evaluate the nutritional value of semi-natural grassland vegetation in abandoned fields with selective foraging by goats and to estimate whether the vegetation in abandoned fields can satisfy the nutritional requirements of goats through the seasons. We used 16 goats to conduct grazing trials throughout the seasons in two experimental areas of an abandoned field. The variations in the chemical components of each plant group were also evaluated for each season. The nutritional composition of the goat ingesta was estimated from the number of bites of the ingested plant species, chemical components, and bite mass. The goats grazed on 33–43 plant species across the seasons, and the plants that the goats foraged changed throughout the seasons. Goats shifted their foraging from forbs to multiple other plant categories (bamboo species and the Poaceae and Cyperaceae families), increasing their intake of crude protein (CP) and minerals. Grazing under seminatural grassland vegetation in such fields allowed goats to meet their nutritional requirements of CP, calcium, magnesium, phosphorus, potassium, iron, cobalt, manganese, zinc, and chlorine and support a daily gain (DG) of 100 g throughout the season. In contrast, grazing in seminatural grassland vegetation caused excess Fe intake and deficiencies in selenium and copper. However, this study suggests that goats grazing under seminatural grassland vegetation in abandoned Japanese fields could support the nutritional requirements for a DG of 100 g in terms of CP and several minerals.
野生植物的营养价值差异很大,有些品种的营养价值和消化率与普通栽培的牧草品种相当。因此,我们假设在废弃地的半天然草地植被上觅食可以满足山羊维持的营养需求,并且选择性觅食可以确保这些营养物质的更大可用性,有助于维持牲畜的生长和生长。本研究旨在评价山羊选择性采食撂荒地半天然草地植被的营养价值,评估撂荒地植被是否能满足山羊的四季营养需求。我们用16只山羊在一块废弃田地的两个试验区进行了整个季节的放牧试验。还对各植物组化学成分在不同季节的变化进行了评价。根据所食植物种类的咬数、化学成分和咬质量来估计山羊食入物的营养成分。山羊在不同季节以33 ~ 43种植物为食,山羊觅食的植物种类随季节变化而变化。山羊的取食从牧草转向多种其他植物类别(竹类、禾本科和苏科),增加了其粗蛋白质(CP)和矿物质的摄入量。在这些草场的半天然草地植被下放牧,山羊可以满足CP、钙、镁、磷、钾、铁、钴、锰、锌和氯的营养需求,并在整个季节维持100克的日增重(DG)。半天然草地植被放牧导致铁摄入过量,硒和铜缺乏。然而,本研究表明,在日本撂撂地半天然草地植被下放牧的山羊在CP和几种矿物质方面可以满足100 g DG的营养需求。
{"title":"Can Seminatural Grassland Vegetation in Abandoned Fields Support the Nutritional Requirements of Grazing Goats? A Study in Central Japan","authors":"Noriaki Nakajima ,&nbsp;Kazuya Doi ,&nbsp;Sae Tamiya ,&nbsp;Masato Yayota","doi":"10.1016/j.rama.2025.07.011","DOIUrl":"10.1016/j.rama.2025.07.011","url":null,"abstract":"<div><div>The nutritional value of wild plants varies greatly, and some species have nutritional values and digestibility comparable to those of commonly cultivated grass varieties. Thus, we hypothesized that foraging on seminatural grassland vegetation in abandoned fields could fulfill nutritional requirements for goat maintenance, and selective foraging could ensure greater availability of these nutrients, contributing to the maintenance of livestock and their growth. This study aimed to evaluate the nutritional value of semi-natural grassland vegetation in abandoned fields with selective foraging by goats and to estimate whether the vegetation in abandoned fields can satisfy the nutritional requirements of goats through the seasons. We used 16 goats to conduct grazing trials throughout the seasons in two experimental areas of an abandoned field. The variations in the chemical components of each plant group were also evaluated for each season. The nutritional composition of the goat ingesta was estimated from the number of bites of the ingested plant species, chemical components, and bite mass. The goats grazed on 33–43 plant species across the seasons, and the plants that the goats foraged changed throughout the seasons. Goats shifted their foraging from forbs to multiple other plant categories (bamboo species and the Poaceae and Cyperaceae families), increasing their intake of crude protein (CP) and minerals. Grazing under seminatural grassland vegetation in such fields allowed goats to meet their nutritional requirements of CP, calcium, magnesium, phosphorus, potassium, iron, cobalt, manganese, zinc, and chlorine and support a daily gain (DG) of 100 g throughout the season. In contrast, grazing in seminatural grassland vegetation caused excess Fe intake and deficiencies in selenium and copper. However, this study suggests that goats grazing under seminatural grassland vegetation in abandoned Japanese fields could support the nutritional requirements for a DG of 100 g in terms of CP and several minerals.</div></div>","PeriodicalId":49634,"journal":{"name":"Rangeland Ecology & Management","volume":"103 ","pages":"Pages 83-92"},"PeriodicalIF":2.4,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144879691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Economic Assessment of Virtual Fencing Technology in Dairy Systems: A Model Study in Temperate Climates 虚拟围栏技术在奶牛系统中的经济评价:温带气候下的模型研究
IF 2.4 3区 环境科学与生态学 Q2 ECOLOGY Pub Date : 2025-11-01 Epub Date: 2025-11-04 DOI: 10.1016/j.rama.2025.09.014
Anna Kiefer , Johannes Isselstein , Enno Bahrs
Recent developments in Europe indicate a continuous decline in pasture-based dairy farming, despite its recognized advantages in grassland regions, including reduced food–feed competition, lower feed costs, and enhanced animal welfare. The management of large herds across extensive grazing areas typically requires precise and labor-intensive fencing operations using electrical physical fences (EPFs), which depend on fixed or semi-mobile infrastructure—such as wires, posts, and energizers—to allocate fresh pastures according to animals’ nutritional demands. Virtual fencing (VF) represents an emerging technological alternative that utilizes GPS-enabled collars and software-based geofencing to regulate livestock movement without physical barriers. This approach offers the potential to reduce labor requirements and increase flexibility in pasture management. However, the economic and technical disparities between EPF and VF systems necessitate an assessment of farm-specific conditions under which VF can serve as a feasible substitute. This study investigated the economic and managerial determinants influencing the adoption of VF systems in temperate dairy production. The findings demonstrate that the economic performance of VF is highly dependent on farm size, pasture management strategy, and the extent of necessary operational adaptations. While VF can considerably reduce labor input, its economic viability remains limited by substantial initial investment and adaptation costs unless management practices are specifically optimized. Profitability increases with a higher proportion of grazed herbage in livestock diets. The integration of VF with complementary digital technologies could further enhance its efficiency and practical applicability. Moreover, targeted policy measures–such as those within the Common Agricultural Policy (CAP, 2023–2027)—and investments in research, training, and advisory services may foster wider adoption. Recognizing and compensating the ecosystem services facilitated by VF could further strengthen its economic sustainability. Nevertheless, integration into agri-environmental schemes requires further clarification of legal, ethical, and technical standards to ensure compliance with animal welfare and data governance frameworks.
欧洲最近的发展表明,尽管牧场奶牛养殖在草原地区具有公认的优势,包括减少食品饲料竞争、降低饲料成本和提高动物福利,但其持续下降。在广阔的牧区管理大型畜群通常需要使用电气物理围栏(epf)进行精确和劳动密集型的围栏操作,这依赖于固定或半移动的基础设施,如电线、柱子和电源,根据动物的营养需求分配新鲜的牧场。虚拟围栏(VF)是一种新兴的技术替代方案,它利用具有gps功能的项圈和基于软件的地理围栏,在没有物理障碍的情况下调节牲畜的运动。这种方法提供了减少劳动力需求和增加牧场管理灵活性的潜力。但是,紧急方案基金和野生动物基金系统之间的经济和技术差异需要评估野生动物基金作为可行替代品的具体农场条件。本研究调查了影响在温带乳制品生产中采用VF系统的经济和管理因素。研究结果表明,VF的经济效益高度依赖于农场规模、牧场管理策略和必要的经营适应程度。虽然VF可以大大减少劳动力投入,但其经济可行性仍然受到大量初始投资和适应成本的限制,除非管理实践得到特别优化。牲畜日粮中牧草的比例越高,盈利能力越高。将VF与互补的数字技术相结合,可以进一步提高其效率和实用性。此外,有针对性的政策措施——例如共同农业政策(CAP, 2023-2027)——以及对研究、培训和咨询服务的投资可能会促进更广泛的采用。承认和补偿森林生态系统服务可以进一步加强森林的经济可持续性。然而,融入农业环境计划需要进一步澄清法律、道德和技术标准,以确保符合动物福利和数据治理框架。
{"title":"Economic Assessment of Virtual Fencing Technology in Dairy Systems: A Model Study in Temperate Climates","authors":"Anna Kiefer ,&nbsp;Johannes Isselstein ,&nbsp;Enno Bahrs","doi":"10.1016/j.rama.2025.09.014","DOIUrl":"10.1016/j.rama.2025.09.014","url":null,"abstract":"<div><div>Recent developments in Europe indicate a continuous decline in pasture-based dairy farming, despite its recognized advantages in grassland regions, including reduced food–feed competition, lower feed costs, and enhanced animal welfare. The management of large herds across extensive grazing areas typically requires precise and labor-intensive fencing operations using electrical physical fences (EPFs), which depend on fixed or semi-mobile infrastructure—such as wires, posts, and energizers—to allocate fresh pastures according to animals’ nutritional demands. Virtual fencing (VF) represents an emerging technological alternative that utilizes GPS-enabled collars and software-based geofencing to regulate livestock movement without physical barriers. This approach offers the potential to reduce labor requirements and increase flexibility in pasture management. However, the economic and technical disparities between EPF and VF systems necessitate an assessment of farm-specific conditions under which VF can serve as a feasible substitute. This study investigated the economic and managerial determinants influencing the adoption of VF systems in temperate dairy production. The findings demonstrate that the economic performance of VF is highly dependent on farm size, pasture management strategy, and the extent of necessary operational adaptations. While VF can considerably reduce labor input, its economic viability remains limited by substantial initial investment and adaptation costs unless management practices are specifically optimized. Profitability increases with a higher proportion of grazed herbage in livestock diets. The integration of VF with complementary digital technologies could further enhance its efficiency and practical applicability. Moreover, targeted policy measures–such as those within the Common Agricultural Policy (CAP, 2023–2027)—and investments in research, training, and advisory services may foster wider adoption. Recognizing and compensating the ecosystem services facilitated by VF could further strengthen its economic sustainability. Nevertheless, integration into agri-environmental schemes requires further clarification of legal, ethical, and technical standards to ensure compliance with animal welfare and data governance frameworks.</div></div>","PeriodicalId":49634,"journal":{"name":"Rangeland Ecology & Management","volume":"103 ","pages":"Pages 417-430"},"PeriodicalIF":2.4,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145465560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ecological Poverty Reduction Path Analysis of Herdsmen’s Rangeland Transfer 牧民牧场流转的生态扶贫路径分析
IF 2.4 3区 环境科学与生态学 Q2 ECOLOGY Pub Date : 2025-11-01 Epub Date: 2025-08-14 DOI: 10.1016/j.rama.2025.07.004
XianDong Li , Lingfei Zhang , Yujia Deng , Yujie Chen , Rong Kong
Against the backdrop of increasing contradictions between economic development and ecological protection in pastoral areas, issues such as rangeland fragmentation and ecological degradation have gradually emerged. These issues severely restrict the modernization process of rangeland animal husbandry. Based on field survey data from 427 pastoral households in Inner Mongolia and Xinjiang pastoral areas, this paper constructs a theoretical framework of “rangeland transfer - rangeland pressure - rangeland ecology - herdsmen’s income.” It employs multiple linear regression and mediation effect models to explore the influence mechanism of rangeland transfer on pastoral income. It also examines the mediating role of rangeland pressure and the moderating effect of ecological degradation. The study finds that rangeland transfer can effectively increase pastoral households’ income. For those who rent-in rangeland, the effect of boosting pastoral income is more prominent. Those who rent-out rangeland achieve nonpastoral income growth through labor transfer. Rangeland pressure fully mediates the positive effect of rangeland transfer on herdsmen’s household income. However, the negative moderating effect of ecological changes on this mediation is obscured. Further analysis shows that the majority of herdsmen transfer rangeland based on kinship, geographical proximity, or policy guidance. Herders rarely get paid by users for ecologically degraded rangelands because of family relationships or a lack of legal knowledge. Concurrently, the absence of government oversight lowers the price of contract violations, resulting in a phenomenon where rangeland degradation still increases income. The research reveals the dynamic mechanism of ecological and economic interaction in rangeland pastoral areas. It proposes establishing an intelligent monitoring system and strengthening regulatory enforcement. These measures aim to promote the optimal allocation of rangeland resources and sustainable development in pastoral areas.
在牧区经济发展与生态保护矛盾日益突出的背景下,草原破碎化、生态退化等问题逐渐显现。这些问题严重制约了草原畜牧业的现代化进程。本文以内蒙古和新疆牧区427户牧民的实地调查数据为基础,构建了“牧场转移-牧场压力-牧场生态-牧民收入”的理论框架。运用多元线性回归和中介效应模型,探讨了草地流转对牧民收入的影响机制。本文还探讨了牧地压力的中介作用和生态退化的调节作用。研究发现,牧地流转能有效提高牧户收入。对于以牧场为租用地的农户来说,提高牧区收入的效果更为突出。牧场出租者通过劳动力转移实现了非牧区收入的增长。牧场压力充分中介了牧场流转对牧民家庭收入的正向影响。然而,生态变化对这一中介的负调节作用并不明显。进一步分析表明,牧民转移牧场的主要原因是亲属关系、地理邻近或政策引导。由于家庭关系或缺乏法律知识,牧民很少从生态退化的牧场获得报酬。同时,政府监管的缺失降低了违反合同的代价,导致牧场退化仍然增加收入的现象。研究揭示了草地牧区生态与经济相互作用的动力机制。建议建立智能监控系统,加强监管执法。这些措施旨在促进牧区草地资源的优化配置和可持续发展。
{"title":"Ecological Poverty Reduction Path Analysis of Herdsmen’s Rangeland Transfer","authors":"XianDong Li ,&nbsp;Lingfei Zhang ,&nbsp;Yujia Deng ,&nbsp;Yujie Chen ,&nbsp;Rong Kong","doi":"10.1016/j.rama.2025.07.004","DOIUrl":"10.1016/j.rama.2025.07.004","url":null,"abstract":"<div><div>Against the backdrop of increasing contradictions between economic development and ecological protection in pastoral areas, issues such as rangeland fragmentation and ecological degradation have gradually emerged. These issues severely restrict the modernization process of rangeland animal husbandry. Based on field survey data from 427 pastoral households in Inner Mongolia and Xinjiang pastoral areas, this paper constructs a theoretical framework of “rangeland transfer - rangeland pressure - rangeland ecology - herdsmen’s income.” It employs multiple linear regression and mediation effect models to explore the influence mechanism of rangeland transfer on pastoral income. It also examines the mediating role of rangeland pressure and the moderating effect of ecological degradation. The study finds that rangeland transfer can effectively increase pastoral households’ income. For those who rent-in rangeland, the effect of boosting pastoral income is more prominent. Those who rent-out rangeland achieve nonpastoral income growth through labor transfer. Rangeland pressure fully mediates the positive effect of rangeland transfer on herdsmen’s household income. However, the negative moderating effect of ecological changes on this mediation is obscured. Further analysis shows that the majority of herdsmen transfer rangeland based on kinship, geographical proximity, or policy guidance. Herders rarely get paid by users for ecologically degraded rangelands because of family relationships or a lack of legal knowledge. Concurrently, the absence of government oversight lowers the price of contract violations, resulting in a phenomenon where rangeland degradation still increases income. The research reveals the dynamic mechanism of ecological and economic interaction in rangeland pastoral areas. It proposes establishing an intelligent monitoring system and strengthening regulatory enforcement. These measures aim to promote the optimal allocation of rangeland resources and sustainable development in pastoral areas.</div></div>","PeriodicalId":49634,"journal":{"name":"Rangeland Ecology & Management","volume":"103 ","pages":"Pages 61-70"},"PeriodicalIF":2.4,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144841991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Does Drought Intensify the Effects of Black-Tailed Prairie Dogs on Livestock Production and Net Revenue in Semiarid Rangelands? 干旱是否加剧了半干旱草原黑尾土拨鼠对牲畜生产和净收入的影响?
IF 2.4 3区 环境科学与生态学 Q2 ECOLOGY Pub Date : 2025-11-01 Epub Date: 2024-05-31 DOI: 10.1016/j.rama.2024.04.011
David J. Augustine , John P. Ritten , David L. Hoover , Justin D. Derner
In the western Great Plains, black-tailed prairie dogs are well known to have substantial effects on the quantity and nutritional quality of grassland vegetation. However, the degree to which this affects livestock production has been challenging to quantify due to high temporal variability in precipitation and forage growth rates, as well as substantial variation in prairie dog populations induced by periodic disease outbreaks. Here, we examine the effects of black-tailed prairie dogs on the productivity and economic returns of yearling steers grazing semiarid rangeland of eastern Colorado during a series of years that included above-average precipitation and severe drought. We evaluated the degree to which drought suppresses livestock weight gains in the presence versus absence of prairie dogs, as well as how this effect varied by soil type (low vs. high productivity). Black-tailed prairie dogs significantly reduced livestock weight gain (kg steer−1 cm precipitation−1) on high productivity soils in the 2 drought yr (−23% in 2020; −38% in 2022), but not in a wet or average precipitation yr. Cattle from two pastures with prairie dogs were destocked earlier in the drought of 2022 (due to more severe forage shortages) than cattle from remaining pastures, which negatively affected net economic returns more than it did weight gain, resulting in a significant negative effect of prairie dogs on net revenue (−27%) across all soil types during severe drought. Net economic returns were more similar across soil types in wet years but were reduced by 41% and 25% on low- compared with high-productivity soils in the 2 drought yr. Coexistence of prairie dogs with livestock production may increasingly depend on spatially explicit management that seeks to minimize control costs and focus prairie dog conservation on soil types where impacts to livestock production are also minimized.
众所周知,在西部大平原地区,黑尾土拨鼠对草原植被的数量和营养质量有重要影响。然而,这对牲畜生产的影响程度很难量化,因为降水和饲料增长率的时间变化很大,而且周期性疾病爆发导致草原土拨鼠种群的变化很大。在这里,我们研究了在降水高于平均水平和严重干旱的一系列年份中,黑尾草原土拨鼠对在科罗拉多州东部半干旱牧场放牧的一岁阉牛的生产力和经济回报的影响。我们评估了干旱在草原土拨鼠存在与不存在的情况下对牲畜体重增加的抑制程度,以及这种影响如何因土壤类型(低生产力与高生产力)而变化。在2个干旱年,黑尾土拨鼠显著降低了高产土壤上牲畜的增重(kg阉牛−1 cm降水−1)(2020年为−23%;在2022年的干旱中(由于更严重的饲料短缺),来自两个草原犬鼠牧场的牛比其他牧场的牛更早地减少了库存,这对净经济回报的负面影响大于体重增加,导致在严重干旱期间,草原犬鼠对所有土壤类型的净收入产生了显著的负面影响(- 27%)。在湿润年份,不同土壤类型的净经济回报更为相似,但在2个干旱年份,与高产土壤相比,低生产力土壤的净经济回报分别减少了41%和25%。土拨鼠与畜牧生产的共存可能越来越依赖于空间明确的管理,这种管理旨在最大限度地降低控制成本,并将土拨鼠保护的重点放在对畜牧生产影响最小的土壤类型上。
{"title":"Does Drought Intensify the Effects of Black-Tailed Prairie Dogs on Livestock Production and Net Revenue in Semiarid Rangelands?","authors":"David J. Augustine ,&nbsp;John P. Ritten ,&nbsp;David L. Hoover ,&nbsp;Justin D. Derner","doi":"10.1016/j.rama.2024.04.011","DOIUrl":"10.1016/j.rama.2024.04.011","url":null,"abstract":"<div><div><span><span>In the western Great Plains, black-tailed prairie dogs<span><span><span> are well known to have substantial effects on the quantity and nutritional quality of grassland vegetation. However, the degree to which this affects livestock production has been challenging to quantify due to high temporal variability in precipitation and forage growth rates, as well as substantial variation in prairie dog populations induced by periodic disease outbreaks. Here, we examine the effects of black-tailed prairie dogs on the productivity and economic returns of </span>yearling steers grazing semiarid </span>rangeland of eastern Colorado during a series of years that included above-average precipitation and severe drought. We evaluated the degree to which drought suppresses livestock </span></span>weight gains in the presence versus absence of prairie dogs, as well as how this effect varied by soil type (low vs. high productivity). Black-tailed prairie dogs significantly reduced livestock weight gain (kg steer</span><sup>−1</sup> cm precipitation<sup>−1</sup><span>) on high productivity soils in the 2 drought yr (−23% in 2020; −38% in 2022), but not in a wet or average precipitation yr. Cattle from two pastures with prairie dogs were destocked earlier in the drought of 2022 (due to more severe forage shortages) than cattle from remaining pastures, which negatively affected net economic returns more than it did weight gain, resulting in a significant negative effect of prairie dogs on net revenue (−27%) across all soil types during severe drought. Net economic returns were more similar across soil types in wet years but were reduced by 41% and 25% on low- compared with high-productivity soils in the 2 drought yr. Coexistence of prairie dogs with livestock production may increasingly depend on spatially explicit management that seeks to minimize control costs and focus prairie dog conservation on soil types where impacts to livestock production are also minimized.</span></div></div>","PeriodicalId":49634,"journal":{"name":"Rangeland Ecology & Management","volume":"103 ","pages":"Pages 554-562"},"PeriodicalIF":2.4,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145790000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Current and Future Redcedar Encroachment: Potential Implications for Central Nebraska Landscapes 当前和未来红杉入侵:对内布拉斯加州中部景观的潜在影响
IF 2.4 3区 环境科学与生态学 Q2 ECOLOGY Pub Date : 2025-11-01 Epub Date: 2025-09-25 DOI: 10.1016/j.rama.2025.08.011
Nawaraj Shrestha , Aaron R. Mittelstet , Yi Qi , Daniel R. Uden
Woody plant encroachment is one of the primary threats to the grasslands of the North American Great Plains. Woody plant encroachment not only reduces biodiversity but also alters ecosystem services, such as groundwater recharge and livestock forage production, which are vital to the socio-economy of the region. In this study, we used machine learning, Markov chains, and cellular automata modeling to map the current and future cover of eastern redcedar (Juniperus virginiana). Eastern redcedar, a native species to the United States, is a dominant woody evergreen species in landscapes of the Central Great Plains. We used a multilayer perceptron to classify Landsat image archives (2000, 2010, and 2020) with training samples generated from the classification of high-resolution National Agriculture Imagery Program images. A sampling-based approach was used to estimate the encroachment rate between 2000 and 2020. We used transition probabilities between 2000 and 2010 to represent four different encroachment scenarios and predicted redcedar encroachment using transition potentials for the years 2020, 2050, and 2100. Results from image classification indicated that redcedar increased annually by 0.34–3.31% in 2000–2010, 3.88–4.15% in 2010–2020, and 2.10–3.73% in 2000–2020. The most encroachment occurred in counties with high proportions of loess canyons and hills. Redcedar’s distribution, predicted using Markov chains and cellular automata modeling, increased by > two-fold (3 999 km2) in 2050 and four-fold (7 226 km2) in 2100 compared with an area of 2 006 km2 in 2020. Our results demonstrate that despite differences in transition probabilities and accompanying rates of spread, redcedar is likely to continue spreading at the expense of grassland ecosystems. Redcedar encroachment scenarios with various encroachment patterns can be used to guide proactive conservation, inform decision-making, and provide inputs for biophysical models to simulate the effects of encroachment on various ecosystem services in the absence of large-scale management success.
木本植物的入侵是北美大平原草原的主要威胁之一。木本植物的入侵不仅减少了生物多样性,而且改变了对该地区社会经济至关重要的生态系统服务,如地下水补给和牲畜饲料生产。在这项研究中,我们使用机器学习、马尔可夫链和元胞自动机建模来绘制东部红杉(Juniperus virginia)当前和未来的覆盖范围。东部红杉是美国本土树种,是中部大平原地区的常绿木本树种。我们使用多层感知器对Landsat图像档案(2000年、2010年和2020年)进行分类,并使用高分辨率国家农业图像计划图像分类生成的训练样本。采用基于抽样的方法估算了2000 - 2020年的侵蚀率。我们使用2000 - 2010年的过渡概率来代表四种不同的入侵情景,并使用过渡潜力来预测2020年、2050年和2100年的红杉入侵。图像分类结果表明,2000-2010年红杉年增长率为0.34 ~ 3.31%,2010-2020年为3.88 ~ 4.15%,2000-2020年为2.10 ~ 3.73%。黄土丘陵和峡谷占比高的县域受到的侵蚀最大。利用马尔可夫链和元胞自动力模型预测,红杉的分布在2050年增加了2倍(3 999 km2), 2100年增加了4倍(7 226 km2),而2020年的面积为2 006 km2。我们的研究结果表明,尽管在过渡概率和伴随的蔓延率方面存在差异,红杉可能会以牺牲草原生态系统为代价继续蔓延。具有不同入侵模式的红杉入侵情景可用于指导主动保护,为决策提供信息,并为生物物理模型提供输入,以模拟在缺乏大规模管理成功的情况下入侵对各种生态系统服务的影响。
{"title":"Current and Future Redcedar Encroachment: Potential Implications for Central Nebraska Landscapes","authors":"Nawaraj Shrestha ,&nbsp;Aaron R. Mittelstet ,&nbsp;Yi Qi ,&nbsp;Daniel R. Uden","doi":"10.1016/j.rama.2025.08.011","DOIUrl":"10.1016/j.rama.2025.08.011","url":null,"abstract":"<div><div>Woody plant encroachment is one of the primary threats to the grasslands of the North American Great Plains. Woody plant encroachment not only reduces biodiversity but also alters ecosystem services, such as groundwater recharge and livestock forage production, which are vital to the socio-economy of the region. In this study, we used machine learning, Markov chains, and cellular automata modeling to map the current and future cover of eastern redcedar (<em>Juniperus virginiana</em>). Eastern redcedar, a native species to the United States, is a dominant woody evergreen species in landscapes of the Central Great Plains. We used a multilayer perceptron to classify Landsat image archives (2000, 2010, and 2020) with training samples generated from the classification of high-resolution National Agriculture Imagery Program images. A sampling-based approach was used to estimate the encroachment rate between 2000 and 2020. We used transition probabilities between 2000 and 2010 to represent four different encroachment scenarios and predicted redcedar encroachment using transition potentials for the years 2020, 2050, and 2100. Results from image classification indicated that redcedar increased annually by 0.34–3.31% in 2000–2010, 3.88–4.15% in 2010–2020, and 2.10–3.73% in 2000–2020. The most encroachment occurred in counties with high proportions of loess canyons and hills. Redcedar’s distribution, predicted using Markov chains and cellular automata modeling, increased by &gt; two-fold (3 999 km<sup>2</sup>) in 2050 and four-fold (7 226 km<sup>2</sup>) in 2100 compared with an area of 2 006 km<sup>2</sup> in 2020. Our results demonstrate that despite differences in transition probabilities and accompanying rates of spread, redcedar is likely to continue spreading at the expense of grassland ecosystems. Redcedar encroachment scenarios with various encroachment patterns can be used to guide proactive conservation, inform decision-making, and provide inputs for biophysical models to simulate the effects of encroachment on various ecosystem services in the absence of large-scale management success.</div></div>","PeriodicalId":49634,"journal":{"name":"Rangeland Ecology & Management","volume":"103 ","pages":"Pages 258-269"},"PeriodicalIF":2.4,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145157536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Resource Selection by Sheep and Goats in Queensland Australia 澳大利亚昆士兰绵羊和山羊的资源选择
IF 2.4 3区 环境科学与生态学 Q2 ECOLOGY Pub Date : 2025-11-01 Epub Date: 2025-09-29 DOI: 10.1016/j.rama.2025.08.014
Caroline Wade , Mark Trotter , Caitriana Steele , Lara Prihodko , Derek W. Bailey
Abiotic and biotic factors influence sheep and goat landscape distribution. Resource selection functions allow us to determine which factors influence distribution the most. This study tested distance to water, distance to trees, tree count, wind direction, and vegetation metrics as resources influencing the distribution of sheep and goats on extensive pastures in Queensland, Australia. Vegetation metrics were computed from remotely sensed data, and are measured as green vegetation, nongreen vegetation, bare ground, and total standing dry matter. We found the location of water, trees, and the prevailing wind direction were the most influential factors affecting sheep and goat distribution. Both sheep and goats selected for areas close to water, trees, and in the direction of the prevailing wind. At one site, goats showed a preference for green vegetation mainly in treed areas, while sheep showed a preference for nongreen vegetation which in the drought conditions of this study were found in less treed areas and can be interpreted as a selection for herbaceous material. At the other sites, the influence of water, trees, and wind was too strong to see a direct influence of vegetation on resource selection. Further research in nondrought conditions would help to better explain vegetation influence on sheep and goat landscape utilization.
非生物和生物因素影响着绵羊和山羊的景观分布。资源选择函数使我们能够确定哪些因素对分布影响最大。本研究测试了与水的距离、与树的距离、树木数量、风向和植被指标作为影响澳大利亚昆士兰州广阔牧场绵羊和山羊分布的资源。植被指标是根据遥感数据计算的,包括绿色植被、非绿色植被、裸地和总直立干物质。水的位置、树木的位置和盛行风向是影响绵羊和山羊分布的主要因素。绵羊和山羊都选择靠近水、树木和盛行风方向的地方。在一个地点,山羊表现出对绿色植被的偏好,主要是在树木繁茂的地区,而绵羊则表现出对非绿色植被的偏好,而非绿色植被在本研究的干旱条件下出现在树木较少的地区,可以解释为对草本物质的选择。在其他地点,水、树木和风的影响太大,看不到植被对资源选择的直接影响。在非干旱条件下的进一步研究将有助于更好地解释植被对绵羊和山羊景观利用的影响。
{"title":"Resource Selection by Sheep and Goats in Queensland Australia","authors":"Caroline Wade ,&nbsp;Mark Trotter ,&nbsp;Caitriana Steele ,&nbsp;Lara Prihodko ,&nbsp;Derek W. Bailey","doi":"10.1016/j.rama.2025.08.014","DOIUrl":"10.1016/j.rama.2025.08.014","url":null,"abstract":"<div><div>Abiotic and biotic factors influence sheep and goat landscape distribution. Resource selection functions allow us to determine which factors influence distribution the most. This study tested distance to water, distance to trees, tree count, wind direction, and vegetation metrics as resources influencing the distribution of sheep and goats on extensive pastures in Queensland, Australia. Vegetation metrics were computed from remotely sensed data, and are measured as green vegetation, nongreen vegetation, bare ground, and total standing dry matter. We found the location of water, trees, and the prevailing wind direction were the most influential factors affecting sheep and goat distribution. Both sheep and goats selected for areas close to water, trees, and in the direction of the prevailing wind. At one site, goats showed a preference for green vegetation mainly in treed areas, while sheep showed a preference for nongreen vegetation which in the drought conditions of this study were found in less treed areas and can be interpreted as a selection for herbaceous material. At the other sites, the influence of water, trees, and wind was too strong to see a direct influence of vegetation on resource selection. Further research in nondrought conditions would help to better explain vegetation influence on sheep and goat landscape utilization.</div></div>","PeriodicalId":49634,"journal":{"name":"Rangeland Ecology & Management","volume":"103 ","pages":"Pages 270-280"},"PeriodicalIF":2.4,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145220196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Long-Term Legacy of Juniper Encroachment: Increased Infiltration and Reduced Compaction a Decade After Mortality 桧树入侵的长期遗产:死亡后十年增加渗透和减少压实
IF 2.4 3区 环境科学与生态学 Q2 ECOLOGY Pub Date : 2025-11-01 Epub Date: 2025-08-18 DOI: 10.1016/j.rama.2025.07.007
Austin R. Kelly , Pedro A.M. Leite , John W. Walker , Bradford P. Wilcox
Woody plant encroachment has altered many rangelands across North America, not only causing substantial changes in ecological and biophysical processes but often converting vast areas of grasslands and savannas into closed-canopy woodlands. While much research has documented impacts that living trees have on their surroundings (such as increases in soil infiltration and organic matter), very little is known about the legacy left by trees after their death or removal. In this study, we examined the legacy of juniper trees, one of the most widespread encroaching woody genera across North America, in the Edwards Plateau region of Texas that were determined to have died during a drought in 2011. Data were collected under canopies of both dead and living junipers, as well as in herbaceous intercanopy, where no trees are known to have grown. The parameters measured were soil infiltrability and compaction. We found that infiltrability of soils under canopies of both live (776 mm h-1) and dead (501 mm h-1) trees were significantly higher than in intercanopy areas (132 mm h-1). Soil compaction was significantly lower under dead trees than in the intercanopy spaces, though compaction under live trees was not significantly distinct. These results suggest that even 10 years after tree death, the positive influences on soil physical properties persist or increase. Further, our findings suggest that the process of juniper encroachment and subsequent dieback (due to either natural causes or management practices) may be an effective method for improving long-term soil development.
木本植物的入侵改变了北美的许多牧场,不仅引起了生态和生物物理过程的实质性变化,而且经常将大片草原和稀树草原转变为封闭的林冠林地。虽然许多研究已经记录了活的树木对周围环境的影响(例如土壤渗透和有机物质的增加),但对树木死亡或移除后留下的遗产知之甚少。在这项研究中,我们研究了德克萨斯州爱德华兹高原地区2011年干旱期间死亡的杜松树的遗产,这是北美最普遍的木本属之一。数据是在死桧和活桧的树冠下收集的,以及在没有树木生长的草本树冠间收集的。测量的参数为土壤渗透性和压实性。研究发现,活树(776 mm h-1)和死树(501 mm h-1)树冠下土壤的渗透性均显著高于树冠间(132 mm h-1)。枯树下土壤压实度显著低于林间空间,而活树下土壤压实度差异不显著。这些结果表明,即使树木死亡10年后,对土壤物理性质的积极影响仍然存在或增加。此外,我们的研究结果表明,杜松入侵和随后的枯死(由于自然原因或管理措施)可能是改善土壤长期发展的有效方法。
{"title":"Long-Term Legacy of Juniper Encroachment: Increased Infiltration and Reduced Compaction a Decade After Mortality","authors":"Austin R. Kelly ,&nbsp;Pedro A.M. Leite ,&nbsp;John W. Walker ,&nbsp;Bradford P. Wilcox","doi":"10.1016/j.rama.2025.07.007","DOIUrl":"10.1016/j.rama.2025.07.007","url":null,"abstract":"<div><div>Woody plant encroachment has altered many rangelands across North America, not only causing substantial changes in ecological and biophysical processes but often converting vast areas of grasslands and savannas into closed-canopy woodlands. While much research has documented impacts that living trees have on their surroundings (such as increases in soil infiltration and organic matter), very little is known about the legacy left by trees after their death or removal. In this study, we examined the legacy of juniper trees, one of the most widespread encroaching woody genera across North America, in the Edwards Plateau region of Texas that were determined to have died during a drought in 2011. Data were collected under canopies of both dead and living junipers, as well as in herbaceous intercanopy, where no trees are known to have grown. The parameters measured were soil infiltrability and compaction. We found that infiltrability of soils under canopies of both live (776 mm h<sup>-1</sup>) and dead (501 mm h<sup>-1</sup>) trees were significantly higher than in intercanopy areas (132 mm h<sup>-1</sup>). Soil compaction was significantly lower under dead trees than in the intercanopy spaces, though compaction under live trees was not significantly distinct. These results suggest that even 10 years after tree death, the positive influences on soil physical properties persist or increase. Further, our findings suggest that the process of juniper encroachment and subsequent dieback (due to either natural causes or management practices) may be an effective method for improving long-term soil development.</div></div>","PeriodicalId":49634,"journal":{"name":"Rangeland Ecology & Management","volume":"103 ","pages":"Pages 71-77"},"PeriodicalIF":2.4,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144865889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Importance of Stocking Rate, Grazing, and Browsing Capacity in Relation to Rainfall on a Wildlife Estate in the Central Free State of South Africa 南非中部自由邦野生动物庄园放养率、放牧和浏览能力对降雨量的重要性
IF 2.4 3区 环境科学与生态学 Q2 ECOLOGY Pub Date : 2025-11-01 Epub Date: 2025-10-27 DOI: 10.1016/j.rama.2025.09.011
Francois Deacon , Wesley John Black
In recent decades, the concept of wildlife estates has emerged as a compelling alternative to traditional golf estates. Wildlife estates provide a novel approach to land management by integrating conservation goals with private property development. The establishment of wildlife estates reflects an innovative land use strategy that balances human development with environmental stewardship. These properties are typically small to medium-sized, necessitating active management to ensure their effectiveness as conservation areas. Scientific monitoring plays a crucial role in this process, particularly in assessing the grazing and browsing capacity of the land as well as the overall condition of the rangeland. Effective management is essential for maintaining the ecological integrity of these estates and ensuring their long-term sustainability. The Woodlands Wildlife Estate, located in the Central Free State Province, serves as a case study for evaluating the habitat conditions and rangeland health in the context of these challenges. This technical report analyses the veld condition, grazing, and browsing capacity of the estate, providing valuable insights into its current status and the effectiveness of its management practices. The findings highlight the importance of adapting conservation models to changing environmental conditions, including drought, and underscore the need for ongoing research and monitoring.
近几十年来,野生动物庄园的概念已经成为传统高尔夫庄园的一个令人信服的替代方案。野生动物庄园通过将保护目标与私人房地产开发相结合,为土地管理提供了一种新颖的方法。野生动物庄园的建立反映了一种创新的土地使用策略,即平衡人类发展与环境管理。这些属性通常是中小型的,需要积极的管理,以确保其作为保护区的有效性。科学监测在这一过程中起着至关重要的作用,特别是在评估土地的放牧和浏览能力以及牧场的总体状况方面。有效的管理对于维持这些庄园的生态完整性和确保其长期可持续性至关重要。位于中央自由邦省的伍德兰野生动物庄园是在这些挑战背景下评估栖息地条件和牧场健康的案例研究。这份技术报告分析了草原状况、放牧和牧场的浏览能力,为其现状和管理实践的有效性提供了有价值的见解。这些发现强调了使保护模式适应不断变化的环境条件(包括干旱)的重要性,并强调了持续研究和监测的必要性。
{"title":"Importance of Stocking Rate, Grazing, and Browsing Capacity in Relation to Rainfall on a Wildlife Estate in the Central Free State of South Africa","authors":"Francois Deacon ,&nbsp;Wesley John Black","doi":"10.1016/j.rama.2025.09.011","DOIUrl":"10.1016/j.rama.2025.09.011","url":null,"abstract":"<div><div>In recent decades, the concept of wildlife estates has emerged as a compelling alternative to traditional golf estates. Wildlife estates provide a novel approach to land management by integrating conservation goals with private property development. The establishment of wildlife estates reflects an innovative land use strategy that balances human development with environmental stewardship. These properties are typically small to medium-sized, necessitating active management to ensure their effectiveness as conservation areas. Scientific monitoring plays a crucial role in this process, particularly in assessing the grazing and browsing capacity of the land as well as the overall condition of the rangeland. Effective management is essential for maintaining the ecological integrity of these estates and ensuring their long-term sustainability. The Woodlands Wildlife Estate, located in the Central Free State Province, serves as a case study for evaluating the habitat conditions and rangeland health in the context of these challenges. This technical report analyses the veld condition, grazing, and browsing capacity of the estate, providing valuable insights into its current status and the effectiveness of its management practices. The findings highlight the importance of adapting conservation models to changing environmental conditions, including drought, and underscore the need for ongoing research and monitoring.</div></div>","PeriodicalId":49634,"journal":{"name":"Rangeland Ecology & Management","volume":"103 ","pages":"Pages 388-394"},"PeriodicalIF":2.4,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145415758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Initial Divergent Postfire Recovery Converges Over the Long-term: A Case Study in Juniper-Encroached Sagebrush Steppe 火灾后最初的发散性恢复在长期内趋于收敛:以杉树侵占的山艾草原为例
IF 2.4 3区 环境科学与生态学 Q2 ECOLOGY Pub Date : 2025-11-01 Epub Date: 2025-10-24 DOI: 10.1016/j.rama.2025.09.009
Jonathan D. Bates, Kirk W. Davies, Rory C. O’Connor, Stella M. Copeland
Reduced fire frequency is recognized as a main cause of piñon–juniper (Pinus–Juniperus L.) expansion in western North American sagebrush steppe and grasslands. Piñon–juniper woodland control using prescribed fire and mechanical treatments have increased the past three decades with the goal of restoring sagebrush steppe plant communities. Factors shaping the response of sagebrush steppe communities following woodland treatment include shrub and herbaceous composition, level of tree dominance, and site characteristics. We compared vegetation recovery spanning 20 yr following prescribed fire on mid-succession and late-succession western juniper (Juniperus occidentalis Hook.) woodlands on Steens Mountain, Oregon. Our objective was to evaluate vegetation dynamics between early (first decade) and later successional (second decade) time periods after fire. The first decade after fire vegetation on burned mid-succession sites were codominated by native herbaceous perennials and sprouting shrub species and on late-succession sites vegetation was codominated by nonnative cheatgrass (Bromus tectorum L.) and snowbrush (Ceanothus velutinus Dougl.). During the second decade after fire, vegetation composition converged and both mid-succession and late-succession sites were codominated by herbaceous perennials, mountain big sagebrush (Artemisia tridentata spp. vaseyana [Rydb.] Beetle), round-leaf snowberry (Symphoricarpos rotundifolius A. Gray) and snowbrush. Herbaceous and shrub vegetation composition of both burned woodland phases proved to be highly resilient to fire, the difference was that native shrub-herbaceous recovery on late-succession sites required about twice as much time as mid-succession sites. The resilience of both mid-succession and late-succession woodland sites was likely a product of ecological site characteristics (e.g., elevation and precipitation zone) that affords a competitive advantage for native perennial species over invasive annuals.
火灾频率的降低被认为是piñon-juniper (Pinus-Juniperus L.)在北美西部山艾草草原和草原扩张的主要原因。Piñon-juniper过去三十年来,使用规定的火灾和机械处理的林地控制增加了,目的是恢复山艾草草原植物群落。林地处理对山艾草草原群落响应的影响因素包括灌木和草本植物组成、乔木优势水平和立地特征。本文比较了俄勒冈州斯滕斯山中后期西部桧林地在规定火灾后20年的植被恢复情况。我们的目标是评估火灾后早期(第一个十年)和后期演替(第二个十年)期间的植被动态。中期演替地火灾后的前10年植被主要为原生草本多年生植物和出芽灌木,后期演替地植被主要为非原生草(Bromus tectorum L.)和雪灌丛(Ceanothus velutinus Dougl.)。在火灾后的第二个10年,植被组成趋于一致,中后期演替地均以草本多年生植物、山艾(Artemisia tridentata sp . vaseyana) [Rydb.]]甲虫),圆叶雪莓(Symphoricarpos rotundifolius A. Gray)和雪刷草。草本和灌木植被组成在两个烧毁林地阶段都具有高度的火灾恢复能力,不同之处在于,在演替后期的原生灌木-草本植被恢复所需的时间大约是演替中期的两倍。中期演替和晚期演替林地的恢复力可能是生态场地特征(如海拔和降水带)的产物,这些特征为本地多年生物种提供了相对于入侵的一年生物种的竞争优势。
{"title":"Initial Divergent Postfire Recovery Converges Over the Long-term: A Case Study in Juniper-Encroached Sagebrush Steppe","authors":"Jonathan D. Bates,&nbsp;Kirk W. Davies,&nbsp;Rory C. O’Connor,&nbsp;Stella M. Copeland","doi":"10.1016/j.rama.2025.09.009","DOIUrl":"10.1016/j.rama.2025.09.009","url":null,"abstract":"<div><div>Reduced fire frequency is recognized as a main cause of piñon–juniper (<em>Pinus–Juniperus</em> L.) expansion in western North American sagebrush steppe and grasslands. Piñon–juniper woodland control using prescribed fire and mechanical treatments have increased the past three decades with the goal of restoring sagebrush steppe plant communities. Factors shaping the response of sagebrush steppe communities following woodland treatment include shrub and herbaceous composition, level of tree dominance, and site characteristics. We compared vegetation recovery spanning 20 yr following prescribed fire on mid-succession and late-succession western juniper (<em>Juniperus occidentalis</em> Hook.) woodlands on Steens Mountain, Oregon. Our objective was to evaluate vegetation dynamics between early (first decade) and later successional (second decade) time periods after fire. The first decade after fire vegetation on burned mid-succession sites were codominated by native herbaceous perennials and sprouting shrub species and on late-succession sites vegetation was codominated by nonnative cheatgrass (<em>Bromus tectorum</em> L.) and snowbrush (<em>Ceanothus velutinus</em> Dougl.). During the second decade after fire, vegetation composition converged and both mid-succession and late-succession sites were codominated by herbaceous perennials, mountain big sagebrush (<em>Artemisia tridentata</em> spp. <em>vaseyana</em> [Rydb.] Beetle), round-leaf snowberry (<em>Symphoricarpos rotundifolius</em> A. Gray) and snowbrush. Herbaceous and shrub vegetation composition of both burned woodland phases proved to be highly resilient to fire, the difference was that native shrub-herbaceous recovery on late-succession sites required about twice as much time as mid-succession sites. The resilience of both mid-succession and late-succession woodland sites was likely a product of ecological site characteristics (e.g., elevation and precipitation zone) that affords a competitive advantage for native perennial species over invasive annuals.</div></div>","PeriodicalId":49634,"journal":{"name":"Rangeland Ecology & Management","volume":"103 ","pages":"Pages 377-387"},"PeriodicalIF":2.4,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145361712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
Rangeland Ecology & Management
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1