Journal of Arid Environments最新文献_第8页

Effect of the landscape on hunting in a conservation area in the semiarid region of northeastern Brazil 巴西东北部半干旱区保护区景观对狩猎的影响

IF 2.5 3区环境科学与生态学 Q2 ECOLOGY

Journal of Arid Environments

Pub Date : 2025-08-27 DOI: 10.1016/j.jaridenv.2025.105460

Natália das Neves Ramos Correia , Juliana Mondinne Mendes de Oliveira , Pablo Riul , Kallyne Machado Bonifácio , Denise Dias da Cruz

Hunting provides important resources and incomes for millions of people, especially in biodiversity-rich developing countries. Several factors, including the ecology of the target species, personal preferences, food taboos of populations, and landscape features, influence hunting. This study aimed to define the poaching strategies and landscape effects on poaching in the Sete Cidades National Park (PARNA), a conservation unit in the Brazilian Cerrado. Data collected from official reports showed that infractions against wildlife represented the third-largest category of notices, but only two were related to hunting activity. Mapping traces of illegal hunting on the PARNA identified 21 hunting traces under five categories, including the tocaia and ceva (hunting strategies used in the study region), suggesting a relationship between hunting and the percentage and density of shrub formations. No correlation was found between the landscape diversity and hunting intensity. However, a possible association was found between mapped poaching traces, roads, and old poaching routes. A disparity was observed between the number of hunting traces mapped and the number of PARNA infraction notices, demonstrating the need to increase inspections, especially in the southern part.

狩猎为数百万人提供了重要的资源和收入，特别是在生物多样性丰富的发展中国家。有几个因素影响狩猎，包括目标物种的生态、个人偏好、种群的食物禁忌和景观特征。本研究旨在确定巴西塞拉多保护区塞特Cidades国家公园（PARNA）的偷猎策略和景观对偷猎的影响。从官方报告中收集的数据显示，侵害野生动物的违法行为占通知的第三大类，但只有两类与狩猎活动有关。在PARNA上绘制非法狩猎痕迹，确定了包括tocaia和ceva（研究地区使用的狩猎策略）在内的5类21种狩猎痕迹，表明狩猎与灌木形成的百分比和密度之间存在关系。景观多样性与狩猎强度之间没有相关性。然而，在地图上的偷猎痕迹、道路和旧的偷猎路线之间发现了可能的联系。在绘制的狩猎痕迹数量与违反PARNA的通知数量之间存在差异，这表明需要增加检查，特别是在南部。

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引用次数: 0

Impact of land use land cover change on catchment hydrological response in 576 Iranian catchments 伊朗576个流域土地利用、土地覆被变化对流域水文响应的影响

IF 2.5 3区环境科学与生态学 Q2 ECOLOGY

Journal of Arid Environments

Pub Date : 2025-08-25 DOI: 10.1016/j.jaridenv.2025.105463

Afshin Jahanshahi , Martijn J. Booij , Sopan D. Patil , Hoshin Gupta

Land use and land cover (LULC) changes significantly impact hydrological processes in semi-arid regions like Iran, where national-scale studies are scarce. This study assesses LULC change impacts from 2001 to 2022 on runoff and hydrological drought across Iran's 576 catchments (410,000 km²) using the Soil and Water Assessment Tool Plus (SWAT+). This analysis employs a novel SWAT + framework integrating crop-specific calibrations (e.g., wheat, barley, rice), human interventions (e.g., irrigation, reservoir operations, interbasin diversions), and Curve Number (CN) dynamics, achieving robust performance (NSE: 0.50–0.88; KGE: 0.51–0.90). Evergreen forest loss (4.8 %–2.8 %) and agricultural expansion (20 %–27.8 %) increased annual runoff by 1.21 mm/month, with a 2.7 mm/month rise during the March–May rainy season, driven by 10–15 % reduced canopy interception and 5–10 % CN increases in arid catchments. Hydrological drought frequency rose 15 % in western and central catchments, with duration extending 1.2–1.8 months and severity increasing 5 %, linked to higher surface runoff (1.5–2.7 mm/month). Impacts were pronounced in arid and semi-arid regions (150–300 mm/year precipitation). This study advances LULC impact assessments by integrating runoff and drought analyses with CN dynamics, offering policy strategies like reforestation and precision irrigation for sustainable water management in semi-arid environments.

土地利用和土地覆盖（LULC）变化显著影响伊朗等半干旱地区的水文过程，而这些地区的国家级研究很少。本研究利用土壤和水评估工具Plus （SWAT+）评估了2001年至2022年LULC变化对伊朗576个流域（41万平方公里）径流和水文干旱的影响。该分析采用了一种新的SWAT +框架，整合了作物特定校准（如小麦、大麦、水稻）、人为干预（如灌溉、水库操作、流域间改道）和曲线数（CN）动态，实现了稳健的性能（NSE: 0.50-0.88; KGE: 0.51-0.90）。常绿森林损失（4.8% - 2.8%）和农业扩张（20% - 27.8%）使年径流量增加1.21 mm/月，其中3 - 5月雨季径流量增加2.7 mm/月，这是由于干旱流域林冠截流减少10 - 15%和CN增加5 - 10%造成的。西部和中部流域的水文干旱频率增加了15%，持续时间延长了1.2-1.8个月，严重程度增加了5%，与地表径流增加（1.5-2.7毫米/月）有关。在干旱和半干旱地区（150 ~ 300 mm/年）影响显著。本研究通过将径流和干旱分析与CN动态相结合来推进LULC影响评估，为半干旱环境下的可持续水管理提供再造林和精准灌溉等政策策略。

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引用次数: 0

Crop growth characteristics in semiarid sandy regions: associations with hydrological years and temporal precipitation patterns 半干旱沙区作物生长特征：与水文年和时间降水模式的关系

IF 2.5 3区环境科学与生态学 Q2 ECOLOGY

Journal of Arid Environments

Pub Date : 2025-08-22 DOI: 10.1016/j.jaridenv.2025.105462

Jiaqi Fan , Jiaqi Zhang , Xiaoke Guan , Yan Xu

Cultivated land is indispensable for promoting sustainable socioeconomic development. Therefore, investigating crop growth is essential for ensuring the stable utilization of cultivated land. This study assessed the spatial and temporal variations in crop growth across hydrological years and investigated the mechanisms linking the temporal distribution of precipitation to crop phenological responses via an integrated analysis of the MODIS EVI and daily precipitation datasets (2002–2020). The findings indicated significant interannual variability in precipitation throughout the spring maize growing season, with only 23.33 % of the years classified as normal. Spatially, crop performance was better in the eastern and southern regions than in the western and northern regions. Crucially, the alignment between precipitation timing and crop phenological stage emerged as a more significant factor than total precipitation. When the timing of water availability mismatches crop water demands, even high precipitation levels may fail to support optimal growth. To increase water use efficiency, adaptive strategies are proposed: prioritizing water allocation during key growth stages, adopting diverse irrigation approaches, and maintaining water conservancy infrastructures. These outcomes are crucial for promoting the sustainable utilization of cultivated land and safeguarding ecological security in semiarid areas.

耕地是促进社会经济可持续发展的必要条件。因此，研究作物生长状况对确保耕地的稳定利用至关重要。本研究通过对MODIS EVI和日降水数据集（2002-2020）的综合分析，评估了不同水文年作物生长的时空变化，并探讨了降水时间分布与作物物候响应之间的联系机制。结果表明，在整个春玉米生长季，降水量具有显著的年际变化，只有23.33%的年份属于正常年份。从空间上看，东部和南部地区的作物生产性能好于西部和北部地区。重要的是，降水时间与作物物候期之间的一致性比总降水量更为显著。当水分供应时间与作物需水量不匹配时，即使高降水水平也可能无法支持最佳生长。为了提高水资源利用效率，提出了在关键生长阶段优先分配水资源、采用多种灌溉方式和维护水利基础设施的适应性策略。这些成果对促进半干旱区耕地可持续利用、保障生态安全具有重要意义。

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引用次数: 0

Farmers’ attitude and intention towards medicinal plants cultivation: experiences from semi-arid areas of Iran 农民对药用植物种植的态度和意向：来自伊朗半干旱地区的经验

IF 2.5 3区环境科学与生态学 Q2 ECOLOGY

Journal of Arid Environments

Pub Date : 2025-08-22 DOI: 10.1016/j.jaridenv.2025.105465

Ali Akbar Barati , Ali Asadi , Hengameh Sardar Shahraki , Milad Dehghani Pour , Mohammad Reza Naroui Rad

The livelihoods of a considerable portion of the population in arid and semi-arid regions, particularly in rural communities, depends on small-scale agriculture. Despite the growing global demand for medicinal plants (MPs), little is known about the behavioral mechanisms influencing farmers' adoption decisions in challenging environments like Iran. This study fills this gap by extending the Technology Acceptance Model (TAM) to examine farmers' adoption behavior of MPs cultivation, incorporating contextual challenges as external factors. Data were collected through structured questionnaires administered to 139 randomly selected farmers and all 25 pre-identified experts with specialized knowledge and field experience in medicinal plants in Sistan and Baluchestan province, Iran. Partial Least Squares Structural Equation Modeling (PLS-SEM) was employed to analyze the relationships between challenges, perceived ease of use, usefulness, and adoption behavior. The results revealed that while farmers had a positive attitude toward MPs' usefulness (mean score: 3.18/5), adoption was hindered by low perceived ease of cultivation (mean: 1.77/5). Key challenges included high production costs (ranked 1st by CV = 0.332), lack of marketing infrastructure (CV = 0.333), and technical skill gaps. Crucially, farmers’ intentions were influenced more by perceived ease (β = 0.520) than usefulness (β = 0.185), contrasting with classic TAM predictions. This highlights a disconnect between economic potential and practical feasibility in resource-scarce settings. The study contributes to the literature by demonstrating the dominance of ease-of-use over usefulness in agricultural technology adoption among low-literacy farmers; quantifying the mediating role of infrastructural and technical barriers on behavioral intentions; and providing actionable insights for policymakers to prioritize skill development and value-chain investments over purely economic incentives.

在干旱和半干旱地区，特别是在农村社区，相当一部分人口的生计依赖于小规模农业。尽管全球对药用植物（MPs）的需求不断增长，但在伊朗等具有挑战性的环境中，对影响农民采用决定的行为机制知之甚少。本研究通过扩展技术接受模型（TAM）来考察农民对MPs种植的采用行为，并将情境挑战作为外部因素，填补了这一空白。通过结构化问卷收集数据，对伊朗锡斯坦和俾路支斯坦省随机选择的139名农民和所有25名预先确定的具有药用植物专业知识和实地经验的专家进行调查。采用偏最小二乘结构方程模型（PLS-SEM）分析挑战、感知易用性、有用性和采用行为之间的关系。结果显示，虽然农民对MPs的有用性持积极态度（平均得分：3.18/5），但由于种植容易程度低（平均得分：1.77/5），采用受到阻碍。主要挑战包括高生产成本（CV = 0.332排名第一）、缺乏营销基础设施（CV = 0.333）和技术技能差距。关键是，与经典的TAM预测相比，农民的意图更受感知到的易用性（β = 0.520）而不是有用性（β = 0.185）的影响。这突出了在资源稀缺环境中经济潜力与实际可行性之间的脱节。该研究通过证明在低文化水平的农民中，易用性比有用性在农业技术采用中占主导地位，从而为文献做出了贡献；量化基础设施壁垒和技术壁垒对行为意向的中介作用并为政策制定者提供可操作的见解，将技能发展和价值链投资置于纯粹的经济激励之上。

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引用次数: 0

Do nurse plants enhance cactus survival under global warming? Experimental evidence from Coryphantha maiz-tablasensis, a threatened species 在全球变暖的情况下，护理植物能提高仙人掌的存活率吗？来自濒危物种玉米-tablasensis的实验证据

IF 2.5 3区环境科学与生态学 Q2 ECOLOGY

Journal of Arid Environments

Pub Date : 2025-08-20 DOI: 10.1016/j.jaridenv.2025.105461

Francisco Arturo Guerra-Coss , Joel Flores , José Luis Aragón-Gastelum , Ernesto I. Badano , Hugo M. Ramírez-Tobías

Climate change poses a significant threat to arid and semiarid ecosystems, where drought, high solar radiation, and extreme temperatures limit plant regeneration. This study evaluated whether nurse plants can mitigate the effects of global warming and enhance the survival of Coryphantha maiz-tablasensis, a threatened cactus endemic to the Chihuahuan Desert. The experiment was conducted in San Luis Potosí, Mexico, using open-top chambers to simulate warming in two contrasting habitats: an abandoned agricultural field and beneath the canopy of Neltuma laevigata (mesquite), a common nurse plant. Simulated warming significantly increased air temperature, particularly in open areas. Although rainfall and soil moisture were lower under the mesquite canopy, cactus survival was substantially higher in this habitat—100 % in control plots and 95 % in warming plots—compared to 90 % survival in open control plots and complete mortality in open warming plots. These findings indicate that direct exposure to elevated temperatures and solar radiation is lethal to saplings. The results underscore the critical role of N. laevigata in buffering microclimatic extremes and supporting cactus regeneration. Incorporating nurse plants into conservation and restoration strategies may help reduce population loss under future climate change scenarios and ensure the long-term persistence of threatened cactus species.

气候变化对干旱和半干旱生态系统构成重大威胁，干旱、高太阳辐射和极端温度限制了植物的再生。本研究评估了护理植物是否可以缓解全球变暖的影响，并提高奇瓦瓦沙漠特有的濒危仙人掌Coryphantha maiz-tablasensis的存活率。实验是在墨西哥的圣路易斯Potosí进行的，使用开顶室来模拟两个不同栖息地的变暖：一个是废弃的农田，另一个是在一种常见的护士植物Neltuma laevigata（豆科植物）的树冠下。模拟变暖显著提高了空气温度，特别是在开阔地区。尽管牧豆树树冠下的降雨量和土壤湿度较低，但与开放的对照区90%的存活率和开放的增温区完全死亡相比，该生境的仙人掌存活率明显更高——对照区100%，增温区95%。这些发现表明，直接暴露在高温和太阳辐射下对树苗是致命的。研究结果强调了仙人掌在缓冲极端小气候和支持仙人掌再生方面的重要作用。将护理植物纳入保护和恢复策略可能有助于减少未来气候变化情景下的种群损失，并确保受威胁仙人掌物种的长期持久性。

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引用次数: 0

Determining the best strategies to improve agricultural water productivity in arid and semi-arid regions: An ordinal priority approach 确定改善干旱和半干旱地区农业用水生产力的最佳战略：一种优先顺序方法

IF 2.5 3区环境科学与生态学 Q2 ECOLOGY

Journal of Arid Environments

Pub Date : 2025-08-15 DOI: 10.1016/j.jaridenv.2025.105458

Sasan Esfandiari Bahraseman , Ali Firoozzare , Flavio Boccia , Fateme Pourmohammad , Amir Hossein Ameri

The exponential growth of the world's population has significantly increased the demand for food. Agriculture, as the main provider of food, faces severe constraints due to limited water resources. In this context, improving agricultural water productivity is one of the most effective solutions to address water crises, ultimately leading to increases in both the quantity and quality of agricultural products. This study aimed to identify and prioritize the most effective strategies for improving agricultural water productivity in arid and semi-arid regions, with a particular focus on Mashhad County in Iran. Through interviews with experts and the use of the Ordinal Priority Approach (OPA), four criteria (operational effectiveness, social acceptance, economic efficiency, and ecological sustainability) and 27 strategies were identified and prioritized. The results revealed that institutional and policy interventions received the highest priority, followed by capacity-building and awareness interventions, and irrigation technology interventions. Agronomic and genetic interventions, as well as water resource management interventions, received the lowest priority. The findings and recommendations of this study provide valuable insights for policymakers, water managers, and agricultural stakeholders to develop and implement effective strategies to improve water productivity, enhance food security, and promote sustainable agricultural practices in arid and semi-arid regions.

世界人口的指数增长大大增加了对食物的需求。农业作为粮食的主要提供者，由于水资源有限而面临严重制约。在这种情况下，提高农业用水生产率是解决水危机的最有效办法之一，最终将提高农产品的数量和质量。本研究旨在确定干旱和半干旱地区提高农业用水生产力的最有效战略并确定其优先顺序，特别关注伊朗的马什哈德县。通过与专家的访谈和使用顺序优先方法（OPA），确定了四个标准（业务有效性、社会接受度、经济效率和生态可持续性）和27个战略并进行了优先排序。结果显示，体制和政策干预措施获得最高优先级，其次是能力建设和意识干预措施，以及灌溉技术干预措施。农艺和遗传干预措施以及水资源管理干预措施的优先程度最低。本研究的发现和建议为政策制定者、水资源管理者和农业利益相关者制定和实施有效的战略提供了宝贵的见解，以提高干旱和半干旱地区的水生产力，加强粮食安全，促进可持续农业实践。

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引用次数: 0

A perfect storm: unprecedented expansion of the Namib Desert and cascading desertification processes in the northernmost Succulent Karoo 一场完美的风暴：纳米布沙漠前所未有的扩张和最北端多肉的卡鲁的层层叠叠式沙漠化过程

IF 2.5 3区环境科学与生态学 Q2 ECOLOGY

Journal of Arid Environments

Pub Date : 2025-08-13 DOI: 10.1016/j.jaridenv.2025.105459

Norbert Jürgens , Antje Burke , Pieter van Wyk , Alexander Gröngröft , Jens Oldeland

Arid regions are characterized by high unpredictability of rainfall. Consequently, ecosystems along their margins are naturally oscillating but usually resilient. Here, we report the severe and potentially irreversible degradation of vegetation, ecosystems, and biodiversity in the northernmost more than 1 million ha of the Succulent Karoo, a global biodiversity hotspot. In our study, we use monitoring data spanning 45 years to disentangle different processes of change which started decades ago. The regionally important, vulnerable ecosystem “Gariep silty plains” is inhabited by the species-rich vegetation alliance Brownanthion pseudoschlichtiani. The cushion-like dwarf shrub scorpionstail (Brownanthus pseudoschlichtianus, Aizoaceae) is the dominant plant species protecting the soil and facilitating silt sedimentation. Following disturbances, this vegetation type is thinning and losing perennial plant species. This allows aeolian erosion, which – as a tipping point - turns the silty topsoil into sandy soil across extensive areas. Increased mobilisation of aeolian sand causes abrasion and sedimentation, which buries vast landscapes. The newly developed sandy topsoils are invaded by species-poor grassland communities partly typical for the Namib Desert biome. We present a novel S&T model and discuss cascading effects which threaten nature, farmland and infrastructure. Farming, mining, road construction and climate change may be interacting drivers of degradation.

干旱地区的特点是雨量的高度不可预测性。因此，沿其边缘的生态系统自然振荡，但通常具有弹性。在这里，我们报告了全球生物多样性热点地区多肉卡鲁最北端超过100万公顷的植被、生态系统和生物多样性严重且可能不可逆转的退化。在我们的研究中，我们使用跨越45年的监测数据来理清几十年前开始的不同变化过程。Gariep粉质平原是区域内重要而脆弱的生态系统，是物种丰富的植被联盟。垫状矮灌木蝎尾（Brownanthus pseudoschlichtianus, Aizoaceae）是保护土壤和促进泥沙沉积的优势植物。受到干扰后，这种植被类型变薄，多年生植物种类减少。这使得风成侵蚀成为可能，而风成侵蚀作为一个临界点，在广大地区将粉质表土变成沙土。风成沙的移动增加导致了磨损和沉积，掩埋了大片的地貌。新开发的沙质表土被物种贫乏的草地群落入侵，部分是纳米布沙漠生物群系的典型特征。我们提出了一个新的S&；T模型，并讨论了威胁自然、农田和基础设施的级联效应。农业、采矿、道路建设和气候变化可能是相互作用的退化驱动因素。

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引用次数: 0

Location differences in senescence and leaf macronutrient concentrations for selected tree species in the savannah woodlands of Botswana 博茨瓦纳热带稀树草原上某些树种衰老和叶片大量营养物质浓度的位置差异

IF 2.5 3区环境科学与生态学 Q2 ECOLOGY

Journal of Arid Environments

Pub Date : 2025-08-12 DOI: 10.1016/j.jaridenv.2025.105457

G.L. Modutlwe , C. Munyati , B. Moseki

Trees are a core component of savannah vegetation content, with vital ecosystem functions. Therefore, determining location differences in their senescence time and leaf macronutrient (MN) concentrations can yield indicators of differences in habitat quality. In this work, senescence time and MN levels in three common tree species (Colophospermum mopane, Grewia flava, Vachellia erioloba) in the semi-arid savannah woodlands of Botswana were studied, at three temperature and rainfall-contrasted study sites. Chlorophyll (Chl) levels in sample tree leaves were measured weekly in the March–May (autumn) period using a chlorophyll meter that utilised the blue + red absorption and green reflectance Chl properties. In the same period, sampling tree Green Leaf Index (GLI) values were computed from periodic (approximately every five days) cloud-free 10 m resolution Sentinel-2 MSI images. Some image dates coincided with the Chl measurement dates, which facilitated predictive modelling using GLI values. Leaf MN concentrations were determined once-off, during the peak phenology period. Graphical plots of measured Chl and GLI values indicated the onset of senescence, through the commencement of sustained reductions. Trees in the hotter, more arid site generally had earlier senescence and lower nitrogen and phosphorous concentrations than same species trees in cooler, higher rainfall sites.

树木是草原植被的核心组成部分，具有重要的生态系统功能。因此，确定其衰老时间和叶片宏量养分（MN）浓度的位置差异可以得到生境质量差异的指标。在这项工作中，研究了三种常见树种（Colophospermum mopane, Grewia flava, Vachellia erioloba）在博茨瓦纳半干旱大草原林地的衰老时间和MN水平，在三个温度和降雨量对比的研究地点。利用利用蓝+红吸收和绿反射Chl特性的叶绿素计，在3月至5月（秋季）期间每周测量样品树叶中的叶绿素（Chl）水平。在同一时期，采样树的绿叶指数（GLI）值从定期（大约每5天）无云的10 m分辨率Sentinel-2 MSI图像中计算。一些图像日期与Chl测量日期相吻合，这有助于使用GLI值进行预测建模。在物候高峰期间一次性测定叶片MN浓度。测量的Chl和GLI值的图形图表明衰老的开始，通过持续减少的开始。在较热、较干旱的地点生长的树木通常比在较冷、较高降雨量地点生长的相同树种的树木衰老得更早，氮和磷浓度也更低。

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引用次数: 0

Synergistic pathways to promote nature-based Solutions: How policy and peer collaboration shape herder decisions on artificial pasture cultivation in Qinghai, China 促进基于自然的解决方案的协同途径：政策和同伴协作如何影响中国青海牧民对人工草场种植的决策

IF 2.5 3区环境科学与生态学 Q2 ECOLOGY

Journal of Arid Environments

Pub Date : 2025-08-06 DOI: 10.1016/j.jaridenv.2025.105452

Dayuan Xing , Liqun Shao , Xiangwei Zhang , Haibin Chen , Han Zhang

Recognized as a Nature-based Solution (NbS), artificial pasture cultivation (APC) provides a viable alternative forage source for livestock production while supporting the restoration and conservation of natural grasslands. However, its successful implementation relies crucially on coordinated efforts between government and local institutions, yet empirical studies examining their interplay remain scarce. Given that herders' adoption of APC is a rational decision-making process shaped by subjective cognition, this study develops an extended theory of planned behavior (TPB) framework to evaluate how policy intervention and peer collaboration influence adoption. Using survey data from 363 herder households in Qinghai Province, China, SEM is employed and the results show that policy intervention and peer collaboration significantly improve herders’ behavior intention and actual implementation of APC practice. Government policies predominantly reinforce subjective norms and perceived behavioral control via regulatory measures and financial incentives, while peer collaboration leverages weak-tie organizational networks to facilitate knowledge dissemination and reciprocal support. These findings imply that effective NbS promotion requires context-specific policy designs that combine complementary instruments. In cases where NbS adoption involves high costs or substantial production adjustments, integrating policy implementation with existing local collaborative networks can enhance implementation effectiveness.

人工牧场（APC）被认为是一种基于自然的解决方案（NbS），它为畜牧业生产提供了一种可行的替代饲料来源，同时支持自然草地的恢复和保护。然而，它的成功实施在很大程度上依赖于政府和地方机构之间的协调努力，但检验它们之间相互作用的实证研究仍然很少。考虑到牧民采用APC是一个受主观认知影响的理性决策过程，本研究建立了一个扩展的计划行为理论框架来评估政策干预和同伴协作对牧民采用APC的影响。利用青海省363户牧民家庭的调查数据，运用SEM进行实证分析，结果表明政策干预和同伴协作显著提高了牧民APC实践的行为意愿和实际实施情况。政府政策主要通过监管措施和财政激励加强主观规范和感知行为控制，而同伴合作利用弱联系组织网络促进知识传播和相互支持。这些发现表明，有效的国家统计局推广需要结合互补工具的具体情况的政策设计。在采用国家统计局涉及高成本或重大生产调整的情况下，将政策实施与现有的地方协作网络相结合可以提高实施效率。

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引用次数: 0

Food habits of the Lesser grison Galictis cuja (Molina, 1782) in the Huasco coastal desert, Los Choros, northern Chile 智利北部洛斯克洛斯的华斯科沿海沙漠中的Galictis cuja （Molina, 1782）的饮食习惯

IF 2.5 3区环境科学与生态学 Q2 ECOLOGY

Journal of Arid Environments

Pub Date : 2025-08-06 DOI: 10.1016/j.jaridenv.2025.105434

Carlos Zuleta-Ramos , Jaime R. Rau

The Lesser grison, Galictis cuja, is a carnivorous mammal widely distributed in South America. However, its conservation status and natural history are poorly understood throughout much of its range. In Chile, it is found in all regions of the country from deserts in the north to temperate rainforests in the south. This species is characterized as Rare in most of the habitats where it has been recorded. This study analyzed the diet of G. cuja in the Huasco coastal desert of the Coquimbo Region, northern Chile. Sixty-three fecal samples were collected in September 2010 (spring), which were then analyzed and categorized using keys and reference collections. Its diet was generalist, consisting of imago arthropods, larvae, and pupae, which represented 75 % of the prey consumed. Coleoptera of the family Tenebrionidae were the most frequently found trophic category in the diet. However, the Lesser grison also consumes wild rodents, which accounted for 25 % of its diet, with the Darwin leaf-eared mouse Phyllotis darwini (about 50 g) being the most frequent prey item. This suggests that their diet in this arid ecosystem is generalist, which could also be related to the resources available in a fluctuating environment.

美洲狮，Galictis cuja，是一种广泛分布于南美洲的食肉哺乳动物。然而，它的保护状况和自然历史在其大部分范围内都知之甚少。在智利，从北部的沙漠到南部的温带雨林，它分布在该国的所有地区。这一物种的特点是罕见的，在大多数栖息地，它已被记录。本研究分析了智利北部科金博地区Huasco沿海沙漠中的G. cuja的饮食。2010年9月（春季）收集了63份粪便样本，然后使用钥匙和参考样本进行分析和分类。其食性是多面体，包括象类节肢动物、幼虫和蛹，占猎物食性的75%。在饮食中最常发现的营养类别是拟甲科鞘翅目。然而，小灰鼠也吃野生啮齿动物，占其饮食的25%，其中达尔文叶耳鼠Phyllotis Darwin（约50克）是最常见的猎物。这表明它们在干旱生态系统中的饮食是多面手，这也可能与波动环境中的可用资源有关。

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