Pub Date : 2025-10-21DOI: 10.1016/j.rama.2025.09.004
Anthony Mapaura , Kim Canavan , David M. Richardson , Joao de Deus Vidal Junior , V. Ralph Clark , Sandy-Lynn Steenhuisen
Three South American Nassella species (N. neesiana, N. tenuissima and N. trichotoma) have naturalized in South Africa but have not yet been reported in Lesotho. Of these, N. tenuissima and N. trichotoma have been recognized as serious invaders since the 1970s. Assessing their current and future distributions is crucial for understanding the threats they pose in both countries. This study addressed the following questions: 1) What key bioclimatic variables control the geographical distribution of these species? 2) What is the current potential distribution range? and 3) What is the future potential distribution under three carbon-emission scenarios using estimates for the period 2071–2100? Nine non-collinear predictors from the CHELSEA database were selected for Maxent species distribution models. These models were projected under future climate scenarios, incorporating three Shared Socioeconomic Pathways (SSPs) from five global circulation models. Results showed that temperature-related variables, particularly mean diurnal range, were critical for all species, while precipitation in the driest month also influenced N. trichotoma. Results suggest that all three species can potentially occupy a greater area than they currently occupy. While highly suitable area is predicted to contract for all species, the Maloti-Drakensberg region—including in Lesotho—is predicted to become increasingly suitable. This poses a severe risk to the endemic-rich biodiversity and rangeland productivity. Much of Lesotho is affected by overgrazing and other disturbances which favor Nassella establishment. Proactive surveillance directed at early detection of Nassella incursion into Lesotho should be given high priority.
三种南美纳塞拉（neesiana N. neesiana， N. tenuissima和N. trichotoma）已在南非归化，但尚未在莱索托报告。其中，tenuissima和trichotoma自20世纪70年代以来被认为是严重的入侵者。评估它们目前和未来的分布对于了解它们在这两个国家构成的威胁至关重要。本研究解决了以下问题：1)哪些关键的生物气候变量控制了这些物种的地理分布？2)当前的潜在分布范围是什么？3)在三种碳排放情景下，使用2071-2100年的估计值，未来的潜在分布是什么？从CHELSEA数据库中选择9个非共线性预测因子用于Maxent物种分布模型。这些模型在未来气候情景下进行了预估，纳入了来自五个全球环流模型的三个共享社会经济路径（ssp）。结果表明，温度相关变量，特别是平均日差，对所有物种都至关重要，而最干旱月份的降水也会影响赤眼蜂。结果表明，这三个物种可能占据比目前更大的面积。虽然所有物种的高度适宜区域预计都将缩小，但马洛蒂-德拉肯斯堡地区（包括莱索托）预计将变得越来越适宜。这对地方性丰富的生物多样性和牧场生产力构成严重威胁。莱索托的大部分地区都受到过度放牧和其他干扰的影响，这些干扰有利于纳塞拉的建立。应高度优先重视旨在及早发现纳塞拉入侵莱索托的主动监测。
{"title":"Implications of Climate Change for the Distribution of the Invasive Grass Genus Nassella in South Africa and Lesotho","authors":"Anthony Mapaura , Kim Canavan , David M. Richardson , Joao de Deus Vidal Junior , V. Ralph Clark , Sandy-Lynn Steenhuisen","doi":"10.1016/j.rama.2025.09.004","DOIUrl":"10.1016/j.rama.2025.09.004","url":null,"abstract":"<div><div>Three South American <em>Nassella</em> species (<em>N. neesiana, N. tenuissima</em> and <em>N. trichotoma</em>) have naturalized in South Africa but have not yet been reported in Lesotho. Of these, <em>N. tenuissima</em> and <em>N. trichotoma</em> have been recognized as serious invaders since the 1970s. Assessing their current and future distributions is crucial for understanding the threats they pose in both countries. This study addressed the following questions: 1) What key bioclimatic variables control the geographical distribution of these species? 2) What is the current potential distribution range? and 3) What is the future potential distribution under three carbon-emission scenarios using estimates for the period 2071–2100? Nine non-collinear predictors from the CHELSEA database were selected for Maxent species distribution models. These models were projected under future climate scenarios, incorporating three Shared Socioeconomic Pathways (SSPs) from five global circulation models. Results showed that temperature-related variables, particularly mean diurnal range, were critical for all species, while precipitation in the driest month also influenced <em>N. trichotoma</em>. Results suggest that all three species can potentially occupy a greater area than they currently occupy. While highly suitable area is predicted to contract for all species, the Maloti-Drakensberg region—including in Lesotho—is predicted to become increasingly suitable. This poses a severe risk to the endemic-rich biodiversity and rangeland productivity. Much of Lesotho is affected by overgrazing and other disturbances which favor <em>Nassella</em> establishment. Proactive surveillance directed at early detection of <em>Nassella</em> incursion into Lesotho should be given high priority.</div></div>","PeriodicalId":49634,"journal":{"name":"Rangeland Ecology & Management","volume":"103 ","pages":"Pages 367-376"},"PeriodicalIF":2.4,"publicationDate":"2025-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145361713","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}
Pub Date : 2025-10-21DOI: 10.1016/j.rama.2025.09.005
José L. Oviedo , Lynn Huntsinger , Nathan D. Van Schmidt , Steven R. Beissinger
Research on private ownership of rural land often draws on many factors in attempting to explain land use and management decisions, including landownership motivations. In this article, we present the results of a survey of private landowners in the Sierra Nevada foothills of Yuba, Nevada, and Butte counties (California), in a rangeland setting that is mostly open oak woodland intermixed with grassland and shrubland. We used factor analysis to identify landowner typologies based on the importance to respondents of various motivations for landownership. We then used regression models to analyze whether the identified typologies determine land and water management decisions. These decisions affect the size and distribution of shallow wetlands that provide key habitat for wildlife, particularly for the threatened California black rail (Laterallus jamaicensis coturniculus). Our results identified two typologies associated primarily with pecuniary motivations and four with nonpecuniary motivations. We also found that landowners driven by motives we termed Profit or Lifestyle were more likely to manage water-dependent areas and take actions affecting both wetlands and land uses, while those motivated by Recreation or land Investment were less likely to take any action. Property size was also a significant driver of management decisions. Our findings suggest the need for tailoring environmental schemes to different landowner typologies in the management of private rangelands.
{"title":"Do Landownership Motivations Determine Land and Water Management? A Survey of Ranchers in California Rangelands","authors":"José L. Oviedo , Lynn Huntsinger , Nathan D. Van Schmidt , Steven R. Beissinger","doi":"10.1016/j.rama.2025.09.005","DOIUrl":"10.1016/j.rama.2025.09.005","url":null,"abstract":"<div><div>Research on private ownership of rural land often draws on many factors in attempting to explain land use and management decisions, including landownership motivations. In this article, we present the results of a survey of private landowners in the Sierra Nevada foothills of Yuba, Nevada, and Butte counties (California), in a rangeland setting that is mostly open oak woodland intermixed with grassland and shrubland. We used factor analysis to identify landowner typologies based on the importance to respondents of various motivations for landownership. We then used regression models to analyze whether the identified typologies determine land and water management decisions. These decisions affect the size and distribution of shallow wetlands that provide key habitat for wildlife, particularly for the threatened California black rail (<em>Laterallus jamaicensis coturniculus</em>). Our results identified two typologies associated primarily with pecuniary motivations and four with nonpecuniary motivations. We also found that landowners driven by motives we termed <em>Profit</em> or <em>Lifestyle</em> were more likely to manage water-dependent areas and take actions affecting both wetlands and land uses, while those motivated by <em>Recreation</em> or land <em>Investment</em> were less likely to take any action. Property size was also a significant driver of management decisions. Our findings suggest the need for tailoring environmental schemes to different landowner typologies in the management of private rangelands.</div></div>","PeriodicalId":49634,"journal":{"name":"Rangeland Ecology & Management","volume":"103 ","pages":"Pages 356-366"},"PeriodicalIF":2.4,"publicationDate":"2025-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145361714","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}
Pub Date : 2025-10-16DOI: 10.1016/j.rama.2025.09.008
Luis M. Guzmán , Pablo E. Villagra , Raul E. Quiroga , Diego I. Pereyra , Martin E. Pelliza
The increase in shrub cover, driven by factors such as climate change, overgrazing, and reduced fire frequency, is a global process that is also affecting the native forests of the Arid Chaco in Argentina. One of its main effects is the reduction in the production of native and non-native grasses, which are important forage resources for extensive livestock farming. To counteract this, shrub removal practices such as roller-chopping and hand cutting are implemented, often combined with the seeding of Cenchrus ciliaris L. (buffelgrass). Despite its widespread regional application, little is known about the medium-term (5–10 years) changes these practices induce in the soil. In this study, we explored the effects of roller-chopping and hand-cutting on soil physicochemical properties. To do so, we compared plots with different land-use histories: without shrub removal (conserved woodland and degraded rangeland) and with shrub removal (roller-chopping and hand-cutting, both in degraded rangeland), across five livestock farms. We found that, compared to conserved woodland and degraded rangeland, soil mechanical resistance was higher in the removal treatments, being greatest in the hand-cutting plots, which also exhibited the highest bulk density. In both cases, these values increased with depth, showing an inverse pattern to that of conserved woodland and degraded rangeland. Similarly, we detected a lower infiltration rate in the shrub removal treatments. We found no significant differences in most soil nutrient concentrations between treatments, except for phosphorus, which showed significantly higher values in the degraded rangeland and roller chopping. The increase in soil compaction and the reduction in water infiltration in roller-chopping and hand-cutting treatments could affect key ecosystem functions, such as net primary productivity dynamics and the water and carbon cycles. This study provides key information for decision-making in the management of livestock-forestry systems, contributing to the design of vegetation interventions that are compatible with soil quality conservation.
{"title":"Shrub Removal Practices in Livestock Environments of the Argentine Arid Chaco: Changes on Soil Physicochemical Properties","authors":"Luis M. Guzmán , Pablo E. Villagra , Raul E. Quiroga , Diego I. Pereyra , Martin E. Pelliza","doi":"10.1016/j.rama.2025.09.008","DOIUrl":"10.1016/j.rama.2025.09.008","url":null,"abstract":"<div><div>The increase in shrub cover, driven by factors such as climate change, overgrazing, and reduced fire frequency, is a global process that is also affecting the native forests of the Arid Chaco in Argentina. One of its main effects is the reduction in the production of native and non-native grasses, which are important forage resources for extensive livestock farming. To counteract this, shrub removal practices such as roller-chopping and hand cutting are implemented, often combined with the seeding of <em>Cenchrus ciliaris</em> L. (buffelgrass). Despite its widespread regional application, little is known about the medium-term (5–10 years) changes these practices induce in the soil. In this study, we explored the effects of roller-chopping and hand-cutting on soil physicochemical properties. To do so, we compared plots with different land-use histories: without shrub removal (conserved woodland and degraded rangeland) and with shrub removal (roller-chopping and hand-cutting, both in degraded rangeland), across five livestock farms. We found that, compared to conserved woodland and degraded rangeland, soil mechanical resistance was higher in the removal treatments, being greatest in the hand-cutting plots, which also exhibited the highest bulk density. In both cases, these values increased with depth, showing an inverse pattern to that of conserved woodland and degraded rangeland. Similarly, we detected a lower infiltration rate in the shrub removal treatments. We found no significant differences in most soil nutrient concentrations between treatments, except for phosphorus, which showed significantly higher values in the degraded rangeland and roller chopping. The increase in soil compaction and the reduction in water infiltration in roller-chopping and hand-cutting treatments could affect key ecosystem functions, such as net primary productivity dynamics and the water and carbon cycles. This study provides key information for decision-making in the management of livestock-forestry systems, contributing to the design of vegetation interventions that are compatible with soil quality conservation.</div></div>","PeriodicalId":49634,"journal":{"name":"Rangeland Ecology & Management","volume":"103 ","pages":"Pages 319-328"},"PeriodicalIF":2.4,"publicationDate":"2025-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145323858","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}
Pub Date : 2025-10-16DOI: 10.1016/j.rama.2025.09.007
Matthew Rigge , Madelon F. Case , Scott E. Shaff , Lisa Ellsworth , Brett Bunde , Kory Postma
Vegetation treatments are frequently utilized in Western US rangelands to reduce woody plant cover in sagebrush stands threatened by increased wildfire risk and in pinyon-juniper woodlands expanding into formerly high-value sagebrush habitats. Despite widespread use of these treatments, monitoring data to evaluate long-term vegetation responses are often insufficient or absent. Long-term field experiments and remote-sensing based vegetation data may be complementary for assessing treatment effectiveness across temporal and spatial scales. The SageSTEP project experimentally implemented treatments at numerous sites across the Intermountain West and monitored the subsequent response of vegetation cover components with 15+ yr of field observations. However, while pretreatment data were collected in the year of implementation, long-term observations of pretreatment vegetation conditions are lacking in the SageSTEP database. Remote-sensing based time-series maps (1985–2023) of vegetation cover from Rangeland Condition Monitoring Assessment and Projection (RCMAP) could fill temporal gaps in monitoring data and scale findings across broader extents. We evaluate the relationship between pretreatment vegetation cover in the RCMAP data and the post-treatment response in both the RCMAP and field observations. Additionally, we explore the correspondence between SageSTEP field observations and RCMAP at various scales, and examine key factors related to the strength of relationships. Overall, SageSTEP and RCMAP data show a similar direction of treatment effect for each component, and to a lesser extent the magnitude of effect. SageSTEP and RCMAP data tended to agree most strongly where treatment effects were strong; when averaged across broader spatial scales; and for components such as tree and bare ground that are more easily distinguished spectrally. Remote sensing tools such as RCMAP, in combination with field-based climate and vegetation observations, can help assess postdisturbance recovery trajectories and facilitate regional decision-making around treatment alternatives, fire risk reduction, and protection of critical habitats.
{"title":"Correspondence Between Satellite-Derived and Long-Term Field Observations of Vegetation Cover at Great Basin Experimental Treatments","authors":"Matthew Rigge , Madelon F. Case , Scott E. Shaff , Lisa Ellsworth , Brett Bunde , Kory Postma","doi":"10.1016/j.rama.2025.09.007","DOIUrl":"10.1016/j.rama.2025.09.007","url":null,"abstract":"<div><div>Vegetation treatments are frequently utilized in Western US rangelands to reduce woody plant cover in sagebrush stands threatened by increased wildfire risk and in pinyon-juniper woodlands expanding into formerly high-value sagebrush habitats. Despite widespread use of these treatments, monitoring data to evaluate long-term vegetation responses are often insufficient or absent. Long-term field experiments and remote-sensing based vegetation data may be complementary for assessing treatment effectiveness across temporal and spatial scales. The SageSTEP project experimentally implemented treatments at numerous sites across the Intermountain West and monitored the subsequent response of vegetation cover components with 15+ yr of field observations. However, while pretreatment data were collected in the year of implementation, long-term observations of pretreatment vegetation conditions are lacking in the SageSTEP database. Remote-sensing based time-series maps (1985–2023) of vegetation cover from Rangeland Condition Monitoring Assessment and Projection (RCMAP) could fill temporal gaps in monitoring data and scale findings across broader extents. We evaluate the relationship between pretreatment vegetation cover in the RCMAP data and the post-treatment response in both the RCMAP and field observations. Additionally, we explore the correspondence between SageSTEP field observations and RCMAP at various scales, and examine key factors related to the strength of relationships. Overall, SageSTEP and RCMAP data show a similar direction of treatment effect for each component, and to a lesser extent the magnitude of effect. SageSTEP and RCMAP data tended to agree most strongly where treatment effects were strong; when averaged across broader spatial scales; and for components such as tree and bare ground that are more easily distinguished spectrally. Remote sensing tools such as RCMAP, in combination with field-based climate and vegetation observations, can help assess postdisturbance recovery trajectories and facilitate regional decision-making around treatment alternatives, fire risk reduction, and protection of critical habitats.</div></div>","PeriodicalId":49634,"journal":{"name":"Rangeland Ecology & Management","volume":"103 ","pages":"Pages 341-355"},"PeriodicalIF":2.4,"publicationDate":"2025-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145323856","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}
Pub Date : 2025-10-16DOI: 10.1016/j.rama.2025.09.006
Paulo Sérgio Ferreira da Silva , Mércia Virginia Ferreira dos Santos , Mário de Andrade Lira , Márcio Vieira da Cunha , Alexandre Carneiro Leão de Mello , André Pereira Freire Ferraz , José Carlos Batista Dubeux Jr. , Maria da Conceição Silva , Djalma Cordeiro dos Santos , Dayanne Camelo
Forage cactus is an important fodder resource for livestock in semiarid region. Understanding how morphological and productive variability and susceptibility to cochineal among cactus clones is key to select clones that are best adapted to each region. This research hypothesized that morphological and productive characteristics of forage cactus clones, as well as their susceptibility to cochineal attacks, vary significantly among genotypes and environmental conditions. The objective of this study was to evaluate morphological and productive characteristics and the presence of cochineal (Dactylopius opuntiae and Diaspis echinocacti) in six forage cactus clones in two semiarid regions, during 2 yr. The studied six clones were: F21, IPA-Sertânia and Miúda (Nopalea cochenillifera Salm-Dyck), IPA-20 [Opuntia ficus-indica (L.) Mill.], F8 (Opuntia atropes Rose), and Orelha de Elefante Mexicana (OEM) [Opuntia stricta (Haw.) Haw.] in two sites, Arcoverde (Sertão) and São Bento do Una (Agreste), Pernambuco, Brazil. The design was randomized complete block with three replications for each site. The clones F8 and Miúda showed greater height when cultivated in São Bento do Una (108 and 112 cm) than in Arcoverde (67 and 61 cm). In São Bento do Una, clones F21, IPA-Sertânia, and Miúda produced more (18, 24, and 16 Mg · DM · ha−1 2 yr) compared with Arcoverde (7, 10, and 8 Mg · DM · ha−1). Clone F8 showed complete resistance to D. opuntiae and D. echinocacti. Clone IPA-20 was most susceptible to D. opuntiae, and OEM was most susceptible to D. echinocacti. Environmental conditions significantly affected cactus productivity. Pest-resistant clones such as F8 are crucial in pest-prone areas. São Bento do Una offers more favorable conditions for forage cactus cultivation. We conclude that the OEM clone is more suitable for cultivation in Arcoverde, whereas the IPA-Sertânia clone is better suited for São Bento do Una, due to their superior dry matter production, water use efficiency, and survival rates.
草料仙人掌是半干旱区重要的家畜饲料资源。了解仙人掌无性系的形态和产量变异以及对胭脂虫的易感性是选择最适合每个地区的无性系的关键。本研究推测，不同基因型和环境条件下，饲用仙人掌无性系的形态和生产特征以及对胭脂虫的易感性存在显著差异。研究了2年半干旱区6个草食仙人掌无性系F21、ipa - sert、Miúda （Nopalea cochenillifera Salm-Dyck）和IPA-20 （Opuntia ficus-indica (L.)）的形态特征和产量特征，并对它们的存在进行了分析。轧机。], F8 （Opuntia atropes Rose）和Orelha de Elefante Mexicana (OEM) [Opuntia stricta (Haw.)]。山楂。在巴西伯南布哥省的Arcoverde （sert）和s o Bento do Una （Agreste）两个地点。设计是随机的完整块，每个位点有三个重复。无性系F8和Miúda在 o Bento do Una栽培时的株高（108和112 cm）高于Arcoverde栽培时的株高（67和61 cm）。在 o Bento do Una中，与Arcoverde（7、10和8 Mg·DM·ha−1）相比，F21、ipa - sertnia和Miúda克隆（18、24和16 Mg·DM·ha−12年）的产量更高（18、24和16 Mg·DM·ha−1）。无性系F8对机会僵菌和棘球绦虫具有完全抗性。克隆IPA-20对机会菌最敏感，克隆OEM对棘皮菌最敏感。环境条件对仙人掌产量有显著影响。F8等抗虫害无性系在害虫多发地区至关重要。o Bento do Una为牧草仙人掌的种植提供了更有利的条件。我们得出结论，OEM无性系更适合在Arcoverde种植，而ipa - sert尼亚无性系更适合在 o Bento do Una种植，因为它们具有更高的干物质产量、水分利用效率和成活率。
{"title":"Morphological, Productive, and Pest Susceptibility Characteristics of Forage Cactus Clones in Semiarid Regions of Brazil","authors":"Paulo Sérgio Ferreira da Silva , Mércia Virginia Ferreira dos Santos , Mário de Andrade Lira , Márcio Vieira da Cunha , Alexandre Carneiro Leão de Mello , André Pereira Freire Ferraz , José Carlos Batista Dubeux Jr. , Maria da Conceição Silva , Djalma Cordeiro dos Santos , Dayanne Camelo","doi":"10.1016/j.rama.2025.09.006","DOIUrl":"10.1016/j.rama.2025.09.006","url":null,"abstract":"<div><div>Forage cactus is an important fodder resource for livestock in semiarid region. Understanding how morphological and productive variability and susceptibility to cochineal among cactus clones is key to select clones that are best adapted to each region. This research hypothesized that morphological and productive characteristics of forage cactus clones, as well as their susceptibility to cochineal attacks, vary significantly among genotypes and environmental conditions. The objective of this study was to evaluate morphological and productive characteristics and the presence of cochineal (<em>Dactylopius opuntiae</em> and <em>Diaspis echinocacti</em>) in six forage cactus clones in two semiarid regions, during 2 yr. The studied six clones were: F21, IPA-Sertânia and Miúda (<em>Nopalea cochenillifera</em> Salm-Dyck), IPA-20 [<em>Opuntia ficus-indica</em> (L.) Mill.], F8 (<em>Opuntia atropes</em> Rose), and Orelha de Elefante Mexicana (OEM) [<em>Opuntia stricta</em> (Haw.) Haw.] in two sites, Arcoverde (Sertão) and São Bento do Una (Agreste), Pernambuco, Brazil. The design was randomized complete block with three replications for each site. The clones F8 and Miúda showed greater height when cultivated in São Bento do Una (108 and 112 cm) than in Arcoverde (67 and 61 cm). In São Bento do Una, clones F21, IPA-Sertânia, and Miúda produced more (18, 24, and 16 Mg · DM · ha<sup>−1</sup> 2 yr) compared with Arcoverde (7, 10, and 8 Mg · DM · ha<sup>−1</sup>). Clone F8 showed complete resistance to <em>D. opuntiae</em> and <em>D. echinocacti</em>. Clone IPA-20 was most susceptible to <em>D. opuntiae</em>, and OEM was most susceptible to <em>D. echinocacti</em>. Environmental conditions significantly affected cactus productivity. Pest-resistant clones such as F8 are crucial in pest-prone areas. São Bento do Una offers more favorable conditions for forage cactus cultivation. We conclude that the OEM clone is more suitable for cultivation in Arcoverde, whereas the IPA-Sertânia clone is better suited for São Bento do Una, due to their superior dry matter production, water use efficiency, and survival rates.</div></div>","PeriodicalId":49634,"journal":{"name":"Rangeland Ecology & Management","volume":"103 ","pages":"Pages 329-340"},"PeriodicalIF":2.4,"publicationDate":"2025-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145323857","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}
Pub Date : 2025-10-10DOI: 10.1016/j.rama.2025.08.007
Brynne E. Lazarus, Matthew J. Germino
{"title":"Corrigendum to “Risks and Rewards of Pre-emergent Herbicide (Indaziflam) to Defend Core Sagebrush-Steppe Ecosystems Under Suboptimal Precipitation” [Rangeland Ecology & Management, volume 102, September 2025, pages 153-159]","authors":"Brynne E. Lazarus, Matthew J. Germino","doi":"10.1016/j.rama.2025.08.007","DOIUrl":"10.1016/j.rama.2025.08.007","url":null,"abstract":"","PeriodicalId":49634,"journal":{"name":"Rangeland Ecology & Management","volume":"103 ","pages":"Page 318"},"PeriodicalIF":2.4,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145265996","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}
Pub Date : 2025-10-09DOI: 10.1016/j.rama.2025.08.017
Jonathan D. Bates , Kirk W. Davies , Stella M. Copeland , Rory C. O’Connor , Lauren N. Svejcar , Danielle R. Clenet
Information on the effects of long-term cattle grazing at different intensities on herbage production following fire in the sagebrush steppe is lacking. We measured herbaceous biomass response to cattle grazing spanning 18 yr (2007–2024) on burned Wyoming big sagebrush (Artemisia tridentata Nutt. ssp. wyomingensis Beetle & Young) steppe in eastern Oregon. Treatments were applied in a randomized complete block design, including no grazing on burned (nonuse) and unburned (control) sagebrush steppe; and cattle grazing at low (low), moderate (moderate), and high (high) stocking. All grazed treatments were by deferred rotation. Deferred rotation consisted of grazing during the active growing season (mid-May–early June) once every 3 yr followed by 2 yr of grazing during summer herbaceous dormancy (July, August, or September). Herbage was sorted by herbaceous functional group, which included an early season bunchgrass (Sandberg bluegrass [Poa secunda J. Presl]), tall perennial bunchgrasses, perennial forbs, cheatgrass (Bromus tectorum L.), and annual forbs. Both standing crop and annual net primary production (ANPP, current year’s growth) of functional groups were evaluated by repeated measures analysis. Standing crop decreased as grazing intensity increased but recovered with 1 or 2 yr of grazing rest. Herbaceous functional group ANPP did not differ among the burned treatments (grazed and nonuse), and total and perennial bunchgrass production were all greater than the control. Grazing intensity in the deferred rotation program did not affect long-term ANPP. Annual weather events account for ANPP variability measured for the various grazed and ungrazed treatments.
关于不同强度的长期放牧对山艾草草原火灾后牧草生产影响的信息缺乏。我们测量了18年（2007-2024）放牧对燃烧的怀俄明大艾草（Artemisia tridentata Nutt）草本生物量的响应。ssp。怀俄明州：俄勒冈州东部的甲虫大草原。处理采用随机完全区组设计，包括不放牧烧伤（未使用）和未烧伤（对照）的山艾草草原；牛在低（低）、中（中）、高（高）放养时放牧。所有放牧处理均采用延期轮作。延期轮作包括在活跃生长季节（5月中旬至6月初）每3年放牧一次，然后在夏季草本休眠期（7月、8月或9月）放牧2年。牧草按草本功能类群进行分类，包括早季束草（Sandberg bluegrass [Poa secunda J. Presl]）、多年生高大束草、多年生草本、腐草（Bromus tectorum L.）和一年生草本。采用重复测量法对各官能团的立木产量和年净初级产量（ANPP，当年生长量）进行了评价。随着放牧强度的增加，林分作物数量减少，休牧1 ~ 2年后恢复。草本功能组ANPP在不同焚烧处理（放牧和不放牧）间无显著差异，总堆草产量和多年生堆草产量均大于对照。延期轮作方案的放牧强度对长期ANPP没有影响。年气候事件解释了不同放牧和未放牧处理的ANPP变率。
{"title":"Effects of Long-Term Grazing at Different Intensities on Herbaceous Biomass in Southeast Oregon Sagebrush Steppe","authors":"Jonathan D. Bates , Kirk W. Davies , Stella M. Copeland , Rory C. O’Connor , Lauren N. Svejcar , Danielle R. Clenet","doi":"10.1016/j.rama.2025.08.017","DOIUrl":"10.1016/j.rama.2025.08.017","url":null,"abstract":"<div><div>Information on the effects of long-term cattle grazing at different intensities on herbage production following fire in the sagebrush steppe is lacking. We measured herbaceous biomass response to cattle grazing spanning 18 yr (2007–2024) on burned Wyoming big sagebrush (<em>Artemisia tridentata</em> Nutt. ssp. <em>wyomingensis</em> Beetle & Young) steppe in eastern Oregon. Treatments were applied in a randomized complete block design, including no grazing on burned (nonuse) and unburned (control) sagebrush steppe; and cattle grazing at low (low), moderate (moderate), and high (high) stocking. All grazed treatments were by deferred rotation. Deferred rotation consisted of grazing during the active growing season (mid-May–early June) once every 3 yr followed by 2 yr of grazing during summer herbaceous dormancy (July, August, or September). Herbage was sorted by herbaceous functional group, which included an early season bunchgrass (Sandberg bluegrass [<em>Poa secunda</em> J. Presl]), tall perennial bunchgrasses, perennial forbs, cheatgrass (<em>Bromus tectorum</em> L.), and annual forbs. Both standing crop and annual net primary production (ANPP, current year’s growth) of functional groups were evaluated by repeated measures analysis. Standing crop decreased as grazing intensity increased but recovered with 1 or 2 yr of grazing rest. Herbaceous functional group ANPP did not differ among the burned treatments (grazed and nonuse), and total and perennial bunchgrass production were all greater than the control. Grazing intensity in the deferred rotation program did not affect long-term ANPP. Annual weather events account for ANPP variability measured for the various grazed and ungrazed treatments.</div></div>","PeriodicalId":49634,"journal":{"name":"Rangeland Ecology & Management","volume":"103 ","pages":"Pages 307-317"},"PeriodicalIF":2.4,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145265995","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}
Pub Date : 2025-10-09DOI: 10.1016/j.rama.2025.09.003
Devan Allen McGranahan
Wildfire is occurring more frequently in areas identified as wildland-urban interface (WUI), where natural vegetation meets or mixes with the human built environment. Although understanding of the spatial extent of WUI has been expanded to include rural areas and rangeland ecosystems, products that identify WUI based on the location of homes and other buildings appear to miss components of the built environment that dominate these unconventional locations, specifically, energy production structures (e.g., petroleum wells, wind turbines, solar arrays, and geothermal plants). This study describes the spatial distribution and density of energy production areas in the US Interior West, summarizes the land cover and current WUI designations within energy production areas, and describes historical wildfire activity within energy production areas by state. An analysis of a combination of publicly available geospatial data identified a 2 022 201 km2 energy production footprint comprised of 1 220 347 individual energy production structures. Only 6% of the footprint is currently designated as WUI, and 67% of the footprint is comprised of rangeland. Four out of the five states with the largest energy production footprint have also experienced the greatest historical wildfire activity within the energy production areas, suggesting these structures are at risk of fast-spreading wildfire through rangeland fuels. Despite the fire risk to energy production assets and the challenges energy infrastructure might pose to emergency managers, there is a paucity of research or resources addressing these changes within rural landscapes.
{"title":"Energy Infrastructure as Built Environment in Rural Rangelands of the US Interior West","authors":"Devan Allen McGranahan","doi":"10.1016/j.rama.2025.09.003","DOIUrl":"10.1016/j.rama.2025.09.003","url":null,"abstract":"<div><div>Wildfire is occurring more frequently in areas identified as wildland-urban interface (WUI), where natural vegetation meets or mixes with the human built environment. Although understanding of the spatial extent of WUI has been expanded to include rural areas and rangeland ecosystems, products that identify WUI based on the location of homes and other buildings appear to miss components of the built environment that dominate these unconventional locations, specifically, energy production structures (e.g., petroleum wells, wind turbines, solar arrays, and geothermal plants). This study describes the spatial distribution and density of energy production areas in the US Interior West, summarizes the land cover and current WUI designations within energy production areas, and describes historical wildfire activity within energy production areas by state. An analysis of a combination of publicly available geospatial data identified a 2 022 201 km<sup>2</sup> energy production footprint comprised of 1 220 347 individual energy production structures. Only 6% of the footprint is currently designated as WUI, and 67% of the footprint is comprised of rangeland. Four out of the five states with the largest energy production footprint have also experienced the greatest historical wildfire activity within the energy production areas, suggesting these structures are at risk of fast-spreading wildfire through rangeland fuels. Despite the fire risk to energy production assets and the challenges energy infrastructure might pose to emergency managers, there is a paucity of research or resources addressing these changes within rural landscapes.</div></div>","PeriodicalId":49634,"journal":{"name":"Rangeland Ecology & Management","volume":"103 ","pages":"Pages 302-306"},"PeriodicalIF":2.4,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145265993","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}
Pub Date : 2025-10-08DOI: 10.1016/j.rama.2025.08.006
Kyle A. Cook , Brad Geary , Phil S. Allen , April Hulet , Kevin L. Gunnell , Melissa Landeen , Shannon V. Nelson , Sage K. Johansen , Colin T. Mckee , Matthew D. Madsen
Direct seeding of native plant species is a widespread technique in rangeland restoration; however, its efficacy can be limited by numerous factors. Restoration of winterfat (Krascheninnikovia lanata) may be constrained by poor seed flowability and premature seed germination that can cause overwinter mortality of fall-sown seeds. Hydrophobic seed coatings may be effective in addressing these barriers. We compared seedling emergence from seeds that were left uncoated, coated with calcium carbonate (blank coated), and coated with calcium carbonate plus an exterior hydrophobic coating. Total seedlings were counted and assigned as dead or alive. This total seedling count was used to estimate mortality for each treatment. Seeds were planted in the fall of 2021 at two sites within the Great Basin Region of the United States. The number of seedlings that emerged from hydrophobic-coated seeds was three-fold greater than that of noncoated seeds and five-fold greater than that of blank-coated seeds. The percentage of seedlings that died after emerging was highest for noncoated seeds and lowest for those with hydrophobic coatings. These results suggest that coating alone may not improve seeding success, but coating seeds with a hydrophobic polymer to delay germination can improve seedling emergence of winterfat. Thus, seed coatings could play a crucial role in restoring winterfat to degraded rangelands.
{"title":"Improving Winterfat Seedling Emergence Using Hydrophobic Seed Coatings","authors":"Kyle A. Cook , Brad Geary , Phil S. Allen , April Hulet , Kevin L. Gunnell , Melissa Landeen , Shannon V. Nelson , Sage K. Johansen , Colin T. Mckee , Matthew D. Madsen","doi":"10.1016/j.rama.2025.08.006","DOIUrl":"10.1016/j.rama.2025.08.006","url":null,"abstract":"<div><div>Direct seeding of native plant species is a widespread technique in rangeland restoration; however, its efficacy can be limited by numerous factors. Restoration of winterfat (<em>Krascheninnikovia lanata</em>) may be constrained by poor seed flowability and premature seed germination that can cause overwinter mortality of fall-sown seeds. Hydrophobic seed coatings may be effective in addressing these barriers. We compared seedling emergence from seeds that were left uncoated, coated with calcium carbonate (blank coated), and coated with calcium carbonate plus an exterior hydrophobic coating. Total seedlings were counted and assigned as dead or alive. This total seedling count was used to estimate mortality for each treatment. Seeds were planted in the fall of 2021 at two sites within the Great Basin Region of the United States. The number of seedlings that emerged from hydrophobic-coated seeds was three-fold greater than that of noncoated seeds and five-fold greater than that of blank-coated seeds. The percentage of seedlings that died after emerging was highest for noncoated seeds and lowest for those with hydrophobic coatings. These results suggest that coating alone may not improve seeding success, but coating seeds with a hydrophobic polymer to delay germination can improve seedling emergence of winterfat. Thus, seed coatings could play a crucial role in restoring winterfat to degraded rangelands.</div></div>","PeriodicalId":49634,"journal":{"name":"Rangeland Ecology & Management","volume":"103 ","pages":"Pages 288-294"},"PeriodicalIF":2.4,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145265991","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}
Pub Date : 2025-10-08DOI: 10.1016/j.rama.2025.09.001
Benjamin Menapace , Miranda Meehan , Garret Hecker , Peter O’Brien
State and transition models (STMs) are used by landowners to make land management decisions by providing insight into the processes that govern degradation and recovery of ecosystems. Intensive monitoring and inclusion of long-term data is critical for an advanced understanding of riparian ecosystem dynamics and stream channel morphology. This study used repeated measures of stream channel morphology on intermittent streams in low gradient alluvial valleys to assess transitions for improved riparian STM development. Cross sectional and longitudinal surveys of channel morphology were conducted five to seven years apart. Each site was assigned a channel type and stability class so transitions between classifications could be compared. Analysis of multiple channel stability metrics and the multivariate trajectory of sites over time revealed general trends toward stability across the study area. Channels that were initially observed in a stabilizing state and channels that changed stability class had the greatest degree of change over time. This study supports the theory that destabilized channels will always seek an alternative stable state. Stabilizing channels are in a state of building resistance and resilience. Management of stabilizing channels should include practices that promote floodplain development through the establishment of riparian plant communities. This study provides context for the length of time that the stages of channel evolution take on intermittent streams in the Northern Great Plains. Managers are able to make well informed decisions when provided with a time frame for the changes a management practice is expected to support.
{"title":"Providing Temporal Context to Channel Morphological Dynamics in Great Plains Intermittent Streams","authors":"Benjamin Menapace , Miranda Meehan , Garret Hecker , Peter O’Brien","doi":"10.1016/j.rama.2025.09.001","DOIUrl":"10.1016/j.rama.2025.09.001","url":null,"abstract":"<div><div>State and transition models (STMs) are used by landowners to make land management decisions by providing insight into the processes that govern degradation and recovery of ecosystems. Intensive monitoring and inclusion of long-term data is critical for an advanced understanding of riparian ecosystem dynamics and stream channel morphology. This study used repeated measures of stream channel morphology on intermittent streams in low gradient alluvial valleys to assess transitions for improved riparian STM development. Cross sectional and longitudinal surveys of channel morphology were conducted five to seven years apart. Each site was assigned a channel type and stability class so transitions between classifications could be compared. Analysis of multiple channel stability metrics and the multivariate trajectory of sites over time revealed general trends toward stability across the study area. Channels that were initially observed in a stabilizing state and channels that changed stability class had the greatest degree of change over time. This study supports the theory that destabilized channels will always seek an alternative stable state. Stabilizing channels are in a state of building resistance and resilience. Management of stabilizing channels should include practices that promote floodplain development through the establishment of riparian plant communities. This study provides context for the length of time that the stages of channel evolution take on intermittent streams in the Northern Great Plains. Managers are able to make well informed decisions when provided with a time frame for the changes a management practice is expected to support.</div></div>","PeriodicalId":49634,"journal":{"name":"Rangeland Ecology & Management","volume":"103 ","pages":"Pages 295-301"},"PeriodicalIF":2.4,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145265992","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}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号