Global Ecology and Conservation最新文献_第2页

Bald Eagle home range size and core-use areas in an urbanizing landscape 秃鹰家园规模和核心使用区域处于城市化景观之中

IF 3.4 2区环境科学与生态学 Q1 BIODIVERSITY CONSERVATION

Global Ecology and Conservation

Pub Date : 2026-01-19 DOI: 10.1016/j.gecco.2026.e04079

Miranda Middleton , Reesa Yale Conrey , Nicolas Jaffe , Liba Pejchar

Urbanization has contributed to the decline of many wildlife species through habitat loss. To examine how Bald Eagles (Haliaeetus leucocephalus) respond to urbanization we used dynamic Brownian bridge movement models to estimate home range size and core-use areas of 24 territorial Bald Eagles affixed with GPS/GSM transmitters during five different stages of the annual cycle. We then used a mixed-effects linear regression model to identify the land cover characteristics associated with home range size and core-use areas. We found that Bald Eagle home ranges and core-use areas varied in size and were often discontinuous. Home ranges and core-use areas tended to be larger during the pre-nesting and non-nesting stages and smaller during the nestling and post-fledge stages, with these differences being more pronounced in females. Home ranges and core-use areas were smaller in areas containing more water and lower canopy cover. Home ranges, but not core-use areas, were also smaller in areas containing higher amounts of herbaceous wetlands. Home range size was not strongly associated with impervious cover, a metric of human development intensity, but core-use area size increased with impervious cover. Eagle core-use areas did not contain more than an average of 39 % impervious cover, defined as low development intensity by the U.S. Geological Survey. In our study, home ranges covered areas with higher levels of impervious surface compared to core-use areas, demonstrating that while eagles will inhabit areas with moderate levels of development, they concentrate their use in areas with lower levels of development. These findings suggest that Bald Eagles can use urbanizing landscapes, but care should be taken to protect key nesting and foraging sites from high density development.

由于栖息地的丧失，城市化导致了许多野生动物物种的减少。为了研究白头海雕（halaeetus leucocephalus）对城市化的反应，我们使用动态布朗桥运动模型来估计24只在每年周期的五个不同阶段安装了GPS/GSM发射机的秃鹰的活动范围和核心使用区域。然后，我们使用混合效应线性回归模型来识别与家园范围大小和核心使用区域相关的土地覆盖特征。我们发现秃鹰的家园范围和核心使用区域大小不一，而且经常不连续。巢前和非巢期的家范围和核心利用区较大，而雏鸟和羽翼后的家范围和核心利用区较小，这种差异在雌鸟中更为明显。在水分较多和冠层覆盖较低的地区，家园范围和核心利用区域较小。在草本湿地数量较多的地区，主要活动范围也较小，而不是核心利用区域。家园范围大小与人类发展强度指标不透水覆盖度密切相关，但核心利用面积大小随着不透水覆盖度的增加而增加。Eagle核心使用区域的不透水覆盖率平均不超过39% %，美国地质调查局将其定义为低开发强度。在我们的研究中，与核心使用区域相比，家园范围覆盖了更高水平的不透水表面，这表明尽管鹰会居住在中等发展水平的地区，但它们会集中在发展水平较低的地区使用。这些发现表明，秃鹰可以利用城市化的景观，但应注意保护关键的筑巢和觅食地点免受高密度发展的影响。

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引用次数: 0

A model-based decision support framework for siting communication tower infrastructure to reduce adverse effects on a sagebrush-obligate species 基于模型的通信塔基础设施选址决策支持框架，以减少对山艾树专性物种的不利影响

IF 3.4 2区环境科学与生态学 Q1 BIODIVERSITY CONSERVATION

Global Ecology and Conservation

Pub Date : 2026-01-19 DOI: 10.1016/j.gecco.2026.e04078

Sarah C. Webster , Shawn T. O’Neil , Shawn Szabo , Jacqueline B. Cupples , Jonathan B. Dinkins , Steve Abele , Jennifer M. Hill , John C. Tull , Peter S. Coates

The ongoing expansion of human enterprise into remote environments has contributed to degradation and fragmentation of ecosystems globally, reducing plant and animal species’ habitats and viability. Western North America’s sagebrush ecosystems have been reduced to half the area of their historical range, largely driven by anthropogenic activities. A relatively recent advancement has been the rapid construction of wireless communication infrastructure. While modern communication technology is essential for economic progress and critical to rural communities, its associated infrastructure may have undesired influences on sagebrush ecosystems and associated wildlife. These influences, along with their potential remediation to benefit species conservation, are poorly understood. We investigated the effects of communication tower infrastructure over 25 years (1996–2020) on the greater sage-grouse (Centrocercus urophasianus; hereafter, sage-grouse), a species of conservation concern often considered to be an indicator for the health of sagebrush ecosystems. We used hierarchical population state-space models coupled with male lek counts to investigate spatiotemporal effects of towers on sage-grouse annual rate of change (

\hat{λ}

) in apparent abundance while considering influences of other anthropogenic infrastructure and environmental characteristics at multiple spatial scales. Both tower density and proximity were negatively related to

\hat{λ}

at distances up to 12.5 km away from tower sites. Higher elevation and sagebrush cover positively influenced

\hat{λ}

while tree cover and annual grass cover exhibited negative associations. We used model results to inform a decision support framework that could guide location siting of future communication infrastructure based on minimization of effects to sage-grouse populations. Increases in communication tower infrastructure was one of the factors contributing to a ∼1.6 % overall decrease in expected

\hat{λ}

during the study, but simulations demonstrated how placing infrastructure away from sage-grouse breeding areas could minimize negative effects. Our findings, coupled with decision support analyses, can help inform local, regional, and national conservation strategies that seek to minimize or mitigate undesired effects of communication infrastructure.

人类活动不断向偏远环境扩张，造成了全球生态系统的退化和破碎化，减少了动植物物种的栖息地和生存能力。北美西部的山艾树生态系统已经减少到其历史范围的一半，主要是由人为活动造成的。无线通信基础设施的快速建设是一个相对较新的进展。虽然现代通信技术对经济进步至关重要，对农村社区至关重要，但与之相关的基础设施可能对山艾树生态系统和相关野生动物产生不良影响。这些影响，以及它们对物种保护的潜在补救措施，人们知之甚少。我们调查了25年来（1996-2020年）通信塔基础设施对大鼠尾草（Centrocercus urophasianus；以下简称为大鼠尾草）的影响，大鼠尾草是一种受保护的物种，通常被认为是鼠尾草生态系统健康的一个指标。在考虑其他人为基础设施和环境特征在多个空间尺度上的影响的情况下，采用分层种群状态-空间模型，结合雄性lek计数，研究了高塔对鼠尾草年变化率（λ -）的时空效应。在距离塔址12.5 km以内，塔密度和接近度都与λ - δ呈负相关。较高海拔和山艾树盖度正影响λ↓，而乔木盖度和年草盖度呈负相关。我们使用模型结果为决策支持框架提供信息，该框架可以指导基于对鼠尾草种群影响最小化的未来通信基础设施的选址。在研究期间，通信塔基础设施的增加是导致预期λ δ总体下降约1.6%的因素之一，但模拟表明，如何将基础设施置于远离鼠尾草繁殖区的地方可以最大限度地减少负面影响。我们的研究结果与决策支持分析相结合，可以帮助为地方、区域和国家保护战略提供信息，以尽量减少或减轻通信基础设施的不良影响。

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引用次数: 0

Frog vocal responses to thermal variation in Hainan tropical rainforests 海南热带雨林蛙声对热变化的响应

IF 3.4 2区环境科学与生态学 Q1 BIODIVERSITY CONSERVATION

Global Ecology and Conservation

Pub Date : 2026-01-19 DOI: 10.1016/j.gecco.2026.e04077

Longhui Zhao , Jiayi Jian , Haixia Long , Jichao Wang

Amphibians, the most threatened vertebrate group, are particularly vulnerable to temperature changes due to their ectothermic nature, but the impact of distinct thermal environments on their calling behaviors remains unclear. In this study, we used a combination of human-based field surveys and passive acoustic monitoring (PAM) techniques to investigate the calling behaviors of four anurans (Microhyla fissipes, Leptobrachium hainanensis, Hylarana guentheri, and Amolops torrentis) within the confines of the Hainan Tropical Rainforest National Park. We also examined the relationship between this behavior and daily temperature fluctuations in these species. The results showed that four anurans had temporal partitioning in daily calling activities. All species exhibited a narrow preferred temperature range for calling: M. fissipes, L. hainanensis, and H. guentheri preferred [24/25°C, 29°C), while A. torrentis preferred [23°C, 26°C). The calling count of L. hainanensis was unaffected by environmental temperature; however, the calling activity of the other three species either increased or decreased as temperatures rose. Furthermore, temperature had no impact on the call durations of two terrestrial species (M. fissipes and L. hainanensis), but had a significant influence on those of two water species (H. guentheri and A. torrentis). These results suggest that four anurans are sensitive to changes in the environmental temperature and respond differently to daily temperature variations. This study enhances our understanding of how poikilothermic animals’ vocalisations respond to specific thermal environments and provides insights into the impact of global warming on amphibians.

两栖动物是最受威胁的脊椎动物，由于它们的恒温特性，它们特别容易受到温度变化的影响，但不同的热环境对它们的呼叫行为的影响尚不清楚。本研究采用人工实地调查和被动声监测相结合的方法，对海南热带雨林国家公园内的4种无尾动物（Microhyla fissipes、Leptobrachium hainanensis、Hylarana guentheri和Amolops torrentis）的鸣叫行为进行了研究。我们还研究了这些物种的这种行为与每日温度波动之间的关系。结果表明，4只无尾猿在日常鸣叫活动中存在时间分异现象。所有物种均表现出较窄的鸣叫温度偏好范围，裂裂棘猴、海南棘猴和guentheri的鸣叫温度偏好范围为24/25°C， 29°C，而种子棘猴的鸣叫温度偏好范围为23°C， 26°C。海南羊草的鸣叫次数不受环境温度的影响；然而，其他三种的鸣叫活动随着温度的升高而增加或减少。此外，温度对两种陆生物种（M. fissipes和L. hainanensis）的通话时间没有影响，但对两种水生物种（H. guentheri和a . torrentis）的通话时间有显著影响。这些结果表明，四种动物对环境温度变化敏感，对日温度变化的响应不同。这项研究增强了我们对变暖动物如何对特定的热环境做出反应的理解，并为全球变暖对两栖动物的影响提供了见解。

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引用次数: 0

Imperilled paws: How conservation biologists can use pet cats’ health and welfare rather than their impacts on wildlife to argue for their containment 濒危的爪子：保护生物学家如何利用宠物猫的健康和福利，而不是它们对野生动物的影响，来为它们的控制辩护

IF 3.4 2区环境科学与生态学 Q1 BIODIVERSITY CONSERVATION

Global Ecology and Conservation

Pub Date : 2026-01-17 DOI: 10.1016/j.gecco.2026.e04067

Michael C. Calver , Heather M. Crawford , Christopher A. Lepczyk , Duncan E. Farrow , Patricia A. Fleming

Debating impacts of owned cats Felis catus on wildlife diverts attention from improving cat health and welfare, which may also protect wildlife. We present a narrative review of the health and welfare consequences of indoor or outdoor cat husbandry. Roaming cats, especially young males, face substantial risks of traumatic injury and infectious disease, plus lesser risks of poisoning and abuse. A cat may die 10 or more years prematurely, while the cohort of outdoor cats has approximately 70–80 % of the lifespan of the cohort of indoor cats. Owners also incur veterinary expenses for injuries to roaming pets, which sometimes cause lifelong, chronic conditions. There are also data-based claims for greater quality of life for contained cats, plus more satisfying bonds between cats and owners. Containment, however, may cause obesity, diabetes or behavioural problems, while solutions including environmental enrichment, exercise, and correct feeding, plus containment logistics, may strain owners’ time and finances. Contained cats are also unlikely to express all cat behaviour. We conclude that, based on health and welfare, the advantages of containment are considerable and the disadvantages often remediable. This conclusion supports existing arguments that including health and welfare in husbandry decisions benefits cats and wildlife conservation.

争论养猫对野生动物的影响转移了人们对改善猫的健康和福利的关注，这也可能保护野生动物。我们提出的健康和福利后果的叙述回顾室内或室外猫饲养。流浪猫，特别是年轻的公猫，面临着巨大的创伤性伤害和传染病风险，加上较小的中毒和虐待风险。一只猫可能会过早死亡10年或更长时间，而户外猫的寿命大约是室内猫的70 - 80% %。主人还会为流浪宠物受伤支付兽医费用，这有时会导致终身的慢性疾病。也有基于数据的声称，被关在笼子里的猫的生活质量更高，而且猫和主人之间的关系更令人满意。然而，封闭可能会导致肥胖、糖尿病或行为问题，而解决方案包括环境丰富、锻炼、正确喂养，加上封闭后勤，可能会给业主带来时间和资金上的压力。被封闭的猫也不太可能表达所有的猫的行为。我们的结论是，基于健康和福利，遏制的好处是相当大的，缺点往往是可以补救的。这一结论支持了现有的观点，即在饲养决策中考虑健康和福利对猫和野生动物保护有益。

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引用次数: 0

Climate-driven distribution shifts of Japanese flying squid (Todarodes pacificus) and its implication for fisheries 气候驱动的日本飞鱿鱼分布变化及其对渔业的影响

IF 3.4 2区环境科学与生态学 Q1 BIODIVERSITY CONSERVATION

Global Ecology and Conservation

Pub Date : 2026-01-16 DOI: 10.1016/j.gecco.2026.e04074

Yue Jin , Yunlong Chen , Qiang Wu , Qingpeng Han , Yongqiang Shi , Xianshi Jin , Xiujuan Shan

Climate change is reshaping marine ecosystems worldwide, yet its effects on some oceanic squid species remain understudied despite their ecological and economic importance. The Japanese flying squid, Todarodes pacificus, a key neritic-oceanic species in the Northwest Pacific, has shown regionally divergent catch trends in recent decades. While such patterns may be influenced by multiple factors, one of which is whether climate change has altered the species suitable habitat and distribution. Therefore, this study, using ensemble species distribution model (SDM) calibrated with presence-only data and environmental variables, assessed whether climate-driven habitat shifts explain divergent spatial patterns. We applied eleven SDM algorithms and selected high-performing models, then ensembled the selected models to project the species distribution under current condition and future climate scenarios (SSP126, SSP245, SSP585) across three timeframes (2030s, 2060s, 2090s). Sea surface salinity and temperature were the strongest determinants of habitat suitability, with the squid favoring waters below ∼33.5 psu and temperatures between ∼11–22 °C. Projections consistently showed a marked contraction of suitable habitat, particularly in the Sea of Japan and the Pacific coast around Japan, with limited poleward expansion. Our results highlight the East China Sea and Yellow Sea as potential climate refugia of T. pacificus. Furthermore, it underscores the importance of adaptive, region-specific fisheries management in a warming ocean and demonstrate its implication for fisheries to enhance resilience strategies for migratory marine species under global change.

气候变化正在重塑世界范围内的海洋生态系统，然而其对一些海洋鱿鱼物种的影响仍未得到充分研究，尽管它们具有生态和经济重要性。日本飞鱿鱼，太平洋飞鱿鱼，是西北太平洋的一种重要的海栖物种，在最近几十年里显示出了不同地区的捕捞趋势。虽然这种模式可能受到多种因素的影响，其中之一是气候变化是否改变了物种适合的栖息地和分布。因此，本研究利用仅存在数据和环境变量校准的集合物种分布模型（SDM）来评估气候驱动的栖息地变化是否解释了不同的空间格局。采用11种SDM算法，并选择了性能较好的模型，对SSP126、SSP245、SSP585 3种气候情景（2030年代、2060年代和2090年代）下的物种分布进行了综合预测。海水表面盐度和温度是栖息地适宜性的最强决定因素，鱿鱼喜欢低于~ 33.5 psu和温度在~ 11-22°C之间的水域。预测一致显示，适合的栖息地明显缩小，特别是在日本海和日本周围的太平洋沿岸，向极地的扩张有限。结果表明，东海和黄海是太平洋T. pacificus潜在的气候避难所。此外，它强调了在变暖的海洋中适应性、区域特异性渔业管理的重要性，并论证了其对渔业在全球变化下加强洄游海洋物种恢复力战略的意义。

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引用次数: 0

Navigating challenges and opportunities in predator rewilding: Perspectives from the recolonization of Eurasian Otters (Lutra lutra) in Norway 从挪威欧亚水獭（Lutra Lutra）再定居的角度看捕食者再野生化的挑战和机遇

IF 3.4 2区环境科学与生态学 Q1 BIODIVERSITY CONSERVATION

Global Ecology and Conservation

Pub Date : 2026-01-15 DOI: 10.1016/j.gecco.2026.e04066

Erlend M. Hanssen , Robert J. Lennox , Knut Wiik Vollset , Gaute Velle , Jiska van Dijk , Lene K. Sortland , Rose Keller , Oddgeir Andersen , Sigrid Engen , Frank N. Rosell , Steven Guidos , David N. Carss , Morgan L. Piczak , Marius Kambestad

Rewilding predatory species has the potential to induce intricate trophic cascades and elicit multifaceted outcomes at biological and societal levels. The primary goal of rewilding is to restore ecological functionality and elevate species populations. However, the ecological interactions and socio-economic conflicts that emerge from rewilding are often underexplored in the literature. Natural recolonization of Eurasian otters (Lutra lutra) in Norway is presented as a paradigmatic example of historic and novel conflicts and interactions across ecological and socio-economic domains that ensue after predator recovery. Expanding otter populations in Norway have already led to increased incidences of human-wildlife conflicts because of predation on endangered Atlantic salmon (Salmo salar) and seabird species, sometimes leading to the persecution of otters. The resulting tensions have created polarized views among conservation advocates and other stakeholder groups, including anglers, local river management organizations, eiderdown harvesters, and the aquaculture industry. Emblematic of many challenges confronted by practitioners of rewilding and restoration, we use the Norwegian case study to propose adaptive management strategies to mitigate these conflicts and promote coexistence, such as humane removal or translocation of otters, use of repellents or exclusion structures, habitat restoration, and compensation payments for losses. We also highlight knowledge gaps and emerging challenges to direct future research for conflict mitigation. Our findings can guide predator rewilding schemes more broadly; although focused on otters in Norway, this perspective offers general learning points and strategies for evidence-based management of predator recovery and human-wildlife interactions globally.

野化掠食性物种有可能诱发复杂的营养级联，并在生物和社会层面引发多方面的后果。野化的主要目的是恢复生态功能，提高物种数量。然而，从野生化中产生的生态相互作用和社会经济冲突在文献中往往没有得到充分的探讨。挪威欧亚水獭（Lutra Lutra）的自然再定居是捕食者恢复后随之而来的生态和社会经济领域的历史和新的冲突和相互作用的范例。挪威水獭数量的增加已经导致人类与野生动物冲突的发生率增加，因为它们捕食濒临灭绝的大西洋鲑鱼（Salmo salar）和海鸟物种，有时会导致水獭受到迫害。由此产生的紧张关系在保护倡导者和其他利益相关者团体（包括垂钓者、当地河流管理组织、羽绒收获者和水产养殖业）之间产生了两极分化的观点。作为再野生化和恢复从业者所面临的诸多挑战的象征，我们利用挪威的案例研究提出了适应性管理策略，以减轻这些冲突并促进共存，例如人道地移走或转移水獭，使用驱蚊剂或隔离结构，栖息地恢复，以及赔偿损失。我们还强调了知识差距和新出现的挑战，以指导未来的缓解冲突研究。我们的发现可以更广泛地指导捕食者的野生化计划；虽然这一观点关注的是挪威的水獭，但它为全球范围内捕食者恢复和人类与野生动物相互作用的循证管理提供了一般的学习点和策略。

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引用次数: 0

A pathway to biodiversity-friendly, sustainable cashmere production under climate change 一条在气候变化下实现生物多样性友好、可持续羊绒生产的途径

IF 3.4 2区环境科学与生态学 Q1 BIODIVERSITY CONSERVATION

Global Ecology and Conservation

Pub Date : 2026-01-13 DOI: 10.1016/j.gecco.2026.e04069

Yasuhiro Kubota , Takayuki Shiono , Kenji Watanabe , Buntarou Kusumoto , Shogo Ikari

Nature-related risks of cashmere production in the Eurasian continent was evaluated by spatial dynamics of grassland biomass and biodiversity: especially in Inner Mongolia, the analyses combining satellite remote sensing of vegetation and stacked species distribution modeling revealed that priority areas of biodiversity conservation and suitable areas for cashmere goat herding shifted dramatically during 2000–2022. A grazing scenario ensuring minor reduction in grassland biomass and plant species richness could be implemented under the condition of less than 10 goats per hectare in the grasslands with more than 400 mm annual precipitation. In conclusion, suitable grazing areas and goat density for biodiversity-friendly, sustainable production should be determined adaptively according to the dynamics of grassland biomass and species richness, which was governed by shifting biome from cold deserts to grasslands, grassland to shrub lands, and/or shrub lands to grasslands, in response to climate change involving high rainfall and drought.

利用欧亚大陆草地生物量和生物多样性的空间动态分析，对欧亚大陆羊绒生产的自然相关风险进行了评估：特别是内蒙古，结合植被卫星遥感和堆叠物种分布模型的分析表明，2000-2022年期间，生物多样性保护优先区和羊绒山羊适宜区发生了显著变化。在年降水量大于400 mm的草地上，在每公顷少于10只山羊的条件下，可以实现确保草地生物量和植物物种丰富度小幅减少的放牧情景。综上所述，为应对高降雨和干旱的气候变化，应根据草原生物量和物种丰富度的动态变化，从寒冷的荒漠向草原、草地向灌丛地和/或灌丛地向草原的转变，自适应地确定适合生物多样性友好型可持续生产的牧区和山羊密度。

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引用次数: 0

Fish diversity and invasive species detection in the Perak River, Malaysia, through eDNA metabarcoding 利用eDNA元条形码检测马来西亚霹雳河鱼类多样性及入侵物种

IF 3.4 2区环境科学与生态学 Q1 BIODIVERSITY CONSERVATION

Global Ecology and Conservation

Pub Date : 2026-01-13 DOI: 10.1016/j.gecco.2026.e04070

Ghazanfer Ali , Subha Bhassu , Jiao Yang , Thenmoli AP Govindasamy , Norhafiza Mohd Arshad , Lavanya Vythalingam , Satoshi Nagai

Freshwater ecosystems are among the most threatened globally, facing rapid biodiversity declines due to habitat degradation, pollution, overexploitation, and invasive species introductions. Southeast Asia, recognized as a global freshwater biodiversity hotspot, is experiencing some of the highest extinction risks. The Perak River, Malaysia’s second-longest river, supports diverse fish communities critical for regional ecological stability and food security, but comprehensive biodiversity assessments have been lacking. This study used environmental DNA (eDNA) metabarcoding targeting the 12S rRNA gene to comprehensively assess fish diversity and detect invasive species across the Perak River. Water samples from five locations were analyzed using high-throughput sequencing on the Illumina MiSeq platform. We identified 16 orders, 32 families, 51 genera, and 57 species, with Cyprinidae being the dominant family (15.78 % of species). Invasive species such as Micropterus salmoides, Oreochromis spp., and Gambusia affinis recognised as invasive either globally or in Malaysia were also detected, raising ecological concerns. Our results highlight the efficiency of eDNA metabarcoding for non-invasive biodiversity monitoring in tropical river systems and demonstrate its potential for early detection of invasive species. This pioneering baseline study provides essential data to guide conservation strategies, inform management policies, and contribute to broader efforts addressing freshwater biodiversity loss in Southeast Asia.

淡水生态系统是全球最受威胁的生态系统之一，由于栖息地退化、污染、过度开发和入侵物种的引入，淡水生态系统面临着生物多样性的迅速下降。东南亚被公认为全球淡水生物多样性的热点地区，正面临着一些最高的灭绝风险。霹雳河是马来西亚第二长的河流，它支持着对区域生态稳定和粮食安全至关重要的多种鱼类群落，但缺乏全面的生物多样性评估。本研究利用针对12S rRNA基因的环境DNA （environmental DNA, eDNA）元条形码技术对Perak河的鱼类多样性进行综合评估，并检测入侵物种。在Illumina MiSeq平台上使用高通量测序对五个地点的水样进行分析。共鉴定出16目32科51属57种，鲤科为优势科（15.78 %）。此外，还发现了在全球或马来西亚被认定为入侵物种的小鳞虾（Micropterus salmoides）、Oreochromis spp和affinis等入侵物种，引起了人们对生态的关注。我们的研究结果强调了eDNA元条形码在热带河流系统非侵入性生物多样性监测中的有效性，并展示了其在入侵物种早期检测方面的潜力。这项开创性的基线研究为指导保护战略、指导管理政策提供了必要的数据，并有助于解决东南亚淡水生物多样性丧失的更广泛努力。

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引用次数: 0

Intraspecific and interspecific functions in regulating vegetation biomass under nutrient addition in semiarid grasslands 营养添加对半干旱草原植被生物量的种内和种间调节作用

IF 3.4 2区环境科学与生态学 Q1 BIODIVERSITY CONSERVATION

Global Ecology and Conservation

Pub Date : 2026-01-13 DOI: 10.1016/j.gecco.2026.e04068

Caiwen Yang , Zhifei Chen , Meixing Feng , Yuting Yang , Yingkun Mou , Lingbin Yan , Yuan Liu , Bingcheng Xu

Long-term soil erosion causes widespread nitrogen (N) and phosphorus (P) limitation on the Loess Plateau. The response of community biomass to N and P addition is tightly linked to interspecific and intraspecific variations in community level traits. To explore this relationship, we conducted a split-plot experiment with N and P addition in the semiarid grasslands of the Loess Plateau. Measured key functional traits included plant height (PH), specific leaf area (SLA), and leaf/root N and P contents (LN, LP, RN, RP) with their ratios. Results showed that both single N and combined N and P addition significantly increased the community-weighted mean (CWM) of multiple key traits. Further analysis revealed that under N and P addition, variations in CWM traits were mainly driven by intraspecific variation. Intraspecific variation in CWM of PH, intraspecific variation in CWM of LN, and interspecific variation in CWM of LP were the key driving factors for changes in biomass. Our results highlighted that intraspecific variation primarily promoted community biomass accumulation by driving CWM traits under N and P addition. The key role of intraspecific variation contributes to an accurate understanding of the potential driving mechanisms underlying community biomass changes under nutrient enrichment, thereby providing a theoretical basis for the sustainable improvement of productivity during the restoration of grasslands on the Loess Plateau.

长期的土壤侵蚀导致黄土高原普遍存在氮磷限制。群落生物量对N和P添加的响应与群落水平性状的种间和种内变化密切相关。为了探究这一关系，我们在黄土高原半干旱草地上进行了分块加氮加磷试验。测定的关键功能性状包括株高（PH）、比叶面积（SLA）和叶/根N、P含量（LN、LP、RN、RP）及其比值。结果表明，单施氮和氮磷配施均显著提高了水稻多个关键性状的群落加权平均值（CWM）。进一步分析表明，在N和P添加下，CWM性状的变异主要是由种内变异驱动的。PH的种内、LN的种内和LP的种间变化是生物量变化的关键驱动因子。结果表明，在N和P添加条件下，种内变异主要通过驱动CWM性状来促进群落生物量积累。种内变异的关键作用有助于准确理解养分富集下群落生物量变化的潜在驱动机制，从而为黄土高原草原恢复过程中生产力的持续提高提供理论依据。

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引用次数: 0

The use of bird perches and artificial bat roosts to overcome dispersal and establishment limitation in bracken-dominated deforested areas 在以蕨类植物为主的毁林地区，利用鸟栖地和人工蝙蝠栖息来克服散布和建立的限制

IF 3.4 2区环境科学与生态学 Q1 BIODIVERSITY CONSERVATION

Global Ecology and Conservation

Pub Date : 2026-01-09 DOI: 10.1016/j.gecco.2026.e04064

Cesar Mayta , Cecilia L. López , Mariana Villegas , Isabell Hensen , Silvia C. Gallegos

The failure of seeds to arrive at suitable sites (dispersal limitation) and/or unsuitable conditions for germination, seedling survival and growth (establishment limitation) can impede the regeneration of tropical forests. We installed bird perches and artificial bat roosts in deforested areas dominated by the bracken fern Pteridium in the tropical montane forest of Bolivia to evaluate their effect on dispersal and establishment limitations. We also analyzed the relationship between seed size and life-history strategies of plants subject to both limitations. We found that perches reduced dispersal and establishment limitation of all seed sizes (small and large) and life-history strategies (pioneer and non-pioneer). In contrast, bat roosts did not reduce dispersal and establishment limitation in any of the categories. Our results reinforce the observation that dispersal limitation is one of the main filters that plant species must overcome in bracken-dominated deforested areas. The installation of bird perches as well as direct sowing of animal-dispersed seeds and planting of seedlings are strategies that could effectively support the regeneration of these widely distributed deforested areas.

种子不能到达合适的地点（传播限制）和/或发芽、幼苗存活和生长的不合适条件（建立限制）会阻碍热带森林的更新。我们在玻利维亚热带山地森林中以蕨类蕨类植物为主的毁林地区设置了鸟类栖息点和人工蝙蝠栖息点，以评估它们的扩散效果和种群限制。我们还分析了在这两种限制下植物的种子大小与生活史策略之间的关系。我们发现栖地降低了所有种子大小（小和大）和生活史策略（先锋和非先锋）的传播和建立限制。相比之下，蝙蝠的栖息地并没有减少任何种类的扩散和建立限制。我们的研究结果进一步证实了在蕨类植物为主的森林砍伐地区，扩散限制是植物必须克服的主要过滤器之一。设置鸟类栖息点以及直接播种动物传播的种子和种植幼苗是可以有效支持这些广泛分布的毁林地区再生的策略。

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