Journal for Nature Conservation最新文献

Modeling tiger dispersal in the central Indian landscape using a prey-predator game theory approach coupled with network analysis and remote sensing-GIS 利用猎物-捕食者博弈论方法结合网络分析和遥感-地理信息系统模拟印度中部地区老虎的扩散

IF 2.5 3区环境科学与生态学 Q2 BIODIVERSITY CONSERVATION

Journal for Nature Conservation

Pub Date : 2026-06-01 Epub Date: 2026-01-16 DOI: 10.1016/j.jnc.2026.127224

Anam Ahsan , Saurabh Shanu , Arijit Roy

Bengal tigers (Panthera tigris tigris) primarily inhabit fragmented and isolated landscapes, threatening their long-term survival. Habitat fragmentation disrupts movement, reduces genetic diversity, limits prey availability, and increases human-wildlife conflict. Maintaining ecological connectivity is essential for tiger dispersal and population stability. This study employs Remote Sensing and Geographic Information System (GIS) techniques to analyze habitat connectivity across six tiger reserves. Habitat suitability models, incorporating vegetation indices, prey density, and anthropogenic factors, were developed using GIS-based spatial analysis. Using a 200 km threshold, binary and probabilistic indices were applied to identify critical habitat patches for tiger dispersal. The Kanha-Achanakmar landscape emerged as a crucial corridor, exhibiting the highest Betweenness Centrality (BC) and Integral Index of Connectivity (IIC) values, highlighting its role in sustaining tiger populations and facilitating ecological linkages.

Additionally, the study integrates graph-theoretic and game-theoretic models to assess tiger dispersal dynamics. The game-theoretic approach evaluates behavioral strategies and the impact of landscape modifications on population viability. The findings emphasize the Pench-Kanha-Achanakmar corridor as a key dispersal route, supporting prey interactions and ecological stability. This research provides a computational framework for conservation planning, leveraging Remote Sensing, GIS, and mathematical modeling to inform strategies for maintaining long-term habitat connectivity and the persistence of wild tiger populations.

孟加拉虎（Panthera tigris tigris）主要生活在破碎和孤立的景观中，威胁着它们的长期生存。栖息地的破碎破坏了迁徙，减少了遗传多样性，限制了猎物的可得性，并增加了人类与野生动物的冲突。维持生态连通性对老虎的扩散和种群稳定至关重要。本研究采用遥感和地理信息系统（GIS）技术分析了六个老虎保护区的栖息地连通性。基于gis的空间分析方法，建立了包括植被指数、猎物密度和人为因素在内的生境适宜性模型。以200 km为阈值，采用二元指数和概率指数确定老虎扩散的关键生境斑块。坎哈-阿恰纳克马尔景观是一个重要的走廊，表现出最高的中间性中心性（BC）和整体连通性指数（IIC）值，突出了其在维持老虎种群和促进生态联系方面的作用。此外，该研究结合了图论和博弈论模型来评估老虎的扩散动力学。博弈论方法评估了行为策略和景观改变对种群生存能力的影响。研究结果强调，Pench-Kanha-Achanakmar走廊是一个关键的扩散路径，支持猎物相互作用和生态稳定。本研究为保护规划提供了一个计算框架，利用遥感、地理信息系统和数学模型，为维持野生老虎种群的长期栖息地连通性和持久性提供信息。

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引用次数: 0

Nasal hormone administration can support ambystomid salamander ex situ conservation breeding programs 鼻激素管理可以支持ambystomid salamander移地保护育种计划

IF 2.5 3区环境科学与生态学 Q2 BIODIVERSITY CONSERVATION

Journal for Nature Conservation

Pub Date : 2026-06-01 Epub Date: 2026-01-06 DOI: 10.1016/j.jnc.2026.127211

Devin M. Chen , Carrie K. Kouba , Terri L. Roth , Peter J. Allen , Nucharin Songsasen , Andrew J. Kouba

Over half of all species within the order Caudata are threatened and in need of conservation breeding efforts to prevent further population declines. Unfortunately, amphibians under human care can often face breeding difficulties due to challenges associated with mimicking natural environmental cues that initiate hormonal cascades for successful reproduction. Exogenous hormone administration can be an effective approach to overcome such seasonal and behavioral barriers in captivity. This research aimed to evaluate two different gonadotropin releasing hormone (GnRH) administration pathways on sperm quantity and quality in eastern tiger salamanders (Ambystoma tigrinum). Each tiger salamander (n = 14 males/treatment) was randomly rotated through six treatments, which included a Low (0.02 μg/g), Medium (0.1 μg/g), and High (0.5 μg/g) resolving GnRH concentration 24 h after a prime of 0.025 μg/g of GnRH, administered either intramuscularly or nasally. There was no significant difference (p > 0.05) in the number of spermic responders among treatments. The Medium nasal treatment resulted in the highest sperm concentration (5.2 ± 2.4 × 10⁶ sperm/mL) and was not different (p > 0.05) from the Medium (1.7 ± 0.5 × 10⁶ sperm/mL) or High (3.5 ± 1.3 × 10⁶ sperm/mL) intramuscular treatments. Sperm morphology and velocity were not different (p > 0.05) among the doses and administration routes. We show that nasal administration of GnRH in tiger salamanders can result in sperm samples with high concentration and motility. Less invasive hormone administration routes may provide an alternative strategy for hormone treatment in at-risk caudates, especially when injections are not feasible.

尾尾目中超过一半的物种受到威胁，需要保护繁殖措施以防止种群进一步减少。不幸的是，在人类照顾下的两栖动物经常面临繁殖困难，这是由于模仿自然环境线索引发成功繁殖的激素级联所带来的挑战。外源性激素管理可以有效地克服这种季节性和行为障碍在圈养。本研究旨在探讨两种不同的促性腺激素释放激素（GnRH）给药途径对东部虎蝾螈精子数量和质量的影响。每只虎蝾螈（雄性14只/组）在肌肉或鼻腔注射0.025 μg GnRH 24 h后，随机旋转6个处理，分别为低（0.02 μg/g）、中（0.1 μg/g）和高（0.5 μg/g）处理。不同治疗组的精子应答数差异无统计学意义（p > 0.05）。中鼻组的精子浓度最高（5.2±2.4 × 106精子/mL），与肌肉注射组（1.7±0.5 × 106精子/mL）和肌肉注射组（3.5±1.3 × 106精子/mL）差异无统计学意义（p > 0.05）。不同剂量和给药途径对精子形态和速度无显著影响（p > 0.05）。我们表明，在虎蝾螈鼻给药GnRH可以导致精子样品具有高浓度和运动性。侵入性较小的激素给药途径可能为高危尾状动脉的激素治疗提供另一种策略，特别是在注射不可行的情况下。

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引用次数: 0

Promote or inhibit? The impact of national park establishment on regional economic development: Evidence from Wuyishan National Park, China 促进还是抑制？国家公园建设对区域经济发展的影响——以武夷山国家公园为例

IF 2.5 3区环境科学与生态学 Q2 BIODIVERSITY CONSERVATION

Journal for Nature Conservation

Pub Date : 2026-06-01 Epub Date: 2026-01-18 DOI: 10.1016/j.jnc.2026.127230

Suwan Li , Honghong Yu , Mengyuan Qiu , Jiameng Yang

Clarifying the effects of national park establishment on regional economic development is essential for ensuring policy sustainability. This study treats Wuyishan National Park Establishment (WNPE) as a quasi-natural experiment and constructs a panel dataset for 138 counties in Fujian, Jiangxi, and Zhejiang provinces over the period 2011–2023. Total factor productivity (TFP) is adopted as a proxy for regional economic development and is measured using the Super-SBM Global Malmquist Index Model. The difference-in-differences (DID) model, mediation effect model, and spatial econometric models are then employed to systematically assess the impact of WNPE on economic development, underlying transmission mechanisms, and spatial spillover effects. The results show that: (1) WNPE significantly suppresses regional economic development, and this finding remains robust to multiple robustness checks. (2) WNPE leads to sluggish growth in the tertiary sector while inducing only a limited withdrawal of the secondary sector, thereby hindering the process of industrial structure adjustment and ultimately exerting a negative impact on regional economic development. (3) Compared to counties with underdeveloped infrastructure, those with well-developed infrastructure can effectively alleviate the negative economic effects of WNPE. (4) At present, the impact of WNPE on the economies of adjacent regions is relatively limited, and no significant spatial spillover effects are observed. Overall, these findings reveal the relationship and mechanism between WNPE and regional economic development. These, in turn, provide the decision-making references for policymakers to develop scientific, targeted, and differentiated national park policies and adjust regional economic development strategies.

明确国家公园建设对区域经济发展的影响是确保政策可持续性的必要条件。本文以武夷山国家公园建设为准自然实验，构建了2011-2023年福建、江西、浙江三省138个县的面板数据集。采用Super-SBM全球Malmquist指数模型对全要素生产率（TFP）作为区域经济发展的指标进行测度。运用差别化差分（DID）模型、中介效应模型和空间计量经济学模型，系统评估了西部农村资本流动对经济发展的影响、潜在传导机制和空间溢出效应。研究结果表明：(1)WNPE显著抑制区域经济发展，且经多次稳健性检验，这一发现具有稳健性。(2) WNPE导致第三产业增长缓慢，第二产业退出有限，从而阻碍了产业结构调整进程，最终对区域经济发展产生负面影响。(3)与基础设施欠发达的县相比，基础设施发达的县可以有效缓解WNPE的负面经济效应。(4)目前，WNPE对相邻区域经济的影响相对有限，没有明显的空间溢出效应。总体而言，这些发现揭示了WNPE与区域经济发展的关系和机制。为决策者制定科学的、针对性的、差别化的国家公园政策和调整区域经济发展战略提供决策参考。

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引用次数: 0

Avian diversity and responses to altitude and human disturbance in Askot Wildlife Sanctuary, Western Himalaya 西喜马拉雅阿斯科特野生动物保护区鸟类多样性及其对海拔和人为干扰的响应

IF 2.5 3区环境科学与生态学 Q2 BIODIVERSITY CONSERVATION

Journal for Nature Conservation

Pub Date : 2026-06-01 Epub Date: 2026-01-25 DOI: 10.1016/j.jnc.2026.127234

Soni Bisht , Gopal Singh Rawat

The Himalaya represents one of the world’s most significant biodiversity hotspots, yet many of its protected areas remain poorly documented. Askot Wildlife Sanctuary, located in the Western Himalaya (630–4,230 m), was surveyed from 2016 to 2019 to establish a baseline avifaunal inventory and assess species–environment relationships across habitats and elevation zones. Standardized point count surveys recorded 239 bird species from 53 families. Among these, five species are globally Threatened and six are Near Threatened according to the IUCN Red List. Additionally, 156 species are listed under the Indian Wildlife (Protection) Act of 1972, emphasizing the site’s conservation significance. The assemblage comprised 57 migratory species, including both altitudinal and long-distance migrants, and 74 Himalayan endemics, highlighting the sanctuary as a critical ecological refuge. Species richness followed a unimodal elevational pattern, with mid-elevations supporting the highest diversity due to the overlap of lowland and high-altitude taxa. Habitat-specific analysis revealed maximum Shannon diversity in agricultural land (0.34±0.01 SE), while conifer forests sustained the lowest (0.15 ± 0.01 SE). Avian diversity showed a significant negative correlation with altitude (r = − 0.48, p <0.001) and a positive correlation with tree richness (r = 0.31, p <0.05). The occurrence of conservation-priority species such as Cheer Pheasant, Critically Endangered White-rumped and Red-headed Vultures, and Endangered raptors including Egyptian Vulture and Steppe Eagle further underscores the sanctuary’s global importance. These findings demonstrate the ecological sensitivity of Himalayan avifauna to elevational dynamics, habitat heterogeneity, and anthropogenic pressures, and highlight the urgent need for habitat-specific conservation and management interventions.

喜马拉雅是世界上最重要的生物多样性热点地区之一，但它的许多保护区仍然缺乏记录。2016年至2019年，研究人员对位于喜马拉雅西部（630 - 4230米）的阿斯科特野生动物保护区进行了调查，以建立基线鸟类物种清查，并评估栖息地和海拔区域的物种-环境关系。标准化点数调查记录了53科239种鸟类。根据世界自然保护联盟红色名录，其中5个物种是全球濒危物种，6个物种是近危物种。此外，根据1972年的《印度野生动物（保护）法案》，有156种物种被列入名单，强调了该遗址的保护意义。其中包括57种迁徙物种，包括纵向和长距离迁徙物种，以及74种喜马拉雅特有物种，突出了该保护区作为重要生态避难所的地位。物种丰富度呈现单峰分布格局，由于低地和高海拔类群的重叠，中海拔地区的物种多样性最高。农用地Shannon多样性最高（0.34±0.01 SE），针叶林最低（0.15±0.01 SE）。鸟类多样性与海拔高度呈显著负相关（r = - 0.48, p <0.001），与树木丰富度呈正相关（r = 0.31, p <0.05）。保护重点物种的出现，如野鸡、极度濒危的白背和红头秃鹫，以及包括埃及秃鹫和草原鹰在内的濒危猛禽，进一步凸显了该保护区在全球的重要性。这些发现表明喜马拉雅地区鸟类对海拔动态、栖息地异质性和人为压力的生态敏感性，并强调了生境保护和管理干预措施的迫切需要。

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引用次数: 0

Reimagining nature through postcolonial ecocriticism: Literary resistance in contemporary African fiction 通过后殖民生态批评重新想象自然：当代非洲小说中的文学抵抗

IF 2.5 3区环境科学与生态学 Q2 BIODIVERSITY CONSERVATION

Journal for Nature Conservation

Pub Date : 2026-06-01 Epub Date: 2026-02-02 DOI: 10.1016/j.jnc.2026.127238

Peter Pacho , Luo Lianggong

Many postcolonial African nations grapple with the complex relationship between economic growth and environmental sustainability. This study analyzes Achebe’s Things Fall Apart (1958), Ngũgĩ’s Devil on the Cross (1982), and Adichie’s Half of a Yellow Sun (2006) using postcolonial ecocriticism in order to examine how these African authors reimagine nature as a symbol of identity, resilience, and resistance. The approach links colonial histories to ecological concerns, challenging colonial environmental narratives while foregrounding Indigenous views. Using close reading and thematic analysis, this study focuses on how land and ecology intersect with culture, power, and social justice. Drawing on Nixon’s concept of slow violence and Iheka’s aesthetic of proximity, it examines how these authors reveal the long-lasting, often invisible, effects of environmental degradation and the intimate relationships between humans and the natural world. The findings indicate that the selected novels reclaim landscapes as cultural and moral spaces rooted in Indigenous ecological ethics and communal values. Both novels challenge colonial portrayals of Africa as “wild” or “uncivilized,” instead depicting nature as integral to collective memory, cultural identity, and sustainable being. Through this eco-critical lens, the authors critique the enduring ecological consequences of colonialism and advocate for a sustainable, human-centered relationship with the environment grounded in Indigenous environmental knowledge.

许多后殖民时代的非洲国家都在努力解决经济增长与环境可持续性之间的复杂关系。本研究分析了阿奇贝的《分崩离析》（1958）、Ngũgĩ的《十字架上的魔鬼》（1982）和阿迪奇的《半个黄太阳》（2006），运用后殖民生态批评的方法，以考察这些非洲作家如何将自然重新想象为身份、恢复力和抵抗的象征。该方法将殖民历史与生态问题联系起来，挑战殖民环境叙事，同时突出土著观点。通过细读和专题分析，本研究关注土地和生态如何与文化、权力和社会正义交叉。本书借鉴了尼克松的“缓慢暴力”概念和伊赫卡的“亲近”美学，探讨了这些作者如何揭示环境退化的长期、往往是无形的影响，以及人类与自然世界之间的亲密关系。研究结果表明，这些小说将景观重新定位为植根于土著生态伦理和社区价值观的文化和道德空间。这两部小说都挑战了殖民时期对非洲“野蛮”或“未开化”的描绘，而是将自然描绘成集体记忆、文化认同和可持续存在的组成部分。通过这一生态批判的视角，作者批判了殖民主义带来的持久的生态后果，并倡导以土著环境知识为基础，与环境建立可持续的、以人为本的关系。

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引用次数: 0

Seasonal and environmental determinants of African elephant (Loxodonta africana) movement in the W-Arly-Pendjari complex W-Arly-Pendjari复合体中非洲象（Loxodonta africana）运动的季节和环境决定因素

IF 2.5 3区环境科学与生态学 Q2 BIODIVERSITY CONSERVATION

Journal for Nature Conservation

Pub Date : 2026-06-01 Epub Date: 2026-01-13 DOI: 10.1016/j.jnc.2026.127225

Hugues A. Akpona , Stanislas Mahussi Gandaho , Charlemagne D.S.J. Gbemavo , Georges Nobime , Barthélémy Kassa , Chabi A.M.S. Djagoun

Seasonal and environmental drivers shape African elephant (Loxodonta africana) movement, influencing home range dynamics, resource use, and mobility patterns. Understanding elephant spatial ecology is vital for conservation planning, particularly in regions affected by increasing insecurity. This study provides the first comprehensive analysis of seasonal home range variation, displacement behaviour, and environmental influences on African elephants in the transboundary W-Arly-Pendjari (WAP) Complex of West Africa. Using GPS telemetry data from 22 elephants (7 males, 15 females) tracked between 2019 and 2024, we applied a-LoCoH methods to estimate utilization distributions across 50% to 95% isopleths and linear regression to assess environmental factors influencing displacement. Male elephants had slightly larger home ranges in the dry season (95% isopleth: 1064 km²) than wet season (988 km²), while females showed the opposite trend (dry: 1066 km², wet: 1098 km²), though seasonal differences were not significant. Across all sex-season combinations, home range overlap was highest among females during the wet season (mean = 190.0 km²) and lowest among males during the dry season (mean = 84.0 km²), reflecting strong female cohesion and male spatial segregation. Males showed significantly greater displacement in the dry season (296 km) than wet season (252 km), while female displacement showed no seasonal variation. Environmental modelling showed that elephant movement increased farther from conflict zones and rivers, and closer to water points. These findings demonstrate that both ecological resources and anthropogenic pressures shape elephant movement patterns in sex-specific ways, informing transboundary conservation strategies in the WAP Complex.

季节和环境因素塑造了非洲象（Loxodonta africana）的运动，影响了栖息地动态、资源利用和移动模式。了解大象的空间生态对于保护规划至关重要，特别是在受不安全因素影响的地区。本研究首次全面分析了西非跨界W-Arly-Pendjari （WAP）群落中非洲象的季节性栖息地变化、迁移行为和环境影响。利用2019年至2024年间追踪的22头大象（7头公象，15头母象）的GPS遥测数据，我们应用a-LoCoH方法估算了50%至95%等平面上的利用分布，并利用线性回归评估了影响位移的环境因素。旱季雄性象的活动范围（95%等线：1064 km2）略大于雨季（988 km2），而雌性象的活动范围则相反（干季：1066 km2，雨季：1098 km2），但季节差异不显著。在所有的性别-季节组合中，丰水季雌性栖息地重叠最多（平均为190.0 km2），旱季雄性栖息地重叠最少（平均为84.0 km2），反映了强烈的雌性凝聚力和雄性空间隔离。雄蚊在旱季的迁移量（296 km）显著大于湿季（252 km），雌蚊的迁移量无季节变化。环境模型显示，远离冲突地区和河流以及靠近水源的地方，大象的活动增加了。这些发现表明，生态资源和人为压力都以性别特异性的方式塑造了大象的运动模式，为WAP Complex的跨界保护策略提供了信息。

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引用次数: 0

Seasonal habitat use of the West-Pannonian great bustard (Otis tarda): insights from seven years of conservation practice in Central European agro-steppe habitats 西潘诺尼亚大鸨（Otis tarda）的季节性栖息地利用：来自中欧农业草原栖息地七年保护实践的见解

IF 2.5 3区环境科学与生态学 Q2 BIODIVERSITY CONSERVATION

Journal for Nature Conservation

Pub Date : 2026-06-01 Epub Date: 2026-01-10 DOI: 10.1016/j.jnc.2026.127222

Soňa Svetlíková , Péter Spakovszky , Rainhard Raab , Maximilian Raab , Adam Šupčík , Ján Škrábal , Jochen Steindl , Hannah Böing , Ladislav Naďo , Jozef Ridzoň , Rainer Raab

The great bustard (Otis tarda) is a globally threatened farmland bird with variable population trends across Europe. While many populations are declining, the West-Pannonian population has increased, providing an opportunity to investigate species persistence in intensively cultivated landscapes. We examined seasonal habitat use of this population using Ecological Niche Factor Analysis (ENFA) on a seven-year dataset of systematic observations—the first ENFA application for the West-Pannonian great bustard population. This methodological framework allowed us to identify key ecological factors driving habitat selection, assess interannual consistency, and explore sex-specific differences. Our results indicate that agri-environmental scheme (AES) supported fallows and winter rapeseed are consistently selected and function as critical seasonal resources, whereas other habitat types are used only during certain periods of the season, but remain essential within the agricultural mosaic. Habitat preferences were largely similar between males and females, with minor seasonal differences. By linking habitat selection to measurable land-use features, our study provides a robust, evidence-based framework for guiding conservation management of great bustards. These findings demonstrate how targeted agri-environmental interventions can enhance habitat suitability and persistence of threatened farmland species, offering practical guidance for spatial planning and conservation strategies grounded in empirical habitat-use data.

大鸨（Otis tarda）是一种全球受威胁的农田鸟类，在欧洲各地的种群趋势不一。虽然许多种群数量正在下降，但西潘诺尼亚种群数量却在增加，这为研究集约化栽培景观中的物种持久性提供了机会。本文采用生态位因子分析（ENFA）方法对该种群的季节性生境利用进行了分析，这是首次将生态位因子分析应用于西潘诺尼亚大鸨种群。该方法框架使我们能够确定驱动栖息地选择的关键生态因素，评估年际一致性，并探索性别特异性差异。我们的研究结果表明，农业环境方案（AES）支持的休耕地和冬季油菜籽是持续选择的，并且是关键的季节性资源，而其他栖息地类型仅在季节的特定时期使用，但在农业马赛克中仍然必不可少。雄性和雌性对栖息地的偏好基本相似，季节性差异较小。通过将栖息地选择与可测量的土地利用特征联系起来，我们的研究为指导大鸨的保护管理提供了一个强有力的、基于证据的框架。这些发现表明，有针对性的农业环境干预措施可以增强受威胁农田物种的栖息地适宜性和持久性，为基于经验栖息地利用数据的空间规划和保护策略提供实用指导。

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引用次数: 0

Development of biodiversity prediction model for inland wetlands in Korea through Machine learning 利用机器学习开发韩国内陆湿地生物多样性预测模型

IF 2.5 3区环境科学与生态学 Q2 BIODIVERSITY CONSERVATION

Journal for Nature Conservation

Pub Date : 2026-06-01 Epub Date: 2026-01-19 DOI: 10.1016/j.jnc.2026.127227

Myeong Heon Lee , Jae Geun Kim

Wetlands support exceptional biodiversity and vital ecosystem services but face accelerating loss and fragmentation worldwide. Predicting how biodiversity varies among wetlands and identifying its key environmental drivers are crucial for conservation, yet traditional approaches often struggle with spatial heterogeneity, data limitations, and the challenge of distinguishing among wetland types. Here, we combined high-resolution, field-delineated wetland boundaries with interpretable machine learning to model species richness and phylogenetic diversity across vascular plants, birds, and fish in all major inland wetland types in Korea. Our models, rigorously validated using spatial block cross-validation, identified the main environmental determinants of biodiversity at the scale of true wetland units. We then used model interpretation techniques to uncover nonlinearities and ecological thresholds in biodiversity–environment relationships. Our results reveal that vegetated area is a universal, dominant predictor across taxa and wetland types, but its effects are nonlinear, with clear saturation or optimum thresholds. Other drivers, such as hydrological stability and landscape composition, were context-dependent. These findings challenge the assumption that “more is always better,” instead highlighting system- and taxon-specific thresholds as effective targets for wetland conservation and restoration. By integrating interpretable machine learning with field-true spatial data, this study offers actionable benchmarks for monitoring, management, and policy, and offers a modeling framework applicable to wetland conservation efforts worldwide.

湿地支持着特殊的生物多样性和重要的生态系统服务，但在世界范围内面临着加速丧失和破碎化。预测湿地生物多样性如何变化并确定其关键环境驱动因素对于湿地保护至关重要，然而传统的方法经常受到空间异质性、数据局限性和区分湿地类型的挑战的困扰。在这里，我们将高分辨率、实地划定的湿地边界与可解释的机器学习相结合，模拟了韩国所有主要内陆湿地类型中维管植物、鸟类和鱼类的物种丰富度和系统发育多样性。我们的模型经过空间块交叉验证的严格验证，确定了真正湿地单元尺度上生物多样性的主要环境决定因素。然后，我们使用模型解释技术来揭示生物多样性-环境关系的非线性和生态阈值。研究结果表明，植被面积是一个普遍的、主导的预测因子，但其影响是非线性的，存在明显的饱和或最佳阈值。其他驱动因素，如水文稳定性和景观组成，则依赖于环境。这些发现挑战了“越多越好”的假设，而不是强调系统和分类群特定的阈值是湿地保护和恢复的有效目标。通过将可解释的机器学习与现场真实空间数据相结合，本研究为监测、管理和政策提供了可操作的基准，并提供了一个适用于全球湿地保护工作的建模框架。

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引用次数: 0

Impacts of anthropogenic activities on invertebrate communities in Dianchi Lake revealed by eDNA metabarcoding 人类活动对滇池无脊椎动物群落的影响

IF 2.5 3区环境科学与生态学 Q2 BIODIVERSITY CONSERVATION

Journal for Nature Conservation

Pub Date : 2026-06-01 Epub Date: 2026-02-10 DOI: 10.1016/j.jnc.2026.127245

Yuanyuan Lin , Jingge Xu , Shan Xu , Qianqian Xiang , Xiaohua Zhou , Liwei He , Gensen Yin

As environmental indicators, efficient and accurate monitoring of invertebrates is of great significance for providing references for water environment conservation, and environmental DNA (eDNA) metabarcoding provides a useful tool for it. Dianchi Lake is a typical urban lake suffering from various anthropogenic activities in Kunming, Yunnan, China and the current characteristics of invertebrate communities are unclear. Therefore, this study investigated the spatial and seasonal patterns of invertebrates and the environmental stressors of Dianchi Lake. Based on eDNA metabarcoding, 452 ASVs of invertebrates belonging to Arthropoda, Cnidaria, Mollusca, Protozoa, Rotifera were identified in Dianchi Lake, with Diaphanosoma, Brachionus, Daphnia, Euchlanis, Mesocyclops, Macrothrix, Trichocerca and Chydorus being dominant genera. Distinct biodiversity patterns (e.g., ASVs number, dominant genera, relative abundances, Shannon-Wiener index) were exhibited between the dry and wet period. The spatial-seasonal heterogeneity of the relation between the invertebrate community patterns and environmental factors was observed in Dianchi Lake. The patterns of invertebrate community were closely related to environmental factors especially about NH₄⁺, conductivity (C), and Chlorophyll-a (Chl-a), which were closely associated with various environmental pressures brought by anthropogenic activities such as urbanization, industrial and agricultural activities. This study provides insights on conserving the diversity of invertebrate communities and the management of Dianchi Lake.

无脊椎动物作为环境指标，高效、准确的监测对水环境保护提供参考具有重要意义，环境DNA元条形码为其提供了有用的工具。滇池是云南昆明市典型的城市湖泊，受到各种人为活动的影响，目前无脊椎动物群落特征尚不清楚。为此，本研究对滇池无脊椎动物的空间和季节格局及环境压力因素进行了研究。基于eDNA元编码，共鉴定出节肢动物、刺胞动物、软体动物、原生动物、轮虫目等452种无脊椎动物asv，其中Diaphanosoma、Brachionus、Daphnia、Euchlanis、Mesocyclops、Macrothrix、Trichocerca和Chydorus为优势属。干湿期的生物多样性格局（asv数量、优势属、相对丰度、Shannon-Wiener指数）明显不同。研究了滇池无脊椎动物群落格局与环境因子关系的空间-季节异质性。无脊椎动物群落格局与环境因子密切相关，特别是NH4+、电导率(C)和叶绿素a (Chl-a)，它们与城市化、工农业活动等人为活动带来的各种环境压力密切相关。本研究为滇池无脊椎动物群落多样性保护和管理提供了参考。

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引用次数: 0

Mean annual temperature shapes distribution of the cryptic wader Ibisbill (Ibidorhyncha struthersii) in the Northwestern Himalayas 年平均温度对喜玛拉雅西北地区隐水獭Ibisbill （Ibidorhyncha struthersii）分布的影响

IF 2.5 3区环境科学与生态学 Q2 BIODIVERSITY CONSERVATION

Journal for Nature Conservation

Pub Date : 2026-06-01 Epub Date: 2026-02-06 DOI: 10.1016/j.jnc.2026.127244

Iqram ul Haq, Khursheed Ahmad

The Ibisbill (Ibidorhyncha struthersii) is a cryptic high-altitude shorebird whose distribution remains poorly understood, particularly in relation to climatic constraints. Identifying areas of climatic suitability is essential for assessing the vulnerability of understudied montane species under climate change. We used an ensemble species distribution modelling approach with six bioclimatic variables to estimate current climatic suitability and project future changes across the Northwestern Himalayas. Weighted mean and committee averaging ensemble methods showed high predictive performance (AUC = 0.976 and 0.96; TSS = 0.893 and 0.89, respectively), supporting their reliability for climate-based projections. Among the predictors, mean annual temperature was the dominant driver, accounting for approximately 60% of relative importance, whereas other temperature- and precipitation-related variables contributed comparatively little to explaining the species’ distribution. Future projections indicate a net expansion in the area subject to suitable climatic conditions, particularly along mid-elevation river corridors. By focusing exclusively on climatic variables, this study provides a first-order assessment of climate-driven constraints on the distribution of a specialized montane riverine bird and establishes a baseline for long-term conservation planning, monitoring, and climate-adaptive management in Himalayan river systems.

Ibisbill （Ibidorhyncha struthersii）是一种神秘的高海拔滨鸟，其分布仍然知之甚少，特别是与气候限制的关系。确定气候适宜性区域对于评估未充分研究的山地物种在气候变化下的脆弱性至关重要。我们使用了一个包含6个生物气候变量的物种分布模型方法来估计西北喜马拉雅地区当前的气候适宜性和预测未来的变化。加权平均和委员会平均集合方法显示出较高的预测性能（AUC分别为0.976和0.96；TSS分别为0.893和0.89），支持了它们对气候预测的可靠性。在预测因子中，年平均温度是主要驱动因子，约占相对重要性的60%，而其他与温度和降水相关的变量对解释物种分布的贡献相对较小。未来的预测表明，在适当的气候条件下，该地区的净扩张，特别是沿中高河流走廊。通过对气候变量的专门研究，本研究提供了气候驱动的喜马拉雅河流鸟类分布限制的一级评估，并为喜马拉雅河流系统的长期保护规划、监测和气候适应性管理建立了基线。

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引用次数: 0