Global Ecology and Conservation最新文献_第7页

Diatoms as indicators of eutrophication: Relationship with transparency, total phosphorus and Chlorophyll-a concentration in Central European lakes 硅藻作为富营养化的指示器：与中欧湖泊透明度、总磷和叶绿素-a浓度的关系

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

Global Ecology and Conservation

Pub Date : 2025-12-13 DOI: 10.1016/j.gecco.2025.e04025

Monika Rzodkiewicz , Izabela Zawiska , Miłosz Sobczak

Lakes around the world are increasingly impacted by anthropogenic stressors, from local pollution to global change. Their close interaction with surrounding landscapes makes lakes serve as sensitive indicators of both internal and external disturbances, with their sediments preserving records of these changes. This study investigates the relationship between prevalent diatom taxa in the Central European Diatom training set and key eutrophication indicators: transparency, total phosphorus, and Chlorophyll-a, across 64 lakes from northeastern Poland. These variables were selected because they are routinely measured in lake monitoring programs and are strongly associated with diatom community structure. This study identifies the most abundant species, characterizes their ecological preferences, and highlights taxa most indicative of variations along key environmental gradients. Several taxa, including Cyclostephanos dubius, Stephanodiscus hantzschii, and Lindavia radiosa, are robust indicators of eutrophic environments. Others, such as Asterionella formosa and Aulacoseira ambigua, exhibit broader ecological tolerances, thriving under meso-eutrophic conditions. Taxa like Pantocsekiella comensis and Staurosirella lapponica are characteristic of oligo-mesotrophic lakes. Achnanthes exigua and Geissleria schoenfeldii provide additional insights into identifying early shifts from oligotrophic to mesotrophic conditions. Moreover, we refine the ecological profiles of previously under-characterised taxa, including Diatoma tenuis and Fragilaria voucheriae, which are shown in our research, to prefer mesotrophic conditions. These findings provide novel regionally relevant autecological data for central Europe, where calibrated diatom training sets remain scarce. We believe that these results will contribute significantly to both palaeoenvironmental reconstructions and present lake management decisions in similar limnological contexts.

世界各地的湖泊越来越多地受到人为压力因素的影响，从局部污染到全球变化。它们与周围景观的密切相互作用使湖泊成为内部和外部干扰的敏感指标，其沉积物保存了这些变化的记录。本研究调查了中欧硅藻训练集中常见硅藻类群与波兰东北部64个湖泊富营养化关键指标：透明度、总磷和叶绿素-a之间的关系。之所以选择这些变量，是因为它们在湖泊监测项目中经常被测量，并且与硅藻群落结构密切相关。本研究确定了最丰富的物种，表征了它们的生态偏好，并突出了最能指示关键环境梯度变化的分类群。一些分类群，包括环stephanos dubius， Stephanodiscus hantzschii和Lindavia radiosa，是富营养化环境的有力指标。其他的，如福尔摩沙Asterionella formosa和Aulacoseira ambigua，表现出更广泛的生态耐受性，在中富营养化条件下茁壮成长。comensis Pantocsekiella和Staurosirella lapponica等分类群是低中营养湖泊的特征。紫金螺和雪氏盖氏菌为鉴别从少营养到中营养状态的早期转变提供了额外的见解。此外，我们改进了以前未被充分描述的分类群的生态概况，包括在我们的研究中显示的薄壁硅藻和薄壁Fragilaria voucheriae，更喜欢中营养条件。这些发现为中欧提供了新的区域相关的地质数据，在那里校准的硅藻训练设备仍然稀缺。我们相信这些结果将对古环境重建和类似湖泊环境下的湖泊管理决策有重要贡献。

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引用次数: 0

Deep-sea and deeply vulnerable: Assessing the conservation status of the kitefin shark (Dalatias licha) 深海和极度脆弱：鸢鲨的保护状况评估

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

Global Ecology and Conservation

Pub Date : 2025-12-13 DOI: 10.1016/j.gecco.2025.e04026

W. Medeiros-Leal , M. de Barros , H.G. Silva , O. Crespo-Neto , T.K. Mildenberger , A. Aires-Silva , M. Pinho , R. Santos

Deep-sea ecosystems harbor highly vulnerable species, yet their conservation status remains poorly understood. The kitefin shark (Dalatias licha), a large deep-sea mesopredator, exemplifies this challenge. In the Azores archipelago (Portugal), historical industrial fisheries exploited this species from the 1970s until the late 1990s. The species shows life-history traits typical of low-productivity elasmobranchs, including slow growth, late maturity, and very low intrinsic population growth (5 % per generation). Using fisheries-dependent data, including catch reconstructions (1972–2018), and catch-per-unit-effort, we applied age-structured demographic models and biomass dynamics approaches to assess population status. Our results indicate that past historical exploitation depleted the population, reducing biomass to critically low levels. Although some recovery has been observed since fishery closure, rebuilding is extremely slow, and current biomass remains at only ∼56 % of that expected for a sustainable population. These results highlight the need to recognise the kitefin shark as a highly vulnerable species and to implement precautionary conservation measures, particularly in data-limited deep-sea fisheries.

深海生态系统庇护着高度脆弱的物种，但人们对它们的保护状况知之甚少。风筝鲨（Dalatias licha），一种大型深海中掠食者，就是这种挑战的例证。在亚速尔群岛（葡萄牙），从20世纪70年代到90年代末，历史上的工业渔业对该物种进行了开发。该物种表现出典型的低生产力弹性枝的生活史特征，包括生长缓慢、成熟期晚和极低的内在种群增长率（每代5 %）。利用渔业相关数据，包括渔获量重建（1972-2018）和单位努力渔获量，我们应用年龄结构的人口模型和生物量动力学方法来评估种群状况。我们的研究结果表明，过去的历史开发耗尽了种群，使生物量降至极低的水平。虽然自渔场关闭以来已经观察到一些恢复，但重建非常缓慢，目前的生物量仍然仅为可持续种群预期的约56% %。这些结果突出表明，有必要认识到风筝鲨是一种高度脆弱的物种，并采取预防性保护措施，特别是在数据有限的深海渔业中。

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引用次数: 0

Genetic diversity and population structure of the Chinese endemic Chrysosplenium macrophyllum based on EST-SSR markers 基于EST-SSR标记的中国特有大叶黄的遗传多样性和群体结构

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

Global Ecology and Conservation

Pub Date : 2025-12-12 DOI: 10.1016/j.gecco.2025.e04022

Niyan Xiang , Tao Yuan , Peng Zhan , Tiange Yang , Xitang Chen , Xing Liu , Rui Qin , Hong Liu

Chrysosplenium macrophyllum Oliv., a perennial herb endemic to China, is of notable ecological and medicinal value. Nevertheless, its wild resources are gradually diminishing under the pressure of human activities, including crop cultivation and habitat disturbance. In this study, we investigated the genetic diversity and population structure of 404 individuals from 16 natural populations using twelve EST-SSR markers. Furthermore, ecological niche modeling was applied to predict the potential distribution of the species under past, current, and future climatic conditions. The results revealed a moderate level of genetic diversity in C. macrophyllum, which gradually decreased from west to east and was strongly constrained by temperature. Significant genetic differentiation was detected among populations, while molecular variance analysis indicated that most of the variation occurred within populations. Mantel tests showed that genetic differentiation was not correlated with environmental distance but exhibited a significant positive correlation with geographical distance. Structure analysis, principal coordinate analysis, and NJ clustering consistently divided the 16 populations into five groups, demonstrating a clear geographic structure. MaxEnt modeling further indicated that the current suitable distribution of C. macrophyllum is mainly located in subtropical mountainous regions of China, with altitude, annual precipitation, and isothermality being the key environmental factors, among which annual precipitation defined the northern distribution limit. Under future climatic scenarios, the suitable habitat is projected to slightly expand at the margins of its current range. These findings provide valuable insights for the conservation and sustainable utilization of C. macrophyllum in the context of human-induced climate change.

大叶黄。是中国特有的多年生草本植物，具有显著的生态和药用价值。然而，在人类活动的压力下，包括作物种植和栖息地的干扰，其野生资源正在逐渐减少。本研究利用12个EST-SSR标记对16个自然居群404个个体的遗传多样性和群体结构进行了分析。利用生态位模型预测了该物种在过去、现在和未来气候条件下的潜在分布。结果显示c . macrophyllum中等水平的遗传多样性,从西向东逐渐减少和强烈受到温度的限制。群体间存在显著的遗传分化，而分子方差分析表明，变异主要发生在群体内。Mantel检验表明，遗传分化与环境距离不相关，而与地理距离显著正相关。结构分析、主坐标分析和NJ聚类一致将16个种群划分为5个类群，地理结构清晰。MaxEnt模型进一步表明，目前大叶青的适宜分布主要集中在中国的亚热带山区，海拔、年降水量和等温是影响其分布的关键环境因子，其中年降水量确定了其北部的分布界限。在未来的气候情景下，预计适合的栖息地将在其当前范围的边缘略微扩大。这些发现为在人类活动引起的气候变化背景下对大叶青的保护和可持续利用提供了有价值的见解。

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引用次数: 0

Identifying suitable wildlife reintroduction/reinforcement habitats based on environmental, dietary, and behavioral suitability 根据环境、饮食和行为适宜性确定合适的野生动物再引入/强化栖息地

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

Global Ecology and Conservation

Pub Date : 2025-12-11 DOI: 10.1016/j.gecco.2025.e04023

Jiawei Li , Yuanhang Cheng , Yixuan Hong , Ruizheng Yang , Chen Li , Xijin Hu , Xiong Zhang

Global urbanization is intensifying human-induced ecological crises. As a crucial approach for ecological restoration, reintroduction/reinforcement of keystone species requires precise prediction of suitable release sites. However, current studies often focus solely on environmental suitability while neglecting food resource limitations and home-range requirement. Here we focus on a Critically Endangered keystone species, Chinese pangolin (Manis pentadactyla), in the eastern forests of Shenzhen, a megacity in China. To guide its reintroduction/reinforcement, we integrated three criteria (habitat, dietary, and behavioral suitability) to identify optimal reintroduction/reinforcement sites. We conducted i) field surveys to uncover its existing burrows; ii) prey preference analysis via sampling from the background and foraging burrows; iii) species distribution models to predict habitats for pangolins and preferred preys; and iv) spatial analyses to identify pangolin habitat patches (≥double home range) with preferred prey resources. Results indicated Shenzhen’s pangolins primarily consume six genera of ants (Ectomomyrmex, Diacamma and Polyrhachis) and termites (Macrotermes, Reticulitermes and Odontotermes). We derived robust models for both pangolins and its preys. Predicted habitats of pangolins and preferred preys are very similar, with the major large habitat patches located in the eastern forests and a few western hilly parks where our field surveys did not cover. We successfully identified eight large habitat patches (totally 265 km²) suitable for reintroduction/reinforcement of Chinese pangolins across Shenzhen. Our study is among the first to integrate three critical criteria to identify release sites for keystone species in an urban landscape, providing a reliable map of reintroduction/reinforcement of Chinese pangolins in Shenzhen.

全球城市化加剧了人为造成的生态危机。作为生态恢复的重要手段，关键物种的重新引入/强化需要对合适的放生地点进行精确的预测。然而，目前的研究往往只关注环境适宜性，而忽视了食物资源的限制和家庭范围的要求。在这里，我们关注一种极度濒危的关键物种——中国穿山甲（Manis pentadactyla），它生活在中国大城市深圳的东部森林里。为了指导其重新引入/强化，我们综合了三个标准（栖息地、饮食和行为适宜性）来确定最佳的重新引入/强化地点。我们进行了i)实地调查，以发现其现有的洞穴；Ii)通过背景和觅食洞穴取样分析猎物偏好；Iii)物种分布模型预测穿山甲栖息地和首选猎物；iv)空间分析识别穿山甲栖息地斑块（≥双家距）优选猎物资源。结果表明：深圳穿山甲主要捕食6属蚂蚁（外蚁属、双蚁属和多蚁属）和白蚁（大蚁属、网蚁属和齿蚁属）；我们为穿山甲及其猎物建立了稳健的模型。预测的穿山甲栖息地和首选猎物非常相似，主要的大生境斑块位于东部森林和少数西部丘陵公园，我们的实地调查没有覆盖。我们成功地在深圳地区确定了8个适合中国穿山甲重新引入/强化的大型生境斑块（总面积265 km2）。我们的研究是第一个整合三个关键标准来确定城市景观中关键物种的释放地点的研究之一，为中国穿山甲在深圳的重新引入/强化提供了可靠的地图。

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引用次数: 0

Neighboring forest habitat in blueberry systems reduces patterns of dominance and generates higher seasonal stability of spider communities 在蓝莓系统中，邻近的森林栖息地减少了蜘蛛的优势格局，并产生了更高的蜘蛛群落的季节性稳定性

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

Global Ecology and Conservation

Pub Date : 2025-12-11 DOI: 10.1016/j.gecco.2025.e04019

Sarah M. Rezende , Svoboda V. Pennisi , Jason M. Schmidt

Understanding the dynamics of spider communities within agricultural landscapes is crucial for biodiversity-based pest management. Although often considered habitat generalists, spider communities are partially shaped by environmental filtering and habitat conditions. However, many studies focus only on in-field communities, limiting insights into species sorting across the crop-noncrop interface. In this study, we explore the temporal dynamics of ground-dwelling spider communities collected from pitfall traps in a perennial agroecosystem, blueberry farms. We compared spider diversity and composition across three habitat types: adjacent forest, field edge, and field interior. Our results show that forest patches supported higher richness, greater evenness, and more temporally stable communities compared to commercial blueberry habitats. In contrast, both the field interior and edge were compositionally similar, with a high temporal rate of community change of a few disturbance-tolerant genera. Using Hill numbers, PCoA, and indicator species analysis, we found patterns consistent with strong environmental filtering in disturbed habitats and community persistence in more structurally stable forest patches. These findings underscore the ecological value of adjacent noncrop habitats and support the need to include species and compositional estimates from the habitat matrix around agroecosystems.

了解农业景观中蜘蛛群落的动态对于基于生物多样性的害虫管理至关重要。虽然通常被认为是栖息地的通才，但蜘蛛群落的部分形成是由环境过滤和栖息地条件决定的。然而，许多研究只关注田间群落，限制了对作物-非作物界面物种分选的认识。在这项研究中，我们探讨了从多年生农业生态系统蓝莓农场的陷阱中收集的地面栖息蜘蛛群落的时间动态。我们比较了三种生境类型：邻近森林、野外边缘和野外内部蜘蛛的多样性和组成。研究结果表明，与商业蓝莓栖息地相比，森林斑块支持更高的丰富度、更大的均匀度和更稳定的群落。相反，田间内部和边缘的群落组成相似，少数耐扰动属的群落变化率较高。利用Hill数、PCoA和指示物种分析，我们发现在受干扰的生境中存在强烈的环境过滤，在结构更稳定的森林斑块中存在群落持续性。这些发现强调了邻近非作物生境的生态价值，并支持从农业生态系统周围的生境矩阵中纳入物种和成分估算的必要性。

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引用次数: 0

Abiotic rather than biotic factors predominantly affect ecosystem multifunctionality in semiarid grasslands under changing precipitation 降水变化条件下影响半干旱草原生态系统多功能性的主要是非生物因子而非生物因子

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

Global Ecology and Conservation

Pub Date : 2025-12-11 DOI: 10.1016/j.gecco.2025.e04021

Lihua Zhang , Pengbin Bao , Quanlin Ma , Xi Wei , Ruifeng Zhao , Tong Zhou , Xiaonuo Guo , Mohan Sun

Global climate change has intensified the uncertainty of precipitation patterns, increased precipitation variations, and profoundly affected the ecosystem multifunctionality (EMF) of semi-arid grasslands. However, the relative contributions of biotic and abiotic factors to EMF under precipitation changes and their mechanisms remain unclear. We conducted a precipitation manipulation experiment initiated in 2013 in the grasslands of the Loess Plateau, and measured ecosystem properties in 2023 after ten years of continuous treatment (±40 %, ±20 %, and 0 %) to examine how biotic (plant diversity and soil microbial diversity) and abiotic (soil water content and soil pH) factors regulate EMF under different precipitation regimes. The results showed that with the increase in precipitation, EMF significantly increased. The positive correlation between plant diversity and EMF was stronger than that between microbial diversity and EMF. Variance decomposition indicated that abiotic factors, especially soil water content (SWC), explained a much larger proportion of EMF changes than biotic factors (20.1 % vs. 1.1 %). The structural equation model further indicated that precipitation also indirectly enhanced EMF by increasing SWC and plant diversity. Soil microbial diversity indirectly affected EMF by regulating plant diversity. An increase in soil pH value was unfavorable for microbial diversity and weakened EMF to a certain extent. We concluded that SWC and plant diversity are the key abiotic and biotic determinants of EMF in semi-arid grasslands, emphasizing the crucial influence of precipitation and the dominant role of abiotic factors.

全球气候变化加剧了降水格局的不确定性，增加了降水变化，深刻影响了半干旱草原生态系统的多功能性。然而，降水变化下生物和非生物因子对电磁场的相对贡献及其机制尚不清楚。我们于2013年在黄土高原草原开展了降水操纵实验，并在连续处理10年后（±40% %、±20% %和0 %）测量了2023年的生态系统特性，以研究不同降水制度下生物（植物多样性和土壤微生物多样性）和非生物（土壤含水量和土壤pH值）因子如何调节EMF。结果表明，随着降水的增加，电磁场显著增大。植物多样性与EMF的正相关强于微生物多样性与EMF的正相关。方差分解表明，非生物因素，尤其是土壤含水量（SWC）对EMF变化的解释比生物因素大得多（20.1 %对1.1 %）。结构方程模型进一步表明，降水也通过增加SWC和植物多样性间接增强了EMF。土壤微生物多样性通过调节植物多样性间接影响EMF。土壤pH值的增加对微生物多样性不利，并在一定程度上减弱了EMF。结果表明，土壤水分和植物多样性是半干旱草原电磁场的主要非生物和生物决定因素，强调了降水的重要影响和非生物因素的主导作用。

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引用次数: 0

Spatio-temporal variation and factors affecting European hare (Lepus europaeus) road mortality: Landcover diversity as a remedy 影响欧洲野兔（Lepus europaeus）道路死亡率的时空变化和因素：土地覆盖多样性作为补救措施

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

Global Ecology and Conservation

Pub Date : 2025-12-10 DOI: 10.1016/j.gecco.2025.e04013

Jan Hušek , Jana Kvičerová , Jan Cukor

Mortality caused by animal-vehicle collisions is one of the major effects of growing road networks and traffic on wildlife. Our goal was to describe seasonal and spatial distributions and to test the effects of selected factors on the probability of vehicle collisions for the European hare, a species with a rapidly declining population, which had not been studied until now. We monitored collisions during 192 surveys on an 83.9 km-long route east of Prague, Czech Republic, from February 2022 to June 2024. The seasonality of vehicle collisions reflected the breeding season and showed inter-annual variations. We identified 3 hotspots of ≥ 10.8 vehicle collisions when using a buffer zone of 5 km, two of them fully overlapping with hotspots identified at a smaller scale. The probability of hare-vehicle collisions increased in localities farther away from urban areas, forests, and seminatural vegetation. We conclude that increasing land cover diversity may be a simple mitigation measure for reducing hare road mortality. Road signs may be used to alert drivers to moving hares at hotspots of road mortality.

动物与车辆碰撞造成的死亡是日益增长的道路网络和交通对野生动物的主要影响之一。我们的目标是描述季节和空间分布，并测试选定因素对欧洲野兔的车辆碰撞概率的影响，欧洲野兔是一个种群数量迅速下降的物种，直到现在才被研究过。从2022年2月到2024年6月，我们在捷克共和国布拉格以东83.9公里长的路线上进行了192次调查，监测了碰撞情况。车辆碰撞的季节性反映了繁殖季节，并表现出年际变化。当使用5 km的缓冲区时，我们确定了3个≥ 10.8次车辆碰撞的热点，其中两个与较小范围内识别的热点完全重叠。在远离市区、森林和半自然植被的地方，野兔碰撞的概率增加。我们得出结论，增加土地覆盖多样性可能是降低公路死亡率的一种简单的缓解措施。在道路死亡率高的地区，道路标志可以用来提醒司机注意移动的野兔。

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引用次数: 0

Amphibian diversity and distribution patterns in Chaohu Lake basin based on environmental DNA and traditional line transect method 基于环境DNA和传统样线法的巢湖流域两栖动物多样性及分布格局

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

Global Ecology and Conservation

Pub Date : 2025-12-10 DOI: 10.1016/j.gecco.2025.e04011

Xiaoxuan Sun , Nengwen Xiao , Xiaoqi Gao , Ningning Guo , Zhaosheng Chu , Qiang Liu

Amphibians are a crucial component of global biodiversity, yet they are experiencing rapid population declines worldwide. The primary objectives are to evaluate the feasibility of using eDNA as a non-invasive method for surveying amphibian diversity in Chaohu Lake basin, to analyze the community characteristics of amphibians across different habitats, and to explore the key factors influencing amphibian diversity and distribution patterns in the region. This study employed environmental DNA (eDNA) combined with traditional line transect method (TLTM) to conduct a comprehensive assessment of amphibian diversity within Chaohu Lake basin protected area in four different habitats of river, wetland, cropland, and pond. Across the 40 survey sites, a total of 9 amphibian species were detected by both methods, with the eDNA method identifying significantly higher amphibian richness than the TLTM. Species richness in river habitats was significantly lower than in pond and wetland habitats, while species richness in cropland habitats showed no significant difference from the other three habitats. The Fejervarya multistriata exhibited a consistent advantage across all habitats, while the Rana zhenhaiensis, and Rana culaiensis, showed a preference for pond habitats, and Bufo gargarizans was more frequently found in river habitats. During autumn, the results obtained from both methods were comparable across the four habitat types, whereas in spring, the eDNA method demonstrated superior performance to TLTM. Amphibian species richness and abundance were higher in spring compared to autumn. Water width significantly influenced amphibian distribution both in spring and autumn, with additional impacts from water temperature and pH in spring. This study underscores the differences in community structure and dominant species across the four habitat types, revealing that amphibian diversity and distribution patterns are shaped by multiple environmental factors. The findings confirm that eDNA is an effective method for surveying amphibian diversity in Chaohu Lake basin.

两栖动物是全球生物多样性的重要组成部分，但它们在世界范围内的数量正在迅速下降。本研究的主要目的是评估eDNA作为一种非侵入性方法调查巢湖流域两栖动物多样性的可行性，分析不同生境两栖动物的群落特征，探讨影响该地区两栖动物多样性和分布格局的关键因素。本研究采用环境DNA （environmental DNA, eDNA）结合传统样线法（line样线法，TLTM）对巢湖流域保护区内河流、湿地、农田和池塘4种不同生境的两栖动物多样性进行了综合评价。在40个调查点中，两种方法共检测到9种两栖动物，eDNA方法鉴定出的两栖动物丰富度明显高于TLTM方法。河流生境的物种丰富度显著低于池塘和湿地生境，农田生境的物种丰富度与其他3种生境差异不显著。在所有生境中均表现出一致的优势，镇海蛙和culaiensis对池塘生境表现出偏好，而gargarizans更常在河流生境中发现。在秋季，两种方法的结果在四种生境类型中具有可比性，而在春季，eDNA方法的表现优于TLTM方法。春季两栖动物物种丰富度和丰度高于秋季。水体宽度对春季和秋季两栖动物分布均有显著影响，春季水温和pH值对两栖动物分布有额外影响。该研究强调了四种生境类型中两栖动物群落结构和优势种的差异，揭示了多种环境因素对两栖动物多样性和分布格局的影响。结果表明，eDNA是调查巢湖流域两栖动物多样性的有效方法。

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引用次数: 0

Shifting patterns of ecosystem service trade-offs and synergies: Evidence from the Yangtze River Economic Belt, China 生态系统服务权衡与协同效应的转移模式：来自长江经济带的证据

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

Global Ecology and Conservation

Pub Date : 2025-12-09 DOI: 10.1016/j.gecco.2025.e04020

Zeyang Xie , Liujie He , Wei Wan , Xu Song , Zhijian Wu , Han Liang , Haijiao Du , Meiyun Qin , Yuanqiao Xiong , Yuqi Qian , Bofu Zheng , Jinqi Zhu

Understanding the trade - offs and synergies among ecosystem services (ESs) is crucial for effective ecosystem management, yet most current research fails to capture the intricate, non - linear transitions, and sudden changes triggered when driving factors exceed critical thresholds. These relationships exhibit pronounced spatial heterogeneity due to the varying influence and interactions of biophysical assocaited with socio-economic drivers. This study investigates the spatiotemporal variations in three key ESs—water yield (WY), soil conservation (SC), and carbon sequestration (CS)—across the Yangtze River Economic Belt (YEB) from 2000 to 2020. Using Multiscale Geographically Weighted Regression and Piecewise Structural Equation Modeling, we analyzed the spatial distribution of ESs trade-offs/synergies and the threshold effects of driving factors. Results show clear spatial differentiation among the YEB's upstream, midstream, and downstream regions. WY peaks downstream, while SC and CS are higher upstream. The WY-CS relationship shifts from trade-offs in low-elevation urban areas to synergies in high-elevation regions. WY-SC shows trade-offs in provincial capitals and northwestern part of the YEB, with synergies elsewhere. SC-CS generally exhibits strong synergies, except in the northwest (e.g., Sichuan and Chongqing province). Precipitation is the primary driver of WY, with varied topographic effects across regions. SC is shaped by natural and socio-economic factors, while CS is strongly effected by vegetation cover and climate. Path analysis reveals region-specific impact pathways: with topography exerting a dominant influence upstream, and socio-economic disturbances (e.g., nighttime light) driving patterns in the midstream and downstream. Threshold effects are evident: higher human activity and lower precipitation increase WY-CS trade-offs; flatter areas need greater disturbance to shift WY-SC from synergy to trade-off; SC-CS synergy declines above 3000 m elevation. This study highlights how spatially heterogeneous driver interactions shape ES relationships, providing insights for region-specific ecological management and sustainable development.

了解生态系统服务之间的权衡和协同作用对于有效的生态系统管理至关重要，但目前大多数研究未能捕捉到驱动因素超过临界阈值时引发的复杂、非线性转变和突然变化。由于与社会经济驱动因素相关的生物物理因素的不同影响和相互作用，这些关系表现出明显的空间异质性。以长江经济带为研究对象，研究了2000 - 2020年长江经济带3个关键生态系统——产水量（WY）、土壤保持（SC）和固碳（CS）的时空变化特征。采用多尺度地理加权回归和分段结构方程模型，分析了生态环境权衡/协同效应的空间分布和驱动因素的阈值效应。结果表明，叶林的上、中、下游区域存在明显的空间分异。WY的峰值在下游，SC和CS的峰值在上游。WY-CS关系从低海拔城市地区的权衡转变为高海拔地区的协同效应。WY-SC显示了省会城市和YEB西北部的权衡，以及其他地方的协同效应。除西北地区（如四川和重庆）外，SC-CS总体上表现出较强的协同效应。降水是WY的主要驱动因素，不同区域的地形影响不同。生态系统受自然和社会经济因素的影响，而生态系统受植被覆盖和气候的强烈影响。路径分析揭示了区域特定的影响路径：地形在上游发挥主导作用，而社会经济干扰（如夜间灯光）在中游和下游发挥主导作用。阈值效应是明显的：较高的人类活动和较低的降水增加了WY-CS权衡；较平坦的地区需要更大的干扰才能使WY-SC从协同转变为权衡；在海拔3000 m以上SC-CS协同效应下降。该研究强调了空间异质性驱动因素相互作用如何塑造ES关系，为区域特定生态管理和可持续发展提供了见解。

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引用次数: 0

Dynamic modeling of the pelagic ecosystem in the western and central Pacific Ocean based on a multispecies size-spectrum model 基于多物种尺寸谱模型的西太平洋和中太平洋中上层生态系统动态模拟

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

Global Ecology and Conservation

Pub Date : 2025-12-08 DOI: 10.1016/j.gecco.2025.e04017

Xiaodong Li , Qinqin Lin , Zhe Geng , Jiangfeng Zhu

Ecosystem models have been increasingly used for assessing and predicting the impact of fishing activities on marine ecosystems. The western and central Pacific Ocean (WCPO) is the most productive oceanic region for tunas, and its ecosystem stability is crucial for sustaining global tuna production. As a medium-complexity ecosystem model, the size-spectrum model can incorporate more ecological processes with less data, making it suitable for analyzing the dynamics of the WCPO pelagic ecosystem where data are scarce. In this study, we developed and calibrated a multispecies size-spectrum model for the pelagic ecosystem of the WCPO based on publicly available fisheries statistics and Chinese tuna longline observer data. Six ecological indicators were used to reflect the dynamic changes in ecosystem structure, including total biomass, large fish index (LFI), mean maximum weight, maximum weight, mean trophic level (MTL), and slope of community size-spectrum. Additionally, we conducted a projection of species biomass and ecosystem structure over the next decade under different fishing scenarios: 0, 0.2 F, 0.5 F, F (average fishing mortality coefficient from 2018 to 2021), 2 F, and 5 F. The validation results indicated that for most species, there was a strong consistency between the catches predicted by the calibrated model and the reported catches. Projections indicated that even if fishing intensity remains at recent levels (F) or is reduced (0.2 F and 0.5 F), the biomass of tuna species(albacore, yellowfin and bigeye tuna) other than skipjack tuna will continue to decline to varying degrees. With regard to ecological indicators, a clear inverse correlation was observed between the increase in fishing intensity and six ecological indicators, especially the slope of community size-spectrum. Our results suggested that conservation and management measures will need to be continually adjusted in future fisheries management to ensure ecosystem stability and sustainable development of fishery resources. The results of our study can serve as a scientific reference for conducting ecological impact assessments of tuna fisheries in the WCPO, as well as for promoting the sustainable exploitation of tuna stocks.

生态系统模型越来越多地用于评估和预测渔业活动对海洋生态系统的影响。西太平洋和中太平洋（WCPO）是金枪鱼产量最高的海洋区域，其生态系统的稳定对维持全球金枪鱼产量至关重要。作为一种中等复杂程度的生态系统模型，尺寸谱模型可以用较少的数据包含更多的生态过程，适合分析数据稀缺的WCPO远洋生态系统的动态。在这项研究中，我们基于公开的渔业统计数据和中国金枪鱼延绳钓观测数据，建立并校准了WCPO远洋生态系统的多物种尺寸谱模型。利用总生物量、大型鱼类指数（LFI）、平均最大重、最大重、平均营养级（MTL）和群落规模谱斜率等6个生态指标反映了生态系统结构的动态变化。此外，我们还对未来十年不同捕捞情景下的物种生物量和生态系统结构进行了预测：0、0.2 F、0.5 F、F（2018 - 2021年平均捕捞死亡率系数）、2 F和5 F。验证结果表明，对于大多数鱼种，校正模型预测的渔获量与报告的渔获量具有较强的一致性。预测表明，即使捕捞强度保持在最近的水平(F)或降低（0.2 F和0.5 F），除鲣鱼以外的金枪鱼物种（长鳍金枪鱼、黄鳍金枪鱼和大眼金枪鱼）的生物量将继续不同程度地下降。在生态指标方面，捕捞强度的增加与6个生态指标呈明显的负相关，尤其是群落规模谱斜率。研究结果表明，在未来的渔业管理中，需要不断调整保护管理措施，以确保生态系统的稳定和渔业资源的可持续发展。研究结果可为WCPO金枪鱼渔业生态影响评估及促进金枪鱼资源的可持续开发提供科学参考。

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引用次数: 0