Anthropocene最新文献_第5页

The effects of seaweed and shellfish mariculture on the fecal carbon flux of zooplankton in a mariculture base of southern China: Implications for the biological pump 海藻和贝类养殖对华南海水养殖基地浮游动物粪便碳通量的影响：对生物泵的启示

IF 3.9 2区地球科学 Q2 ENVIRONMENTAL SCIENCES

Anthropocene

Pub Date : 2025-09-01 Epub Date: 2025-08-13 DOI: 10.1016/j.ancene.2025.100491

Jieli Li, Ruzhong Weng, Yufeng Yang, Qing Wang

Zooplankton play a pivotal role in the marine ecosystem, with their fecal pellets constituting the primary component of passively sinking particles in the ocean. The sinking of fecal pellets provides an effective vector for the transfer and sequestration of particulate organic carbon in the sea. Mariculture activities are extensively practiced along the coastline of China. We hypothesized that seaweed and shellfish mariculture would differentially affect zooplankton community structure and fecal carbon flux due to differences in habitat provision and food source. Aimed to test this hypothesis, surveys were carried out in different mariculture areas around Nan'ao Island in the South China Sea from March to June 2023 during seaweed Gracilaris lemaneiformis cultivation. A total of 36 zooplankton species were identified, including 27 copepod species. Zooplankton abundance ranged from 500 to 2760 ind. m⁻³, with the highest abundance observed in the G.lemaneiformis cultivation area (P < 0.05). Furthermore, the Shannon-Wiener diversity index of the zooplankton community in the G.lemaneiformis area surpassed that of the shellfish and control areas (P < 0.05). The abundance of zooplankton fecal pellets fluctuated between 12 and 283 pellets m⁻³, and the fecal pellet carbon flux ranged from 0.004 to 0.976 mg C m⁻² d⁻¹. The fecal pellet abundance and carbon flux of zooplankton peaked in the G.lemaneiformis cultivation area (P < 0.05). Results showed mariculture activities affect zooplankton community structure and their fecal pellet carbon flux; the large-scale cultivation of G.lemaneiformis enhances zooplankton diversity and effectively increases the carbon flux of fecal pellets in the coastal waters. These findings could provide new management strategies for mariculture environments with increasing anthropogenic stressors in the Anthropocene Epoch.

浮游动物在海洋生态系统中起着举足轻重的作用，它们的粪便颗粒是海洋被动下沉颗粒的主要组成部分。粪便颗粒的沉降为海洋中颗粒有机碳的转移和固存提供了有效载体。中国沿海地区广泛从事海水养殖活动。我们假设海藻和贝类养殖对浮游动物群落结构和粪便碳通量的影响是不同的，这是由于栖息地条件和食物来源的不同。为了验证这一假设，我们于2023年3月至6月在南海南澳岛周围不同的海水养殖区进行了调查。共鉴定出浮游动物36种，其中桡足类27种。浮游动物丰度在500 ~ 2760 ind. m - 3之间，其中以羊草养殖区丰度最高（P <； 0.05）。此外，lemaneiformis区浮游动物群落的Shannon-Wiener多样性指数超过贝类和对照区（P <； 0.05）。浮游动物粪球丰度在12 ~ 283粒m−3之间波动，碳通量在0.004 ~ 0.976 mg C m−2 d−1之间波动。浮游动物粪便颗粒丰度和碳通量在羊草养殖区最高（P <； 0.05）。结果表明：海水养殖活动影响浮游动物群落结构及其粪球碳通量；大规模养殖lemaneiformis增加了浮游动物的多样性，有效增加了沿海水域粪便颗粒的碳通量。这些发现可以为人类世时期日益增加的人为压力的海水养殖环境提供新的管理策略。

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引用次数: 0

Aggregated multivariate environmental risk (AMER) index and predictive models for heavy metal pollution trends in ecosystems 生态系统重金属污染趋势的综合多元环境风险指数及预测模型

IF 3.3 2区地球科学 Q2 ENVIRONMENTAL SCIENCES

Anthropocene

Pub Date : 2025-09-01 Epub Date: 2025-07-03 DOI: 10.1016/j.ancene.2025.100482

Abeer A. Moneer, Mohamed Khedawy, Ola E. Abdelwahab, Hoda H.H. Ahdy, Mohamed Amer

Heavy metal (HM) contamination in estuarine sediments represents a critical environmental challenge, with profound implications for ecosystem health and human safety. To address this pressing issue, proactive monitoring and predictive modeling have emerged as essential tools. This study investigates the application of three predictive models—Grey Model (GM (1,1)), Autoregressive Integrated Moving Average (ARIMA), and Exponential Smoothing (ES)—to analyze historical and current data on eight key HMs (Cu, Zn, Cd, Pb, Ni, Cr, Mn, and Fe) in sediment samples from the Rosetta and Damietta estuaries in Egypt. Utilizing these models, five-year contamination trends were forecasted, incorporating both single-element pollution indices (SEPIs) and multiple-element pollution indices (MEPIs) to evaluate pollution levels and elucidate complex metal interactions. Furthermore, this study introduces a new MEPI, the Aggregated Multivariate Environmental Risk (AMER) index, derived from Principal Component Analysis (PCA). The AMER index demonstrated approximately 20 % higher responsiveness—measured by earlier detection and greater sensitivity to pollution fluctuations—compared to traditional multimetal indices such as PERI. Among the models evaluated, ES exhibited the highest predictive accuracy, achieving a mean absolute percentage error (MAPE) of 6.3 % for Cu predictions. Significant positive correlations were identified between Pb and Ni (r = 0.77, p < 0.05) in Damietta and Cu and Zn (r = 0.65, p < 0.05) in Rosetta, suggesting common pollution sources. The five-year forecasts indicate a declining trend for most metals, reflecting the efficacy of recent pollution control measures. This integrated modeling approach provides enhanced pollution assessment and forecasting capabilities, offering valuable insights for the development of sustainable estuarine management strategies.

河口沉积物中的重金属污染是一个严峻的环境挑战，对生态系统健康和人类安全具有深远的影响。为了解决这个紧迫的问题，主动监测和预测建模已经成为必不可少的工具。本文研究了灰色模型（GM(1,1)）、自回归综合移动平均（ARIMA）和指数平滑（ES）三种预测模型的应用，分析了埃及罗塞塔和达米埃塔河口沉积物样品中8种关键hm （Cu、Zn、Cd、Pb、Ni、Cr、Mn和Fe）的历史和当前数据。利用这些模型，利用单元素污染指数（SEPIs）和多元素污染指数（mepi）来评价污染水平并阐明复杂的金属相互作用，预测了5年的污染趋势。此外，本研究引入了一个新的MEPI，即综合多元环境风险（AMER）指数，该指数来源于主成分分析（PCA）。与传统的多金属指数（如PERI）相比，AMER指数显示出大约20% %的高响应性（通过早期检测和对污染波动的更大灵敏度来测量）。在评估的模型中，ES表现出最高的预测精度，Cu预测的平均绝对百分比误差（MAPE）为6.3 %。Damietta地区的Pb和Ni （r = 0.77,p <； 0.05）与Rosetta地区的Cu和Zn （r = 0.65,p <； 0.05）呈显著正相关，表明两者存在共同的污染源。五年预测显示，大多数金属的价格呈下降趋势，反映出近期污染控制措施的效果。这种综合建模方法提供了增强的污染评估和预测能力，为可持续河口管理策略的发展提供了有价值的见解。

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引用次数: 0

Optimization of functional zoning and spatial patterns of water conservation on the Qinghai-Tibetan Plateau under different SSP-RCP scenarios 不同SSP-RCP情景下青藏高原水土保持功能分区与空间格局优化

IF 3.3 2区地球科学 Q2 ENVIRONMENTAL SCIENCES

Anthropocene

Pub Date : 2025-09-01 Epub Date: 2025-06-15 DOI: 10.1016/j.ancene.2025.100479

Yuxin Wang , Yulin Song , Xiaohong Deng , Zongxing Li

The Qinghai-Tibetan Plateau (QTP) is known as the water tower of Asia, and its water conservation has an important impact on China and even on South, Southeast, and Central Asia. Currently, the water conservation is unstable due to climate and anthropogenic impacts. Strengthening the water conservation of the QTP is crucial for coping with climate change and maintaining the stability of the downstream water supply. Based on the raster data of 2000, 2005, 2010, 2015, and 2020, this study employed the Bayesian network to assess the water conservation on the QTP, and to determine key variables and states that affect water conservation. Finally, we identified the optimized zones under the SSP-RCP scenarios for the years 2021–2100 through grid coding analysis. The results show that: (1) The water conservation of the QTP shows a decreasing trend from the southeast to the northwest. The average value of Yarlung Tsangpo River Basin (YTRB) and Three-Rivers Source Region (TRSR) were 36.47 % and 24.93 % higher than that of the QTP. (2) Precipitation, land use, and potential evapotranspiration contribute more than 1 percent to water conservation and are key variables. (3) The QTP can be divided into four ecological subzones in future scenarios. Among them, the area proportion of ecological conservation zone increases by an average of 7.65 %, and the area proportion of ecological control zone decreases by an average of 8.38 %. Targeted management strategies can be implemented in these distinct zones. The research methodology of this paper can be extended to other regions to enhance water conservation, which has practical guiding value for optimizing the ecological engineering layout and ecosystem management on the QTP.

青藏高原被誉为“亚洲水塔”，其水资源涵养对中国乃至南亚、东南亚、中亚地区具有重要影响。目前，由于气候和人为影响，水资源保护是不稳定的。加强三峡库区水资源涵养，对应对气候变化、维护下游供水稳定具有重要意义。基于2000年、2005年、2010年、2015年和2020年的栅格数据，采用贝叶斯网络对青藏高原的水资源涵养进行了评价，确定了影响水资源涵养的关键变量和状态。最后，通过网格编码分析，确定了SSP-RCP情景下2021-2100年的优化区域。结果表明：(1)青藏高原水分涵养量自东南向西北呈递减趋势；雅鲁藏布江流域（YTRB）和三江源区（TRSR）的平均值分别比QTP高36.47 %和24.93 %。(2)降水、土地利用和潜在蒸散对保水的贡献大于1%，是关键变量。(3) QTP在未来情景下可划分为4个生态分区。其中，生态涵养区面积占比平均增加7.65 %，生态控制区面积占比平均减少8.38 %。有针对性的管理策略可以在这些不同的区域实施。本文的研究方法可推广到其他地区加强节水，对优化青藏高原生态工程布局和生态系统管理具有实践指导价值。

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引用次数: 0

Under threat: Land use change, distribution and conservation of poorly-known endemic microsnails from the coast of Chile 面临威胁：智利海岸鲜为人知的地方性微型蜗牛的土地利用变化、分布和保护

IF 3.3 2区地球科学 Q2 ENVIRONMENTAL SCIENCES

Anthropocene

Pub Date : 2025-09-01 Epub Date: 2025-07-24 DOI: 10.1016/j.ancene.2025.100486

Gonzalo A. Collado , Juan Francisco Araya , Viviana Castillo , Nicolás I. Villalobos

Mollusks are among the most affected groups in the current extinction crisis, with rates surpassing those of other taxa combined. This is compounded by limited knowledge of many groups and a high proportion of endemic species restricted to small geographic areas. We assessed the vulnerability of six Chilean terrestrial punctoid microsnails by combining species distribution maps with land use, ecosystem, and protected area layers, and by developing semi-quantitative and quantitative vulnerability indices integrating these data with information on habitat, current distributions, and potential future scenarios of climate change and human pressures. We tested the hypothesis that endemic microsnail from the Chilean coast are threatened by the overlap of their distributions with areas of intense anthropogenic pressure, expected to expand under future climate change. Conservation status of species was evaluated using IUCN Red List and NatureServe criteria. Results show significant variation in habitat conditions and threats across species' biogeographical regions. Primary threats encompass habitat loss and fragmentation, wildfires, droughts, and land use changes from urban expansion, agriculture, and forestry, collectively limiting dispersal and increasing vulnerability. Although both climate and composite vulnerability indices vary among species, the former forecasts future exposure to drought and warming, while the latter reflects current ecological traits, anthropogenic pressures, and protection gaps, revealing additional risks and facilitating targeted conservation efforts. Under IUCN criteria, five species qualify as Critically Endangered and one as Endangered. All species are categorized as Critically Imperiled by NatureServe. This assessment underscores the need for habitat protection and sustainable land use in conservation.

在当前的灭绝危机中，软体动物是受影响最大的群体之一，其灭绝率超过了其他分类群的总和。由于对许多群体的认识有限，以及局限于小地理区域的特有物种比例很高，情况更加复杂。我们将物种分布图与土地利用、生态系统和保护区层相结合，并将这些数据与栖息地、当前分布、气候变化和人类压力的潜在未来情景信息相结合，开发了半定量和定量脆弱性指数，对智利6种陆生点状微蜗牛的脆弱性进行了评估。我们验证了这样一个假设，即智利海岸特有的微型蜗牛受到其分布与强烈人为压力地区重叠的威胁，预计在未来气候变化下会扩大。采用世界自然保护联盟红色名录和自然保护区标准对物种的保护状况进行了评估。结果表明，不同生物地理区域的生境条件和威胁存在显著差异。主要威胁包括栖息地丧失和破碎化、野火、干旱以及城市扩张、农业和林业带来的土地利用变化，这些因素共同限制了物种的扩散并增加了脆弱性。气候脆弱性指数和综合脆弱性指数均因物种而异，前者预测未来的干旱和变暖风险，后者反映当前的生态特征、人为压力和保护缺口，揭示额外的风险，促进有针对性的保护工作。根据世界自然保护联盟的标准，五种物种被列为极度濒危物种，一种被列为濒危物种。所有物种都被自然保护区列为极度濒危物种。这一评估强调了生境保护和可持续土地利用的必要性。

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引用次数: 0

Sediment magnetism records of anthropogenic impact on a typical alpine lake in southeastern Tibetan Plateau 青藏高原东南部典型高寒湖泊人为影响的沉积物磁学记录

IF 3.9 2区地球科学 Q2 ENVIRONMENTAL SCIENCES

Anthropocene

Pub Date : 2025-09-01 Epub Date: 2025-08-05 DOI: 10.1016/j.ancene.2025.100487

Yuhan Li , Wenshan Yang , Huan Fu , Yongdong Zhang , Tingping Ouyang

Alpine lakes provide a valuable opportunity for studying anthropogenic airborne contamination due to the absence of direct human activities in their catchments. However, to date, few in-depth investigations have employed magnetic proxies to assess anthropogenic impacts on these lakes. In this study, we analyzed the magnetic characteristics of a dated sediment core from Lake Jiren, a typical alpine lake in the southeastern margin of the Tibetan Plateau, to elucidate when, how, and to what extent anthropogenic contamination has impacted the lake basin. The results indicate that the magnetic minerals in the core are mainly composed of magnetite, with hematite accounting for a small percentage. In sediments deposited prior to ca. 1933 AD, low values of magnetic concentration-dependent proxies (χ_lf, χ_ARM, and SIRM) and relatively abundant detrital hematite reflect a dominant input of locally derived magnetic minerals to the lake, implying a relatively pristine environment with minimal anthropogenic impact. The relatively low χ_ARM/χ_lf and χ_ARM/SIRM ratios indicate coarser magnetic particles, likely resulting from the weathering of the bedrock in the basin. For sediments deposited after ca. 1947 AD, the values of χ_ARM/χ_lf and χ_ARM/SIRM ratios increased, pointing to a finer size of the magnetic particles. This change, along with the marked increase in SIRM and S_-300, suggests an important shift in the source of magnetic particles, indicating a notable anthropogenic contribution—most likely from airborne deposition of anthropogenic magnetic materials over the lake basin, followed by surface runoff to the lake. This transition temporally coincides with large-scale industrial development, such as mining, in southwestern China. A causal relationship is plausible, considering that the magnetic minerals generated by industrial activities have a high potential to be transported to adjacent alpine lakes through atmospheric processes. This study demonstrates that magnetic proxies, which can be acquired rapidly, non-destructively, and cost-effectively, are highly sensitive indicators of anthropogenic airborne contamination in alpine lakes.

高山湖泊由于其集水区没有直接的人类活动，为研究人为空气污染提供了宝贵的机会。然而，迄今为止，很少有深入的研究利用磁代用物来评估这些湖泊的人为影响。本文通过对青藏高原东南缘典型的高寒湖泊积仁湖沉积物岩心的磁性特征分析，阐明了人为污染在何时、如何以及在多大程度上影响了该湖盆。结果表明，岩心中磁性矿物以磁铁矿为主，赤铁矿占比较小。在大约1933年以前沉积的沉积物中，低磁场浓度相关指标（χ f、χARM和SIRM）和相对丰富的碎屑赤铁矿反映了主要的本地磁性矿物输入湖泊，这意味着相对原始的环境，人为影响最小。χARM/χlf和χARM/SIRM比值较低，表明盆地基岩的风化作用导致磁性颗粒较粗。对于大约1947年以后沉积的沉积物，χARM/χlf和χARM/SIRM比值增大，表明磁性颗粒的尺寸变小。这种变化，以及SIRM和S-300的显著增加，表明磁性颗粒的来源发生了重要变化，表明了显著的人为贡献——最有可能来自湖盆上空人为磁性物质的空气沉积，然后是地表径流。这种转变与中国西南地区的大规模工业发展（如采矿业）在时间上一致。考虑到工业活动产生的磁性矿物极有可能通过大气过程输送到邻近的高山湖泊，因果关系似乎是合理的。该研究表明，磁指标可以快速、无损、经济地获得，是高寒湖泊人为空气污染的高度敏感指标。

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引用次数: 0

Pastoralism and mining activities affecting timberline ecosystems in the Italian Alps during the last millennia 在过去的一千年里，畜牧业和采矿活动影响了意大利阿尔卑斯山的树带线生态系统

IF 3.3 2区地球科学 Q2 ENVIRONMENTAL SCIENCES

Anthropocene

Pub Date : 2025-09-01 Epub Date: 2025-06-06 DOI: 10.1016/j.ancene.2025.100478

Giulia Furlanetto , Renata Perego , Marco Stefano Caccianiga , Roberto Comolli , Laura Ferigato , Giulia Frigerio , Cesare Ravazzi

Historical ecology and palaeoecology provide a key for understanding the last millennia’s landscape changes, by reconstructing the chain of ecological/anthropogenic events that generated the current dynamics of the living systems. We analysed co-registered bio- and geoecological proxies (micro-botanical data, charcoal fragments, elemental abundance, nutrients), retrieved from a subalpine mire in Valmalenco, Italian Alps, to infer the main environmental transformations that led to the current larch-parkland-pasture landscape typical of timberline elevations in the Alps. The radiocarbon-dated record begins ca. BC 1300 with a primary forest formed by Pinus cembra, Picea excelsa and Larix decidua already affected by anthropogenic disturbance. Human impact increases during Early Iron Age with the development of mining activities and pastoralism. Local fires occurred in the Iron-Roman Ages; but from AD 1035, the primary forest experiences a definitive collapse to clear space for pastures during a climatically favourable phase. Lead enrichment unravels smelting activities that contributed to century-scale human impact increase. Critical minerogenic intake in Spundascia’s mire are related to the severe environmental conditions established during the Little Ice Age. In the Modern Age, pasture is carried even within the mire, as indicated by abundance of spores of coprophilous fungi. In conclusion, it is the last millennium of mostly anthropogenic drivers, enhanced by positive climate feedback, which overturned the ecological trajectories towards the modern setting of pasture intensity, eutrophication and fire disturbance.

历史生态学和古生态学通过重建产生当前生命系统动态的生态/人为事件链，为理解过去千年的景观变化提供了一把钥匙。我们分析了从意大利阿尔卑斯山Valmalenco亚高山沼泽中提取的生物和地球生态指标（微植物学数据、木炭碎片、元素丰度、营养物质），以推断导致阿尔卑斯山当前典型的落叶松-公园-牧场景观的主要环境转变。放射性碳定年记录始于公元前1300年左右，由松、云杉和落叶松形成的原始森林已经受到人为干扰。在早期铁器时代，人类的影响随着采矿活动和畜牧业的发展而增加。当地的火灾发生在铁器罗马时代；但从公元1035年开始，在气候有利的阶段，原始森林经历了一次决定性的崩溃，为牧场腾出了空间。铅富集揭示了导致百年人类影响增加的冶炼活动。Spundascia沼泽的临界成矿摄取量与小冰期形成的恶劣环境条件有关。在现代，牧草甚至被带进沼泽，这是由大量的粪菌孢子所表明的。综上所述，在气候正反馈的推动下，以人为驱动因素为主的最后一千年颠覆了放牧强度、富营养化和火灾干扰等现代环境的生态轨迹。

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引用次数: 0

Uncovering the co-evolution of land use change and ecosystem services in Shandong of China 山东省土地利用变化与生态系统服务的协同演化

IF 3.9 2区地球科学 Q2 ENVIRONMENTAL SCIENCES

Anthropocene

Pub Date : 2025-09-01 Epub Date: 2025-08-09 DOI: 10.1016/j.ancene.2025.100488

Zhengxin Zhang, Xiaogang Shi, Jiren Xu, Md Sarwar Hossain

Many studies have explored the relationships between ecosystem services (ES) and land use/ land cover (LULC) changes but understanding the synergistic evolution of their complex socio-ecological dynamics is still limited in China. This study provides a comprehensive time-series analysis of ES and LULC spanning 1950–2022 in Shandong of China, offering valuable insights into the sustainability of social-ecological systems. We derived evolutionary trends by analysing satellite map data, official government data, and literature data; developing a conceptual model of causal feedback of LULC and ES by the Granger causality test; analysed the relationships of ES with LULC and GDP using the Environmental Kuznets Curve (EKC) model and sequential principal component analysis. The trend analysis reveals that urban sprawl is increasingly encroaching on most of the natural land, especially agricultural land, posing a serious threat to food security. The EKC modelling demonstrates that economic growth continues to fuel urban expansion without reaching a tipping point. Our conceptual model suggests that urbanization increases the demand for provisioning services, deteriorating key regulating services, in a synergistic relationship with tourism. Wetland loss further exacerbates annual precipitation decline, triggering negative feedback with temperature and drought, leading to the degradation of shrubs and grasslands. Ultimately, these factors collectively undermine regional ecosystem resilience. Our results suggest that the socio-ecological systems in Shandong experienced weakening connectivity and heightened vulnerability between 1980 and 2022, indicating a shift toward functional disturbance and possible reorganization, with the possibility of approaching tipping point. Our findings provide valuable insights for policymakers in China and other global mountains for land management and ecosystem restoration to avoid the collapse of social-ecological systems.

许多研究已经探讨了生态系统服务（ES）与土地利用/土地覆盖（LULC）变化之间的关系，但对两者复杂的社会生态动态的协同演化的理解仍然有限。本研究对山东省1950-2022年的ES和LULC进行了全面的时间序列分析，为社会生态系统的可持续性提供了有价值的见解。我们通过分析卫星地图数据、官方政府数据和文献数据得出进化趋势；通过格兰杰因果检验建立了LULC和ES因果反馈的概念模型；利用环境库兹涅茨曲线（EKC）模型和序贯主成分分析，分析了ES与LULC和GDP的关系。趋势分析表明，城市扩张日益侵占大部分自然用地，特别是农业用地，对粮食安全构成严重威胁。EKC模型表明，经济增长继续推动城市扩张，但没有达到临界点。我们的概念模型表明，城市化增加了对提供服务的需求，在与旅游业的协同关系中恶化了关键的调节服务。湿地的丧失进一步加剧了年降水量的减少，与温度和干旱产生负反馈，导致灌木和草地退化。最终，这些因素共同破坏了区域生态系统的恢复能力。研究结果表明，1980 - 2022年，山东省社会生态系统的连通性减弱，脆弱性增加，预示着功能紊乱和重组的转变，并有可能接近临界点。研究结果为中国和全球其他山区的决策者提供了宝贵的土地管理和生态系统恢复建议，以避免社会生态系统的崩溃。

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引用次数: 0

The impact of species invasion and nutrient dynamics on organic carbon burial in lake ecosystems 物种入侵及养分动态对湖泊生态系统有机碳埋藏的影响

IF 3.9 2区地球科学 Q2 ENVIRONMENTAL SCIENCES

Anthropocene

Pub Date : 2025-09-01 Epub Date: 2025-08-31 DOI: 10.1016/j.ancene.2025.100492

Dandan Yang , Taohui Li , Guoliang Lei , Qiaohua Han , Jiqing Yin , Yunxia Ma , Qiushi Liang , Yiqin Cao , Wenxiang Zhang

The invasion of Neosalanx taihuensis (Nt) into Yunnan Plateau lakes since the late 1970s has profoundly altered biogeochemical cycles and disrupted ecological equilibrium. While climate variability influences native species resilience, the impact of invasive species on carbon burial in these spatially heterogeneous lakes remains poorly quantified. We combine binary and structural equation modeling (SEM) to explore the mechanisms by which species invasion and lake nutrient dynamics drive carbon burial. Results indicate that organic carbon accumulation rates (OCAR) in Yunnan Plateau lakes range from 3.74 g·m⁻²·yr⁻¹ to 148.23 g·m⁻²·yr⁻¹, with more than tripled in four lakes over the past 60 years. Stable isotopes and C/N ratio confirm a post-invasion shift from allochthonous to endogenous organic matter dominance. Notably, Nt exerts a stronger direct effect on OCAR (path coefficient 0.273, p < 0.001) than climate, mediated by nutrient release and planktonic regime shifts. Meanwhile, invasive species amplify organic carbon burial (OCB) via the invasion-eutrophication feedback. These findings highlight how lake hydrology, basin climate and nutrient level directly regulate OCAR while indirectly modulate it through Nt biomass. Furthermore, invasive species act as biogeochemical engineers, reshaping carbon sink dynamics through biotic forcing. This study establishes a predictive framework for assessing climate-invasion synergies in vulnerable plateau lake ecosystems, offering key insights for ecosystem management and conservation.

20世纪70年代末以来，太湖新salanx （nesalanx taihuensis, Nt）入侵云南高原湖泊，深刻地改变了生物地球化学循环，破坏了生态平衡。虽然气候变率影响本地物种的恢复力，但入侵物种对这些空间异质性湖泊碳埋藏的影响仍然缺乏量化。结合二元模型和结构方程模型（SEM），探讨物种入侵和湖泊营养动态驱动碳埋藏的机制。结果表明，云南高原湖泊的有机碳累积速率（OCAR）在3.74 g·m−2·yr−1 ~ 148.23 g·m−2·yr−1之间，其中4个湖泊的OCAR在过去60年中增加了两倍以上。稳定同位素和碳氮比证实了入侵后由外来有机质为主向内源有机质为主的转变。值得注意的是，Nt对OCAR的直接影响（通径系数0.273,p <； 0.001）比气候更强，这是由养分释放和浮游状态转变介导的。同时，入侵物种通过入侵-富营养化反馈放大有机碳埋藏（OCB）。这些发现强调了湖泊水文、流域气候和营养水平如何直接调节OCAR，并通过Nt生物量间接调节OCAR。此外，入侵物种充当生物地球化学工程师，通过生物强迫重塑碳汇动态。本研究为评估高原湖泊脆弱生态系统的气候入侵协同效应建立了预测框架，为生态系统管理和保护提供了重要见解。

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引用次数: 0

Spatiotemporal evolution and attribution of urban exposure to compound precipitation and wind speed extremes in China since 1980 1980年以来中国城市复合降水和极端风速暴露的时空演变与归因

IF 3.9 2区地球科学 Q2 ENVIRONMENTAL SCIENCES

Anthropocene

Pub Date : 2025-09-01 Epub Date: 2025-08-14 DOI: 10.1016/j.ancene.2025.100489

Liling Chu , Chao He , Yang Jiang

Frequent compound precipitation and wind speed extremes (CPW) increasingly threaten urban sustainability in China. This study comprehensively investigated the spatiotemporal evolution patterns and drivers of CPW in 355 cities in China from 1980 to 2018 based on China meteorological forcing dataset and China land cover dataset with inter-decadal trend analyses and exposure risk decomposition. The study revealed that from 1980 to 2018, 45 % of cities saw rising CPW frequency and intensity, while 60 % exhibited increased CPW risk. Notably, half of the cities with increasing trends showed sustained rises, primarily concentrated in northern and western China. Attribution analysis indicated that urbanization contributes to the increased risk of CPW while climate change and interactions are multidirectional. Specifically, the effect of climate change and interactions led to an increase in CPW risk in more than 40 % of cities, while urbanization led to an increase in CPW risk in more than 35 % of cities. However, the impacts of the drivers were spatially heterogeneous. Climate change and interactions dominate CPW contributions in northern, northwestern, North China, southwestern, and southern coastal areas of China, while urbanization dominates in the northeastern, eastern North China, eastern China, central China, and southeastern coastal areas.

频繁的复合降水和极端风速（CPW）日益威胁着中国城市的可持续性。基于中国气象强迫数据和中国土地覆盖数据，采用年代际趋势分析和暴露风险分解方法，对1980 - 2018年中国355个城市CPW的时空演变特征及其驱动因素进行了综合研究。研究显示，从1980年到2018年，45% %的城市CPW频率和强度上升，60% %的城市CPW风险增加。值得注意的是，有增长趋势的城市中有一半呈持续增长趋势，主要集中在中国的北部和西部。归因分析表明，城市化增加了CPW风险，而气候变化及其相互作用是多向的。具体而言，气候变化和相互作用的影响导致超过40% %的城市CPW风险增加，而城市化导致超过35% %的城市CPW风险增加。然而，驱动因素的影响具有空间异质性。气候变化和相互作用主导了华北、西北、华北、西南和华南沿海地区的CPW贡献，而城市化主导了东北、华北东部、华东、华中和东南沿海地区的CPW贡献。

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引用次数: 0

Environmental DNA reveals anthropogenic impacts on fish diversity in mountain streams and the increasing risk of species invasion 环境DNA揭示了人类活动对山涧鱼类多样性的影响和物种入侵风险的增加

IF 3.3 2区地球科学 Q2 ENVIRONMENTAL SCIENCES

Anthropocene

Pub Date : 2025-09-01 Epub Date: 2025-06-27 DOI: 10.1016/j.ancene.2025.100481

Yu Zhou , Yunchao Luo , Fan Yu , Zihong Zheng , Jidong Li , Yu Wang , Xu Wang , Jiale Cheng , Zhongqiu Li , Lin Wang , Aichun Xu

Fish diversity and population dynamics are critical to freshwater ecosystem health. However, the direct disturbance of fish communities resulting from human activities and indirect impacts during environmental modifications pose significant risks to fish diversity. In this study, we employed eDNA metabarcoding technology to investigate the diversity and distribution of fish in the main water sources of the Zhejiang Jiulongshan National Nature Reserve. A total of 11 orders, 24 families, 47 genera and 61 species of fish, including 5 exotic species, were identified. The results revealed a greater number of fish species at the lower-elevation sampling sites but greater uncertainty at the higher-elevation sampling sites. However, small numbers of exotic fish species were observed at almost all the sampling sites. Cypriniformes served as biomarkers at the sampling sites with tourism activities, whereas more unique taxonomic units, such as Siluriformes and Gobiiformes, were observed at the sampling sites without tourism activities. Many environmental factors were significantly correlated with fish community differences within and outside the core area. Notably, the mean total organic carbon (TOC) and mean chemical oxygen demand (COD) levels were 8.73 % and 17.51 % greater, respectively, in the core area than outside the core area. In contrast, the phosphate, sulfide, Fe and pH levels were greater outside the core area than inside the core area. Our study revealed anthropogenic disturbances to biological communities in freshwater ecosystems by investigating the distribution and abundance of fish OTUs. Changes in the aquatic environment and biological invasions triggered by the activities of indigenous people, ecotourism and the operation of artificial fishponds may be the main risk factors influencing fish diversity in mountain streams.

鱼类多样性和种群动态对淡水生态系统的健康至关重要。然而，人类活动对鱼类群落的直接干扰和环境变化过程中的间接影响对鱼类多样性构成了重大威胁。本研究采用eDNA元条形码技术对浙江九龙山国家级自然保护区主要水源鱼类的多样性和分布进行了研究。共鉴定出鱼类11目24科47属61种，其中外来种5种。结果表明，低海拔取样点的鱼类种类较多，而高海拔取样点的不确定性较大。然而，在几乎所有的采样点都观察到少量的外来鱼类。在有旅游活动的采样点以Cypriniformes为生物标记，而在没有旅游活动的采样点则以Siluriformes和Gobiiformes为独特的分类单位。许多环境因子与核心区内外鱼类群落差异呈显著相关。核心区的平均总有机碳（TOC）和平均化学需氧量（COD）水平分别比核心区外高8.73 %和17.51 %。相比之下，核心区外的磷酸盐、硫化物、铁和pH值高于核心区内。本研究通过调查鱼类otu的分布和丰度，揭示了淡水生态系统中生物群落的人为干扰。土著居民活动、生态旅游和人工鱼塘经营引发的水生环境变化和生物入侵可能是影响山间溪流鱼类多样性的主要危险因素。

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引用次数: 0