Open Access
Proceedings of the National Academy of Sciences
改写北美入侵刺水蚤的历史
Danai Kontou, Philippa L. Ascough, Elizabeth J. Favot et al.
Introduced species cause significant environmental impacts, making timely detection key for mitigation.带刺的水蚤，
长蝾螈
, is considered one of the most ecologically and economically destructive species in North American freshwaters.几十年来，管理层一直致力于限制其从劳伦斯五大湖的扩散，据信该病毒是在 20 世纪 80 年代进入圣劳伦斯航道的跨大西洋船舶通过压载水释放的。结合微化石分析
210
Pb-dated sediments, radiocarbon dating of chitinous remains, and sediment DNA, we show
拜托特菲斯
was present at low densities in inland lakes in Ontario, Canada, at least 100 years earlier than initially reported.然后，我们考虑其最近的扩散如何与广泛的环境变化以及影响其建立和人口增长的其他过程的变化同时发生。These results challenge widely accepted assumptions about the history of
拜托特菲斯
in North America and highlight the importance of temporal perspectives for managing species introductions and their impacts.
Open Access
Nature Communications
[Translation unavailable] Alteromonas macleodii breaches the diatom frustule triggering protoplast emergence and programmed necrosis-like death in Thalassiosira rotula
Isobel Short, Clara Martínez-Pérez, Samuel Miravet-Verde et al.
摘要
硅藻-细菌相互作用驱动海洋食物网基础的生物地球化学通量。尽管细菌越来越被认为是藻类死亡的重要驱动因素，但杀藻策略的多样性仍未得到充分研究。在这里我们表明
麦克氏交替单胞菌
, 常任会员
圆状海链藻
的微生物组，突破了硅藻的硅壳，诱导超过 95% 的细胞在 72 小时内从壳中出现，使原生质体暴露于裂解和利用之中。虽然原生质体的形成是由多种细菌诱导的，
麦克罗迪阿.
造成种群范围崩溃的独特现象，此处用于描述这种硅藻应激反应。双转录组学表明硅藻中存在程序性坏死样细胞死亡途径
圆环草
的最终形态变化，以及细菌运动性、趋化性和机会性代谢的上调。这些发现揭示了一种有效的杀藻策略，重铸
麦克罗迪阿.
作为一种利用硅藻死亡率谋取自身利益的拮抗剂，消除了硅藻壳提供的压舱物，从而重塑了海洋碳循环。
个体发育过程中人格的长期动态：生物学和心理学研究的异同
C Wrzus, C Cenni, WE Frankenhuis, S Kaiser, N Kuper…
[Translation unavailable] Over the past decades, personality has been studied in an increasingly diverserange of animals, spanning taxa from insects and fish to birds and mammals.Recently, the ontogeny of personality has been of interest across both the biologicaland social sciences, yet little integration, let alone synergy, has occurred betweenthese fields. The current article builds bridges across these largely disconnectedresearch fields, focusing on three processes that occur in both human and non … •Cites: Predator group composition indirectly influences food web …
Open Access
Diversity and Distributions
淡水蟹的全球模式、驱动因素和保护差距：从物种丰富度到系统发育多样性
Wanna Wu, Bing Wang, Zhaomin Zhu et al.
[Translation unavailable] ABSTRACT
Aim
Freshwater crabs are ecologically vital benthic macroinvertebrates that sustain freshwater ecosystem functions, yet their limited dispersal and fragmented habitats make them vulnerable to human disturbance. Current conservation assessments for freshwater crabs remain incomplete, as most studies focus on species richness while neglecting phylogenetic diversity and conservation gaps. This study aimed to characterize the spatial patterns of freshwater crab species richness (SR) and phylogenetic diversity (PD), identify their key driving factors, and evaluate existing conservation coverage to identify priority areas for targeted freshwater biodiversity protection.
Location
Global.
Methods
We integrated global occurrence data, phylogenetic sequences, and multi‐dimensional environmental and anthropogenic datasets. The distribution data covered 95.83% of genera and 82.86% of species. Using an ensemble species distribution model, we predicted potential species distributions and mapped global patterns of SR and PD. Spatial generalized linear mixed models were applied to quantify the driving factors. We further identified biodiversity hotspots, evaluated conservation gaps and pinpointed priority areas.
Results
Freshwater crab biodiversity exhibited a clear low‐latitude aggregation pattern, with major SR and PD hotspots concentrated in tropical and subtropical regions. Mountain topography and stable hydrothermal conditions promoted crab diversity, whereas strong precipitation seasonality inhibited species accumulation. Large conservation gaps were identified across core hotspot regions, and current protected areas poorly cover freshwater crab diversity. Moderate spatial optimization of protected areas could greatly enhance conservation coverage under global protection targets.
Main Conclusions
Global freshwater crab biodiversity patterns are shaped by coupled environmental and anthropogenic factors, with SR and PD showing heterogeneous spatial responses. Existing terrestrial‐oriented protected areas cannot effectively conserve freshwater crab biodiversity. Optimizing protected area spatial layout based on both SR and PD delivers more efficient conservation outcomes. This study demonstrates the importance of integrating evolutionary information into freshwater conservation planning and provides spatial priorities for filling global freshwater biodiversity conservation gaps.
Environmental Science and Pollution Research
对阿根廷最大沿海城市人工防波堤中与捕鱼相关的碎片进行评估
Maximiliano Manuel Hernandez, Juan Pablo Seco Pon
人工防波堤在全球范围内用于休闲钓鱼等活动，并有可能积累碎片，这些碎片随后可能被释放到海洋环境中，对海洋生态系统和人类健康构成潜在威胁。马德普拉塔是阿根廷最大的沿海城市，拥有该国最重要的商业港口，也是休闲渔业活动的主要目的地。45 个人工渔场中记录了与捕鱼相关的残骸…… •引用：娱乐活动的记录和潜在生物影响……此消息由 Google 学术搜索发送，因为您正在关注托马斯·梅纳 (Thomas Mehner) 撰写的文章的新引用。取消提醒
Open Access
无氧光养绿菌使用广泛的代谢和资源获取策略来支持稳定的近克隆繁殖
Molly A. Moynihan, Olivia L. Mathieson, Catherine A. Crowley et al.
摘要
缺氧光养绿硫细菌（GSB；Chlorobiia）是缺氧和含硫环境中重要的初级生产者，其在水生生态系统中的重要性将随着沿海脱氧而扩大。在这里，我们采用了独特的综合分析方法来研究 GSB 水华的形成、维持和崩溃。我们将多组学（V4V5 和合成长读长 16S rRNA 扩增子测序、宏基因组学和宏蛋白质组学）与总细胞和 GSB 特异性细胞计数、生物地球化学测量和同位素分析相结合。GSB绽放超过10
9
细胞毫升
-1
，是迄今为止报告的最高环境细胞密度之一，高达 96% 的水华由单一菌株水平组成
前绿藻
谱系（GSB-TRL01）。极端硫化物浓度(＞17mM)与细胞密度峰值和同位素组成的变化一致。水华持久性受到紧密耦合的硫循环、高固氮率、耐受氧化应激和维持氧化还原平衡的机制以及通过外膜运输系统获取营养的支持。硫氧化酶向具有更高硫化物亲和力的酶的转变导致了水华的消亡。
前绿藻
GSB-TRL01 与几个外膜转运系统中密切相关的谱系不同，包括转运磷酸盐的孔蛋白和 tonB 依赖性转运蛋白。总的来说，这些发现确定了可能实现近克隆的生理和代谢策略
前绿藻
人口获得非凡的生物量，同时耦合沿海环境中的硫、碳和氮循环。
北太平洋副热带环流贫营养区浮游植物大量繁殖的下降遗产
AE White, MJ Church, H Anderson, B Barone… - Limnology and …, 2026
海洋颗粒是一个异质的集合，包括活细胞和死细胞、粪便、富含粘液的聚集体以及矿物壳和硅藻壳。在光线充足的上层海洋中，光养过程促进了颗粒物的产生；然而，只有……
Open Access
Plants
土壤和水培介质中玉米和水稻对蓝藻提取物和赤霉素-a 的敏感性比较
Clare T. Muller, Scott A. Heckathorn, Jennifer K. Boldt
有害藻华产生的蓝藻毒素（蓝藻毒素）对真核细胞有毒。通过灌溉接触蓝藻毒素的植物会积累毒素并降低产量，因此了解蓝藻毒素对主要农作物的影响非常重要。尽管已经研究了一些蓝藻毒素对常见农作物生长和光合作用的影响，但尚未研究根部解剖结构的差异如何影响蓝藻毒素的吸收。因此，我们将玉米和水稻这两种缺乏和具有发育良好的根外皮的植物分别暴露于蓝藻提取物或纯赤霉素-a，以测试根结构如何影响蓝藻毒素敏感性。我们进行了三个比较实验：（1）一项盆栽研究，其中用蓝藻裂解细胞提取物浇灌玉米和水稻；（2）一项水培研究，其中用蓝藻提取物处理植物；（3）一项研究，其中植物在盆中生长并用纯鱼腥藻毒素-a浇水。我们假设水稻产生的组成性外皮会使水稻对蓝藻毒素的敏感性低于玉米。然而，在所有三个实验中，与未处理的对照相比，当根部暴露于提取物或赤霉素-a时，玉米和水稻的光合作用、叶绿素和生长均有所减少，尽管玉米植物比水稻受到的影响更快和/或更显着。我们的结果表明，水稻的根部外皮不能阻止根部吸收蓝藻毒素，也不能阻止蓝藻毒素的影响。
Open Access
Genes
丝状缺氧光养细菌橙绿弯菌类胡萝卜素生物合成基因及途径的功能分析
Jiro Harada, Ken Yamamoto, Shinichi Takaichi
背景/目标：类胡萝卜素在光合生物的光捕获、光保护和氧化应激防御中发挥着重要作用。丝状不产氧光养生物橙色绿屈菌（Chloroflexus aurantiacus）合成多种类胡萝卜素；然而，这些色素的生物合成基础和调控尚不清楚。方法：Cfx 的类胡萝卜素组合物。通过 HPLC 分析在不同条件下生长的 aurantiacus。此外，来自 Cfx 的候选类胡萝卜素生物合成基因。在大肠杆菌中异源表达 aurantiacus 以分析其功能。结果：我们检查了在厌氧光、有氧黑暗和有氧光条件下生长的细胞中的类胡萝卜素组成，发现主要类胡萝卜素种类随着氧气可用性而发生显着变化。在无氧光合作用条件下，γ-胡萝卜素、β-胡萝卜素和羟基化γ-胡萝卜素衍生物占主导地位，而有氧生长则诱导酮类胡萝卜素的积累，包括角黄素和海胆酮相关化合物。基因组挖掘揭示了候选类胡萝卜素生物合成基因，包括三个 crtI 旁系同源物和编码参与环化、羟基化、糖基化、酯化和酮化的酶的基因。大肠杆菌中的异源表达表明，CrtI1 作为八氢番茄红素去饱和酶，CrtY 通过 γ-胡萝卜素催化番茄红素环化为 β-胡萝卜素，CruF 作为 1,2-水合酶，CruC 作为类胡萝卜素葡萄糖基转移酶，CruD 作为参与酯化的酰基转移酶，CrtO 作为 β-胡萝卜素酮酶。结论：这些结果建立了 Cfx 中的类胡萝卜素生物合成途径。aurantiacus 并表明氧依赖性转录调节，特别是 CrtO，有助于在有氧条件下选择性生产酮类胡萝卜素。我们的研究结果为丝状无氧光养生物中的类胡萝卜素代谢以及在对比环境条件下支持生长的适应性生理策略提供了新的见解。
Open Access
Journal of Glaciology
追踪青藏高原冰川-湖泊-溪流连续体溶解有机物的生物地球化学转化
Lin Feng, Yanmei Liu, Yongqiang Zhou et al.
摘要
由于全球变暖，山区冰川正在加速融化，从而显着改变了冰前和下游的水文。然而，溶解有机物（DOM）沿冰川-湖泊-溪流连续体的生物地球化学转化仍不清楚。We investigated DOM dynamics within a typical continuum on the Dagu Glacier (eastern Tibetan Plateau) by analyzing samples from supraglacial snow, surface ice, a proglacial lake and a downstream glacier-fed stream during the mid (July) and late (October) melting seasons of 2021, coupled with in situ incubation experiments at the glacier terminus.Optical spectroscopy revealed that protein-like components dominated the supraglacial snow, ice and proglacial lake samples (72.2–95.3%), whereas stream samples exhibited higher proportions of humic-like components (23.1–44.1%), indicating an increasing terrestrial influence downstream.Ultrahigh-resolution mass spectrometry (Fourier transform ion cyclotron resonance mass spectrometry [FT-ICR MS]) analysis further revealed a 12.8–35.8% decrease in aliphatic and peptide-like compounds, alongside a 12.7–36.2% increase in lignin, polyphenolic compounds and polycyclic aromatic compounds along the continuum.The bio-incubation experiment, conducted under ambient field conditions with acknowledged methodological constraints (e.g. non-sterile filtration, fluctuating temperatures), provided evidence consistent with microbial degradation being a key driver of DOM transformation, showing a 26.3% net loss of aliphatic and peptide-like compounds over 30 days.这些发现增进了我们对冰川 DOM 生物地球化学及其季节演变的理解。
Journal of Applied Ecology
自上而下和自下而上的过程如何影响河流相连湖泊的食物网稳定性
Fanxuan Zhao, Daikui Li, Lingyu Hou et al.
摘要
人口稠密地区的湖泊面临来自流域（例如养分输入）和内部活动（例如捕鱼）的压力，这会改变营养状态和生物群落，最终威胁食物网的稳定性。虽然自下而上（资源驱动）和自上而下（捕鱼驱动）过程共同调节食物网结构和功能，但很少在多途径食物网的十年尺度上评估它们的相互作用效应。
本研究构建了一个与蒙特卡洛马尔可夫链方法相结合的线性逆模型，利用代表性河流连通湖泊（洞庭湖）33年（1990-2022）的量化能量通量重建了全面的多营养食物网。基于生态网络分析和雅可比矩阵，我们量化了营养相互作用、能量流和食物网稳定性对自下而上和自上而下控制影响的响应模式，以机械地量化耦合的食物网路径如何响应长期的宏观管理和环境演化。
结果表明，上层和海底能量途径之间的不平衡主要导致生态系统效率和稳定性的下降。养分富集导致生态系统组织较差，对碎屑碳源的依赖相对较低，物质循环能力下降（平均路径长度减少 8.2%）。这反映了系统性的高压力，最终破坏了食物网的稳定。这种由资源干扰引起的稳定性下降很难通过自上而下的控制来缓解，尽管它们在塑造营养结构中发挥着主导作用。有趣的是，适度捕捞促进了食物网的形成，其中捕食者更加专业化，系统效率更高。虽然禁渔令恢复了生态系统活动，但藻类过剩增加了最重的环重量，进一步破坏了食物网的稳定。
合成与应用
。我们对湖泊食物网的时间分析提供了一个警示性的见解。即使在中营养湖泊中，也应优先考虑养分负荷的控制，以维持食物网的稳定性。实施适度捕捞来调节顶级捕食者数量，有利于提高食物网内的能源效率和物质循环能力，维持生态系统的稳定。这项研究建议，对与河流相连的湖泊的管理应将营养物控制与适度、规范的捕捞活动相结合，作为维持长期食物网复原力的补充策略。
Water Research
CO2 和 CH4 的共沸：揭示世界第三极隐藏的碳排放途径
Jiarui Li, Haizhen Wang, Bin Li et al.
沸腾是水生系统中甲烷 (CH₄) 排放的一种成熟途径。在这里，我们报告了一个以前被忽视但后果严重的现象，即“共沸腾”，即气泡内二氧化碳 (CO2) 和 CH4 的共同释放。基于对青藏高原（QTP）主要河流（雅鲁藏布江、澜沧江、长江、黄河）溶解温室气体浓度和排放量的全面调查，我们证明…… •引用：沉积物特性驱动潜在甲烷的空间变异……
Open Access
Environmental Research Letters
废水处理引起的碳酸盐化学变化及其对海洋碱度增强的影响
Kuan-Ting Li, Hsin-Yi Wang, Hsiao-Chun Tseng et al.
摘要
城市污水处理厂（WWTP）是城市碳循环的重要组成部分，并被提议作为海洋碱度增强（OAE）的潜在平台。然而，碳酸盐系统在全面处理过程中的转变仍然受到很少的限制。在这里，我们展示了总碱度 (TA)、溶解无机碳 (DIC)、pH、
p
一氧化碳
2
, 溶解CH
4
，和溶解的N
2
O 跨越台湾全规模沿海污水处理厂的五个连续处理单元。从进水通道到氯化装置，TA和DIC分别下降94.5%和84.0%，并伴有酸化和持久CO
2
过饱和。这些模式与曝气和其他内部处理过程相关的硝化和 DIC 转化过程中的碱度消耗一致。溶解CH
4
曝气后显着下降，而 N
2
O 在曝气池中达到最大浓度，并在最终废水中保持较高浓度。一氧化碳
2
使用传统的基于风的和有限获取参数化获得的交换估计与连续处理阶段之间的表观 DIC 平衡有很大不同。这种差异凸显了与估算 CO 相关的强烈方法论不确定性
2
在密闭和机械曝气处理装置中进行交换。因此，结果主要根据观察到的浓度变化和碳酸盐系统转变来解释，而不是作为明确的排放估计。处理阶段之间显着的化学差异为评估碱度添加在何处以及如何与废水处理过程相互作用提供了经验约束。需要重复观察、直接气体通量测量和碱度质量平衡来确定基于废水的 OAE 的净碳去除潜力。
Open Access
Acta Limnologica Brasiliensia
从休眠到孵化：新热带浅湖微甲壳动物卵库对不同沉积物干燥持续时间的响应
Bárbara Oleinski, Karoline Pereira Martins, Thais Carneiro et al.
摘要 旨在表征不同干燥持续时间下两个新热带浅水湖泊卵库中微甲壳动物的时间孵化模式和分类组成。2020 年 3 月和 2022 年 5 月从两个湖泊（LAK1 和 LAK2，里奥格兰德，RS，巴西）收集表层沉积物。样品经过两次干燥处理：延长（2 年、3 个月、25 天）和短期（55 天）。对于孵化实验，沉积物通过湖泊和处理进行均质化，每个湖泊×处理组合获得五个 100 g 子样本。实验单位用蒸馏水水合，并在 24°C、12 小时光照/12 小时黑暗光周期下保存 46 天。每两天监测一次孵化事件，并以尽可能低的分类水平鉴定生物体。已鉴定出来自 9 个科的 26 个类群，只有 3 个类群出现在所有处理中，而其他类群则是湖泊或处理特定的。枝角类在早期和中期占主导地位，而介形类在最后几周占主导地位。在整个实验过程中，所有处理的累积丰富度都有所上升。不同湖泊微甲壳动物的分类组成和孵化动态存在差异，而干燥时间及其与湖泊的相互作用没有显着影响。湖泊的干燥对卵库的影响不同，表明当地环境的影响。包括延长的干燥间隔可能会增进对新热带湖泊孵化动态的了解，特别是考虑到全球气候变化下极端干旱频率的增加。
Open Access
Knowledge & Management of Aquatic Ecosystems
最强的海岸线简化与水文相连的城市湖泊中鱼类和水鸟的跨营养一致性相一致
Yuliia Kovalenko, Inna Nezbrytska, Mykola Prychepa
海岸线改造在城市湖泊中很普遍，但其对跨营养关系的影响仍然知之甚少，特别是在水文相连的系统中。这项观测研究比较了三个水文相连的城市湖泊，其海岸线变换不同，沿梯度的每个位置都由一个湖泊代表。在 2018-2020 年和 2022-2024 年期间对鱼类和水鸟组合进行了调查，涵盖转变的早期和后期阶段（2019-2020 年的工程和水生植物去除）。土生植物减少和海岸线工程表征了沿海转变/简化的相对程度。使用互补方法分析了鱼类多样性、水鸟组合结构和跨营养一致性。鱼类多样性和水鸟组合表现出截然不同的时间轨迹，而跨营养一致性从变化最小的湖泊到变化最大的湖泊逐渐增强。PERMANOVA 和 PERMDISP 支持水鸟组合结构和变异性的差异，而 Mantel 分析表明鱼类和水鸟组合在梯度上具有更强的时间对应性。由于每个转化水平都由一个湖代表，因此这些结果描述的是关联性而不是因果效应。研究结果表明，尽管组合动态存在对比，但沿海生境的简化可能伴随着更强的跨营养一致性。
Open Access
Ecological Research
Epipelon 对富营养化湖泊磷限制响应的实验评估
Renata Aparecida Costa, Darah Danielle Pontes, Carla Ferragut
[Translation unavailable] ABSTRACT
In a mesocosm experiment conducted in an urban lake, we evaluated the responses of algal and cyanobacterial communities in the epipelon to increased P limitation in the water column under eutrophic conditions. Water and sediment samples were collected on days 3, 10, 17, 27, and 60 of the experimental period. Environmental conditions in the treatment with N addition were characterized by an increased N:P ratio and N availability, accompanied by a transient decrease in phytoplankton biomass during the initial phase. Algae and cyanobacteria in the epipelon responded to increased P limitation caused by nitrogen enrichment, increasing the total biovolume. Changes in composition and descriptor species were associated with the P‐limiting condition, which favored species with luxury P uptake. Our results suggest that the positive response of the epipelon was driven by changes in limitation potential, nutrient concentration, and local environmental conditions, rather than phytoplankton dynamics alone. Species with luxury P uptake, including cyanobacteria, were favored under an increased N:P ratio. This study advances our understanding of epipelic community structure in eutrophic systems and highlights the importance of benthic–pelagic interactions under nutrient imbalance scenarios, showing that epipelic communities can respond directly to environmental changes in the water column.
[Translation unavailable] A Chromaticity Baseline Height Index and Sliding Window Iterative Thresholding for Automatic Harmful Algal Bloom Extraction
Jiaguo Li
[Translation unavailable] Frequent Harmful algal blooms (HABs) have become an important ecological issueaffecting lakes worldwide. Existing HABs indices are easily affected by complexwater backgrounds, while global threshold segmentation methods cannot effectivelyadapt to the spatial heterogeneity of HABs, resulting in false detection over turbidwaters and omission of HABs. To address these issues, this study developed aChromaticity Baseline Height Index (CBHI) based on the spectral structural … •Cites: Ground-based remote sensing provides alternative to satellites for …
Open Access
[Translation unavailable] The Cyanobacterial dnaX Intein Encodes an Out-of-Frame Homing Endonuclease and is Sporadically Distributed in the Phylum
Daniel Phillips, Stella DeSimone, Johann Peter Gogarten
[Translation unavailable] Abstract
Inteins are self-splicing proteins with a wide distribution in single-celled organisms, viruses, and plastids. The function of inteins remains an unanswered question. They may be regulatory elements as they must splice out of their host protein. However, recent research findings point to inteins likely being mobile selfish genetic elements capable of horizontal transfer. Here the intein inhabiting cyanobacterial DNA Polymerase III gamma/tau subunit (
dnaX
) serves as a case study into the conservation and phylogenetics of the intein compared to the host extein. Phylogenetic analysis reveals a sporadic distribution of intein alleles having an evolutionary history that is incongruent with the extein that may reticulate independently across clades. The
dnaX
intein can also contain an out-of-frame homing endonuclease (HE), a rarity for annotated inteins, that may have been the result of secondary invasion of an HE into a mini-intein. The simultaneous presence of intein-free and intein-containing alleles in populations of
Microcystis
aeruginosa challenges current theories about the life cycles of homing endonuclease containing selfish genetic elements and suggests that alternatives to the homing cycle need to be considered for intein persistence. Our analysis reveals an incongruent, disjointed distribution of this specific intein, suggesting that it is neither conserved among individual cyanobacterial lineages nor a critical component of
dnaX
functionality yet is able to persist in populations without being lost.
大陆水生生态系统生物多样性与地表水生生态系统和蓝藻细菌增殖之间的双向关系……
JF Humbert, C Quiblier - Environnement, Risques & Santé, 2026
[Translation unavailable] [12] Quiblier C, Wood S, Echenique-Subiabre I, Heath M, Villeneuve A, Humbert JF.A review of current knowledge on toxic benthic freshwater cyanobacteria-ecology,toxin production and risk management. Water Res. 2013; 47: 5464-79.[13] Wood SA,Kelly L, Bouma-Gregson K. Toxic benthic freshwater cyanobacterial proliferations:Challenges and solutions for enhancing knowledge and improving monitoring andmitigation. Freshw Biol. 2020; 65: 1824-42. •Cites: Widespread deoxygenation of temperate lakes This message was sent by Google Scholar because you're following new citations to articles written byK David Hambright. Cancel alert
Open Access
Methods and Applications in Fluorescence
单分散发光纳米传感器的闪光纳米沉淀，用于同时进行氧气和流量成像
Micael Wind-Hansen, Mathilde Godefroid, Andrey Kalinichev et al.
[Translation unavailable] Abstract
Understanding mass transfer in aquatic biological systems requires simultaneous measurements of velocity fields and transported scalar fields. Such scalar fields, including spatial distributions of dissolved oxygen concentration, can be measured using luminescent sensor particles that also function as flow tracers, but their performance is affected by particle size and dispersity. Therefore, reproducible preparation of monodisperse sensor particles is essential for reliable sensing and velocimetry. Here, we systematically optimized flash nanoprecipitation to prepare oxygen-sensitive nanosensors based on poly(styrene-co-maleic anhydride) (PSMA). Dynamic light scattering identified polymer concentration as the primary determinant of particle size, with additional tunability provided by nonionic surfactants. Below the critical overlap concentration, increasing Reynolds number generally reduced particle size with lower dispersity. By varying these preparation conditions, monodisperse nanosensors with tunable hydrodynamic diameters of approximately 120–410 nm (polydispersity index, PDI < 0.1) were reproducibly obtained. In contrast, polymer concentrations above the critical overlap concentration produced polydisperse particles with mean hydrodynamic diameters exceeding 800 nm. Frame-straddling lifetime imaging showed an approximately linear Stern–Volmer response from anoxia to air saturation, with nonlinear behavior occurring only under supersaturated conditions. The nanosensors were successfully applied within the sensPIV framework, enabling simultaneous mapping of oxygen distributions and velocity fields around a living coral. Estimated hydrodynamic relaxation times indicated negligible inertial lag across the investigated particle-size range, whereas estimated oxygen equilibration times of approximately 0.04–4 ms suggested that finite sensor response may limit the resolution of the smallest scalar structures. These results establish flash nanoprecipitation as a reproducible and highly controllable route for preparing monodisperse polymeric nanosensors with tunable particle sizes for simultaneous scalar and velocity measurements.
大肠杆菌生物膜中的电现象：信号传导和刺激
VC da Cunha Martorelli - 2026
细菌的大部分生命往往生活在生物膜中，因为生物膜提供了保护环境，从而有利于它们的存活率。最近的研究结果表明，细菌利用生物膜中的离子通道，通过离子的电脉冲进行交流。•引用：细菌 eDNA 在生物膜形成中的结构作用……
Regional Studies in Marine Science
[Translation unavailable] Temporal trophic roles of large pelagic off Cabo San Lucas, southern Baja California Peninsula, Mexico (2018-2024): a network analysis approach
Amairani Hernández-Aparicio, Sofía Ortega-García, Rodrigo Moncayo-Estrada et al.
[Translation unavailable] Network analysis of marine food webs enables us to assess how the communitystructure and function respond to environmental variability, by integrating theinteractions that regulate energy flow through trophic interactions. In the oceans …
Open Access
Freshwater Biology
湖泊中顶级捕食者基于个体的能量耦合
Victor Frossard, Miranda Bell‐Tilcock, Thibaud Noguès et al.
[Translation unavailable] ABSTRACT
Top predators are thought to couple distinct energetic pathways in aquatic ecosystems. Although clear evidence in energetic coupling exists at the population or species levels, intraspecific diversity in foraging decisions can create scope for conspecific individuals differing in their roles in energetic coupling. In particular, ontogenetic trophic niche shifts and interindividual niche variation can drive heterogeneity in resource reliance both within and among individuals that may be accounted for to predict how top predator individuals collectively couple energetic pathways among different habitats.
We measured the stable isotope composition of eye lenses (17 ± 3 isotope measures per individual) for a set of 17 large‐sized pike (
Esox lucius
, body size = 102 ± 6 cm) to quantify their lifetime energetic coupling between the two distinct habitats (littoral and pelagic habitats) in the largest French lake (Lake Bourget). The combination of both trajectory and movement‐related analyses enabled us to characterize individual‐level lifelong niche trajectories and to quantify ontogenetic variation in their resource reliance related to specific habitats.
Pike exhibited a remarkable diversity of lifelong isotope trajectories dominated by right‐upward variations in the isotope space that decreased with body size based on angle and segment length analyses. Two distinct trajectory types emerged, ranging from quasi‐linear to zig‐zag‐like isotope patterns. The median lifetime littoral reliance of individual pikes was 52.5%, supporting the hypothesis of energetic coupling among lake habitats. Yet, major ontogenetic littoral‐to‐pelagic diet shifts were identified for all pikes, differing in their extent and timing among individuals, leading to unimodal or bimodal individual lifetime habitat‐related resource reliance.
Our results suggest that pike couple lake energetic pathways primarily via ontogenetic niche shift following a continuum of littoral to pelagic reliance while including among‐individual distinct trophic strategies. Consequently, both inter and intra‐individual trophic variations should be considered when quantifying energetic coupling at a population scale.
Open Access
Ecology and Evolution
气候、土地利用和养分富集对南非河流大型无脊椎动物动态的个体和交互影响
Buntu Fanteso, Tatenda Dalu, Ryan Wasserman et al.
摘要
由于气候变化和当地人为压力造成的多重压力，淡水生态系统日益退化。然而，压力源潜在的重要交互影响尚不清楚。尽管实验研究有越来越多的证据表明存在多种压力源效应，但仍需要更多的实地研究，以在生物变异性和环境依赖性较高的情况下提供补充见解。我们对南非 30 条溪流的底栖大型无脊椎动物群落进行了广泛的调查，以研究对气候、人类土地覆盖和养分富集的单一影响和相互作用影响的反应。我们在冷干季和湿热季对每个地点的大型无脊椎动物和理化变量进行了采样。使用 2022 年南非国家土地覆盖 (SANCL) 数据对土地利用进行分类。我们使用南非气象局 (SAWS) 的温度和降雨量数据作为气候代理。铵是最普遍的压力源，它既独立地发挥作用，又与气候和人类土地覆盖相互作用，影响大型无脊椎动物群落动态，包括对蜉翅目、蜈蚣目和毛翅目 (EPT) 丰富度和平均生物量 (mg) 的独立影响，以及与人类土地覆盖的相互作用，对总体和 EPT 丰度产生负面影响。人类土地覆盖和降雨的相互作用，以及铵、降雨和季节的相互作用对平均体型产生积极影响，表明降雨是调节这种影响的重要压力源。总体而言，我们的研究表明，气候和人为压力因素的个体影响和相互作用影响都会影响淡水大型无脊椎动物群落的动态。我们的研究强调，减少养分投入和有效的土地利用管理将对保护淡水无脊椎动物大有帮助。
Open Access
Ecological Indicators
2000—2023年中国长江中游典型湖泊溶解性有机碳浓度遥感反演及驱动因素
Xin Mou, Xiaowen Lin, Xiaodong Wu et al.
[Translation unavailable] Dissolved organic carbon (DOC) is the largest organic carbon (C) pool in aquaticsystems and closely related to lake C emissions. However, long-term monitoring ofDOC dynamics and their driving factors remains limited. This study analyzed DOC …
Hydrobiologia
埃及尼罗河淡水贻贝 Coelatura aegyptiaca（双壳纲：Unionidae）的摄食行为和微囊藻毒素的生物累积
Olfat Abdelsaleheen, Asmaa Bakr
淡水贻贝是重要的滤食动物，可以影响水生生态系统中的浮游植物群落和毒素动态。因此，我们研究了埃及 Coelatura aegyptiaca 在接触有毒蓝藻时的摄食行为……此消息由 Google 学术搜索发送，因为您正在关注与 David Hamilton 研究相关的新文章。取消提醒
Open Access
柠檬酸盐功能化纳米羟基磷灰石作为土壤流动性和植物有效磷肥
Pauline Møs, Grmay Hailu Lilay, Max Frank et al.
[Translation unavailable] Abstract
Background and Aims
Phosphorus (P) availability in soils is often limited by sorption processes that reduce the efficiency of conventional inorganic P fertilizers. This study aimed to evaluate whether citrate-functionalized nano-hydroxyapatite (nHAp) can reduce soil retention and enhance plant P uptake compared to a water-soluble P fertilizer.
Methods
The mobility of citrate-functionalized and unmodified nHAp was compared with potassium phosphate (Pi) in soil column experiments using agricultural soils with contrasting P status. Plant uptake was assessed in a rhizobox experiment with spring barley (
Hordeum vulgare
) using
33
P-labelled fertilizers and autoradiography. Additionally, changes in P speciation were evaluated through sequential chemical extractions during a seven-week soil incubation.
Results
Citrate-functionalized nHAp exhibited greater mobility than Pi across soils, whereas unmodified nHAp was largely immobile. In the rhizobox experiment,
33
P supplied by both fertilizers was translocated to barley shoots and detected across the entire root system using autoradiography. However, plants supplied with nHAp showed significantly higher uptake of fertilizer-derived
33
P and greater total P accumulation than those receiving Pi. Sequential extractions revealed largely unchanged labile P fractions for both fertilizers, indicating limited dissolution of nHAp and highlighting constraints of conventional fractionation methods.
Conclusion
Citrate functionalization reduced soil retention and enhanced plant uptake of nHAp-derived P compared to the water-soluble Pi control. These findings demonstrate the potential of surface-modified nano-fertilizers to improve P use efficiency, while emphasizing the need for development of methods that can capture nanoparticle-specific processes in soil-plant systems.
Open Access
Geoscience Data Journal
西伯利亚矮松生态系统中观测到的能量、水蒸气和二氧化碳通量的 7 年涡度协方差数据集
Hiroki Iwata, Ryo Sato, Naoki Makita et al.
[Translation unavailable] ABSTRACT
Alpine ecosystems provide a variety of valuable services, such as freshwater provision, timber supply, and climate regulation. Quantifying atmosphere–ecosystem exchanges of water and carbon is essential to understanding the mechanisms underlying these services and predicting how climate change may alter them. To clarify the role of alpine ecosystems in water and carbon cycling, we measured fluxes of energy, water vapour, and carbon dioxide, alongside micrometeorological data, in a Siberian dwarf pine (
Pinus pumila
) ecosystem in the Japanese Alps from 2018 to 2024. The fluxes were observed using the eddy covariance technique. The quality of the flux data was assessed using micrometeorological criteria, and data gaps were filled using a random forest regression approach. Despite being conducted on a non‐ideal steep slope, the measurements adhered to surface‐layer similarity scaling relationships, and the surface energy balance showed no significant deviation from observations over flat terrain, confirming high data quality. This 7 year dataset constitutes an important addition to the available databases on alpine ecosystems and will facilitate a better understanding of the roles of alpine ecosystems in water and carbon exchanges under climate change. It will also provide a valuable resource for parameterising and validating terrestrial ecosystem models and remote‐sensing products for alpine regions in East Asia.
Open Access
Ecosystems
[Translation unavailable] Organic Matter Redox Status Predicts Methane Production in Boreal Peatland Ecosystems
Jessica E. Rush, Jennifer C. Bowen, Jason K. Keller et al.
[Translation unavailable] Abstract
Boreal peatlands are important locations of carbon storage, but the mechanisms controlling methane (CH
4
) production in these ecosystems are not fully understood. Reduction of redox-active organic matter (RAOM) is one understudied mechanism where microbes use solid-phase (i.e., peat) organic matter as a terminal electron acceptor in anaerobic respiration. RAOM reduction suppresses methanogenesis due to energetic favorability and is often considered as an explanation for why certain peatland ecosystems produce less CH
4
than expected after accounting for other electron acceptors. Given the role of RAOM in regulating CH
4
production, we compiled datasets from boreal peatlands in the USA that quantified RAOM redox state using an electron shuttling capacity (ESC) assay and evaluated how RAOM reduction predicted CH
4
production in laboratory and in situ field incubations. Across all laboratory incubations, CH
4
production linearly increased as RAOM was reduced, explaining 20% of average CH
4
production over time. Predictive power was stronger in bogs than fens, although both produced negligible CH
4
(< 0.01 μmoles) until RAOM reduction reached a certain threshold (~ 20 μmoles e
−
/g dw peat). In field incubations, CH
4
production also linearly increased as RAOM became more reduced, explaining 60% of average CH
4
production. Overall, RAOM redox state was a good predictor of CH
4
production across boreal peatland ecosystems, consistent with the growing evidence suggesting that RAOM is the major terminal electron acceptor for anaerobic respiration in peatlands. Our work demonstrates that incorporating RAOM dynamics into peatland carbon cycling frameworks can help improve predictions of present and future CH
4
emissions.
Ecosystems
[Translation unavailable] Carbon Flux Dynamics in Rice–Wheat Systems Across Contrasting Climatic Regimes of Northern India Based on Eddy Covariance Measurements
N. R. Patel, Shweta Pokhariyal, R. S. Rana et al.
稻麦种植制度在南亚和东南亚广泛实行，是印度粮食安全的核心，在亚热带低地和温带山区气候下种植。净生态系统交换 (NEE)、生态系统……
Water Research
[Translation unavailable] Radiocarbon and molecular constraints on the sources and fates of dissolved organic matter in the Bohai Sea
Yeongjin Ryu, Zhenwei Yan, Yuanbi Yi et al.
[Translation unavailable] The ocean contains a reservoir of dissolved organic matter (DOM) comparable to theatmospheric carbon pool, yet molecular characterization remains challenging owingto its chemical complexity. We measured the radiocarbon content (Δ 14 C) of solid …
Journal of Environmental Management
[Translation unavailable] Effects of different biochar application rates on CH4 emissions and Microbial Carbon Pump (MCP) mediated carbon sequestration in paddy fields: a quantitative …
Yuefeng Li, Hongyu Chen, Jie Chen et al.
生物炭改良是一种行之有效的减少甲烷 (CH 4) 排放和增强稻田土壤碳固存的策略。然而，微生物碳泵 (MCP) 驱动的顽固有机物的深度依赖动力学……此消息由 Google 学术搜索发送，因为您正在关注与 Andreas Lorke 的研究相关的新文章。取消提醒
湖泊管理政策实施的社会生态成果：来自印度尼西亚坦佩湖的证据
M Rahman - International Journal of Special Education, 2026
[Translation unavailable] Lake management policy in developing countries increasingly couples largeengineering interventions with commitments to community welfare, yet the ecologicaland social results of such policies are rarely assessed within a single analyticalframe. This study examines the implementation of lake management policy at LakeTempe, Wajo Regency, Indonesia, through four social–ecological dimensions: socialecology, community economy, culture and local wisdom, and social institutions. A … •Cites: A global assessment of lake restoration in practice: New insights …
ACS ES&T Engineering
天然苦咸水的插层电池去离子：腐植酸结垢机制以及通过活性炭预处理的缓解措施
Yongchang Yu, Xun Guan, Xitong Liu
摘要
基于插层电极的电池电极去离子（BDI）代表了一种有前途的苦咸水淡化方法，但其在处理复杂环境水体时在有机污垢下的性能仍不清楚。在这项研究中，我们使用具有对称 BDI 架构的流动池评估了插层电极材料在从切萨皮克湾收集的苦咸水中的脱盐行为，重点关注有机污垢的影响以及通过粉末活性炭 (PAC) 预处理进行的缓解。六氰基铁酸镍（NiHCF）表现出优异的循环稳定性（50个循环内为40-45 mAh g-1）和更高的脱盐能力（∼90 mg g-1），而六氰基铁酸铜（CuHCF）则表现出较低的能耗（∼0.08 Wh g-1）。浸出分析证实了这些材料的差异稳定性：CuHCF 释放的溶解铜含量远高于从 NiHCF 中浸出的镍，这与其在循环过程中更容易发生结构降解相一致。9.3 mg TOC/L 腐殖酸 (HA) 的存在使海水淡化率降低了约 10%。用 PAC 预处理苦咸水可去除约 80% 的溶解有机物，使海水淡化率恢复约 10%，并将能耗降低约 50%。通过使用电化学阻抗谱、zeta 电位测量和 H 电池电阻测量进行表面表征，我们发现有机污染物显着增加了电极的电荷转移和传质电阻，并提高了阴离子交换膜的离子电阻。我们的结果揭示了有机污垢和预处理如何影响环境水中的插层电极性能，从而为提高实际应用中的海水淡化系统耐久性提供见解。
俄亥俄河和伊利诺伊河卫星衍生的叶绿素-a (CHOIR)
SJ Sillen, G Zuccolotto, B Steele, MRV Ross, EM Elliott… - Journal of Geophysical …, 2026
[Translation unavailable] Chlorophyll‐a is a vital water quality measurement used as a proxy for algal biomassin freshwater systems. However, limited field data in rivers, particularly within theOhio River Basin located in the central United States, has impeded ourunderstanding of how river algae change over time and where it most impacts waterquality. We built a 38‐year (1984–2022) data set of satellite‐derived chlorophyll‐athat enables, for the first time, quantification of long‐term trends and spatially explicit … •Cites: A systematic literature review of forecasting and predictive models …
Open Access
Journal of Geophysical Research: Biogeosciences
[Translation unavailable] Low denitrification, anammox, and dissimilatory nitrate reduction to ammonium rates in a low disturbance mangrove‐saltmarsh system using an in situ intact chamber …
Britte C. van Haastregt, Dirk V. Erler, Jacob Z.‐Q. Yeo et al.
[Translation unavailable] Abstract
Mangroves and saltmarshes can remove anthropogenic nitrogen (N) moving from the land to the ocean, but many previous N cycling measurements used destructive sampling procedures that excluded important habitats such as crab burrows, pneumatophores, and saltmarsh vegetation. In this study, a new intact chamber method using
15
NO
3
−
labeling was developed to quantify in situ denitrification, anammox, and DNRA rates in different habitats across a low disturbance mangrove‐saltmarsh system. No anammox was detected, likely due to the low nutrient concentrations. Denitrification rates were 0.4–36 times higher than DNRA rates. The highest denitrification rates were measured in crab burrows (36.4 μmol N m
−2
h
−1
) and saltmarsh (26.6 μmol N m
−2
h
−1
), while DNRA rates were highest in saltmarsh (7.4 μmol N m
−2
h
−1
) and pneumatophores (2.1 μmol N m
−2
h
−1
). Rates were scaled using a detailed habitat map, giving a total of 17.1 kg N ha
−1
yr
−1
being removed via denitrification in the mangrove system, 17.0 in the saltmarsh system, 17.5 in the open water system, and 17.1 in the mangrove‐saltmarsh‐open water system. Furthermore, 2.5 kg N ha
−1
yr
−1
was recycled by DNRA in the mangrove system, 2.9 in the saltmarsh system, 1.9 in the open water system, and 2.5 in the saltmarsh‐mangrove‐open water system. The low denitrification and DNRA rates compared to previous studies likely reflect minimal anthropogenic disturbance and associated low nitrogen availability at the study site, but this needs to be confirmed with replicated measurements using the new intact chamber method at a high nutrient concentration mangrove‐saltmarsh site.
Wetlands Ecology and Management
[Translation unavailable] An integrated Fuzzy–GIS–AHP framework for spatial modelling of anthropogenic threats to wetlands: application to the Dayet Ifrah Ramsar site, Morocco
Mohammed Chrif El Idrissi, Er-Riyahi Saber, Mohamed El Mazi et al.
湿地是脆弱的生态系统，提供基本的生态服务、调节水文过程和支持生物多样性，但它们越来越受到人为和气候压力的影响。在摩洛哥的中阿特拉斯地区，达耶伊夫拉湿地 (Dayet Ifrahwetland) 是 Lacs d'Imouzzer du Kandar Ramsar 湿地综合体的一部分，受到与农业扩张、地下水抽取、定居点邻近和土地利用变化相关的日益增长的压力的影响。这项研究……•引用：周围湖面水的快速且高度变化的变暖……
Inland Waters
水文气候变化影响富营养化末期湖泊特定栖息地（远洋和滨海底栖）的代谢
Facundo Scordo, James Simmons, Carina Seitz et al.
这项研究表明，水文气候变化会影响富营养化终端湖泊中特定栖息地（远洋和滨海底栖）的代谢。水文气候影响湖泊代谢（初级生产总值，GPP；生态系统呼吸，ER；以及净...
Open Access
Journal of Environmental Management
[Translation unavailable] Divergent dissolved organic matter molecular signatures and microbial functional patterns associated with cyanobacterial and dinoflagellate bloom periods in a …
Zhongqing Huang, Chunmei Tian, Chen Wang et al.
高原湖泊对藻华高度敏感，藻华日益威胁其生态完整性。这项研究检查了湖中的蓝藻藻华期（Pseudanabaena sp.）和甲藻藻华期（Peridinium sp.）......
Open Access
Journal of Environmental Management
季节性孤立湖泊的年度重建揭示了鄱阳湖漫滩的历史收缩和恢复基线
Chun Yang, Zhiqiang Tan, Yongjiu Cai et al.
[Translation unavailable] Seasonal isolated lakes (SILs) are shallow water bodies defined by their temporaryhydrological disconnection from the main lake and river network, yet their long-termabundance, turnover, and spatial legacy remain poorly resolved. Using a fused daily …
Open Access
Hydrology
中国环渤海沿岸河流溶解有机物时空格局及环境控制
Zhen Ren, Jiao Yang, Wanzhu Li et al.
沿海河流中的溶解有机物（DOM）在陆地-海洋碳循环中发挥着关键作用，但其时空动态驱动因素仍然知之甚少。本研究利用紫外-可见光吸收、荧光光谱和稳定碳同位素分析研究了中国环渤海地区的五条典型河流。荧光指数和双代理源表征表明，主要来自浮游植物和微生物代谢的本土 DOM 在大量 DOM 池中占主导地位，而陆地 C3 植物输入则为次要但空间可变的来源。在所有测量的环境变量中，水温与DOM光学特性表现出较强的相关性，而盐度的影响有限。Mantel测试和偏最小二乘路径模型进一步表明，水温通过调节浮游植物生物量和多样性间接影响DOM的时间变化，进而促进低芳香度本土DOM的产生。该级联框架综合了对河流 DOM 的热、营养和微生物控制，提高了对区域碳预算的理解，并为渤海沿岸地区的综合管理提供了科学支持。
Open Access
Sustainable Environment
农业排水泥炭地再润湿后的水质动态：中生态实验
Teresa Silverthorn, Kate Blake, Elya Monsen-Elvik et al.
泥炭地再湿润是减少碳损失、阻止土壤沉降和恢复生态系统功能的有效恢复策略。然而，重新润湿排水和退化的泥炭地可能会将储存的营养物质和潜在的有毒元素释放到……
Open Access
Ecological Indicators
有机物通过支持混合营养生长促进淡水甲藻的繁殖
Tianhao Wu, Yue Wu, Fen Zhang et al.
营养状态指标广泛用于评估浮游植物水华风险，但它们捕捉淡水甲藻水华的能力仍不确定。洱海的长期监测表明，自2003年以来，营养状况变化不大……
CATENA
植被和环境因素对滨海湿地溶解有机物特性的耦合影响
Zihan Zheng, Yingying Jiang, Tingcang Hu et al.
沿海湿地是重要的蓝色碳汇，但植被分区和相关环境梯度调节溶解有机物（DOM）动态的机制仍知之甚少。在这里，我们调查了……此邮件是由 Google 学术搜索发送的，因为您正在关注与 Erik Jeppesen 的研究相关的新文章。取消提醒
Open Access
ICES Journal of Marine Science
使用水平束声学估算维多利亚湖浅缘鱼类生物量
Yang Yang, Roland Proud, Robert Kayanda et al.
[Translation unavailable] Abstract
The shallow margins (&lt;10 m depth) of Lake Victoria, comprising ca. 9% of the lake’s total area, have been suggested to harbour up to 35% of the lake’s fish biomass based on limited trawl data. However, since standardized lake-wide acoustic surveys began in 1999, these nearshore waters have remained inadequately sampled due to the inability of research vessels to operate in shallow waters, creating one of the largest data gaps in the assessment of Africa’s most productive inland fishery. This study addresses this longstanding sampling gap by conducting near-horizontal acoustic surveys at 17 sites along the Tanzanian shoreline. A total of 65 surveys over 6 rounds were conducted between November 2019 and March 2023, using an open canoe equipped with a broadband echosounder (Simrad EK80, centre frequency 200 kHz). Concurrent beach seine and gillnet sampling provided species composition and size information, and biomass was estimated using echo counting and geostatistical methods. Shallow margins cover ca. 10.2% (3528 km²) of the Tanzanian sector within the 10 m isobath and 19.5% (6736 km²) within the 20 m isobath. Estimated total biomass ranged from 0.26 to 0.68 million tonnes (MTs) in the 20 m strip and from 0.15 to 0.37 MTs in the 10 m strip. Tilapia and haplochromines dominated the biomass in most surveys, while Nile perch contributed a smaller but persistent fraction. These findings identify the shallow margins as a quantitatively important biomass domain in the Tanzanian sector and highlight the need for dedicated shallow water sampling in future fisheries assessment and ecosystem modelling.
Open Access
Veterinary Sciences
赤潮藻毒素引起的海水鱼类肠道损伤：机制、肠道微生态和水产养殖健康风险评估
Lingxiao Hang, Haihua Xu, Yanzhe Ding et al.
有害藻华 (HAB) 可能会导致暴露的海洋鱼类迅速、大量死亡，通常在鱼级诊断采样可以指导应急响应之前发生。本综述比较了由麻痹性贝类毒素、冈田酸和甲藻毒素、短尾藻毒素和致死鱼类引起的肠道损伤的毒素特异性证据，同时区分了海洋鱼类中的直接证据和其他模型中的证据。肠道屏障破坏、炎症和微生物组变化对于解释亚致死暴露、幸存者恢复和事件后归因很有价值。不建议将它们作为急性鱼类死亡期间的操作触发因素。相反，实际管理主要取决于暴露前的特定地点环境监测、水华临近时预先确定的应急行动，以及长期减少可避免的养分和废物输入，这些因素会导致当地水华风险。四阶段框架将环境危害、鱼类暴露、生物效应以及生产或食品安全结果与每次转变的定量指标和明确的不确定性联系起来。此修订范围将机械肠道毒理学置于海水养殖的生态时间尺度和操作限制内。
Journal of Ocean University of China
用微胶囊饲料部分替代活微藻可改善生长、营养成分和增肥的风味相关化合物……
Yang Zhang, Hailong Huang, Yang Liu et al.
牡蛎育肥依赖于微藻。但微藻的培养不稳定，营养成分难以控制，会降低育肥效率，不利于牡蛎营养和风味的控制。本研究考察了用 0%、25%、50% 和 100% 的微胶囊配方饲料 (MD) 替代活微藻对葡萄牙牡蛎生长、营养成分和风味相关化合物的影响。牡蛎在… •引用：3D 水动力-生物模型在季节性…中的应用
Türkçe Haber Sınıflandırmada BERTurk、DistilBERTurk 和 mBERT 模型分析
Ş Evran, R Özdağ
Veri akış hızının ve hacminin baş edilmesi zor seviyelerde olduğu dijital ortamlardaverilerin sınıflandırılması önemlidir。但是，请注意，请注意以下事项：我们对安全进行了批判。Haber 是我的家庭成员，在数字媒体平台上提供了指导和分类，以便为您提供更好的服务。Bu çalışmada … •引用：通过减少磷来遏制湖泊富营养化取得了成功 此消息由 Google 学术搜索发送，因为您正在关注 Robert Hecky 撰写的文章的新引用。取消提醒
Regional Studies in Marine Science
评估边缘栖息地的环境适宜性：对珊瑚礁恢复潜力的影响
Funty Septiyawati Polapa, Jamaluddin Jompa, Suharto M. Ali et al.
恢复珊瑚礁需要对边缘栖息地有严格的了解，这些栖息地的环境压力将珊瑚推向生存极限。本研究通过整合卫星浊度数据、原位水质测量、底栖覆盖分析和珊瑚群落调查，评估了印度尼西亚 BoneGulf 和望加锡海峡珊瑚群落的环境适宜性和恢复潜力。我们的研究结果确定了慢性沉积压力，量化为持续……•引用：内陆水域有害藻华
Perubahan Iklim 和 Kejadian Ledakan Alga Berbahaya 和 Implikasinya terhadap Kesihatan Manusia：Tinjauan Sistematik
NA Ayub, R Hod, NA Masdor, R Hod, MH Ja'afar - International Journal of Public …, 2026
方法：本综述使用选定的关键词从 PubMed、Scopus 和 Web of Science (WOS) 等主要数据库收集证据。文章选择以特定研究主题为指导，并基于预定义的纳入和排除标准。结果：筛选出 20 篇文章，其中 15 篇原创研究论文和 5 篇 2000 年至 2024 年间发表的综述文章。研究结果表明，HAB 经常与气候变化因素相关，例如……•引用：全球藻华研究科学知识图谱分析
Environmental Science &
Technology
光降解释放了青藏高原河流的多年冻土碳
Ting Wang, Wenjie Hong, Leyan Feng et al.
摘要
青藏高原的高海拔河流是独特的光化学反应器，强烈的太阳辐射与古老的碳库相互作用，从根本上重塑了溶解有机物（DOM）的命运。基于同位素示踪剂（δ2H、δ18O、δ3H、Δ14C 和 δ13C）以及雅鲁藏布江沿岸确定的 7979 个独特分子式的分子水平表征，我们揭示了阳光和碳源对 DOM 循环的协同控制。同位素特征表明大量的“旧水”（即冰川融水）输入，并证实永久冻土衍生的碳是老化沉积有机质的主要来源。分子分析表明，芳香族DOM主要由陆地木质素和单宁类化合物组成，具有高度光反应性，强烈的阳光会促进其脱芳构化和氧化。芳香族 DOM 的光降解产物与 Fpre1953 相关 DOM 的分子式有 26.8% 相同，与多年冻土衍生的 DOM 有 44.8% 的分子式相同。这一过程将以前稳定和古老的碳释放为不稳定的部分，从而增强河流碳矿化。释放的古老 DOM 显示出更高的生物利用度，可能促进 CH4/CO2 排放和汞积累。我们的研究确定高海拔河流是重要的光化学中心，可以调动冰冻圈有机碳，这意味着在变暖的高山地区会产生积极的气候反馈。
Open Access
RSC Advances
雨水对废水中元素和有机污染物的影响
Jingyi Zhou, Raees Ahmad, Peiying Wang et al.
雨水影响废水排放的元素、有机物和毒性特征。
Open Access
Angiogenesis
RORα 的骨髓缺陷加剧了脂质失调和激光诱导的脉络膜新生血管形成
Neetu Kushwah, Chi-Hsiu Liu, Kiran Bora et al.
脂质和胆固醇代谢失调与年龄相关性黄斑变性 (AMD) 的发病机制有关，AMD 是视力丧失的主要原因。视黄酸受体相关孤儿受体 α (RORα) 是一种与新生血管性 AMD 遗传相关的脂质敏感核受体。我们研究了 RORα 通过介导骨髓细胞脂质稳态来调节 AMD 样病理和激光诱导脉络膜新生血管 (CNV) 中的作用，并且…… 引用：核受体与眼部疾病之间的关联
Open Access
Environmental Monitoring and Assessment
大型无脊椎动物群落对阿巴拉契亚中部受采矿影响的源头河流内的水质和栖息地的空间格局做出反应
Melanie McMillan, Stephen Schoenholtz, Sally Entrekin et al.
摘要
阿巴拉契亚中部（美国）的露天煤矿开采经常导致源头河流盐化，有记录显示几种大型无脊椎动物类群的损失以及不同电导率（SC）不同的河流群落指标的变化。然而，盐碱化在多大程度上改变了这些源头河流中水化学和大型无脊椎动物群落的河内模式，目前尚不清楚。在这里，我们的目的是研究大型无脊椎动物群落对六个阿巴拉契亚源头水流（四个盐化和两个参考）内的物理和化学梯度的反应。我们评估了两个季节中每条溪流 1.5-2.8 公里范围内六到九个地点的底栖大型无脊椎动物、栖息地属性和水化学。常用的群落组成指标表现出所有河流的流内变异性，突显了通常通过一个采样地点进行的河流评估的潜在缺点。正如预期的那样，这些指标还显示出与流内尺度的 SC 的相关性，特别是在 SC 梯度较大的流中。扩展分析强调了群落组成的其他驱动因素，包括溶解养分、硬度、河床坡度和/或基质。此外，对每条溪流中溪流内梯度的响应不同的类群，我们将其归因于溪流之间独特的环境梯度。更好地了解盐化如何影响与源头系统中其他河流属性相关的河内模式，将有助于为生物评估方案提供信息，以更准确地评估河流状况，并为阿巴拉契亚中部地区和其他盐化系统的修复工作提供信息。
沉积记录揭示的三峡库一级区支流水华对内源营养积累的影响
宋增辉， 姚学杏， 杨光琅， 孔烨梅， 白果鑫， 张晓楠… - 湖泊科学, 2025
三峡大坝已蓄水20余年，库区超过50%的一级支流持续暴发水华，其中主要以蓝藻、绿藻和藻甲为优势藻类。研究水华与内营养源积累的相互关系，将有助于预警预测库区水华的发生和生态环境变化。因此选择同位于三峡库区云阳县的备用一级支流——水华频发的澎溪河和水华偶发的磨刀溪，采集中游泥芯，对比分析在相似的气候和地理条件下水华对底泥沉积的影响。通过210Pb定年法测定，澎溪河蓄水后的泥芯沉积深度为45厘米，沉积速率为2.25 cm/a ... •引用：中国太湖的饮用水危机：与气候的联系... 此消息由Google Scholar 发送，因为您正在关注对秦伯强撰写的文章的新引用。取消提醒
Open Access
上升、下降、停滞：英国河流中复杂的生物多样性轨迹
Mansi Mungee, Martin Wilkes, Vicky Bell et al.
淡水生态系统面临着巨大的人为压力，全球指标显示许多地区的生物多样性急剧下降。然而，在包括英国在内的欧洲部分地区，最近对长期监测数据集的几项分析记录了重大水质投资后大型无脊椎动物群落的广泛改善。尽管时间动态方面存在显着的站点级异质性，但基于空间聚合数据或简化的效应大小，这些收益通常被解释为全国统一的。因此，当地生物多样性动态的普遍性、分布和原因仍未得到很好的解决。我们利用来自英格兰环境局监测网络 803 个河流站点的大型无脊椎动物时间序列数据来解决这一差距。我们应用无监督、形状明确的时间序列聚类框架，将地点分类为不同的基于形状的聚类，以获得三个互补指标：社区的污染敏感性（Whalley、Hawkes、Paisley & Trigg (WHPT) 指数）、总丰度和 Simpson 多样性指数。然后，我们使用线性判别分析和非度量多维尺度来表征簇之间的分类和环境差异。最后，我们使用贝叶斯方差分区模型量化了时间轨迹如何在日益聚合的空间尺度（地点、水体、流域、类型、区域）中构建，从而首次对英国河流大型无脊椎动物趋势进行多指标、多尺度评估。总体而言，我们的分析揭示了生态轨迹的显着异质性：尽管许多地点显示出改善趋势，但超过一半（约 53%）处于下降或缺乏明确的方向变化。持续增加或减少的地点在纵向位置、河道形态和水化学方面存在显着差异，表明网络布局和当地环境背景调节了河流生物多样性的变化。方差划分表明，最可解释的变化存在于地点和类型层面，这表明更广泛的区域或国家摘要可以掩盖非线性、地点层面的轨迹和持续的局部下降的马赛克。总的来说，这些发现证实英国河流的淡水生物多样性变化不能用国家甚至区域的恢复叙述来概括，而是代表了异步的、特定地点的轨迹的马赛克。这些结果表明，需要对密集、长期的河流监测网络进行新的投资，这些网络能够解决跨层次空间尺度的生物多样性变化。
Open Access
Environmental Science and Ecotechnology
双重约束空间规划开启中国海岸线积极主动的蓝碳扩张
Yang Xu, Tianci Gu, Feng Xu et al.
沿海蓝碳生态系统（红树林、盐沼和海草）提供了重要的气候缓解效益，使其处于全球 30×30 保护议程的最前沿。要在复杂的沿海过渡区最大限度地发挥这些效益，需要将内在生态适宜性与人类威胁相协调的空间框架。然而，现有的潮间带栖息地保护评估在很大程度上仍然是被动的、支离破碎的，并且对累积土地视而不见……•引用：美国太平洋沿海湿地的恢复力和对海平面的脆弱性……
Open Access
Quaternary Science Reviews
蝙蝠鸟粪对美国东南部全新世人为火灾影响的看法
Sara Bauer, Alexandra Tsalickis, Elizabeth Burt et al.
纵观历史，人类一直影响着火灾状况。然而，在北美东部，人类对火灾影响的开始时间仍然存在争议。确定这一时间的主要问题是在古环境记录中很难区分人为火灾和自然发生的火灾。在这里，我们展示了来自美国东南部全新世蝙蝠粪便核心的木炭数据，无档案和代理组合最近被证明可以可靠地记录……•引用：花粉组合和环境 DNA 变化：4300 年……
Open Access
Environmental Science and Pollution Research
从环境负担到资源潜力：环境影响评估和从废弃金矿废物中回收关键原材料......
Linda Zaniboni, Alessandro Cavallo, Domenico Antonio De Luca et al.
摘要
以前采矿活动产生的采掘废物 (EW) 会造成长期的环境影响，同时也是一种潜在的二次资源。在循环经济框架内，电子水可以被用来回收原材料（RM）和关键原材料（CRM），从而有助于战略资源的供应。在安萨斯卡山谷（意大利皮埃蒙特），克罗塞特和佩斯塔雷纳金矿一直运营到 20 世纪中叶，生产了大量电子战。这些材料对土壤和水体造成了持续污染，特别是砷和其他潜在有毒元素 (PTE)。该研究的目的是 i) 评估环境污染和生态风险，以及 ii) 评估从电子战中回收 CRM 的潜力。为此，该研究结合了来自不同采样活动的土壤和电子水的矿物学和地球化学数据。结果显示 CRM 显着富集，特别是 As，其次是 W、Sb、Bi，以及一些轻稀土元素（La、Ce、Pr、Nd）的少量富集。环境影响评价确定As为主要污染物，将土壤分类为重度至极度污染，另外还有Pb和Co的中度污染，总体生态风险为中等。EW 的估计量和所选 CRM（A、Bi、Sb、W）的残留量表明存在同时回收的潜力，其中 As 是主要目标。研究结果表明，这种方法可以代表修复项目中的可持续干预，将环境风险缓解与宝贵资源的回收和供应安全结合起来。
Limnology and Oceanography: Methods
重新审视湖泊养分预算以预测湖内养分浓度以供研究、监测和管理
Brooke G. Bain‐White, Ashley P. Ballantyne, Robert O. Hall et al.
摘要
养分预算可用于预测湖内养分浓度。这样做的主要挑战是估计永久埋藏，从而开发出机械、半机械和经验模型来量化这种损失过程。数据要求或稳态的基本假设可能会限制这些模型的适用性。在这里，我们提供了一个框架，用于使用有限的经验数据、公开数据和简单的统计模型来推导和同步营养物预算的流入和流出估计。我们使用古湖泊学方法来估计永久埋葬。我们为美国蒙大拿州麦克唐纳湖制定了 2008-2023 年水年的养分预算。我们将我们的养分流入和流出估计以及养分预算的预测能力与作为 1975 年国家富营养化调查的一部分为麦克唐纳湖生成的估计进行了比较，该调查使用更粗略的方法来估计来自支流和大气沉降的养分流入，并且没有纳入永久掩埋的估计。与 1975 年相比，我们估计麦当劳湖支流的养分负荷较低，大气中的磷含量较高，但氮负荷较低，并且最大的磷流出量是通过永久掩埋发生的。我们的预算对麦当劳湖养分浓度的预测 (RMSE: , ) 比 1975 年调查生成的预测 (RMSE: , ) 更准确。我们的预测预算为 2018 年通过模拟野火增强养分负荷检测到的养分富集事件提供了合理的解释。该方法可以补充湖泊采样并能够探索湖泊对环境变化的响应。
Open Access
ISME Communications
盐度和硅藻寄主群落沿着自然盐度梯度共同塑造壶菌寄生虫多样性
Jonna Kangas, Simon Bilik, Lumi Haraguchi et al.
摘要
壶菌门的寄生真菌是已知的浮游植物寄生虫，但对其多样性的驱动因素以及海洋和咸水生境中的宿主相互作用动态知之甚少。本研究以每两周一次的时间分辨率，研究了浮游植物春季开花期间沿波罗的海自然盐度梯度的浮游植物-壶菌关联的多样性和分布模式。使用单细胞挑选和测序（SCPS）将壶菌与其宿主物种直接连接，结合使用扩增子测序和定量成像流式细胞术进行群落组成分析，能够对宿主-壶菌相互作用的时空模式和沿盐度梯度的感染动态进行高分辨率分析。这表明寄生壶菌的相对丰度增加，并且在春季开花结束时浮游植物生物量增加。此外，SCPS揭示了5种新的壶菌-浮游植物关联，并将其序列与时空扩增子测序数据进行比对，显示盐度低于8的寄生壶菌具有更大的多样性和相对丰度。高于这个阈值，壶菌的多样性和丰度显着下降，与宿主群落更替和向海洋非真菌寄生虫的转变同时发生。这些结果表明，盐度主要通过其对宿主组成和寄生虫竞争的影响来构建壶菌群落，而不是仅仅通过直接的生理限制。我们的研究结果利用了多种方法的组合，以单细胞分辨率提供了关于与浮游植物大量繁殖相关的寄生壶菌驱动因素的新见解。我们的数据涵盖了空间盐度梯度和时间动态，强调了浮游植物大量繁殖在塑造真菌群落中的作用。
冰冻的道路和重复使用的路线：不断变化的北极中的驯鹿运动结构
Q Liao - 2026
动物迁徙取决于个体和种群在随时间变化的景观之间保持联系的能力。在北极系统中，这一挑战尤其严峻，因为雪、冰、开放水域、饲料、昆虫骚扰和人类干扰可能会改变可能移动的时间和地点。本论文研究了贫瘠地面驯鹿（Rangifer tarandus）动态景观如何以形状运动介导的连通性为特征……•引用：位于……之间的 24 个湖泊的物理和化学湖泊学。
Environmental Geochemistry and Health
沉积物衍生的腐殖质部分通过煅烧改性红粘土调节磷酸盐吸附和保留
Anqi Guo, Xuemei Chen, Tongtong Rao et al.
700°C 下生产的煅烧改性红粘土 (MRC-700) 已广泛应用于富营养化水域中的磷酸盐去除。然而，从沉积物中释放的腐殖质可能会干扰磷酸盐的固定并降低其保留稳定性。这项研究采用沉积物衍生的腐殖酸 (HA) 和黄腐酸 (FA) 作为代表性腐殖质部分，以检验它们以及关键水化学参数对磷酸盐吸附、竞争和释放行为的影响……•引用：内部磷机制的空间异质性……
Open Access
Nature Communications
全球线粒体基因组图谱阐明了淡水微真核生物多样性
Lucas Serra Moncadas, Hans-Joachim Ruscheweyh, Jason Woodhouse et al.
摘要
环境基因组学改变了我们对微生物世界的看法，但进展仍然主要以原核生物为中心。在微生物真核生物中，不一致的标记选择和有限的物种水平分辨率削弱了多样性估计并阻碍了交叉研究合成。因此，区域到全球的丰富度、周转率和系统发育结构的梯度仍然没有得到很好的解决。在这里，我们建立了一个基于线粒体基因组的全球框架，将鸟枪法宏基因组转化为物种解析、系统发育锚定的清单。从跨越七大洲 362 个湖泊的 3,400 个宏基因组中，我们重建了约 20,000 个线粒体宏基因组组装的基因组 (mitoMAG)，密集地填充了真核生物树上以前稀疏的分支，特别是 SAR（原生藻纲 - 泡藻纲 - 根茎藻）、隐藻纲和 Haptista。根据经验校准的 98.1% mitoMAG 同一性阈值描绘了物种并将群落概况与进化主干联系在一起。在此主干上，覆盖标准化清单恢复了典型的生态模式：中营养丰富度峰值、系统发育宽度的表层扩展以及春季混合时具有最强表面-深层耦合的春季最大值；支持框架。将 mitoMAG 视为无引物条形码会产生单一的、物种级的、系统发育感知的货币，使丰富性、均匀性和系统发育宽度在数据集、深度、季节和区域之间直接可比。通过将微生物真核生物置于与原核生物相当的分析基础上，生成的图谱可以实现其多样性，并为未来的高通量、物种感知监测和生态预测奠定基础。
Journal of Geophysical Research: Biogeosciences
密集的养分输入增强了鱼塘沉积物的有机碳封存潜力
Hezhong Yuan, Qianhui Yuan, Tong Guan et al.
摘要
以有机碳（OC）形式埋藏在沉积物中是碳还原的关键途径。然而，鱼塘沉积物中的碳固定机制仍不清楚。在这项研究中，沉积物取自饲养不同鱼类的鱼塘。获得了不同的 OC 部分，包括微生物生物量碳 (MBC)、酶活性和碳吸收指数，包括微生物碳利用效率 (CUE)。使用 16S rRNA 高通量测序鉴定微生物群落。对编码卡尔文-本森-巴沙姆（CBB）循环的基因 cbbL 和 cbbM 进行了分析，以破译固碳细菌的群落组装调控。结果表明，养殖斑点叉尾鮰的鱼池具有较高的OC和营养成分。较高的 MBC 和 C 吸收因子表明，高营养物质通过微生物活动促进 MBC 合成和 OC 埋藏。与参与碳氮循环的酶不同，碱性磷酸酶（AP）与OC分数呈显着正相关。这种协同作用表明，AP主导了水中有机磷的矿化和磷酸盐的增加，从而促进了碳的同化和埋藏到沉积物中。此外，16S rRNA 和 CBB 循环基因表明，微生物群落结构随鱼塘类型的不同而显着变化。营养丰富的鱼塘表现出更丰富的优势细菌属。水产养殖类型耦合营养差异诱导微生物群落调节，进一步引发CUE反应和MBC富集。一般来说，营养驱动的 MBC 积累和微生物区系变化是 OC 封存的关键驱动因素。这些发现为鱼塘中有机碳固定机制提供了新的见解，并为加强全球碳减排管理提出了潜在的基于自然的解决方案。
Open Access
Estuaries and Coasts
脉冲事件会建造一个遗留的磷储层吗？亚热带河口沉积物磷的长期归宿和迁移案例研究……
Lee Potter, Ronald D. DeLaune, Ron Corstanje et al.
摘要
人们普遍认为，通过河流改道等脉冲事件输送到河口的磷 (P) 在接收沉积物中作为遗留磷积累，但其长期命运仍然没有得到很好的解决。邦尼特卡雷溢洪道的反复开放向庞恰特雷恩湖河口（路易斯安那州南部）输送大量沉积物、磷和淡水，导致有害藻华 (HAB) 和短期水质下降。为了测试这一点，我们绘制了表面沉积物（160 个地点）地图，将其与之前的调查进行了比较，并权衡了 25 年来溢洪道荷载（脉冲）与支流（压力）荷载和内部通量。七个开口的累积溢洪道负荷（268 天）贡献的总 P（TP；14,100 MT）比 25 年的支流流入（13,000 MT）更多，但变化图显示 TP 的空间结构重新分布从溢洪道向南部和西部边界移动，而不是盆地规模的富集。沉积物 P 仍然主要是无机物（约 90%），而有机物从 2003 年（3.1%）到 2023 年（5.95%）翻了一番，这与溢洪道驱动的水华后浮游植物衍生的生物量的埋藏一致。平流通量主导内部释放，平均 30.8 mg P m
− 2
d
− 1
风速超过 6 米秒后
− 1
与 0.13 mg P m 相比
− 2
d
− 1
用于扩散。这些结果共同支持了一种质量平衡，其中溢洪道输送的磷被暂时保留，然后重新分配，部分作为有机磷被封存，部分通过风驱动的冲刷导出到沿海海洋。因此，仅沉积物测绘不足以追踪脉冲负载下的遗留 P；需要流域规模的负荷预算与内部释放率测量相结合来解决转移营养物的命运。