Marine environmental research最新文献_第4页

Monsoon mysteries: Impact of rainfall-induced hydrographic changes on coastal zooplankton communities 季风之谜：降雨引起的水文变化对沿海浮游动物群落的影响。

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2026-01-29 DOI: 10.1016/j.marenvres.2026.107896

Tanmoy Nandy , Sabyasachi Sautya , Santosh Gaikwad , Rakesh P.S. , Balaram Sahu

In tropical coastal ecosystems, monsoonal rainfall is a critical driver of seasonal variability, inducing shifts in hydrological parameters such as temperature, salinity, and nutrient concentrations, which subsequently regulate zooplankton community structure. This study investigated the influence of the southwest monsoon on coastal water quality and zooplankton composition along the Mumbai coast, India. Sampling was conducted in the pre-monsoon (May 2022) and post-monsoon (September 2022) periods, corresponding to early (EMP) and later (LMP) monsoonal phases, during which the region receives 1500–2000 mm of precipitation. Analyses revealed distinct hydrological changes and a significant reorganisation of the zooplankton assemblage between phases. Total zooplankton abundance was lower in the EMP compared to the LMP. Among the 25 taxonomic groups identified, Copepoda dominated the community, represented by 27 species (23 Calanoida, 2 Harpacticoida, and 2 Cyclopoida), with families Acartidae and Paracalanidae comprising 70 % of the copepod population. Statistical and biological trait-based analyses demonstrated significant temporal shifts in copepod community composition and functional structure. Temperature, salinity, and nutrient levels were identified as the primary environmental factors shaping the distribution of copepod functional groups. Eleven copepod taxa served as indicator species for specific monsoonal phases. Trophic structure analysis showed a prevalence of omnivorous copepods during the EMP, likely due to reduced phytoplankton availability under lower nutrient concentrations and fluctuating salinity, favouring opportunistic feeding. In contrast, the LMP, characterised by elevated nutrient inputs and stabilised salinity, supported a more complex food web with a balanced representation of herbivorous, omnivorous, carnivorous, and detritivorous functional groups. Herbivores were numerically dominant in both periods. The increased co-dominance of meroplankton (pelagic larvae of benthic invertebrates) during the LMP highlighted their ecological role in coupling benthic and pelagic subsystems. These findings elucidate the mechanistic links between monsoonal hydrography and zooplankton functional ecology, providing a scientific basis for informed conservation and management of monsoon-influenced coastal ecosystems.

在热带沿海生态系统中，季风降雨是季节变化的关键驱动因素，引起温度、盐度和营养物质浓度等水文参数的变化，进而调节浮游动物群落结构。本文研究了西南季风对印度孟买沿岸水质和浮游动物组成的影响。在季风前（2022年5月）和季风后（2022年9月）进行了采样，对应于季风早期（EMP）和后期（LMP）阶段，在此期间该地区收到1500-2000毫米的降水。分析揭示了不同阶段之间明显的水文变化和浮游动物组合的显著重组。与LMP相比，EMP中的浮游动物总丰度较低。在鉴定的25个类群中，桡足类占主导地位，有27种（鹭足类23种、羽足类2种、环足类2种），其中笛足科和副笛足科占总数的70%。基于统计和生物学性状的分析表明，桡足动物群落组成和功能结构在时间上发生了显著的变化。温度、盐度和营养水平是影响桡足类功能群分布的主要环境因素。11个桡足类类群可作为特定季风期的指示种。营养结构分析显示，在EMP期间，杂食性桡足类动物普遍存在，这可能是由于在较低的营养浓度和波动的盐度下浮游植物的可用性减少，有利于机会性捕食。相比之下，LMP的特点是营养投入增加，盐度稳定，支持更复杂的食物网，具有草食性、杂食性、肉食性和营养官能团的平衡代表。在这两个时期，食草动物在数量上都占主导地位。在LMP期间，浮游生物（底栖无脊椎动物的上层幼虫）的共同优势增加，突出了它们在底栖和上层子系统耦合中的生态作用。这些发现阐明了季风水文与浮游动物功能生态学之间的机制联系，为季风影响的沿海生态系统的知情保护和管理提供了科学依据。

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引用次数: 0

Rising herbivory pressure of Sarpa salpa and the emerging threat to Southern European marine forests 萨尔巴萨尔巴不断上升的食草压力和对南欧海洋森林的新威胁

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2026-01-28 DOI: 10.1016/j.marenvres.2026.107884

J. de Azevedo , J.N. Franco , M. Dolbeth , H.S. Meyer , A. Barreiro , E.A. Salas-Leitón , F. Arenas

Climate change (CC) is driving shifts in marine ecosystems, particularly affecting temperate and subtropical marine forests, which are critical for biodiversity and ecosystem stability. Dominated by canopy-forming seaweeds, these forests are sensitive to CC-induced stressors, such as rising temperatures and tropicalisation, which favour turf-forming algae and increase the abundance of herbivorous fish, threatening ecosystem structure and function. Along the western coast of Portugal in Southern Europe, the herbivorous fish Sarpa salpa plays a key role in tropicalisation, potentially exacerbating the decline of cold-water seaweeds, whilst the Iberian upwelling system may offer localised protection through cooler conditions. This study combines stomach content analysis, subtidal surveys, functional trait analyses, fish landing records, and sea surface temperature (SST) data across the North, Centre, and South regions to assess the ecological role of S. salpa. Results confirmed a preference for brown algae, including habitat-forming species, with clear regional variation: kelps dominated diets in the North, whilst Cystoseira s.l. and turf-forming species prevailed in the Centre and South. Fish landing analyses revealed region-specific dynamics: landings in the North increased with higher SST, those in the Centre were unaffected by temperature, and those in the South were negatively correlated with SST. These findings highlight the potential threat of S. salpa to temperate marine forests under CC.

气候变化正在推动海洋生态系统的变化，特别是影响到对生物多样性和生态系统稳定至关重要的温带和亚热带海洋森林。这些森林以形成树冠的海藻为主，对气候变化引起的压力敏感，如温度上升和热带化，这有利于形成草坪的藻类和增加草食性鱼类的丰度，威胁到生态系统的结构和功能。在南欧的葡萄牙西海岸，草食性鱼类萨尔帕萨尔帕在热带化中起着关键作用，可能会加剧冷水海藻的减少，而伊比利亚上升流系统可能会通过较冷的条件提供局部保护。本研究结合胃内容物分析、潮下调查、功能特征分析、鱼类登陆记录和北、中、南三个区域的海温数据，评估了萨尔帕的生态作用。结果证实了对褐藻的偏好，包括栖息地形成物种，具有明显的区域差异：北部以海带为主，而中部和南部则以Cystoseira s.l.和草坪形成物种为主。鱼类登陆分析揭示了区域特有的动态：北部的登陆量随着海温的升高而增加，中部的登陆量不受温度的影响，南部的登陆量与海温呈负相关。这些发现突出表明，在CC条件下，salpa对温带海洋森林的潜在威胁。

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引用次数: 0

Genomic resilience to sequential environmental perturbations in two sympatric costal fish species 两种同域沿海鱼类对连续环境扰动的基因组恢复力

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2026-01-28 DOI: 10.1016/j.marenvres.2026.107893

Maribet Gamboa , Florence Tellier , Constanza Millán-Medina , Diego Silva , Eduardo Hernández-Miranda

Natural disasters impose acute environmental stressors that can drastically reshape marine populations. Abrupt changes in habitat, resulting from hypoxia due to upwelling and seismic-induced tsunamis, are known chronic events, but their effects on marine taxa are poorly studied. This study investigates the genomic and mitochondrial responses of two coastal fish species, Aphos porosus and Normanichthys crockeri, to two sequential disturbances: a hypoxic upwelling event in 2008 and a seismic-induced tsunami in 2010 in Coliumo Bay, Chile. Whole-genome and mitochondrial DNA analyses may reveal strong genetic differentiation and reduced genetic diversity in N. crockeri, indicating a demographic bottleneck and adaptive shifts. While A. porosus could exhibited genomic resilience, likely due to parental care and sex-biased dispersal, with moderate mitochondrial divergence and increased matrilineal diversity post-disturbance. Functional annotations highlighted possible signatures of stress response, metabolic adaptation, and mitochondrial plasticity. These findings may underscore the complex interplay of ecological traits, environmental stressors, and genetic mechanisms driving population resilience and structuring in marine systems.

自然灾害造成了严重的环境压力，可以极大地重塑海洋种群。由于上升流和地震引起的海啸引起的缺氧导致栖息地的突然变化是已知的慢性事件，但它们对海洋分类群的影响研究很少。本研究调查了两种沿海鱼类，Aphos porosus和Normanichthys crockeri对两个连续干扰的基因组和线粒体反应：2008年缺氧上升流事件和2010年智利Coliumo湾地震引发的海啸。全基因组和线粒体DNA分析可能揭示出克罗克氏北蝽强烈的遗传分化和减少的遗传多样性，表明种群瓶颈和适应性转变。然而，由于亲代抚育和性别偏倚的分散，棘豆可能表现出基因组弹性，线粒体分化适度，干扰后母系多样性增加。功能注释突出了应激反应、代谢适应和线粒体可塑性的可能特征。这些发现可能强调了生态特征、环境压力源和遗传机制之间复杂的相互作用，这些因素推动了海洋系统中种群的恢复力和结构。

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引用次数: 0

Relationships of the summer nutrient concentrations in the East China Sea with the Changjiang diluted water, upwellings and Kuroshio intrusion, from an interannual perspective 东海夏季营养物浓度与长江稀释水、上升流和黑潮入侵的年际关系

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2026-01-28 DOI: 10.1016/j.marenvres.2026.107891

Qingling Zhang , Xinyan Mao , Yifei Luo , Xinyu Guo , Jie Shi

In summer, the East China Sea (ECS) faces ecological challenges like harmful algal blooms, hypoxia, and jellyfish blooms, linked to nutrient distributions influenced by Changjiang Diluted Water (CDW), Kuroshio intrusion, and Zhejiang Coastal Upwelling (ZCU). The inconsistent interannual variations of these processes complicate nutrient dynamics. This study used the Empirical Orthogonal Function (EOF) analysis to reveal the interannual variations (1993–2022) of summer dissolved inorganic nitrogen (DIN) and dissolved inorganic phosphorus (DIP) concentrations in the ECS. We demonstrated that interannual variability in southerly wind strength was a key regulator controlling the relative influence of CDW and ZCU on surface nutrients. Weaker southerly wind combined with stronger Changjiang discharge (e.g., 1999, 2002, 2020) enhanced the nearshore influence of CDW and reduced the ZCU intensity. This suppressed DIP supply and biological consumption of DIN, leading to accumulated surface DIN but depleted surface DIP in the Zhejiang Coastal (ZC) region. Conversely, stronger southerly wind combined with stronger Changjiang discharge drove the CDW moving offshore that increased offshore DIN concentrations. Simultaneously, the stronger southerly wind also intensified ZCU that enhanced coastal DIP supply and biological DIN uptake, resulting in reduced coastal surface DIN. Critically, we identify the distinct drivers for bottom DIP. Weaker ZCU led to increasing (decreasing) of bottom DIP concentrations in an area deeper (shallower) than 20 m, while stronger Kuroshio intrusion substantially boosted bottom DIP, influencing productivity in both ZC region and the East Zhejiang coastal (EZC) region. The intricate interplay of these physically driven nutrient fluxes, characterized by differing N/P ratios, underpinned the ECS's complex and variable summer nutrient structures with profound implications for understanding its ecological responses.

在夏季，东海面临着有害藻华、缺氧和水母繁殖等生态挑战，这与长江稀释水（CDW）、黑潮入侵和浙江沿海上升流（ZCU）对营养物分布的影响有关。这些过程不一致的年际变化使养分动力学复杂化。本研究采用经验正交函数（EOF）分析，揭示了1993-2022年夏季ECS中溶解无机氮（DIN）和溶解无机磷（DIP）浓度的年际变化。结果表明，南风强度的年际变化是控制CDW和ZCU对地表养分相对影响的关键调节因子。较弱的南风与较强的长江流量（如1999年、2002年、2020年）相结合，增强了CDW对近岸的影响，减弱了ZCU强度。这抑制了DIP的供应和DIN的生物消耗，导致浙江沿海地区表面DIN积累而表面DIP耗竭。相反，较强的南风结合较强的长江流量驱动CDW向近海移动，使近海DIN浓度增加。同时，较强的南风也增强了ZCU，增加了海岸DIP供应和生物DIN吸收，导致海岸表面DIN减少。关键是，我们确定了底部DIP的不同驱动因素。较弱的ZCU导致20 m（浅）以下区域底部DIP浓度增加（减少），而较强的黑潮入侵显著提高了底部DIP浓度，影响了ZC区域和浙东沿海（EZC）区域的生产力。这些物理驱动的营养通量的复杂相互作用，以不同的N/P比率为特征，支撑了ECS复杂多变的夏季营养结构，对理解其生态反应具有深远的意义。

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引用次数: 0

Deeper waters, more calcifiers: Spatial variation in benthic assemblages highlight conservation challenges in sub-Antarctic Marine Protected areas 更深的水域，更多的钙化：底栖生物组合的空间变化突出了亚南极海洋保护区的保护挑战。

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2026-01-28 DOI: 10.1016/j.marenvres.2026.107889

Lucía Bergagna , Luciana Riccialdelli , Gustavo Lovrich , Gisela A. Morán , Laura Schejter , Gabriela Palomo , Ricardo Sahade

Marine Protected Areas (MPAs) aim to preserve species, habitats, and the Nature Contributions to People they support. In the sub-Antarctic MPAs Namuncurá – Burdwood Bank I and II, the primary conservation features are the rich and abundant benthic assemblages across two distinct habitats: the plateau and the slope of the bank. Currently, these MPAs face significant threats from anthropogenic CO₂ emissions, which drive climate change and ocean acidification processes. Here, we establish an ecological baseline by analysing the diversity and structural patterns of benthic assemblages to evaluate MPA effectiveness, monitor climate change impacts, and inform management strategies. Comparisons were performed across three areas: the MPA, the Beagle Channel, and the Atlantic shelf of Tierra del Fuego, and between zones and habitats within the MPA. Sampling was conducted at depths of 90–710 m using bottom trawls, with megafauna identified to the lowest possible taxonomic level. Uni- and multivariate analyses revealed marked differences across areas. A total of 236 taxa were distinguished, but only 16 were shared among all the three areas, while 167 were unique to the MPAs. The habitats were characterized by different biotas, with sponges (mainly Demospongiae) dominating shallower environments and calcifying taxa, such as corals and echinoderms, predominating in deeper habitats. High β-diversity turnover within the MPAs suggests that the current zonation may inadequately protect benthic habitats, which is further exacerbated by ocean acidification predictions. Our findings highlight the biodiversity and conservation value in two opensea sub-Antarctic MPAs, providing a basis for effective management and the assessment of ecological responses to environmental change.

海洋保护区（MPAs）旨在保护物种、栖息地以及它们所支持的自然对人类的贡献。在亚南极海洋保护区namuncura - Burdwood Bank I和II中，主要的保护特征是丰富的底栖生物组合跨越两个不同的栖息地：高原和河岸斜坡。目前，这些海洋保护区面临着人为二氧化碳排放的重大威胁，二氧化碳排放推动了气候变化和海洋酸化过程。在此，我们通过分析底栖生物群落的多样性和结构模式来建立生态基线，以评估海洋保护区的有效性，监测气候变化的影响，并为管理策略提供信息。在三个区域进行了比较：海洋保护区、比格尔海峡和火地岛的大西洋大陆架，以及海洋保护区内的区域和栖息地之间的比较。利用底拖网在90-710米的深度进行取样，在尽可能低的分类水平上确定了巨型动物。单变量和多变量分析显示了不同地区之间的显著差异。共鉴定出236个分类群，但3个地区共有的分类群只有16个，167个是保护区特有的。浅层以海绵类为主，深层以珊瑚、棘皮类等钙化类群为主。海洋保护区内β-多样性的高更替表明，目前的地带性可能无法充分保护底栖生物栖息地，海洋酸化预测进一步加剧了这一问题。本研究结果强调了两个亚南极公海海洋保护区的生物多样性和保护价值，为有效管理和评估生态对环境变化的响应提供了依据。

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引用次数: 0

Seismic acquisition causes substantial decrease in catch rates of commercially-important fish 地震采集导致具有重要商业价值的鱼类捕捞率大幅下降

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2026-01-27 DOI: 10.1016/j.marenvres.2026.107886

Ian A. Knuckey , Matt Koopman , Brendan Kelaher , Russell B. Millar , Paul E. McShane

High intensity noise associated with seismic surveys of the sea floor can cause harm or alter the behaviour of aquatic animals. In south eastern Australia, a marine seismic survey (MSS) acquisition area overlapped with commercial fishing grounds on which eastern school whiting (Sillago flindersi) and tiger flathead (Platycephalus richardsoni) are targeted. To assess the effect on commercial catch rates of a MSS, commercial Danish seine vessels were deployed in stratified random surveys of seismic acquisition areas and adjacent control areas within a 11,000 km² fishing ground. Despite the considerable natural spatial and temporal variation in catch rates of each fish species, catch rates were reduced by 99 % for whiting and by 75 % for flathead immediately following the MSS compared with control areas. Significant negative impacts were observed to persist for at least 10 months for whiting. Although randomized survey data were not available from before the MSS, a M-BACI analysis of commercial logbook data in the years preceding and up to 10 months post seismic acquisition revealed a significant reduction in the catch rates of whiting, but not flathead. Cooperative fleet dynamics may have contributed to hyperstability of catch rates masking MSS effects on flathead. The lack of observed mortalities or visible physiological or morphological abnormalities for fish caught post-MSS indicates that either fish moved out of the MSS acquisition area or otherwise avoided capture. Overall, our results demonstrate that impacts of MSS on fisheries can range from negligible to substantial, depending on the species, location and extent of overlap of the MSS acquisition area with fishing grounds.

与海底地震调查有关的高强度噪音可能造成伤害或改变水生动物的行为。在澳大利亚东南部，一个海洋地震调查（MSS）采集区与商业渔场重叠，那里的目标是东部白鳕（Sillago flindersi）和平头虎（Platycephalus richardsoni）。为了评估MSS对商业捕捞率的影响，丹麦商业围网船在11,000平方公里渔场内的地震采集区和邻近控制区进行了分层随机调查。尽管每种鱼类的捕捞率在自然空间和时间上都有相当大的变化，但与对照区相比，在MSS之后，白头鱼的捕捞率下降了99%，平头鱼的捕捞率下降了75%。观察到明显的负面影响持续至少10个月。虽然没有MSS之前的随机调查数据，但对地震采集前几年和地震采集后10个月的商业日志数据进行的M-BACI分析显示，白斑捕获率显著降低，但平头捕获率没有下降。合作船队动力学可能有助于捕获率的超稳定性，掩盖了平头船的MSS效应。在MSS后捕获的鱼没有观察到死亡率或明显的生理或形态异常，这表明鱼要么离开了MSS获取区域，要么以其他方式避免捕获。总体而言，我们的研究结果表明，MSS对渔业的影响可以从微不足道到巨大，这取决于MSS获取区域与渔场的物种、位置和重叠程度。

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引用次数: 0

Resilience of the macroalgae Gongolaria barbata under ocean acidification: physiological responses and restoration perspective 海洋酸化条件下大型藻的恢复力：生理响应与恢复视角

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2026-01-27 DOI: 10.1016/j.marenvres.2026.107887

Ilaria D'Aniello , Maria Nardiello , Carmen Arena , Denis Badocco , Alberto Barausse , Alberto Colletti , Roberto Danovaro , Erika Fabbrizzi , Marta Formentin , Simonetta Fraschetti , Folco Giomi , Valerio Matozzo , Isabella Moro , Katiuscia Petrosillo , Chiara Silvestrini , Ermenegilda Vitale , Marco Munari

The increasing CO₂ concentration is a major cause of the climate change phenomenon. Concurrently, the same increase is leading to ocean acidification (OA), which is projected to decrease seawater pH by 0.4 units by 2100. Here we investigated the potential impacts of OA on the canopy-forming brown macroalga Gongolaria barbata from the Venice Lagoon. One-year-old individuals were maintained in mesocosms under two pH levels: 8.1 (current ambient value) and 7.7 (the end-of-the-century value predicted under the current scenario of anthropogenic CO₂ emissions). The physiological responses of the algae were assessed during the experiment in terms of oxygen production and consumption, and maximal PSII photochemical efficiency. At the end of the experiment, we analyzed the percentage of mature receptacles, algal growth rate and the total polyphenolic content and antioxidant capacity as indicators of the stress response. The significant decrease in polyphenolic content indicates the impairment of the defence mechanisms, which could make the algae more vulnerable to grazing under acidified conditions. Yet, conversely, our results suggest that changes in pH levels do not significantly affect the physiological processes, growth or fertility of the algae. These findings suggest that while OA may weaken defence mechanisms, the preservation of physiological and reproductive functions would still support the potential of G. barbata populations from the Venice Lagoon to act as donor sources for restoration efforts, highlighting their resistance to the acidified conditions expected in the future.

二氧化碳浓度的增加是气候变化现象的主要原因。与此同时，同样的增长正在导致海洋酸化（OA），预计到2100年将使海水pH值降低0.4个单位。本文研究了OA对威尼斯潟湖形成树冠的褐色巨藻（gonolaria barbata）的潜在影响。一岁大的个体被维持在两种pH水平下的中生态环境中：8.1（当前环境值）和7.7（在当前人为二氧化碳排放情景下预测的世纪末值）。在实验期间，对藻类的生理反应进行了评估，包括产氧量和耗氧量，以及最大PSII光化学效率。在试验结束时，我们分析了成熟容器百分比、藻类生长速度、总多酚含量和抗氧化能力作为胁迫响应的指标。多酚含量的显著降低表明防御机制受损，这可能使藻类在酸化条件下更容易受到放牧。然而，相反，我们的研究结果表明，pH值的变化不会显著影响藻类的生理过程、生长或繁殖。这些发现表明，虽然OA可能会削弱防御机制，但保留生理和生殖功能仍将支持威尼斯泻湖G. barbata种群作为恢复工作的供体来源的潜力，突出了它们对未来酸化条件的抵抗力。

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引用次数: 0

Distribution and partitioning of metals in surface sediments of a coastal river dominated ecosystem: Insights to geochemical fractionation, sources and ecological risk 沿海河流主导生态系统表层沉积物中金属的分布和分配：地球化学分异、来源和生态风险的启示

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2026-01-27 DOI: 10.1016/j.marenvres.2026.107892

Fiona Bassy William , Prasanna Mohan Viswanathan , Nagarajan Ramasamy , Chidambaram Sabarathinam , Vetrimurugan Elumalai

Riverine is the most vital ecosystem, which serves numerous important benefits to their locality, and it undergoes various chemical reactions that influence coastal water composition, nutrient cycling and broader geochemical processes. In this research, geochemical fractionation of metals with respect to the spatial distribution in the Miri River was examined. Initially, pXRF survey was conducted to understand the spatial variability of metal concentrations in the river sediments. Subsequently, selected sediment samples in the vulnerable zones (upstream, mid-stream and downstream) were collected and extracted into different geochemical phases via sequential extraction method, and analysed for metal concentrations. From the pXRF results, the order of dominance of metals are as follows: Fe > Zn > Pb > Cr > Ni > Cu > Mn > Cd, in which the higher concentration of metals was observed in the downstream and upstream sections of the river. From the sequential extraction, most of the metals are associated with residual, Fe-Mn oxides and organic matter fractions, as absorbed phases with less mobile and less readily available condition. Factor analysis also confirms that Fe-Mn oxyhydroxides was the major geochemical phase to absorb metals from various sources including anthropogenic activities and chemical weathering. Various pollution indices have been used to assess the potential ecological risk of the river sediments. All the indices revealed the contamination level of river sediments, particularly the elevated concentration of Cd and Ni. From this study, sequential extraction offers insights into the fractionation, availability, and mobility of metals, which can aid in evaluating environmental contamination in the river.

河流是最重要的生态系统，它为当地提供了许多重要的利益，它经历了各种化学反应，影响沿海水的组成、营养循环和更广泛的地球化学过程。在这项研究中，金属的地球化学分异相对于在美里江的空间分布进行了研究。首先，通过pXRF调查了解河流沉积物中金属浓度的空间变异性。随后，在脆弱带（上游、中游和下游）选取沉积物样本，采用顺序萃取法提取不同地球化学相，分析金属浓度。从pXRF结果来看，金属的优势顺序为：Fe > Zn > Pb > Cr > Ni > Cu > Mn > Cd，其中下游和上游的金属含量较高。从顺序萃取中，大多数金属与残余、Fe-Mn氧化物和有机物组分相结合，作为吸收相，流动性较差，不易获得。因子分析也证实了铁锰氧化氢氧化物是主要的地球化学相，吸收各种来源的金属，包括人为活动和化学风化。利用各种污染指数对河流沉积物的潜在生态风险进行了评价。所有指标都反映了河流沉积物的污染程度，特别是Cd和Ni的浓度升高。从这项研究中，顺序提取提供了对金属的分异、可用性和流动性的见解，这有助于评估河流中的环境污染。

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引用次数: 0

Habitat suitability model for predicting the occurrence of scleractinian cold-water corals in the Gulf of Naples (Tyrrhenian Sea): A tool for restoration planning and governance of deep-sea ecosystems 那不勒斯湾（第勒尼安海）冷珊瑚生境适宜性预测模型：深海生态系统恢复规划和治理的工具。

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2026-01-25 DOI: 10.1016/j.marenvres.2026.107879

Fabio Di Giovanna , Giorgio Castellan , Michela Angiolillo , Vincenzo Botte , Simonetta Fraschetti , Valentina Grande , Daniele Iudicone , Florian Kokoszka , Paolo Montagna , Mariacristina Prampolini , Giorgio Simone , Marco Taviani , Maria Letizia Vitelletti , Federica Foglini

Cold-water corals (CWCs) are key ecosystem engineers in deep-sea habitats, yet their distribution in the Gulf of Naples remains poorly known. Here, we applied a Maximum Entropy (MaxEnt) model with high-resolution environmental predictors to investigate the fine-scale suitability of scleractinian CWCs within the Gulf of Naples and adjacent areas. Presence records were derived from Remotely Operated Vehicles (ROV) video analyses, while predictors included bottom current velocity from a Regional Ocean Modeling System (ROMS) simulation and geomorphological variables from multibeam bathymetry (bathymetric position index, slope, roughness, aspect, and backscatter).

The model predicted ∼0.43 km² of suitable habitat (suitability index >0.6) corresponding to 0.09 % of the entire study area, mainly along canyon walls and elevated seabed features of the Dohrn Canyon. Additional suitable areas were identified in the deeper canyon sectors and south of Ischia Island. Current velocity at the bottom influenced the most our model, with high suitability values obtained from 0.10 to 0.18 m/s, suggesting these as favorable conditions for sediment removal and food supply. The variable response curves documented that Bathymetric position index and roughness contributed to the model, with preferences for elevated seabed features and heterogeneous seafloor topography.

These findings highlight the role of bottom current velocity and topographic complexity in shaping CWCs habitats in the study region and reveal unexplored areas with high potential for coral occurrence. Model outputs provide a scientific basis for Natura 2000 site designation and support conservation and restoration strategies for vulnerable deep-sea ecosystems in the area.

冷水珊瑚（CWCs）是深海栖息地的关键生态系统工程师，但它们在那不勒斯湾的分布仍然鲜为人知。在这里，我们应用了一个具有高分辨率环境预测因子的最大熵（MaxEnt）模型来研究那不勒斯湾及其邻近地区的核裂性ccs的精细尺度适用性。存在记录来自远程操作车辆（ROV）视频分析，而预测因素包括来自区域海洋建模系统（ROMS）模拟的海底流速和来自多波束测深的地貌变量（测深位置指数、坡度、粗糙度、纵横向和后向散射）。该模型预测了约0.43 km2的适宜生境（适宜度指数>.6），占整个研究区的0.09%，主要沿多恩峡谷的峡谷壁和高架海底特征分布。在更深的峡谷部分和Ischia岛南部确定了其他合适的区域。底部流速对我们的模型影响最大，在0.10至0.18 m/s之间获得了很高的适宜性值，表明这些是沉积物去除和食物供应的有利条件。变量响应曲线记录了水深位置指数和粗糙度对模型的影响，并优先考虑了高架海底特征和不均匀海底地形。这些发现突出了海底流速和地形复杂性在研究区域内形成CWCs栖息地的作用，并揭示了尚未开发的具有高珊瑚发生潜力的区域。模型输出为自然2000站点指定提供了科学依据，并为该地区脆弱的深海生态系统的保护和恢复策略提供了支持。

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引用次数: 0

Rapid evolution of marine phytoplankton under global change: mechanisms, constraints, and ecological consequences 全球变化下海洋浮游植物的快速进化：机制、制约因素和生态后果

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2026-01-24 DOI: 10.1016/j.marenvres.2026.107885

Siyu Luan, Peixuan Liu, Bin Huang, Enqi Zhang, Junyan Li, Shuming Lin, Zihong Li, Tian Shen, Meimei He, Zexu Li, Jianrong Xia, Peng Jin

Marine phytoplankton are the foundation of oceanic food webs and play a pivotal role in global carbon cycling. As climate change accelerates, rising temperatures, ocean acidification, and nutrient stress impose unprecedented selective pressures on these organisms. Emerging evidence from experimental evolution, genomic studies, and modeling suggests that phytoplankton can undergo rapid adaptation over ecological timescales. Here, we synthesize current knowledge on the mechanisms of rapid evolution in marine phytoplankton, including phenotypic plasticity, standing genetic variation, and polyploidization. We highlight the interplay between short-term plastic responses and long-term genetic adaptation, and explore how these processes are constrained by metabolic trade-offs and evolutionary limits. Furthermore, we examine the ecological and biogeochemical consequences of rapid evolution, emphasizing feedbacks to primary production and global biogeochemical cycles. Finally, we discuss emerging methodological frameworks for predicting evolutionary responses under multi-stressor scenarios and propose key research priorities to integrate evolutionary dynamics into global change models.

海洋浮游植物是海洋食物网的基础，在全球碳循环中起着关键作用。随着气候变化的加速，气温上升、海洋酸化和营养压力对这些生物施加了前所未有的选择压力。来自实验进化、基因组研究和建模的新证据表明，浮游植物可以在生态时间尺度上经历快速适应。本文综述了海洋浮游植物快速进化的机制，包括表型可塑性、常值遗传变异和多倍体化。我们强调短期可塑性反应和长期遗传适应之间的相互作用，并探讨这些过程如何受到代谢权衡和进化限制的约束。此外，我们研究了快速进化的生态和生物地球化学后果，强调了对初级生产和全球生物地球化学循环的反馈。最后，我们讨论了预测多压力情景下进化反应的新兴方法框架，并提出了将进化动力学整合到全球变化模型中的关键研究重点。

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引用次数: 0