Estuarine Coastal and Shelf Science最新文献_第8页

How vegetation of Aninga (Montrichardia linifera) shapes meiofauna and nematoda in an urban Amazonian estuary? 在亚马逊河口的城市中，阿尼加（Montrichardia linifera）的植被是如何塑造小型动物和线虫的？

IF 2.6 3区地球科学 Q1 MARINE & FRESHWATER BIOLOGY

Estuarine Coastal and Shelf Science

Pub Date : 2025-11-14 DOI: 10.1016/j.ecss.2025.109597

Ana Beatriz Moreira Ferreira-Ramos , Virág Venekey , Thuareag Monteiro Trindade dos Santos

This study compares, for the first time, the temporal variations in the structure of meiofauna community, with emphasis in nematodes, between areas with or without presence of the Aninga macrophyte (M. linifera) in an urban Amazonian estuary. For this purpose, monthly samplings were carried during one year, divided into four climatic periods (Transition 1, Dry, Transition 2 and Rainy), in areas with and without vegetation in the Guajará River estuary, North Brazil. The two environments showed a similar granulometric composition comparing periods, mainly composed by fine sediments. Organic matter showed similar values throughout periods, with the highest concentration during Transition 1 (T1). Meiofauna was represented by 12 groups, with Nematoda as the most abundant group during all study. Density showed highest values during T1, while richness was highest during the dry and T2 periods. Nematoda was composed by 89 genera belonging to 39 families, with Zygonemella as the most abundant genus, belonging to Xyalidae, the most abundant and richest family. The highest density and richness of genera occurred during the T2 period in the vegetated environment. Overall, this study showed that both meiofauna and nematodes were influenced by the seasonality of rainfall, the amount of nutrients available in the sediment and also by the presence of vegetation.

本研究首次比较了亚马逊河口地区有或没有大型植物（M. linifera）存在的地区，以线虫为重点的小型动物群落结构的时间变化。为此，在巴西北部瓜哈尔河口有植被和没有植被的地区，在一年的时间里每月进行采样，分为四个气候期（过渡1、干旱、过渡2和多雨）。两种环境的粒度组成相似，主要由细粒沉积物组成。有机质在各时期的含量基本一致，在过渡1 （T1）期间浓度最高。在所有研究中，以线虫为最丰富的类群。密度在T1期最高，丰富度在干燥期和T2期最高。线虫由39科89属组成，其中线虫属数量最多，属数最多，属数最多，属数最多。植被环境中植物密度和丰富度在T2期最高。总的来说，这项研究表明，小动物和线虫都受到降雨季节性、沉积物中可用营养物质数量以及植被存在的影响。

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引用次数: 0

Spatial and temporal modelling of seagrass distribution in Moreton Bay, Australia, based on long-term citizen science data 基于长期公民科学数据的澳大利亚摩顿湾海草分布时空模拟

IF 2.6 3区地球科学 Q1 MARINE & FRESHWATER BIOLOGY

Estuarine Coastal and Shelf Science

Pub Date : 2025-11-12 DOI: 10.1016/j.ecss.2025.109611

E. Ovsyanikova , W.N. Venables , J.W. Udy

Seagrasses are essential for coastal carbon sequestration and the survival of marine fauna worldwide. Regular seagrass monitoring is essential for coastal conservation as such areas are susceptible to rapid decline usually due to anthropogenic influence. We used long-term (2015–2021) supervised citizen science data collected in Moreton Bay (Quandamooka), Australia, to investigate temporal change over a seven-year period and developed a random forest seagrass distribution model, using depth, water quality, and other predictor variables. We used hierarchical clustering to define seagrass groupings, which resulted in five clusters, named after the dominant seagrass species: ‘OS’ (Oceana serrulata), ‘ZM’ (Zostera muelleri), ‘HS’ (Halophila spinulosa), ‘HO’ (Halophila ovalis), and ‘Sparse’, the cluster with little or no seagrass present. To investigate temporal change in seagrass meadows during our study period, we conducted a longitudinal analysis of overall seagrass cover and seagrass cluster dominance using areas that had a sufficient number of samples in at least three consecutive time periods.

The predictive model produced a probability map of seagrass occurrence in Moreton Bay, explaining 86.7 % of the variability. It highlighted areas of the bay that would suffer from continuing water quality decline. Longitudinal analysis showed a decrease in seagrass presence in shallow water areas, of several areas of the bay across the study period (2015–2021), and changes in seagrass community composition across the bay.

Our results demonstrate the effective use of citizen science-collected data and statistical modelling techniques to understand the spatial and temporal variability of seagrass communities.

海草对沿海固碳和全球海洋动物的生存至关重要。定期监测海草对海岸保护至关重要，因为这些地区通常由于人为影响而容易迅速减少。我们使用在澳大利亚莫顿湾（Quandamooka）收集的长期（2015-2021）监督公民科学数据，研究了7年期间的时间变化，并使用深度、水质和其他预测变量开发了随机森林海草分布模型。我们使用分层聚类来定义海草群，结果得到了五个以优势海草物种命名的群集：‘ OS ’ （Oceana serrulata）， ‘ ZM ’ （Zostera muelleri）， ‘ HS ’ （Halophila spinulosa）， ‘ HO ’ （Halophila ovalis）和‘ Sparse ’（很少或没有海草存在的群集）。为了调查研究期间海草草甸的时间变化，我们对总体海草覆盖和海草集群优势度进行了纵向分析，使用至少连续三个时间段的样本数量足够的区域。该预测模型生成了莫尔顿湾海草发生的概率图，解释了86.7%的变异性。它强调了海湾地区将遭受水质持续下降的影响。纵向分析显示，在研究期间（2015-2021年），海湾几个地区的浅水区海草数量减少，整个海湾的海草群落组成发生了变化。我们的研究结果展示了公民科学收集数据和统计建模技术的有效使用，以了解海草群落的时空变化。

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引用次数: 0

Factors constraining the morphodynamics of tidal meanders in non-vegetated tidal flats under a monsoon climate 季风气候下无植被潮滩潮曲形态动力学的制约因素

IF 2.6 3区地球科学 Q1 MARINE & FRESHWATER BIOLOGY

Estuarine Coastal and Shelf Science

Pub Date : 2025-11-12 DOI: 10.1016/j.ecss.2025.109606

Hoi-Soo Jung , Keunyong Kim , Junho Lee , Joo-hyung Ryu , Hanjun Woo

Tidal meanders, comprising large-scale channels, medium-sized creeks, and small-sized gullies, serve as critical lifelines supporting tidal flat ecosystems. While extensive research has been conducted on vegetated meanders in terrestrial and coastal environments, the morphodynamics of tidal meanders in non-vegetated tidal flats, particularly those influenced by monsoonal climates, remain poorly explored. This study investigates the migration dynamics of tidal meanders across three distinct non-vegetated tidal flats along the west coast of Korea, each differing in tidal range, embayment geometry, and surrounding topography. Based on over a decade of Google Earth imagery, migration rates were analyzed according to meander size. The results reveal that smaller meanders exhibit faster migration rates when normalized by channel width. Furthermore, the migration rates of tidal meanders in non-vegetated flats were found to be approximately an order of magnitude higher than those reported in the literature for vegetated environments such as salt marshes. The results also highlight significant differences in migration rates among the analyzed tidal flats, driven primarily by variations in tidal range and exposure to the northwesterly East Asian Winter Monsoon. These findings highlight the complex interactions between hydrodynamic, climatic and geomorphological factors in the dynamic evolution of tidal flat meanders.

潮汐曲流是支撑潮滩生态系统的重要生命线，由大型河道、中型小溪和小型沟渠组成。虽然对陆地和沿海环境中有植被的曲流进行了广泛的研究，但对无植被的潮滩中潮汐曲流的形态动力学，特别是受季风气候影响的潮汐曲流的研究仍然很少。本研究调查了沿韩国西海岸三个不同的无植被潮滩的潮汐曲流的迁移动力学，每个潮滩在潮差，海湾几何形状和周围地形上都有所不同。根据十多年来的b谷歌地球图像，根据曲流大小分析了迁移率。结果表明，当按河道宽度归一化时，较小的曲流表现出更快的迁移速率。此外，发现无植被滩地潮汐曲流的迁移速率比文献中报道的盐沼等植被环境的迁移速率大约高一个数量级。研究结果还强调了所分析的潮滩之间迁移率的显著差异，这主要是由潮差的变化和暴露于东亚西北冬季季风的影响所致。这些发现强调了水动力、气候和地貌因素在潮滩曲流动态演变中的复杂相互作用。

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引用次数: 0

Characteristics of benthic microeukaryotic communities in different ecosystems of the Yellow River Estuary salt marshes 黄河口盐沼不同生态系统底栖微真核生物群落特征

IF 2.6 3区地球科学 Q1 MARINE & FRESHWATER BIOLOGY

Estuarine Coastal and Shelf Science

Pub Date : 2025-11-11 DOI: 10.1016/j.ecss.2025.109594

Jing Han , Lin Sun , Junrong Liang , Yahui Gao , Changping Chen

This study investigated benthic microeukaryotic communities in four intertidal salt marsh habitats (Phragmites australis, Suaeda salsa, Tamarix chinensis, and unvegetated mudflat) in the Yellow River Estuary during summer and winter. High-throughput sequencing of the 18S rRNA gene was employed to profile the communities, with a specific focus on the role of microalgae in sediment carbon sequestration. The results showed that benthic microeukaryotic communities were significantly influenced by seasons, habitats, and various environmental factors. Overall biodiversity was higher in winter, whereas the α-diversity index in summer exhibited a significant positive correlation with sediment carbon and nitrogen contents (p < 0.01). The results also suggested that biodiversity might be negatively correlated with sediment particle size to some extent. Notably, the Phragmites australis habitat exhibited distinct species richness and community composition relative to the other three habitats. Sediment carbon and nitrogen contents displayed distinct seasonal variations, with significantly higher concentrations in summer than in winter (p < 0.05). Furthermore, microalgae (e.g., Bacillariophyta and Chlorophyta) were important components of the benthic microeukaryotic community and were suggested to be key contributors to sediment organic matter. Based on these findings, we suggest that increased microalgal abundance may not only enhance interactions among community members but also facilitate the accumulation of organic carbon and nitrogen in intertidal sediments.

研究了黄河口4种潮间带盐沼生境（芦苇、沙豆沙、柽柳和无植被泥滩）夏冬季节底栖微真核生物群落。利用18S rRNA基因的高通量测序对微藻群落进行了分析，重点研究了微藻在沉积物固碳中的作用。结果表明，底栖微真核生物群落受季节、生境和各种环境因子的影响显著。冬季总体生物多样性较高，夏季α-多样性指数与沉积物碳氮含量呈极显著正相关（p < 0.01）。结果还表明，生物多样性与沉积物粒度可能存在一定的负相关关系。值得注意的是，芦苇生境的物种丰富度和群落组成明显高于其他3种生境。沉积物碳氮含量表现出明显的季节变化，夏季显著高于冬季（p < 0.05）。微藻（硅藻和绿藻）是底栖微真核生物群落的重要组成部分，是沉积物有机质的重要贡献者。基于这些发现，我们认为微藻丰度的增加不仅可以增强群落成员之间的相互作用，还可以促进潮间带沉积物中有机碳和氮的积累。

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引用次数: 0

Linking the trophodynamics of the ghost crab Ocypode quadrata (Fabricius, 1787) to natural habitat modification on sandy beaches 鬼蟹（fabicius, 1787）滋养动力学与沙地自然生境改造的关系

IF 2.6 3区地球科学 Q1 MARINE & FRESHWATER BIOLOGY

Estuarine Coastal and Shelf Science

Pub Date : 2025-11-10 DOI: 10.1016/j.ecss.2025.109608

Ligia Salgado Bechara , Rafael Duarte Monteiro , Gustavo Mattos , Arthur Bauer , Pedro Vianna Gatts , Maurício Mussi Molisani , Luciano Gomes Fischer , Carlos Eduardo Rezende , Yasmina Esmaeili , Patrícia Luciano Mancini , Carlos Alberto Barboza

The ghost crab species Ocypode quadrata is a key crustacean inhabitant of sandy beaches along the Western Atlantic coast, playing a crucial role in beach food webs. In this study, we describe and compare the trophic ecology of O. quadrata on beaches with varying levels of urbanization in Rio de Janeiro, Brazil. We utilized a combination of stomach content analysis (frequency of occurrence, FO%) and stable isotope analysis of δ¹⁵N and δ¹³C (isotopic niche and mixing models) in O. quadrata and their primary prey sources. Our results indicated that both marine and terrestrial sources play key roles in the trophic ecology of the ghost crab Ocypode quadrata, highlighting its function in energy transfer across coastal ecosystems. Although no differences were found in assimilated food proportions between urbanized and non-urbanized beaches, broader isotopic niches on less urbanized areas suggest that natural habitat modification may constrain the species’ trophic niche. Isotopic niche breadths indicated similar dietary patterns and habitat use across beaches, though individuals from low urbanized areas exhibited broader niches, suggesting greater resource diversity use. We observed high isotopic niche overlap (>50 %), with a nested pattern where the low urbanized sector encompassed the dietary niches of urbanized ones. Conversely, mixing models highlighted a greater assimilation of Emerita brasiliensis across all beaches, emphasizing a preference for high-calorie food sources when available. Higher δ¹³C values further supported an association with marine-derived resources. The trophic ecology of O. quadrata offers valuable insights into the connectivity between biological complexes and adjacent ecosystems, contributing to a landscape approach.

鬼蟹是西大西洋海岸沙滩上的一种重要的甲壳类动物，在海滩食物网中起着至关重要的作用。在这项研究中，我们描述并比较了巴西巴西里约热内卢不同城市化水平的海滩上的O. quadrata的营养生态。采用胃内容物分析（出现频率，FO%）和δ15N和δ13C稳定同位素分析（同位素生态位和混合模型）相结合的方法，分析了方腹圆齿圆齿及其主要猎物来源的δ15N和δ13C。我们的研究结果表明，海洋和陆地源在鬼蟹的营养生态学中都起着关键作用，突出了其在沿海生态系统中能量转移的功能。虽然城市化海滩和非城市化海滩在同化食物比例上没有发现差异，但在城市化程度较低的地区，更广泛的同位素生态位表明，自然栖息地的改变可能限制了物种的营养生态位。同位素生态位宽度表明不同海滩的饮食模式和栖息地利用相似，尽管低城市化地区的个体表现出更广泛的生态位，表明更大的资源多样性利用。我们观察到高同位素生态位重叠（> 50%），具有嵌套模式，即低城市化部门包含城市化部门的饮食生态位。相反，混合模型强调了在所有海滩上对巴西Emerita brasiliensis的更大同化，强调了它们对高热量食物来源的偏好。较高的δ13C值进一步支持了与海源资源的关联。方形草的营养生态学为研究生物复合体和邻近生态系统之间的连通性提供了有价值的见解，有助于景观研究。

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引用次数: 0

Invasive species management: The role of recreational fishing in managing Callinectes sapidus in the Balearic Islands, Spain 入侵物种管理：休闲捕鱼在西班牙巴利阿里群岛管理糙皮虫中的作用

IF 2.6 3区地球科学 Q1 MARINE & FRESHWATER BIOLOGY

Estuarine Coastal and Shelf Science

Pub Date : 2025-11-10 DOI: 10.1016/j.ecss.2025.109610

Esperança Perelló , Joan Terrassa , Antoni Sureda , Samuel Pinya , Montserrat Compa

The following study evaluates a pilot recreational fishing program implemented in Mallorca (Balearic Islands, Spain) to manage the invasive Atlantic blue crab (Callinectes sapidus) in coastal ecosystems. Between 2020 and 2024, recreational fishers were authorised to harvest blue crabs in eleven selected coastal zones. In this study, we present a detailed analysis of the self-reported data from those fishers, which revealed strong spatial and temporal variability in catch, with an increase in total captures and catch efficiency over time. Some zones consistently yielded high returns, while others showed persistently low or null catches. Moreover, the statistical analysis confirmed that both the number of fishers and zone selection significantly influenced capture outcomes. Overall, the pilot program demonstrates that recreational control can engage citizens and achieve measurable removals, especially in high-yield areas, with over 15,000 captures during the five-year period. Despite the high number of captures, the self-reported nature of the data and the limitation of parallel ecological sampling data prevent the estimation of the net demographic impact; to assess it, future cycles should integrate independent, zone-specific abundance surveys. Lessons learned from this experience may be used to inform future participatory strategies for managing invasive species in coastal ecosystems, especially in the case of the Atlantic blue crab in the Mediterranean Sea.

下面的研究评估了在马略卡岛（西班牙巴利阿里群岛）实施的一项试点休闲钓鱼计划，该计划旨在管理沿海生态系统中入侵的大西洋蓝蟹（Callinectes sapidus）。在2020年至2024年期间，休闲渔民被授权在11个选定的沿海地区捕捞蓝蟹。在这项研究中，我们对这些渔民自我报告的数据进行了详细的分析，结果表明，随着时间的推移，总捕获量和捕捞效率都在增加，捕获量在时空上具有很强的变异性。有些地区的渔获量一直很高，而另一些地区的渔获量一直很低，甚至为零。此外，统计分析证实，渔民数量和区域选择对捕获结果有显著影响。总体而言，该试点项目表明，休闲控制可以吸引市民参与，并实现可衡量的清除，特别是在高产地区，在五年内捕获了15,000多只。尽管捕获的数量很多，但数据的自我报告性质和平行生态抽样数据的局限性阻碍了对人口净影响的估计；为了评估它，未来的周期应该整合独立的、特定区域的丰度调查。从这一经验中吸取的教训可用于为未来管理沿海生态系统中入侵物种的参与性战略提供信息，特别是在地中海的大西洋蓝蟹的情况下。

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引用次数: 0

Tidal phase mediates sandy beach prey resource use by a surf zone fish, Amphistichus argenteus 潮汐相位调节了冲浪带鱼类对沙滩猎物资源的利用

IF 2.6 3区地球科学 Q1 MARINE & FRESHWATER BIOLOGY

Estuarine Coastal and Shelf Science

Pub Date : 2025-11-10 DOI: 10.1016/j.ecss.2025.109609

Jessica R. Madden, Kyle A. Emery, David M. Hubbard, Jenifer E. Dugan

Cross-ecosystem exchanges fuel highly productive intertidal macroinvertebrate communities that are prey for birds and fish on open coast sandy beaches. Coastal food webs can respond to physical dynamics of beaches, but specific processes connecting macroinvertebrate prey to surf zone fish are largely unknown. To evaluate tides as a potential mechanism moderating availability of beach prey to fish, we investigated the diet of an abundant surf zone fish, barred surfperch (Amphistichus argenteus), across semi-lunar tidal phases (spring vs. neap). During spring tides, greater beach inundation resulted in a 45 % expansion of intertidal habitat. Surfperch diet differed in response to tidal phase: during spring tides, diets were 35 % more diverse, reliance on a swash zone crab (Emerita analoga) declined, and the relative importance of beach invertebrate prey from additional intertidal zones increased. Tidal phase strongly influenced abundance-based diet composition in juveniles and biomass-based diet composition in adults, with adults consuming nearly twice the overall biomass of prey (+74 %) during spring tides compared to neap tides. Adult surfperch mainly consumed beach invertebrates (>89 % diet abundance, 97 % diet biomass) including hippid crabs and intertidal clams. Juveniles relied on invertebrate prey from both beach (28 % diet abundance, 92 % diet biomass) and shallow subtidal (72 % diet abundance, 8 % diet biomass) habitats. Our results indicate that greater inundation of beach intertidal zones by spring tides increased the diversity, abundance, and biomass of beach prey available to surf zone fish, highlighting tidal dynamics as a mechanism enhancing cross-ecosystem connectivity between open coast sandy beaches and associated surf zones.

跨生态系统的交换促进了高产的潮间带大型无脊椎动物群落，这些群落是开阔海岸沙滩上鸟类和鱼类的猎物。沿海食物网可以对海滩的物理动态做出反应，但连接大型无脊椎动物猎物和冲浪区鱼类的具体过程在很大程度上是未知的。为了评估潮汐作为调节海滩鱼类猎物可用性的潜在机制，我们研究了一种丰富的冲浪区鱼类，斑鲈（Amphistichus argenteus），在半月潮汐阶段（春季与小潮）的饮食。在春潮期间，更大的海滩淹没导致潮间带栖息地扩大了45%。鲈鱼的饮食对潮汐阶段的反应不同：在春潮期间，饮食的多样性增加了35%，对冲刷带蟹（Emerita analoga）的依赖减少，来自其他潮间带的海滩无脊椎动物猎物的相对重要性增加。潮汐阶段强烈影响幼鱼以丰度为基础的饮食组成和成鱼以生物量为基础的饮食组成，与小潮相比，春潮期间成鱼消耗的猎物总生物量几乎是其两倍（+ 74%）。成年鲈鱼主要以滩栖无脊椎动物为食（89%的食性丰度，97%的食性生物量），包括蟹和潮间带蛤。幼鱼依赖于来自海滩（28%的食物丰度，92%的食物生物量）和浅海下（72%的食物丰度，8%的食物生物量）栖息地的无脊椎动物猎物。研究结果表明，春潮对海滩潮间带的更大淹没增加了冲浪带鱼类可利用的海滩猎物的多样性、丰度和生物量，表明潮汐动力学是增强开放海岸沙滩和相关冲浪带之间跨生态系统连通性的机制。

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引用次数: 0

Coastal trapped waves in the South China Sea associated with strong El Niño-Southern Oscillation 与强El Niño-Southern涛动有关的南海沿海困波

IF 2.6 3区地球科学 Q1 MARINE & FRESHWATER BIOLOGY

Estuarine Coastal and Shelf Science

Pub Date : 2025-11-07 DOI: 10.1016/j.ecss.2025.109607

Suan Hu , Guang Zhang , Yineng Li , Pengpeng Hu , Heng Zhang , Xiuquan Zhu , Jieshuo Xie , Wenping Gong

Coastal trapped waves (CTWs) are sub-inertial waves that play a critical role in coastal dynamic processes and can propagate over vast distances. This study investigates the changes in sub-seasonal to seasonal (S2S) CTWs (with periods >30 days) and synoptic scale CTWs (with periods <30 days) in the South China Sea during strong El Niño-Southern Oscillation (ENSO) events. The analysis of the Hong Kong tide gauge data reveals that during the strong La Niña events, the intensity of S2S CTWs significantly increases, while the synoptic scale CTWs are enhanced during the strong El Niño events. Spatiotemporal analyses reveal distinct differences in the characteristics of CTWs between the northern South China Sea shelf and the eastern Vietnam shelf. Specifically, on the northern South China Sea shelf, the CTWs are barotropic, whereas on the eastern Vietnam shelf, they tend to be baroclinic. Our results indicate that key factors such as winds, background circulation, stratification, and tropical cyclones significantly impact the temporal variability of CTWs. The influence of local winds is particularly crucial. On the eastern Vietnam shelf, the background circulation shows significant differences between strong La Niña and strong El Niño years, playing an important role in the dynamics of CTWs. This study enhances our understanding of CTW dynamics in the South China Sea, and the findings provide valuable insights for predicting and managing coastal hazards in the area.

海岸困波是一种亚惯性波，在海岸动力过程中起着至关重要的作用，可以传播很远的距离。本文研究了强El Niño-Southern涛动（ENSO）事件期间南海亚季节—季节（S2S） cttws（周期>；30）和天气尺度cttws（周期<；30）的变化。对香港验潮仪资料的分析表明，在强La Niña事件期间，S2S级CTWs强度显著增强，而在强El Niño事件期间，天气尺度CTWs强度增强。时空分析表明，南海北部和越南东部大陆架的ctw特征存在明显差异。具体来说，在南海北部大陆架上，ctw是正压的，而在越南东部大陆架上，ctw是斜压的。结果表明，风、背景环流、分层和热带气旋等关键因素对ctw的时间变化有显著影响。当地风的影响尤为重要。在越南东部陆架，背景环流在强La Niña年和强El Niño年之间表现出显著差异，在ctw动力学中起着重要作用。本研究增强了我们对南海CTW动态的认识，研究结果为该地区沿海灾害的预测和管理提供了有价值的见解。

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引用次数: 0

Fourteen-year temporal and spatial trends in hydrographic and nutrient conditions in the Lesina Lagoon, Adriatic sea 亚得里亚海莱西纳泻湖14年水文和营养条件的时空变化趋势

IF 2.6 3区地球科学 Q1 MARINE & FRESHWATER BIOLOGY

Estuarine Coastal and Shelf Science

Pub Date : 2025-11-05 DOI: 10.1016/j.ecss.2025.109604

Pierluigi Penna , Stefano Guicciardi o Guizzardi , Camilla Baldan , Claudia Sacchetti , Tommaso Scirocco , Elisabet Schepisi Sanè , Anna Nora Tassetti , Nicola Ungaro , Marisa Florio , Antonietta Specchiulli

When developing a climate change scenario, it is essential to carefully consider its impacts on both marine ecosystems and transitional environments, such as coastal lagoons, with the aim to promote their conservation and sustainable management. This study analyzes temporal and spatial trends in the water physico-chemical properties and nutrient dynamics of the Lesina lagoon (south-western Adriatic coast, Italy), based on monthly (from April to September) monitoring data collected between 2010 and 2023. Linear regression and multivariate analyses (SIMPER and PCA) were used to assess variations and inter-variable correlations. Over the 14-year period, a significant temperature increase of 1.45 °C and a salinity rise of 16.95 PSU were observed. Nutrient trends included a marked increase in silicates (3.342 ± 0.011 μM/year, p<0.001) and significant decreases in ammonia (−0.168 ± 0.002 μM/year, p<0.001) and oxidized nitrogen (−1.42 ± 0.01 μM/year, p<0.001). Spatial analysis revealed that silicate concentrations were significantly higher in the western area, while oxidized nitrogen levels were consistently lower in the western area compared to the central-eastern region. It is important to emphasize that, since the data used in this study were collected exclusively during the April–September period, all findings apply specifically to the warmer part of the year – namely, the spring and summer seasons. Therefore, the observed trends may not fully represent conditions during the colder months.

在制定气候变化情景时，必须仔细考虑其对海洋生态系统和过渡环境（如沿海泻湖）的影响，以促进其养护和可持续管理。基于2010年至2023年4月至9月的月度监测数据，分析了意大利亚得里亚海西南部莱西纳泻湖（Lesina lagoon）水体理化性质和养分动态的时空变化趋势。线性回归和多变量分析（SIMPER和PCA）用于评估变异和变量间相关性。在14 a期间，温度显著升高1.45°C，盐度显著升高16.95 PSU。营养变化趋势包括硅酸盐显著增加（3.342±0.011 μM/年，p<0.001），氨显著减少（- 0.168±0.002 μM/年，p<0.001），氧化氮显著减少（- 1.42±0.01 μM/年，p<0.001）。空间分析表明，西部地区硅酸盐浓度显著高于中东部地区，而西部地区氧化氮水平始终低于中东部地区。必须强调的是，由于本研究中使用的数据完全是在4月至9月期间收集的，因此所有研究结果都专门适用于一年中较温暖的部分-即春季和夏季。因此，观测到的趋势可能不能完全代表较冷月份的情况。

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引用次数: 0

Soft-sediment surrogacy: acoustic remote sensing relates more strongly to marine sediment eDNA than to infauna 软沉积物替代：声学遥感与海洋沉积物eDNA的关系比与动物的关系更强

IF 2.6 3区地球科学 Q1 MARINE & FRESHWATER BIOLOGY

Estuarine Coastal and Shelf Science

Pub Date : 2025-11-04 DOI: 10.1016/j.ecss.2025.109592

Raphael F. Burkart-Radtke , Emma L. Johnston , Tim Ingleton , Charlotte Beloe , Sebastian Vadillo Gonzalez , Graeme F. Clark

Predicting sediment infaunal biodiversity at ecologically relevant scales remains a major challenge for marine biomonitoring due to the costly and time-intensive nature of direct point sampling. This study evaluates the potential of remotely sensed acoustic variables as surrogates for infaunal biodiversity by modelling abiotic-biotic relationships. Critically, it compares the performance of traditional morphological identification with genomic (eDNA metabarcoding) techniques as an advancement to biological data collection in this context. Sediment grab samples and co-located multibeam acoustic data were collected from Sydney Harbour, Australia, to model biodiversity patterns using both taxonomic approaches. Modelling of the morphological data showed limited relationships with acoustic variables across standard diversity metrics (species richness, Shannon diversity, total abundance), and models were highly driven by sediment grain size. In contrast, diversity metrics from eDNA data revealed more consistent correlations with acoustic variables, particularly, topographic position index, slope, and planar curvature. These findings demonstrate that eDNA methods can improve the detection of abiotic-biotic relationships, likely due to greater taxonomic resolution and sensitivity. The integration of genomic tools with remote sensing offers the potential for a scalable, cost-effective pathway for mapping and monitoring infaunal biodiversity in heterogeneous benthic sedimentary systems. This combined approach enhances our ability to detect ecological patterns and supports more effective environmental assessment and management in estuarine and coastal ecosystems.

由于直接点采样的成本高、耗时长，在生态相关尺度上预测沉积物和动物的生物多样性仍然是海洋生物监测的一个主要挑战。本研究通过模拟非生物-生物关系来评估遥感声学变量作为动物生物多样性替代品的潜力。关键的是，它比较了传统形态学鉴定与基因组（eDNA元条形码）技术的性能，作为在这种情况下生物数据收集的进步。从澳大利亚悉尼港收集沉积物样本和同位置的多波束声学数据，使用这两种分类方法来模拟生物多样性模式。形态学数据的建模显示，在标准多样性指标（物种丰富度、香农多样性、总丰度）中，声学变量与形态学数据的关系有限，模型高度受沉积物粒度驱动。相比之下，来自eDNA数据的多样性指标显示与声学变量，特别是地形位置指数、坡度和面曲率的相关性更为一致。这些发现表明，eDNA方法可以提高非生物-生物关系的检测，可能是由于更高的分类分辨率和灵敏度。基因组工具与遥感的结合为绘制和监测非均质底栖沉积系统中的动物生物多样性提供了一种可扩展的、具有成本效益的途径。这种综合方法提高了我们探测生态格局的能力，并支持对河口和沿海生态系统进行更有效的环境评估和管理。

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引用次数: 0