Estuarine Coastal and Shelf Science最新文献

{"title":"Larval dispersal dynamics of Maja squinado in the Northwestern Mediterranean: a biophysical modeling approach","authors":"C. Barrier ,&nbsp;T. Beneteau ,&nbsp;M.-C. Raffalli ,&nbsp;N. Barrier ,&nbsp;C. Lett ,&nbsp;V. Pasqualini ,&nbsp;E.D.H. Durieux","doi":"10.1016/j.ecss.2025.109183","DOIUrl":"10.1016/j.ecss.2025.109183","url":null,"abstract":"<div><div>The Mediterranean spinous spider crab, <em>Maja squinado</em> (Herbst, 1788), is a prized crustacean exploited by Mediterranean coastal fisheries, contributing to local economies and culinary traditions. While stock declines have been reported in some regions, other areas continue to sustain fishing activities, albeit under pressure. Understanding the species' demography is therefore essential for effective future management. To investigate the larval dispersal dynamics of <em>M. squinado</em> in the Mediterranean, a biophysical model was developed, incorporating biological and ecological data such as larval duration and spawning habitats. The tool Ichthyop, designed to study ichthyoplankton dynamics, was employed to perform simulations spanning the period from 2010 to 2020. These simulations were analyzed in the context of global surface water warming trends, yielding maps that illustrated trajectory density, system connectivity, and variations in larval density and dispersal distance over time. The comparative analysis of various scenarios revealed the significant impact of environmental variations on larval connectivity. Specifically, the Tunisia-Sardinia-Corsica complex exhibited strong connectivity, while the Balearic Islands appeared isolated due to the species’ short pelagic larval duration (PLD). The findings highlight the utility of biophysical models in hypothesizing population declines in isolated areas and underscore the necessity of employing diverse modeling approaches at multiple spatial and temporal resolutions. Kernel density estimation (KDE) maps were selected to analyze and visualize the observed simulation scenarios. The results emphasize the importance of considering these changes, particularly the synergies between environmental and biological parameters that influence larval dispersal and connectivity in this species. Such approaches could enhance future conservation and management strategies by accounting for the complex interactions driving population dynamics within the context of a changing Mediterranean ecosystem.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"316 ","pages":"Article 109183"},"PeriodicalIF":2.6,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143387777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Small-scale spatial pattern of the trophic structure of polychaetes from coral reefs: Implications of future sea level rise","authors":"Caroline C.C. Clemente ,&nbsp;Karla Paresque ,&nbsp;Cinthya S.G. Santos ,&nbsp;Paulo J.P. Santos","doi":"10.1016/j.ecss.2025.109162","DOIUrl":"10.1016/j.ecss.2025.109162","url":null,"abstract":"<div><div>The functional ecology of macrobenthic communities, particularly their trophic structure, is crucial for understanding ecosystem response to disturbances. The present study provides the first characterization of the small-scale spatial distribution patterns of polychaete feeding guilds in the midlittoral and shallow infralittoral of a tropical coral reef. The aim of this study was to analyze the small-scale vertical distribution of polychaete feeding guilds at the interface between the midlittoral and shallow infralittoral of a reef environment, using artificial substrate units (ASUs). Our results indicated that the most dominant polychaete group was SR-He-mic (herbivore feeding on surface benthic microbiota), followed by SR-De (feeding on surface deposits). The distribution of guilds was influenced by tidal height, with trophic group richness increasing from the midlittoral to the infralittoral. However, the distribution of organisms in the trophic groups was more equitable in the midlittoral zone, without the strong dominance of a single group. In contrast, tidal heights −0.3 m and −0.4 m were dominated by SR-De (feeding on surface deposits), showing slightly lower diversities although with high variation in values. Thus, trophic structure is expected to change significantly in the event of “drowning” (total or partial) of the reef ecosystem, with rising sea levels increasing the dependence of the ecosystem on deposited organic matter. This study highlights that the vertical zonation of the trophic structure of polychaetes plays a critical role in determining the vulnerability of the coral reef ecosystem to climate change, emphasizing the necessity and importance of mitigation actions to prevent significant changes in this ecosystem.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"316 ","pages":"Article 109162"},"PeriodicalIF":2.6,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143387779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The role of the hydroid Eudendrium racemosum (Cavolini, 1785) (Cnidaria: Hydrozoa) as basibiont for exotic species in marinas","authors":"J.M. Guerra-García ,&nbsp;C. Navarro-Barranco ,&nbsp;M. Vázquez-Luis ,&nbsp;J. Moreira ,&nbsp;M. César ,&nbsp;M.E. Márquez ,&nbsp;P. Saenz-Arias ,&nbsp;M. Ros","doi":"10.1016/j.ecss.2025.109180","DOIUrl":"10.1016/j.ecss.2025.109180","url":null,"abstract":"<div><div>Effective management of non-indigenous species (NIS) in marinas requires accurate knowledge of their biodiversity. A temporal study of macrofaunal assemblages associated to the native arborescent hydroid <em>Eudendrium racemosum</em> was conducted in two marinas with intense maritime traffic on the Spanish Atlantic and Mediterranean coasts. While only 7 (all peracarid crustaceans) of the 52 species were NIS, they frequently dominated macrofaunal assemblages in abundance. Factors affecting these assemblages were primarily hydroid density and water turbidity, and secondarily water salinity and temperature. The relative contribution of NIS to the community, both in number of species and abundance, was significantly higher in Palma (Mediterranean) than in Cádiz (Atlantic) during the entire year. The structure of the total and NIS community also differed between marinas, highlighting the local singularity of these human-made environments. Despite the lack of basibiont specificity of most exotic epibionts, <em>E. racemosum</em> seems to facilitate the proliferation of the exotic amphipod <em>Paracaprella pusilla</em> compared with other hosts, probably due to mutualistic relationships.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"315 ","pages":"Article 109180"},"PeriodicalIF":2.6,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143378398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Functional analysis of benthic macrofauna in mangroves of the tropical Eastern Pacific (Colombian Pacific coast)","authors":"Sierra-Luna V. Alejandra ,&nbsp;Vásquez-Salazar David F ,&nbsp;López de Mesa-Agudelo Luz A ,&nbsp;Ocampo-Rojas M. Alejandra ,&nbsp;Guzmán-Alvis Angela I ,&nbsp;Cantera-Kintz Jaime R","doi":"10.1016/j.ecss.2025.109181","DOIUrl":"10.1016/j.ecss.2025.109181","url":null,"abstract":"<div><div>Mangroves are essential ecosystems that support marine biodiversity and sustain fisheries; however, they are increasingly threatened by anthropogenic pressures. This study demonstrates that human impacts significantly reduce the functional redundancy of benthic macrofauna in mangroves, thereby increasing their vulnerability to disturbances such as climate change and physical alterations. A total of 102 morphospecies were identified across six localities in the Eastern Tropical Pacific along the Colombian Pacific coast, which were classified into 62 functional entities (FE). Functional richness (FRi), functional redundancy (FRe), and functional vulnerability (FVu) indices were calculated for each locality to assess the functional integrity of these ecosystems. These indices provide critical insights into the potential loss of functional diversity due to species loss and serve as valuable tools to evaluate the effects of anthropogenic disturbances on ecosystem functionality. The results revealed that all localities exhibited an average FRe &lt;2, indicating that most FE were composed of a single species. This lack of redundancy implies a heightened vulnerability of mangrove ecosystems to shifts in functional dynamics in response to natural disturbances such as changes in precipitation, climate variability, and physical alterations. These findings emphasize the importance of functional diversity as a key determinant of ecosystem stability and highlight the urgent need for conservation and restoration strategies that prioritize the maintenance of functional integrity. This approach is critical for ensuring the long-term sustainability of mangrove ecosystems in the face of ongoing environmental change.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"316 ","pages":"Article 109181"},"PeriodicalIF":2.6,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143387888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of seasonality on the toxicity and metals bioavailability after the resuspension of sediments from a tropical estuary","authors":"Christiane do Nascimento Monte ,&nbsp;Ana Paula de Castro Rodrigues ,&nbsp;Bruno Galvão de Campos ,&nbsp;Lucas Buruaem Moreira ,&nbsp;Beatriz Grebbe ,&nbsp;Guacira de Figueiredo Eufrasio Pauly ,&nbsp;Ana Carolina Feitosa Cruz ,&nbsp;Lílian Irene Dias da Silva ,&nbsp;Renato Campello Cordeiro ,&nbsp;Denis Moledo de Souza Abessa ,&nbsp;Wilson Machado","doi":"10.1016/j.ecss.2025.109167","DOIUrl":"10.1016/j.ecss.2025.109167","url":null,"abstract":"<div><div>The resuspension of polluted sediments often transfers contaminants to the water column, but the potential alterations in deposited bottom sediments remain overlooked. Guanabara Bay (GB) is a tropical estuary highly polluted by multiple sources and contaminants. This study aimed to assess possible changes of toxicity and metal pollutant retention capacity of GB sediments after resuspension, at 1h and 24h after resuspension. Sediments were collected from the Niterói Harbor (NH), Meriti River (MR), Iguaçu River (IR), Rio de Janeiro Harbor (RJH), and Guapimirim Protection Area (Guapi) in winter and summer. Whole sediment toxicity on the fecundity of <em>Nitokra</em> sp. was lower in the Guapi, while IR and RJH were the most toxic. Effects on the sediment-water interface were assessed by embryo-larval development of <em>Echinometra lucunter</em>, with higher toxicity occurring in samples from MR and RJH after resuspension, showing that resuspension increases toxicity. Resuspension increased toxicity in the sediment and water, demonstrating the paramount importance of performing ecotoxicological characterization in different periods. Furthermore, proper management of dredged materials will benefit from predictions of toxicity changes related to seasonal variability.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"315 ","pages":"Article 109167"},"PeriodicalIF":2.6,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143226650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multiscale analysis of zooarchaeological data to reconstruct past kelp forest productivity for the Northern Channel Islands, California U.S.A.","authors":"Jeremy D. McFarland ,&nbsp;Amira F. Ainis ,&nbsp;Christopher S. Jazwa","doi":"10.1016/j.ecss.2025.109178","DOIUrl":"10.1016/j.ecss.2025.109178","url":null,"abstract":"<div><div>As primary consumers, sea urchin populations provide key insights into the health of kelp-forest ecosystems along the Pacific Coast of North America. When their populations are uncontrolled by predation, intensive sea urchin grazing can deplete kelp forest habitats, affecting the productivity of marine organisms that rely on kelp for food and shelter. Using a multiscale approach, we analyze zooarchaeological assemblages at regional, island-wide, and localized scales from trans-Holocene records on two of California's Northern Channel Islands: Santa Rosa and San Miguel. We develop and present palaeoecological indices that indicate the relative proportion of sea urchins in archaeological assemblages increased after ∼4200 cal BP, contemporaneously with a decrease in red abalone and other kelp-dependent mollusks. The result of this study suggests that climatic variability with increased sea surface temperature anomalies (Δ 1 °C) caused a tipping point in nearshore marine ecosystems resulting in greater urchin proliferation events, subsequently decreasing the overall productivity of shellfish species associated with kelp forest ecosystems but occurring at different regional and temporal scales on and between islands. We suggest that Indigenous Islanders adapted to these changes by shifting foraging strategies and using unique harvesting-enhancement strategies involving stewardship of nearshore habitats by more intensively harvesting sea urchins from the intertidal during proliferation events. The results of this study apply to modern restoration efforts in kelp forest ecosystems around the Northern Channel Islands by providing long-term historical baselines for identifying areas that have been more resilient or vulnerable to climatic changes over thousands of years.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"316 ","pages":"Article 109178"},"PeriodicalIF":2.6,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143395606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparisons between tropical and temperate estuarine ichthyofaunas of western Africa and eastern South America","authors":"Alan K. Whitfield ,&nbsp;Mario Barletta ,&nbsp;Trevor D. Harrison","doi":"10.1016/j.ecss.2024.109088","DOIUrl":"10.1016/j.ecss.2024.109088","url":null,"abstract":"<div><div>This review examines the probable fish colonization processes that occurred when plate tectonics and continental drift created the South Atlantic Ocean between Africa and South America, beginning in the Late Jurassic and gaining considerable momentum during the Cretaceous. Initial fish colonization is likely to have occurred by tropical fish families utilizing the western Tethys Sea arm around North Africa to gain access to the growing epicontinental seaways and coastal zones between Africa and South America. Speciation by some of these taxa would then have occurred such that the southern temperate waters on both continents became occupied by a less species rich cool-water ichthyofauna. The current numerical family status for African and South American tropical estuarine ecoregions is 55 and 63 respectively, whereas the numerical status for temperate ecoregions is 32 and 36 respectively. A Bray-Curtis similarity matrix was created for both fish families and species from the selected tropical and temperate ecoregions. These cluster analyses showed that fish families on either side of the Atlantic were similar but that the species were not. Only a very limited number of mainly large teleosts (e.g. <em>Megalops atlanticus</em>) and elasmobranchs (e.g. <em>Carcharinus leucas</em>) occur on both sides of the Atlantic. The current large crossing distances of &gt;3000 km for most tropical coastlines, and &gt;6000 km for some of the temperate coastlines, restrict fish species transfers across this large oceanic basin.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"313 ","pages":"Article 109088"},"PeriodicalIF":2.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143149768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sediment to atmosphere CO2 efflux increases at retreating salt marsh edges","authors":"Lea M. Stolpmann ,&nbsp;Thorsten Balke ,&nbsp;Adrian M. Bass","doi":"10.1016/j.ecss.2025.109129","DOIUrl":"10.1016/j.ecss.2025.109129","url":null,"abstract":"<div><div>Coastal intertidal wetlands are dynamic and biodiverse habitats with carbon-rich waterlogged soils. When the soil gets exposed to oxygen, carbon can be emitted as CO₂ back into the atmosphere. In this study we investigate whether contrasting stepped vs. gradual marsh edge topography, resulting from lateral cliff erosion versus expansion influences the soil-atmosphere CO₂ fluxes. CO₂ fluxes were quantified alongside groundwater level, soil temperature, and local sediment grain size across an estuarine salt marsh with differing seaward edge topography. We found that the CO₂ flux from the marsh soil was on average greater at cliffed-eroding compared to sloped-prograding sites, 1.11 ± 0.77 g/m² hr⁻¹ and 0.88 ± 0.74 g/m² hr⁻¹, respectively. The presented CO₂ emissions from the soil to the atmosphere consider the static morphology, i.e., the fluxes from the soil as it sits in place during the respective measurement. Soil respiration varied temporally with tidal cycle, groundwater levels, soil temperature, and spatially with distance to the seaward vegetation edge. Overall, fluxes during a neap cycle were significantly larger compared to spring tidal cycles. Our study thus highlights that soil CO₂ efflux is affected by marsh topography resulting from cliff formation and marsh edge undercutting. The eroding and prograding sites differed in their site characteristics related to groundwater level, grain size and soil temperature, influencing the soil to atmosphere CO₂ flux from the remaining marsh platform. Our findings highlight the spatial and temporal variability of carbon fluxes in a salt marsh environment and the importance of geomorphic form and process in understanding coastal carbon dynamics.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"313 ","pages":"Article 109129"},"PeriodicalIF":2.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Predicting predator abundance from prey in estuaries: Insights from single and joint species distribution modeling","authors":"Sally Dowd ,&nbsp;Sarah M. Roberts ,&nbsp;Nathan M. Bacheler ,&nbsp;Janet A. Nye","doi":"10.1016/j.ecss.2024.109083","DOIUrl":"10.1016/j.ecss.2024.109083","url":null,"abstract":"<div><div>Species occurrence and abundance is determined by both abiotic and biotic factors. Yet, species distribution models (SDMs) that rely on species-environment responses to form inferences about and predictions for species of interest, often ignore the effect of prey on predator distribution. There has been recent effort to consider these effects and advance SDMs particularly through the use of spatiotemporal models. However, these models have not been tested extensively in estuarine systems. We used fisheries-independent data to understand if prey abundance helps explain red drum, southern kingfish and black drum abundance in addition to the environment in a North Carolina estuarine system. We modeled these predators of blue crabs due to the decline in blue crab populations in North Carolina, once constituting the most lucrative fishery in the state. The distribution of all three predators was best explained by abiotic variables alongside either blue crab or total prey abundance. We tested the ability of two modeling approaches, single SDMs and joint SDMs, to make inferences and predictions of predator distribution. By comparing modeling types with different combinations of abiotic variables, total prey abundance, and blue crab abundance, we found consistency in the best fit model across modeling approaches for two of the three predators. Single SDMs often outperformed joint SDMs when predicting abundance. As our joint SDM approach leveraged conditional prediction, we asked if an increase in spatial resolution and prey information improved predictive performance. Although there was a slight improvement as more observations were included, joint models still provided weak predictions. With the advance of novel modeling techniques, we must consider tradeoffs between model choice, covariate selection, spatial scale, and data types.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"313 ","pages":"Article 109083"},"PeriodicalIF":2.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143151157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unique characteristics and spatiotemporal variations of dissolved organic matter along the Yeongsan River estuary impacted by an estuary dam","authors":"Meilian Chen ,&nbsp;Suhyeon Jang ,&nbsp;Kyung-Hoon Shin ,&nbsp;Haeseong Oh ,&nbsp;Min-Seob Kim ,&nbsp;Jin Hur","doi":"10.1016/j.ecss.2024.109081","DOIUrl":"10.1016/j.ecss.2024.109081","url":null,"abstract":"<div><div>Artificial barriers such as dams and weirs profoundly affect the hydrological conditions of aquatic ecosystems and organic carbon dynamics. This study examines the sources, characteristics, and spatial and seasonal variations in dissolved organic matter (DOM) in the Yeongsan River estuary, South Korea, impacted by an estuary dam. We explore how these barriers influence DOM concentrations and compositions seasonally. Observations from five sites (YR1 to YR5) revealed high levels of fluorescence index (FI, 1.7–1.9), biopolymer fraction (2–16%), and percentage of dissolved organic sulfur (DOS%, up to 42%), indicating a dominant algal contribution. The dam's installation disrupted the DOM continuum, distinguishing between upstream sites with terrestrial DOM and downstream sites influenced by marine sources. Compared to downstream sites, upstream sites consistently showed higher dissolved organic carbon (DOC) and absorption at 254 nm (a₂₅₄), with depleted δ¹³C-DOC across all seasons. Seasonal differences included higher concentrations of humic substances and biopolymers in upstream sites during spring, with pronounced protein-like fluorescence. During the monsoon, these sites had enhanced humic substances, biopolymers, low molecular weight neutrals, and peak N fluorescence associated with chlorophyll intensity. The dam controlled freshwater discharge to downstream sites, especially during peak monsoon. Stable isotopic values (δ¹³C-DOC) confirmed distinct DOM sources between upstream and downstream sites. Notably, only the middle site (YR3) displayed unique characteristics in the pre-monsoon season, indicating the monsoon's residual impact on DOM. The lower estuary likely experiences extended water residence times post-monsoon. This study underscores the significant influence of phytoplankton blooms and distinct spatiotemporal variations in DOM characteristics in an estuarine system disrupted by artificial barriers.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"313 ","pages":"Article 109081"},"PeriodicalIF":2.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143151232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}