Estuarine Coastal and Shelf Science最新文献

{"title":"Determining the fine-scale movement of an estuarine fish through a tidal-exclusion barrier improves the understanding of mass fish mortality risk","authors":"Richelle Addicoat ,&nbsp;James R. Tweedley ,&nbsp;Tom Ryan ,&nbsp;Alan Cottingham ,&nbsp;David L. Morgan ,&nbsp;Kath Lynch ,&nbsp;Stephen J. Beatty","doi":"10.1016/j.ecss.2024.109085","DOIUrl":"10.1016/j.ecss.2024.109085","url":null,"abstract":"<div><div>Tidal-exclusion barriers have routinely been constructed within estuaries throughout the world to moderate the risk of flooding by marine incursions. These barriers have been shown to impact ecological connectivity, however, their impact on the movement patterns of obligate estuarine fishes is poorly understood. We aimed to determine the environmental drivers of movements through a fish passage gate within a tidal exclusion barrier by the temperate sparid Black Bream (<em>Acanthopagrus butcheri</em>), which occasionally suffers from large-scale mortality events that predominantly occur in the adjacent habitat upstream of the barrier. Fish were fitted with passive integrated transponder (PIT) tags and their fine-scale passage was recorded using a monitoring system that acted as a gate at either end of the barrier over 14 months. Hydrological and environmental predictor variables were included in generalised additive mixed models to determine the drivers of upstream and downstream passages through the gate on an hourly and daily basis. Successful upstream and downstream passages were associated with times of minimal flow velocity within the fish gate that occurred when water levels equalised on both sides of the barrier. Downstream passages were also associated with declines in dissolved oxygen concentrations upstream of the barrier; suggesting that fish were seeking to escape poor water quality. However, as passage opportunities to avoid unfavourable conditions were influenced by tides that equalised the water levels, periodic mass fish mortality events can occur upstream of the barrier. As climate change will increase saltwater incursion and storm-related flooding risks, there will be a greater need for tidal exclusion barriers in many regions. This study underscores the need to understand the movement patterns of fishes in estuaries to maintain the connectivity of populations.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"313 ","pages":"Article 109085"},"PeriodicalIF":2.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150729","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":"Artificial structures that help prevent beach erosion create a sandy beach environment that facilitates the burial of debris","authors":"Daiki Tomojiri ,&nbsp;Kosuke Takaya ,&nbsp;Yuya Otani ,&nbsp;Atsuki Shibata","doi":"10.1016/j.ecss.2024.109084","DOIUrl":"10.1016/j.ecss.2024.109084","url":null,"abstract":"<div><div>Vast amounts of marine debris continue to flow into the ocean every year, and there is concern about the negative economic, ecological, and aesthetic impacts of the debris. Coastal environments, including sandy beaches, accumulate debris stranded on the surface and buried in the beach substrate. In the Seto Inland Sea region of Japan, where the coast tends to erode, detached breakwaters have been installed as part of efforts to protect the coast, stop beach erosion, and promote sedimentation. Sandy beaches that form behind detached breakwaters tend to accumulate marine debris, and some debris that strands on the beach can become buried. The actual amount and distribution of debris buried on beaches and the mechanism responsible for its burial are unknown. Here, we show that there is considerable debris buried on beaches formed behind detached breakwaters. Much of that debris is buried in the berm after being trapped in the berm scarp and subsequently covered by windblown sand. Our findings demonstrate that detached breakwaters created for coastal protection have resulted in a coastal system that accumulates and buries much marine debris. Studies of the distribution, mechanism of burial, and dynamics of buried debris are still in the development stage, and little is known about the impact of buried debris on the environment and society. Efforts to address these knowledge gaps will be needed in the future.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"313 ","pages":"Article 109084"},"PeriodicalIF":2.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143151341","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":"History of recurrent short- and long-term coral bleaching events in Indian coral reefs: A systematic review of contrasting bleaching patterns, lessons learned, and future directions","authors":"Thangadurai Thinesh ,&nbsp;Kalyan De ,&nbsp;Murugesan Sobanaa ,&nbsp;P Sivagurunathan ,&nbsp;Peter Sahayariana ,&nbsp;Pasiyappazham Ramasamy ,&nbsp;Joseph Selvin ,&nbsp;Polpass Arul Jose ,&nbsp;Anthony J. Bellantuono","doi":"10.1016/j.ecss.2024.109112","DOIUrl":"10.1016/j.ecss.2024.109112","url":null,"abstract":"<div><div>Climate change has intensified coral bleaching events globally and caused widespread coral mortality; however, bleaching patterns and species susceptibility vary across locations and over time. Understanding these spatial and temporal patterns is vital to predicting the impacts of coral bleaching and guiding conservation efforts. Yet, data on Indian reefs remains limited and fragmented. In this study, we have analyzed 23 years of bleaching episodes on Indian coral reefs (four major reefs and other patch reefs) reported from 1998 to 2020 to understand the geographical footprint of bleaching patterns, species susceptibility differences, and their impact. We found that all four major Indian reef systems (the Gulf of Kachchh, the Gulf of Mannar, Lakshadweep, and the Andaman Islands) have experienced three major bleaching episodes (1998, 2010, and 2016) and multiple short-term bleaching events. Short-term bleaching events (degree heating weeks (DHWs &lt;4 weeks) created differences in species susceptibility, but the disparity among species diminished during long-term bleaching events (DHWs &gt;4 weeks) in all reef sites. <em>Acropora</em>, <em>Porites</em>, <em>Pocillopora</em>, <em>Montipora,</em> and <em>Turninaria</em> in the Gulf of Mannar, <em>Porites</em> and <em>Favia</em> in the Gulf of Kachchh, and <em>Acropora</em> in the Andaman Island and Lakshadweep were the most vulnerable genera during all the bleaching events. In terms of recovery, <em>Porites</em> and other massive forms recovered better than branching forms. We also found a negative correlation between bleaching percentages and DHWs in some reef sites. Furthermore, reported species susceptibility patterns to the 2016 long-term bleaching events in the Gulf of Mannar showed conflicting results among different studies, likely due to one-time surveys conducted during prolonged events. Such surveys overestimate bleaching in heat-tolerant species that persist bleached and miss mortality in sensitive species that die quickly. Although inconsistent data from different study sites hinder the development of robust predictive models, data collected over the past 23 years has been invaluable in revealing patterns of coral community susceptibility and the impacts of bleaching. Our findings underscore the need for repeated surveys to track winners and losers accurately during prolonged bleaching events and the need for systematic and standardized surveys to ensure consistent and comparable datasets for future research and conservation planning.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"313 ","pages":"Article 109112"},"PeriodicalIF":2.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143149770","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":"Influence of coastal uplift and subsidence on the mangrove-associated crab community in the Andaman Islands, India","authors":"Mayur Fulmali ,&nbsp;Anoop Raj Singh ,&nbsp;Nehru Prabakaran","doi":"10.1016/j.ecss.2025.109179","DOIUrl":"10.1016/j.ecss.2025.109179","url":null,"abstract":"<div><div>The 2004 Sumatra-Andaman earthquake caused vertical ground movements (uplift and subsidence), which had a profound negative impact on the mangrove ecosystem of the Andaman and Nicobar Islands. Studies post-catastrophe largely delved into estimating the severity of degradation through changes in coastal vegetation cover. However, the implications of coastal uplift (sea level drop-SLD), and coastal subsidence (sea level rise-SLR) on the mangrove crab community remain largely unexplored. Therefore, to understand the impact of SLD and SLR on the diversity and zonation patterns of the mangrove crab community, we surveyed nine mangrove sites across the Andaman Islands representing various uplift (n = 4), subsidence (n = 4) and no-change scenarios (n = 1). We observed 57 distinct crab species in the control site (n = 57) followed by subsided sites (n = 45–54) and uplift sites (n = 20–37). The crab zonation pattern varied between the subsided and uplift habitats, based on their spatial distribution within the intertidal zone. Both, the transgression (towards land) and progression (towards the sea) of the crab community were evident in SLR and SLD scenarios, respectively. The current study serves as an important baseline for the long-term monitoring of mangrove crabs, which would help better understand the ecological response of mangrove crabs to the change in sea levels.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"315 ","pages":"Article 109179"},"PeriodicalIF":2.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137961","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":"Caspian Sea fisheries under threat from marine heatwaves","authors":"Hasan Fazli ,&nbsp;Sudhanshu Kumar ,&nbsp;Ali Rezamand ,&nbsp;Gholamreza Daryanabard ,&nbsp;Simrandeep Kaur","doi":"10.1016/j.ecss.2024.109122","DOIUrl":"10.1016/j.ecss.2024.109122","url":null,"abstract":"<div><div>Exposure to extreme temperature events represents a critical challenge for landlocked marine ecosystems, which are highly susceptible to the adverse impacts associated with such phenomena. Marine heatwaves (MHWs), defined by periods of exceptionally high sea surface temperature (SST), have become increasingly prevalent and devastating under the influence of global warming, leading to significant degradation of marine biodiversity and ecosystem health. This study introduces the first comprehensive assessment of the occurrence of MHWs from 1982 to 2022 in the Caspian Sea (CS) and their impacts on fish communities. We identified 103 MHW events, including the most extended event lasting 64 days and the most intense event exceeding 4.45 °C above the climatological mean. Our results show a link of MHWs with water vapor (WV), rainfall (RF), river discharge (RD) and sea surface level (SSL). In 2018, the Shannon-Weiner index declined the most (−42.5%), relative condition factor (<em>K</em>_<em>n</em>) in <em>Rutilus kutum</em> (−14.7%), and <em>Acipenser stellatus</em> (−9.7%). The year 2022 witnessed pronounced declines in the catch per unit effort (CPUE) of <em>Clupeonella engrauliformis</em> (−97.3%) and <em>C. grimmi</em> (−97.0%), whereas <em>C. caspia</em> experienced a significant increase (1755.5%). Our findings showed that biological indices and CPUE of fish species change significantly after the warming event, resulting in a reduction in the abundance for the majority of these fish species.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"313 ","pages":"Article 109122"},"PeriodicalIF":2.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150301","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":"Efficient computation of wave transformation matrices to support coastal management","authors":"M.M. Carapuco ,&nbsp;R. Taborda","doi":"10.1016/j.ecss.2024.109090","DOIUrl":"10.1016/j.ecss.2024.109090","url":null,"abstract":"<div><div>Management-oriented tools aim to turn science-based data into helpful information directly useful to policy-makers and managers. Wave Transformation Matrices (WTM) can be regarded as management-oriented tools that allow computing reliable and timely information concerning the nearshore wave regime or the sea state. WTM revealed to very helpful in the visualization and understanding of the physical processes related with nearshore waves propagation. Results obtained allow to conclude that 1) basic 2D WTM have a very good performance in the characterization of nearshore wave regime providing accurate results in a simpler and faster manner; these matrices are also excellent visual tools to allow non specialist users to recognize dominant process in nearshore wave propagation, 2) 3D WTMH should be used in target-areas where wave breaking or where bottom friction leads to significant energy dissipation seaward of the simulation point, and 3) 2D WTMT should be used under circumstances where the wave period is likely to change, such as sheltered coastal stretches or areas with strong refraction. The findings herein presented show that WTM not only imply significantly smaller computational and interpretation effort and time, in comparison with a conventional wave-by-wave modeling strategy but are also very helpful in the visualization of the physical processes related with waves propagation. Future works should consider optimizing the potential of WTM by investing in the development of friendlier user-interfaces.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"313 ","pages":"Article 109090"},"PeriodicalIF":2.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150728","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":"Biodiversity and distribution of marine gastrotricha along the Pacific coast of Costa Rica","authors":"M. Antonio Todaro ,&nbsp;Matteo Dal Zotto ,&nbsp;Oscar A. Segura-Bermúdez ,&nbsp;Rebeca Cambronero-Bolaños ,&nbsp;José A. Vargas ,&nbsp;Jeffrey A. Sibaja-Cordero","doi":"10.1016/j.ecss.2024.109097","DOIUrl":"10.1016/j.ecss.2024.109097","url":null,"abstract":"<div><div>Gastrotricha is a minor but stimulating phylum of small-sized invertebrates that, in marine settings, appear particularly speciose in clean sandy sediments. However, not much is known about their biodiversity and ecology on the beaches of the Neotropical region. Therefore, this study aimed to determine the biodiversity of these small metazoans, their distribution on the Pacific Coast of Costa Rica, and their relationships with local environmental variables. We collected sediment samples from 27 sandy beaches and recorded various factors like granulometric characteristics, organic matter, carbonate content, water salinity, and GPS geographical data. We found a total of 50 species of Gastrotricha, most of which are likely new to science. Although the overall diversity was high, individual beaches had low numbers of species. The main environmental factors that produced the change in species identity between samples were sediment grain size and calcium carbonate content. The study found that species of the Order Chaetonotida were mainly present in the littoral zone, while those of the Order Macrodasyida were found in both the littoral and sublittoral zones. Additionally, Chaetonotida species showed a preference for finer sediments. We also observed a slight change in species composition from North to South along the coastline, which may be attributed to other environmental and regional differences that need further evaluation, like the upwelling effect, estuarine dynamics, and exposure to oceanic influence.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"313 ","pages":"Article 109097"},"PeriodicalIF":2.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143151335","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":"Species diversity within ecosystem diversity of wetlands within drylands: Waterbird ecological attributes in an ecological complex of wetland habitats","authors":"Adel Bezzalla ,&nbsp;Brahim Silabdi ,&nbsp;Noudjoud Mansour ,&nbsp;Nessrine Hellas ,&nbsp;Maataz Announe ,&nbsp;Cherine Marref ,&nbsp;Ahmed Abdennebi ,&nbsp;Haroun Chenchouni","doi":"10.1016/j.ecss.2024.109103","DOIUrl":"10.1016/j.ecss.2024.109103","url":null,"abstract":"<div><div>North Africa serves as a vital stopover for millions of migratory waterbirds along the Africa-Eurasia migration routes. During autumn and spring migrations, North African wetlands provide crucial refueling sites before birds cross the Sahara Desert or the Mediterranean Sea. In the northeastern region of Algeria, the wetlands in the Batna province hold significant importance due to their strategic location between the Tell Atlas and the Saharan Atlas ranges, shaping unique climate and habitat conditions for avifauna during migratory movements. Over fourteen years (2008–2021), waterbird counts conducted across 21 wetlands grouped into nine clusters of wetlands in this region revealed the presence of 68 species representing 16 families across 10 orders. Charadriiformes dominated with 32 species from five families, alongside Gruiformes and Pelecaniformes each represented by two families. Notably, 42 out of the 68 species potentially used these wetlands as wintering grounds. The study categorized bird species based on biogeographical affinity, with a notable dominance of the western Palaearctic. Among trophic categories, invertebrate consumers were the most prevalent, comprising 50% of recorded species. Furthermore, the protection status of each identified species was assessed at national and international levels, referencing Algerian legal texts, the IUCN Red List, and various international conventions. While 60 species were classified as \"least concern\" on the IUCN Red List, <em>Oxyura leucocephala</em> was categorized as \"endangered\", with <em>Marmaronetta angustirostris</em> and <em>Aythya ferina</em> listed as \"vulnerable\", and five species marked as \"near threatened\". The cluster of wetlands composed of Chott Gadaine and Chott of Oued El-Madher emerged as the most diverse, harboring 60 species, including numerous nationally and internationally protected species, due to its remote location from residential areas. As such, five wetland ecosystems are proposed as potential Ramsar and/or Important Bird and Biodiversity Areas (IBAs) sites: Ouled Mohamed Ben Amor Hill reservoir, Gadaine complex, Tagratine Hill reservoir, Koudiet Lamdaouer Dam, and Bousberka Hill reservoir. This study not only addressed primary threats and degradation factors impacting avifauna, particularly endangered species but also offered perspectives for conservation strategies. The insights gained are critical for the preservation of key species and sites of ornithological importance.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"313 ","pages":"Article 109103"},"PeriodicalIF":2.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143151344","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":"Identification of sulfur species in coastal marine sediments collected from the Seto Inland Sea, Japan in summer","authors":"Satoshi Asaoka ,&nbsp;Kazuhiko Takeda ,&nbsp;Misaki Katayama","doi":"10.1016/j.ecss.2025.109130","DOIUrl":"10.1016/j.ecss.2025.109130","url":null,"abstract":"<div><div>This study investigated the spatial distribution of hydrogen sulfide in sediment pore water and sulfur species in marine sediments of the Seto Inland Sea, the largest enclosed sea in Japan, using a combination of hydrogen sulfide detection tubes and X-ray absorption fine structure spectroscopy to identify sulfur species. The percentage composition of sulfur species in the surface sediments (0–5 cm layer) of the Seto Inland Sea was identified as sulfate (23.1–85.5%), thiosulfate (&lt;5–30.7%), elemental sulfur (&lt;5–31.0%), and pyrite (&lt;5–44.3%). Organic sulfur was identified at some sampling stations. The redox potential of the sediments was positively correlated with the percentage composition of the sum of sulfate and thiosulfate to total sulfur, and was negatively correlated with the percentage composition of the sum of elemental sulfur and pyrite to total sulfur. The percentage composition of sulfate was negatively correlated well with total organic carbon concentration in the sediments. The slope of the linear regression between the percent composition of sulfate and total organic carbon concentration in sediments for the high-load area was approximately two times higher than that of the low- and moderate-load areas. X-ray absorption near the edge structure of iron in the sediments showed that pyrite was oxidized to sulfate coupled with the reduction of iron. In conclusion, the redox potential and total organic carbon concentration in sediments could be simple parameters for estimating sulfur species in sediments from the Seto Inland Sea.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"313 ","pages":"Article 109130"},"PeriodicalIF":2.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143149741","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":"Crab bioturbation leads to more CO2 efflux in native than in invasive salt marshes","authors":"Yujie Hua ,&nbsp;Jianwu Tang ,&nbsp;Linjing Ren ,&nbsp;Faming Wang ,&nbsp;Huayu Chen ,&nbsp;Xiuzhen Li","doi":"10.1016/j.ecss.2024.109121","DOIUrl":"10.1016/j.ecss.2024.109121","url":null,"abstract":"<div><div>Coastal wetland ecosystems harbor diverse plant and macrobenthic species but are highly susceptible to invasion by non-native species. The combined impact of macrobenthic organisms and plant invasions on carbon cycling, however, remains insufficiently understood. This study investigated four herbivorous, burrowing crab species inhabiting Spartina alterniflora (SA) and Phragmites australis (PA)-dominated salt marshes in China and the USA to evaluate their influence on carbon fluxes under varying conditions of plant invasion. Key findings include the following: (1) In native S. alterniflora marshes, Sesarma crabs significantly reduced plant biomass through herbivory, whereas fiddler crabs in the USA and Chiromantes crabs in China displayed omnivorous feeding behaviors that contributed to maintaining ecological balance with vegetation. (2) Salt marshes dominated by Sesarma crabs exhibited signs of ecosystem degradation, characterized by elevated soil CO₂ fluxes compared to other S. alterniflora sites (5.083 ± 2.59, 3.761 ± 2.97, and 2.555 ± 1.63 μmol m⁻² s⁻¹ in die-off native, healthy native, and healthy invasive S. alterniflora sites, respectively; <em>P</em> &gt; 0.05). (3) Plant invasion emerged as a more significant driver of soil CO₂ flux than crab feeding behavior, with CO₂ emissions being 2.116 μmol m⁻² s⁻¹ higher in native habitats (<em>P</em> &lt; 0.05) and 1.675 μmol m⁻² s⁻¹ higher in sites dominated by herbivorous crabs (<em>P</em> &gt; 0.05). Additionally, the positive correlation between crab abundance and burrow density, along with the negative correlation between burrow density and root biomass, highlights the complex interactions shaping carbon dynamics. This study addresses a critical knowledge gap regarding the role of crab activity in influencing coastal wetland carbon emissions and provides valuable insights for quantifying and modeling CO₂ fluxes in these ecosystems.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"313 ","pages":"Article 109121"},"PeriodicalIF":2.6,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150302","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}