Estuarine Coastal and Shelf Science最新文献

{"title":"Charting the uncharted: Broad-scale benthic habitat distribution in the Brazilian continental margin","authors":"Vitor de Souza ,&nbsp;Ibon Galparsoro ,&nbsp;Tiago B. Gandra ,&nbsp;Luis A. Conti ,&nbsp;Marinez E. Scherer ,&nbsp;Jarbas Bonetti","doi":"10.1016/j.ecss.2025.109203","DOIUrl":"10.1016/j.ecss.2025.109203","url":null,"abstract":"<div><div>Understanding the distribution of benthic habitats is of key relevance to inform management measures to protect this environment from ever growing human activities. Broad-scale habitat mapping has been developed under several initiatives around the world, mostly relying on the mapping environmental attributes that are vital to explain different benthic fauna composition. This approach usually depends on a habitat classification scheme that provides a common language and description of habitats. One of the most widely applied classification schemes is the European Union Nature Information System (EUNIS), which has been used under different broad-scale mapping projects. In this article, we applied the EUNIS approach to map the distribution of benthic habitats in the Brazilian margin, segmented on the three ecoregion provinces that occur within the country marine waters: North Brazil Shelf (NBS), Tropical Southwestern Atlantic (TSA) and Warm Temperate Southwestern Atlantic (WTSA). We compiled GIS layers of environmental parameters, including (i) bathymetry; (ii) substrate type; (iii) depth of euphotic zone; (iv) depth of wave base and; (v) geomorphic features. A map covering 5,800,000 km2 of the Brazilian margin was produced, most of which were classified as abyssal mud (34.03%). Shelf habitats were mainly classified as offshore circalittoral mud (2.75%), infralittoral sand (1.83%) and circalittoral mud (1.77%). Biogenic habitats are highly concentrated in the infralittoral zone (29,579 km2) compared to the area mapped in the circalittoral (415 km2) and offshore circalittoral (9840 km2). The results presented in this research are of major relevance for management purposes, especially for supporting the ongoing Marine Spatial Planning endeavor in Brazil. Understanding the broad distribution of benthic habitats is relevant for different information layers to be produced under this process, such as the identification of values for conservation, sensitivity to human pressures and provision of ecosystem services.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"317 ","pages":"Article 109203"},"PeriodicalIF":2.6,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471358","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":"Spatial and seasonal variability of CO2 flux and carbonate chemistry in a subtropical estuary","authors":"Larissa M. Dias ,&nbsp;Hui Liu ,&nbsp;Xinping Hu","doi":"10.1016/j.ecss.2025.109197","DOIUrl":"10.1016/j.ecss.2025.109197","url":null,"abstract":"<div><div>Quantifying the direction and magnitude of CO₂ flux in estuaries is necessary to better constrain the global carbon budget, yet carbonate systems and CO₂ flux in subtropical and urbanized estuaries are not well characterized. To estimate the CO₂ flux for Galveston Bay, a subtropical estuary located in the northwestern Gulf of Mexico proximal to the Houston-Galveston metroplex, monthly cruises were conducted along a transect extending from the Houston ship channel to the mouth of Galveston Bay and Gulf of Mexico from October 2017 to September 2018. Underway surface water partial pressure of CO₂ (<em>p</em>CO₂) measurements were conducted using a Shipboard Underway <em>p</em>CO₂ Environmental Recorder (SUPER-CO2) system. CO₂ flux was calculated for 0.025° × 0.025° latitude increments along the transect and total CO₂ flux for the Bay was estimated. On these cruises, discrete water samples were collected for laboratory analyses of total alkalinity (TA), total dissolved inorganic carbon (DIC), calcium (Ca²⁺), and pH (on the total scale, pH_T); and aragonite saturation state (Ω_Ar) was calculated using pH and DIC as well as measured Ca²⁺. Annual mean Bay water <em>p</em>CO₂ was 384.2 ± 56.7 μatm, TA was 2062.0 ± 213.2 μmol kg⁻¹, DIC was 1863.7 ± 160.9 μmol kg⁻¹, pH_T was 8.09 ± 0.17, and Ω_Ar was 2.43 ± 0.96. When compared to theoretical river-ocean mixing scenarios, TA values fell above the mixing line in winter and summer, indicating production, while DIC values displayed more spatial variability that included both production and consumption in different seasons. A large freshwater inflow event in spring was followed by a period of dilution (low salinity, TA, and DIC) and enhanced primary production (low water <em>p</em>CO₂ along with CO₂ uptake and high chlorophyll-<em>a</em> levels). CO₂ flux exhibited large seasonal and spatial variability, primarily due to seasonality in photosynthesis and variability of freshwater inflow events. Overall, Galveston Bay was a sink for CO₂ during the study period, with a mean air-sea CO₂ flux of −8.3 ± 17.3 mmol m⁻² d⁻¹, and carbonate chemistry in Galveston Bay was regulated by an interaction between hydrology and biogeochemistry. The carbonate chemistry and CO₂ uptake patterns of Galveston Bay differ from those that are common in temperate estuaries, which reiterates the need for further research in subtropical estuaries.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"316 ","pages":"Article 109197"},"PeriodicalIF":2.6,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419518","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":"Anthropic and natural variations effects on basin hydrodynamics and settling time in multi-inlet systems: Insights from Marano and Grado lagoon","authors":"Pascolo Sara,&nbsp;Petti Marco,&nbsp;Bosa Silvia,&nbsp;Rondinella Fabio","doi":"10.1016/j.ecss.2025.109196","DOIUrl":"10.1016/j.ecss.2025.109196","url":null,"abstract":"<div><div>Multi-inlet lagoons are complex environments with a generally high socio-economic value, which often require interventions aimed at stabilizing the inlets or improving navigability. The effects that arise from anthropogenic or natural changes localized in a single basin can concern the entire system since the basins are interconnected. This study analyses the changes occurring in the Marano and Grado lagoon over the last 52 years, with a 2DH numerical approach and the correlation between different hydrodynamic variables. In particular, tidal prisms, water levels, residual currents, asymmetries between tidal flood and ebb are analysed and discussed in the light of a new parameter called settling time. It suggests the time required by each basin to drain the volume of water stored during the rising tidal phase. The construction of the jetties to protect the Porto Buso inlet and the narrowing of the Lignano cross-section inlet have increased the settling time of the respective basins, while the loss of salt marshes in the Grado basin has reduced it. The results obtained show that any modification of the settling time of a basin in a tidal multi-inlet system lengthens or shortens the response of the basin itself to the tidal forcing. This also determines level gradients, and transverse flows that modify the hydrodynamic pattern of the neighbouring basins.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"316 ","pages":"Article 109196"},"PeriodicalIF":2.6,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419519","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":"Structure and dynamics of stationary fronts in an angled river plume","authors":"Keyan Liu ,&nbsp;Jiaxue Wu ,&nbsp;Huan Liu ,&nbsp;Xiangyu Li ,&nbsp;Zhenkun Lin ,&nbsp;Leiping Ye","doi":"10.1016/j.ecss.2025.109193","DOIUrl":"10.1016/j.ecss.2025.109193","url":null,"abstract":"<div><div>In angled river plumes, the river flow is oriented obliquely to the coast, leading to a lateral expansion into the sea rather than a radial one. However, the frontal structure and dynamics in these systems are not straightforward, especially under the influence of coastal currents. Here, we present detailed observations of an angled river plume and its fronts in the Macao waters. During the ebb tide, the river plume transitions from subcritical to supercritical due to the acceleration caused by lateral contraction. Despite this acceleration, the plume front remains nearly stationary, meeting the critical conditions in a coordinate system normal to the front. This quasi-stationary pattern of the front results from the plume expansion, which is established as a steady gravity current. Furthermore, the adjustment of the cross-flow reduces the Froude angle, causing the frontal shape to a half parabola. These findings offer novel understanding of stationary surface fronts in an angled river plume, which may trap the river-borne materials and pose significant challenges to coastal environments and ecosystems.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"316 ","pages":"Article 109193"},"PeriodicalIF":2.6,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454675","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":"Characterization of copepod ingestion rates in the Humboldt Archipelago and implications for a biogeochemical model in the Coquimbo upwelling system","authors":"Victor M. Aguilera ,&nbsp;Linda Barranco ,&nbsp;Pablo Gorostiaga ,&nbsp;Cristian A. Vargas ,&nbsp;Ruben Escribano ,&nbsp;Nicolas Bralic ,&nbsp;Véronique Garçon","doi":"10.1016/j.ecss.2025.109195","DOIUrl":"10.1016/j.ecss.2025.109195","url":null,"abstract":"<div><div>Copepod ingestion rates (IR) have not yet been addressed in the upwelling system of Coquimbo (30°S), despite their critical role in linking the region's high primary productivity to upper trophic levels and biodiversity within the Humboldt Archipelago. Given its natural variability and influence on mesozooplankton biomass, IR represents a challenging step during the parameterization of biogeochemical models employed to understand and predict the productivity of marine ecosystems. This has led to a reliance on simplified and imported information that does not necessarily represent the local environmental-ecological context, significantly influencing the uncertainty of the current generation of Earth system models. In the upwelling system of Coquimbo, the ENSO-Climate change and Carbon Cycle in the Pacific Southeast (ECLIPSE) project is parameterizing a coupled Biogeochemical model for Eastern Boundary Upwelling Systems (BioEBUS) since 2022. Thus, in addition to characterizing the IR of the copepods, the research effort aims to understand the relationship between the El Niño Southern Oscillation (ENSO) and oxygen/CO₂ fluxes in the sub-tropical upwelling regions of the HCS. To constrain BioEBUS outputs, in this study we report the results of grazing experiments conducted in the system throughout the 2023–2024 seasonal cycle, with different copepod species under food resources varying between 18 and 30 mg Chl m⁻² and 1–7 g C m⁻². The IR of <em>Calanus chilensis</em> (copepodite V and adult females)<em>, Calanoides patagoniensis, Metridia lucens</em> and <em>Paracalanus</em> cf<em>. indicus</em> varied between 2 and 63 μg C ind⁻¹ d⁻¹, maximum IR was 1.6 d⁻¹, while the IR of the corresponding size class reached 300 g C m⁻² d⁻¹. These results may alert the modeling community to reconsider parameterization information regarding mesozooplankton grazing rates.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"316 ","pages":"Article 109195"},"PeriodicalIF":2.6,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143445599","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":"Development of soil organic carbon quantification model and comparison based on CHN analyser, Loss on Ignition, and Walkley-Black methods for mangrove soils in Madagascar","authors":"Ismael Ratefinjanahary ,&nbsp;Richard MacKenzie ,&nbsp;Sahadev Sharma ,&nbsp;Herintsitohaina Razakamanarivo ,&nbsp;Voahirana Razafintsalama ,&nbsp;Kevin Ravelosamiariniriana ,&nbsp;Adam Welti ,&nbsp;Nandrianina Ramifehiarivo","doi":"10.1016/j.ecss.2025.109182","DOIUrl":"10.1016/j.ecss.2025.109182","url":null,"abstract":"<div><div>Mangrove ecosystems have a high capacity to sequester and store atmospheric carbon dioxide (CO₂) compared to other tropical forests. Most of this CO₂ is stored as organic carbon in the mangrove soils (50–90%). While quantifying carbon stocks in mangrove trees is generally a straightforward process, quantifying carbon stocks in mangrove soils can be difficult and expensive due to the lack of analytical equipment or the high costs associated with soil organic carbon (SOC) analysers, respectively. The large number of samples coupled with repeated soil sampling required to quantify soil carbon sequestration/burial rates can further inflate these costs. The development of SOC models to quantify carbon content can help resolve these issues and increase the ease of quantifying soil carbon stocks or sequestration rates. We compared different methods to quantify SOC stocks from multiple locations in Madagascar mangroves. A total of 1327 soil samples from 66 plots sampled from the west coast of Madagascar were consecutively analysed with the Walkley-Black (WB), Loss on Ignition (LOI₄₀₀, LOI₅₅₀) and CHN analyser methods. These four available methods resulted in significant differences (<em>p</em> &lt; 0.001) of SOC values, varying from 1.93 ± 0.04% with CHN, 4.49 ± 0.08% with LOI_400, 4.54 ± 0.09% with WB, and 7.33 ± 0.11% with LOI₅₅₀. As the CHN method is widely regarded as the most accurate method thus, CHN values were used to calibrate and estimate LOI_400, LOI₅₅₀ and WB results with linear regression functions. After calibration, the coefficient of regressions resulted in conversion factors of 0.415 for WB, 0.253 for LOI₄₀₀ and 0.157 for LOI₅₅₀. This study demonstrated the reliability of locally available methods for SOC analysis for mangroves and developed calibration coefficients that can be used to increase the accuracy of SOC methods when CHN analyzers are not available for blue carbon stock assessment.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"317 ","pages":"Article 109182"},"PeriodicalIF":2.6,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471356","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":"Procedural problems with peer review, impact factor and citation index: A response to Borja and Elliott (2024)","authors":"Carlo Nike Bianchi ,&nbsp;Antonio Di Natale ,&nbsp;Pablo Abaunza Martinez ,&nbsp;Alain Fonteneau ,&nbsp;Giuseppe Manzella ,&nbsp;Sergio Ragonese ,&nbsp;George Tserpes ,&nbsp;Molly Lutcavage","doi":"10.1016/j.ecss.2025.109184","DOIUrl":"10.1016/j.ecss.2025.109184","url":null,"abstract":"","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"316 ","pages":"Article 109184"},"PeriodicalIF":2.6,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419520","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":"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":"Phylogeography of the kelp-dwelling isopod Amphoroidea typa H. Milne Edwards (1840) along the coast of continental Chile","authors":"Lapo Ragionieri ,&nbsp;Ariel Fierro ,&nbsp;Miguel Angel Penna-Díaz ,&nbsp;Christoph D. Schubart ,&nbsp;Martin Thiel","doi":"10.1016/j.ecss.2025.109168","DOIUrl":"10.1016/j.ecss.2025.109168","url":null,"abstract":"<div><div>Isopods, characterized by direct development, lack a planktonic stage that would allow for long-distance dispersal. For some herbivorous species, though, rafting on floating macrophytes (including seaweeds) could be a mechanism to facilitate population connectivity over wide distances. In addition, the phylogeography of these species is expected to be related to that of their dispersal vectors. In the current study, we sequenced a fragment of 636 bp of the COxI gene in 107 individuals of the kelp-dwelling isopod <em>Amphoroidea typa</em> from ten populations along 2500 km of the Chilean coast (27°S – 43°S); no isopods were found at two sites in northern Chile (21°S and 23°S). Our results reveal the existence of population genetic structure and isolation by distance in <em>A. typa</em>. We identified three geographic groups: one represented by the four northernmost populations (27°-32°S), a second one including two central populations (34°-37°S), and the last one comprising the southernmost populations (39°-43°S). These results are partially explained by the effect of El Niño, which enhances extinction and recolonization of kelp forests and associated grazers north of 30°S. The results show that <em>A. typa</em> does not have any specific kelp preferences and dwells on kelp species with different dispersal capabilities, such as the non-buoyant <em>Lessonia</em> spp. and the floating giant kelp <em>Macrocystis pyrifera</em>. Individuals of <em>A. typa</em> appear capable of switching between different kelp hosts during their lifetime, including vectors that permit rafting over long distances, and thereby contribute to population connectivity throughout the distribution range of this herbivorous isopod. The main outcomes of the current study support the idea that organisms dwelling on positively buoyant macrophytes can effectively disperse together with their floating hosts.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"317 ","pages":"Article 109168"},"PeriodicalIF":2.6,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143510533","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}