Journal of Sea Research最新文献

{"title":"Observed near-inertial waves generated by tropical and extratropical cyclones in the East China Sea","authors":"Yishan Niu ,&nbsp;Zhenhua Xu ,&nbsp;Zhanjiu Hao ,&nbsp;Jia You ,&nbsp;Baoshu Yin ,&nbsp;Xinzhu Meng","doi":"10.1016/j.seares.2023.102458","DOIUrl":"https://doi.org/10.1016/j.seares.2023.102458","url":null,"abstract":"<div><p>Both tropical and extratropical cyclones can affect the East China Sea (ECS) shelf in summer. Based on a current mooring deployed in 2014, near-inertial waves (NIWs) triggered by both extratropical and tropical cyclones were examined. During the observation period, three tropical cyclones (i.e., NEOGURI, MATMO, and NAKRI) passed by the mooring site. MATMO and NAKRI led to obvious near-inertial responses. The weakest tropical cyclone (MATMO) caused the strongest NIWs due to its large translation speed and favorable position relative to the mooring site. Mode 1 dominates the vertical structure of the NIWs caused by tropical cyclones. Due to the modulation of the background vorticity, the NIWs show a significant blueshift. However, the NIWs caused by extratropical cyclones are mainly concentrated near the surface layer with a higher proportion of mode-2 NIWs. The highest value of the near-inertial kinetic energy generated by extratropical cyclones is about half of that generated by tropical cyclones. In addition, both two kinds of cyclones can lead to an enhancement of sub-inertial current in the ECS shelf. The nonlinear interactions between NIWs and semidiurnal internal tides (D₂) are also evidenced, with the NIWs being a potential trigger for D₂-<em>f</em> waves. This study highlights the important role of NIW on the nonlinear interactions and energy transfer within the internal wave spectral continuum in the continental shelf region.</p></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1385110123001272/pdfft?md5=f96049e2c54c9e7f505380a35bb49e50&pid=1-s2.0-S1385110123001272-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138490909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Annual patterns of green tides blooms in the coastal waters of Qinhunagdao from 2018 to 2020","authors":"Yan Li ,&nbsp;Xiaojun Ma ,&nbsp;Meijie Jiang ,&nbsp;Wei Song ,&nbsp;Hongbin Han","doi":"10.1016/j.seares.2023.102461","DOIUrl":"https://doi.org/10.1016/j.seares.2023.102461","url":null,"abstract":"<div><p>Green tide disasters have been occurring along the Qinhuangdao coastal area for several years since 2015. This study investigated the interannual changes of green tides in Qinhuangdao from 2018 to 2020 and found that the green algae biomass was significantly reduced in 2020. The peak biomass of the green tide in July was only 151.5 g m⁻³, which is significantly lower than 7789.4 g m⁻³ in July 2018 and 5873.9 g m⁻³ in July 2019. Further comparative analysis showed that the decrease in nutrients, reduction in the density of <em>Ulva</em> microscopic propagules, and low biomass of attached macroalgae on the seaweed beds along the Jinmenghaiwan bath coastal area were the main causes for the decrease in the scale of green tides in Qinhuangdao in 2020. This paper also summarizes the factors of green tide formation in Qinhuangdao and proposes relevant prevention and control suggestions for the local governments based on the previous research.</p></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1385110123001302/pdfft?md5=f96a6bd2474b4d41cc2911f617f4c311&pid=1-s2.0-S1385110123001302-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138501707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Lateral changes of crustal extension and passive margin type along the Brazilian southeastern margin","authors":"Mikael Arnemann ,&nbsp;Vitor Abreu ,&nbsp;Sidnei Rostirolla ,&nbsp;Eduardo Barboza","doi":"10.1016/j.seares.2023.102459","DOIUrl":"https://doi.org/10.1016/j.seares.2023.102459","url":null,"abstract":"<div><p>For the last half century, studies based on an increasing, diverse data set, have focused on passive continental margin evolution, as a result of a sequence of tectonic processes that occur in crustal scale and in the geological time. Where extensive subsurface data exists, two distinct endmembers of continental margin architectures were first described along specific margins of the North Atlantic: 1) wide continent-ocean transitions or hyper-extended; 2) narrow continent-ocean transitions or hypo-extended. The lateral transition between these endmember margins, which can occur laterally in short distances, is still not fully understood. The same two endmember margin types are observed across passive margins around the world and notably along the South Atlantic margin. In an area known for controversial interpretations about the crustal nature and the limits of thinned continental crust, this investigation integrates crustal thickness, seismic interpretation, and facies analyses across ∼150,000 km of seismic data along the Brazilian southeastern margin. This study has implications for those investigating the crustal geometry variations for basin analysis and results impact hydrocarbon assessments for the southeastern margin of Brazil. We resume continental margin analyses, in a critical moment as hydrocarbon exploration advances from the continental slope to ultra-deep waters. Results indicate a marked change from a narrow, hypo-extended, sub-aerial, Iceland-like, plume-related volcanic crust in the Pelotas Basin, to a hyper-extended, Iberia-like, magma-rich crust in the Santos Basin, which is separated by a pronounced oceanic transform-fault zone. Dextral movement along this NW-oriented fault zone accommodated differential extensional rates between the hypo- and the hyper-extended margins. Lateral variations in magmatic content within these margin types are interpreted as result from the interaction with mantellic plumes. Margin architecture can locally be affected by pre-existing fault zones and be later modified by oceanic transform faults. The interactions between crustal extensional rates, crustal rheology, mantle underplating, and volcanic material exhumed through mantle-derived plumes, are the key controls for the evolution of continental margins. Tectonic framework classification proposed in this study presents an alternative, original model for continental passive margins evolution.</p></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1385110123001284/pdfft?md5=8d051ec10723e9f7e07889e2607366f9&pid=1-s2.0-S1385110123001284-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138475172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Modelling the role of marine protected area in biodiversity conservation","authors":"Subrata Sarker ,&nbsp;Md Jalilur Rahman ,&nbsp;Md Abdul Wahab","doi":"10.1016/j.seares.2023.102457","DOIUrl":"https://doi.org/10.1016/j.seares.2023.102457","url":null,"abstract":"<div><p>This study explored the anthropogenic stressors of a coral habitat and predicted the role of a proposed MPA around coral habitat on biodiversity conservation. The study was conducted in the Saint Martin's Island which is located in the south east coastal area of Bangladesh. Data on anthropogenic stressors were collected through intensive stakeholder survey and the role of MPA in biodiversity conservation was explored by utilizing Allometric Trophic Network model. This study identified about 16 anthropogenic stressors for the coral reef ecosystem. Increasing fishing pressure significantly reduced the species biomass while reduced fishing pressure increased the biomass of species. Biomass of the species in the system with no fishing area increased significantly (3–6%) while compared with the species biomass of an area without fishing restriction. Our simulations found that imposing fishing restriction in an exploited system significantly improve the species standing stock. Our model outputs suggest that declaration of MPA is beneficial for conservation of biodiversity. However, for sustainable implementation of conservation initiatives a proper management framework is necessary integrating diverse stakeholders.</p></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1385110123001260/pdfft?md5=9766d33189a1d0f30e095166cc5dd9f9&pid=1-s2.0-S1385110123001260-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91959610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Improving phytoplankton abundance estimation accuracy for autonomous microscopic imaging systems","authors":"Xiaoping Wang ,&nbsp;Dingpeng Huang ,&nbsp;Hangzhou Wang ,&nbsp;Kan Guo ,&nbsp;Hang Zhou","doi":"10.1016/j.seares.2023.102456","DOIUrl":"https://doi.org/10.1016/j.seares.2023.102456","url":null,"abstract":"<div><p>A novel method to accurately estimate phytoplankton abundance is proposed for an autonomous microscopic imaging system (AMIS) herein. To this end, a fast fluorescence detection module is developed and added to an imaging in-flow cytometer to record the fluorescence and side-scattered signals of individual phytoplankton particles, including of those that cannot be photographed by the AMIS. Image information and the coupling relationship between the fluorescence and side-scattered signals are used to accurately detect and estimate the phytoplankton counts in water samples. The performance of the proposed estimation method is evaluated on water samples containing <em>Alexandrium tamarense</em>, <em>Chattonella marina</em>, and <em>Scrippsiella trochoidea</em>. The abundance estimation accuracies for these species are found to be better than 95%, 97%, and 93%, respectively, when compared to results obtained using counting chambers. The performance of the method is further evaluated by mixing the collected data of the three phytoplankton species and classifying them based on fluorescence and side-scattered signals only, assuming that these species are included in the image data but not photographed individually. The overall estimation accuracy based on this complex matrix of the three species is found to be 95.3%. These results demonstrate the suitability and practicality of the proposed method for accurately evaluating phytoplankton abundance in water. The algorithm used in this study can be a reference for other imaging in-flow cytometers.</p></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1385110123001259/pdfft?md5=562b0446530257ec2d5b00a334258008&pid=1-s2.0-S1385110123001259-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91959609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"The impact of marine industrial structure rationalization on marine economic growth","authors":"Dongqin Li","doi":"10.1016/j.seares.2023.102455","DOIUrl":"10.1016/j.seares.2023.102455","url":null,"abstract":"<div><p>As an important part of the world economy today, the marine economy is of great significance for promoting economic growth and sustainable development. To better promote the development of marine economy, the Augmented Dickey-Fuller (ADF) unit root test was first used to test the stationarity of marine economy related variables to ensure the reliability of the model. Then, the Vector Error Correction Model (VECM) is used to analyze the long-term stable relationship and short-term dynamic adjustment relationship between the marine industrial structure rationalization and the marine economic growth. These results reveal the mechanism of the influence of the rationalization of marine industrial structure on the growth of marine economy. It is found that among the eastern coastal provinces and cities, the rationalization level of marine industrial structure in Shanghai is up to 0.163 points, which is higher than other cities. The main reasons are the low specialization index of marine labor force, the comprehensive utilization amount of industrial waste in 10,000 yuan of gross marine product, the low environmental protection index, and the large gap between the benefits of each index. In addition, the study also found that the Granger causality test values of the delayed combination of variables Gross Ocean Product (GOP), ts, GOP, and ts were 5.531, 14.672, and 15.069, respectively. Finally, it is found that the upgrading of marine industrial structure and the output of marine economy will correct the deviation of industry rationalization below the equilibrium value in the short term at a rate of 0.1675. According to the above results, the study puts forward the following suggestions. First, it needs to strengthen the planning and layout of the marine industry, rationally guide the allocation of resources and industrial development. Second, it needs to increase support for scientific and technological innovation, and promote technological progress and industrial upgrading. The third is to strengthen the government's policy support and supervision to provide a stable policy environment and market environment for industrial development. The innovation lies in the systematic study of the relationship between the rationalization of marine industrial structure and the growth of marine economy.</p></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1385110123001247/pdfft?md5=7d01fd1f2f52933c088e0ce033dcfc63&pid=1-s2.0-S1385110123001247-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135325784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"High-resolution optical remote sensing geomorphological mapping of coral reef: Supporting conservation and management of marine protected áreas","authors":"Julia Caon Araujo ,&nbsp;José Carlos Sícoli Seoane ,&nbsp;Gislaine Vanessa Lima ,&nbsp;Erandy Gomes da Silva ,&nbsp;Luis Guilherme França ,&nbsp;Elisa Elena de Souza Santos ,&nbsp;Iago Mendes de Oliveira ,&nbsp;Pedro Henrique Cipresso Pereira","doi":"10.1016/j.seares.2023.102453","DOIUrl":"https://doi.org/10.1016/j.seares.2023.102453","url":null,"abstract":"<div><p>Brazilian corals are unique ecosystems with high endemism and low functional redundancy. Hence, mapping its geomorphology is an important step to inferring analyzes on benthic habitats. We observe several difficulties during this mapping of coastal areas by remote sensing and a lack of fine-scale depth data for reef areas in Brazil. The present study aims to present the bathymetry extracted by satellite imagery in murky waters using a mosaic of Sentinel-2 images in Google Earth Engine (GEE) calibrated with field samples. We used the satellite extracted DBM to map the bottom geomorphology through BTM (Benthic Terrain Modeler). We then present the first detailed geomorphological map for the largest marine coastal protected area in Brazil- MPA Costa dos Corais. The geomorphological raster was differentiated into seven classes: Flat Plains, Depressions, Gentle Slopes, Slopes, Terrestrial Reef Flat, Reef Flat, and Crest. Altogether, we estimate &gt;275 km² of area representing reef structures (coral reef or beachrocks), or about 48% of the total MPA area. Mapping coral reefs can contribute to conservation, particularly in selecting areas for in situ monitoring activities and in prioritizing the application of remedial actions in the event of environmental disasters or threats to coral health, such as oil spills and bleaching episodes. Our findings encourage the applicability of these methodologies in other reef areas and collaborate for the management and monitoring of marine protected areas. In addition, all mapping is available online for any user.</p></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1385110123001223/pdfft?md5=a3ce5c0f9f29522f7d0ccdcf7babc76f&pid=1-s2.0-S1385110123001223-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91959560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Environmental legacy of aquaculture and industrial activities in mangrove ecosystems","authors":"Aninditia Sabdaningsih ,&nbsp;Dini Adyasari ,&nbsp;Suryanti Suryanti ,&nbsp;Sigit Febrianto ,&nbsp;Yuriza Eshananda","doi":"10.1016/j.seares.2023.102454","DOIUrl":"https://doi.org/10.1016/j.seares.2023.102454","url":null,"abstract":"<div><p>Aquaculture and industrial activities have been recognized for their detrimental impact on coastal environment, particularly through large-scale mangrove conversion. This study employs interdisciplinary spatial, geochemical, and metagenomic approaches to examine the environmental legacy of past aquaculture and industrial activities in mangrove rehabilitation areas. The land use change of mangrove, aquaculture, and industrial area was investigated from 1990 to 2020. Mangrove coverage increased in the study area from 49.12 ha in year 1990 to 95.93 ha in 2020. This growth can be attributed to increasing environmental awareness related to issues such as tidal flooding, seawater intrusion, and coastal abrasion. However, despite increasing mangrove coverage, we still identified fecal bacteria communities in both sites, dominated by Campylobacteria, Gammaproteobacteria, and Deltaproteobacteria. Additionally, our functional prediction analysis revealed the presence of genes associated with pathogenicity, multidrug/antibiotic resistance, and xenobiotic degradation. We observed high nitrate concentration associated with aquaculture waste that was persistent in porewater even after the activity ended years ago. Low to moderate heavy metal concentration was found in the study sites, likely due to the role of mangroves as a biofilter. We conclude that mangrove restoration contributes to the lower environmental impact of anthropogenic activities on our sites. Therefore, it should be included in future coastal management plans to improve coastal water quality and ecosystem function in environmentally threatened areas.</p></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1385110123001235/pdfft?md5=0bb6ddf9bf230e27562dbdc605b55dec&pid=1-s2.0-S1385110123001235-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91986794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Reconstruction of climate-induced environmental changes in the eastern Gulf of Mexico based on foraminifera sediment assemblages","authors":"Anna Binczewska ,&nbsp;Wojciech Majewski ,&nbsp;Anna Wachnicka ,&nbsp;Thomas Frankovich ,&nbsp;Ryszard K. Borówka ,&nbsp;Joanna Sławińska ,&nbsp;Małgorzata Bąk ,&nbsp;Andrzej Witkowski","doi":"10.1016/j.seares.2023.102451","DOIUrl":"https://doi.org/10.1016/j.seares.2023.102451","url":null,"abstract":"<div><p>Foraminifera assemblages are powerful bioindicators of environmental change and were analyzed in a sediment core collected from the Marquesas Keys, located in the southwestern region of the Florida Keys. The composition and abundance of foraminifera tests within the top 85 cm of the sediment core, dated with ¹⁴C and ²¹⁰Pb, revealed changes in foraminifera assemblages in 1990 CE, 1939 CE, and 1872 CE. Based on the ecological preferences of the dominant species, changes in salinity and submerged aquatic vegetation (SAV) cover may have influenced foraminifera species composition. These changes were likely caused by variation in precipitation patterns in the eastern Gulf of Mexico region associated with shifts in the major ocean-atmosphere teleconnections such as the El Niño Southern Oscillation (ENSO), Atlantic Multidecadal Oscillation (AMO), North Atlantic Oscillation (NAO) along with tropical storms and hurricanes. Prolonged periods of the negative phases of these climate phenomena coincided with shifts in foraminifera assemblages. Despite a generally negative impact of the ocean-atmosphere teleconnections on the South Florida region, a well-developed epiphytic assemblage was recorded in the studied core. The assemblage was recorded in the uppermost part of the core and dated to the period between 1990 and 2010 CE. This implies that a dense SAV community was present within the Marquesas Keys Mooney Harbor since at least the early 1990.</p></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S138511012300120X/pdfft?md5=357770e8fa5b8d6d4a3949a522e667b6&pid=1-s2.0-S138511012300120X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91959559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Species turnover drives functional turnover with balanced functional nestedness in a Patagonian demersal assemblage","authors":"Josefina Cuesta Núñez ,&nbsp;María Alejandra Romero ,&nbsp;Matías Ocampo Reinaldo ,&nbsp;Raúl González ,&nbsp;Anne Magurran ,&nbsp;Guillermo Martín Svendsen","doi":"10.1016/j.seares.2023.102452","DOIUrl":"https://doi.org/10.1016/j.seares.2023.102452","url":null,"abstract":"<div><p>Marine communities are changing at an accelerated rate because of anthropogenic stressors such as global warming and overfishing. Community compositional change over time (temporal β diversity) is mainly driven by the replacement of species. The consequence of this change on community functioning is still unclear. In this study, we assessed the magnitude and direction of both taxonomic and functional compositional change in a demersal community subject to fishing and incipient sea warming over a recent 12-year period. We also evaluated the relative roles of turnover and nestedness components on both dimensions of temporal β diversity and identified which species are driving compositional change. Compositional data was collected during five surveys that took place between 2006 and 2018. We used linear mixed models to test for temporal change in species richness and taxonomic and functional dissimilarity and its components. While species richness remained constant, taxonomic and functional dissimilarity increased through time, with turnover contributing most to total dissimilarity in both cases. Taxonomic turnover of around 15% of species per decade produced a functional replacement of 13% per decade. The main functional change is probably due to the spatial expansion of three species of crustaceans which are bringing functional novelty to certain areas of the gulf. We found that local extinctions and colonization were balanced, which suggests that species richness is being regulated at the local scale within the gulf. We also found a balance in functional nestedness, which leads us to infer that this variable is also being regulated at the community level.</p></div>","PeriodicalId":50056,"journal":{"name":"Journal of Sea Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2023-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1385110123001211/pdfft?md5=0e374f49658fa0a9aefcdb4583dd159a&pid=1-s2.0-S1385110123001211-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91959608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}