Progress in Oceanography最新文献

{"title":"Spatial and seasonal variation in bioturbation potential of Macrobenthic communities in Bohai Bay","authors":"Yifeng Shi ,&nbsp;Wenzhe Xu ,&nbsp;Rui Gu ,&nbsp;Wenxin Zhou ,&nbsp;Guicheng Zhang ,&nbsp;Yu Guo ,&nbsp;Yiyan Guo ,&nbsp;Jun Sun","doi":"10.1016/j.pocean.2025.103663","DOIUrl":"10.1016/j.pocean.2025.103663","url":null,"abstract":"<div><div>In coastal benthic ecosystems, bioturbation is one of the most important ecosystem functions. However, the understanding of how this function changes under anthropogenic and climatic stresses is still insufficient. In this study, we quantified the potential bioturbation capacity of macrobenthos in Bohai Bay based on their traits such as the type of sediment modification and motility. In terms of biodiversity, the nearshore biodiversity was low in the wet season and recovered rapidly in the dry season. The biodiversity of offshore communities was relatively stable. In terms of bioturbation potential, the functional stability of the nearshore community was significantly lower than that of the offshore community, as evidenced by the fact that the nearshore bioturbation potential was severely suppressed in the wet season and released in the dry season. Nearshore bioturbation potential rose from a mean of 51.2 to 231.9, whereas offshore values increased more modestly (88.3 to 124.2). The increase in polychaetes largely supported the restoration of diversity and function in the nearshore community in the dry season, especially for some potentially large-bodied species. Additionally, the species dominating the bioturbation in the nearshore community in the dry season were very similar to those in the offshore community, implying that the dispersal of functionally important species in adjacent waters is an important mechanism for the functional recovery of the local community. Although functional recovery in the nearshore region has been faster than expected. However, seasonal fluctuations in the huge bioturbation potential of this region raised our unease about seasonal impairment of benthic function. These findings provide insights into the resilience of benthic functions under eutrophication stress.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"241 ","pages":"Article 103663"},"PeriodicalIF":3.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145884044","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":"Global classification of wave height, period, and direction multivariate distributions using principal component analysis","authors":"Ophélie Choupin ,&nbsp;Joseph Harari ,&nbsp;László Könözsy","doi":"10.1016/j.pocean.2025.103660","DOIUrl":"10.1016/j.pocean.2025.103660","url":null,"abstract":"<div><div>Research on the classification of ocean surface wave patterns uses coarse spatial resolutions and approaches that are less usable for applications such as annual energy estimates for wave energy converters. Consequently, this study investigates the classification of 1–3-dimensional histograms of wave height, period, and direction at a 0.4° spatial resolution. Histograms of global grid-points have been decomposed into their main modes using principal component analysis. Each mode consists of a histogram and a map quantifying its contribution to each local wave pattern. The first mode displayed a meridional gradient of the wave height, a northeast-to-southeast gradient of the wave period, and a mix of both for the wave direction. Dominating wave systems consist of a) 1.9 m, b) 14.5 s in the basins’ southeast, c) 12.5 s north and south, and d) 9.5 s north-west. Generated remotely, c) travel and evolve over long distances to reach coasts, as b) pools, while d) is mainly generated locally or northwards. K-means was used to cluster wave patterns into 15 classes using the 10 dominant modes. Some clusters characterise regions in different basins. 1-parameter-based clusters provide more regions and alternations of clusters nearshore, while clustering the parameters together provides larger regions and less nearshore noise. The wave height and period combined classification showed good correlation and difference between the cluster’s average histogram and those of the grid-points in that cluster, while the direction was lower in regions affected by strong currents or topographic obstacles. Consequently, combining all parameters greatly decreases these two metrics.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"241 ","pages":"Article 103660"},"PeriodicalIF":3.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145844679","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 the Kuroshio Current on the benthic communities in the southern seas of Korea","authors":"Sang Lyeol Kim ,&nbsp;Hyung-Gon Lee ,&nbsp;Kyung-Hee Oh ,&nbsp;Kongtae Ra ,&nbsp;Ok Hwan Yu","doi":"10.1016/j.pocean.2025.103658","DOIUrl":"10.1016/j.pocean.2025.103658","url":null,"abstract":"<div><div>The Kuroshio Current, a major western boundary current in the North Pacific, intrudes into the southern seas of Korea through the Tsushima Warm Current (TWC) and exerts strong influence on benthic ecosystems. From 2015 to 2024, we assessed seasonal variability in hydrography, sediments, and benthic macrofauna. Summer conditions featured warmer surface waters (27.8 °C), lower dissolved oxygen, and more organic-rich, coarse sediments. Benthic communities showed clear seasonality, with all community metrics highest in spring, lowest in winter, and intermediate in summer and autumn. Sediments were mainly sandy silt and silty sand, dominated by polychaetes, with higher species density and biomass observed in summer and autumn. Bottom temperature was modestly related to richness and density, while biomass declined with surface warming. These patterns closely resemble observations from other Kuroshio-affected regions, including seasonal oxygen depletion and organic enrichment on the East China Sea shelf, enhanced nutrient flux and benthic shifts off Taiwan, and polychaete-dominated assemblages in southern Japan. The convergence of these features across Kuroshio-influenced margins provides evidence that the benthic ecosystems of Korea are directly shaped by the hydrographic and biogeochemical forcing of the Kuroshio system.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"241 ","pages":"Article 103658"},"PeriodicalIF":3.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145786142","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":"Diversity, drivers, and dispersal of high Arctic meroplanktonic communities","authors":"Kharis R. Schrage ,&nbsp;Johanna N.J. Weston ,&nbsp;Alexandra Kraberg ,&nbsp;Rebecca McPherson ,&nbsp;Wilken-Jon Von Appen ,&nbsp;Loreley Lago ,&nbsp;Kirstin S. Meyer-Kaiser","doi":"10.1016/j.pocean.2025.103656","DOIUrl":"10.1016/j.pocean.2025.103656","url":null,"abstract":"<div><div>Rapid Arctic warming is altering marine ecosystems, yet the diversity and dispersal of meroplankton—larval stages of benthic invertebrates—remain poorly understood in the region. This study presents the first detailed characterization of meroplanktonic communities in the Fram Strait, based on summer collections made in 2023 and 2024 across the Long-Term Ecological Research observatory HAUSGARTEN. Using integrated and depth-stratified vertical net tows and DNA barcoding, we identified 77 taxa, 33 of which were identified to the species level. Meroplankton were most dense in the upper 200 m, dominated by bivalves and ophiuroids, with significant patchiness across depths and regions. Community composition was related to water mass and phytoplankton community composition (explaining 25 % of the variability among stations), but not to sea ice cover, reflecting a complex coupling between benthic reproduction and pelagic conditions. Lagrangian particle tracking revealed that larvae in the West Spitsbergen Current may originate from as far south as northern Norway, while East Greenland Current larvae likely derive from central Arctic waters. Species-level investigations of meroplankton distribution are critical for assessing existing biodiversity and detecting changes to species composition. Here, most larvae belonged to local or Arcto-Boreal species, though seven taxa had no adult records in the Fram Strait, which may indicate larvae being wasted (not surviving to settlement), broad connectivity among coastal Arctic populations, and/or range expansions. These findings highlight the interplay between hydrography and hydrodynamics, larval ecology, and climate-driven change, and establish a baseline for monitoring Arctic benthic connectivity and biodiversity under ongoing ocean warming.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"241 ","pages":"Article 103656"},"PeriodicalIF":3.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145844680","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":"Interannual variability and depth-dependence in pathways of Iceland–Scotland Overflow Waters exiting the Iceland Basin","authors":"Ali Johnson Exley ,&nbsp;Amy Bower ,&nbsp;Xiaobiao Xu ,&nbsp;Sijia Zou ,&nbsp;Anna Pinckney ,&nbsp;Heather Furey","doi":"10.1016/j.pocean.2025.103662","DOIUrl":"10.1016/j.pocean.2025.103662","url":null,"abstract":"<div><div>Iceland–Scotland Overflow Water (ISOW), a dense water mass formed in the Nordic Seas, spills into the Iceland Basin through the Iceland-Faroe Ridge and Faroe Shetland Channel before propagating southwestward along the eastern flank of the Reykjanes Ridge as a deep boundary current, contributing to the lower limb of the Atlantic Meridional Overturning Circulation. Recent work has demonstrated that pathways of ISOW out of the Iceland Basin are complex and variability has not been explored on interannual and longer timescales. In this study, we use the basin-scale, eddy-rich (1/12°), 40-year Atlantic Hybrid Coordinate Ocean Model (HYCOM) simulation to investigate the variability in ISOW export pathways. Simulated Lagrangian particles are released within the ISOW layer (<span><math><mrow><msub><mrow><mi>σ</mi></mrow><mrow><mn>0</mn></mrow></msub><mo>&gt;</mo></mrow></math></span> 27.80 kg m⁻³) at two locations along the eastern flank of the Reykjanes Ridge and classified according to their export pathway: over the Reykjanes Ridge, through the Charlie Gibbs Fracture Zone (CGFZ) or into the Western European Basin (WEB). We show that export over the Reykjanes Ridge exhibits variability on timescales from 2.5 years to decadal and is strongly correlated with mid-depth northward transport into the Iceland Basin forced by fluctuations in the North Atlantic Current (NAC), suggesting a link to large-scale gyre dynamics. Export through the CGFZ is characterized by variability of 2.5–5 years and is influenced by the meridional position of the eastward-flowing NAC within the CGFZ, which can block ISOW export and divert particles into the WEB. Export pathways are shown to exhibit a significant depth-dependence such that shallower layers are more strongly impacted by the surface circulation while deeper layers are more subject to topographic steering, results that are corroborated by utilizing observations from RAFOS floats deployed during the OSNAP campaign. Together, these findings illustrate the high-degree of variability in pathways of ISOW export and contributes to the growing body of evidence that challenges the notion of a single, dominant pathway out of the Iceland Basin.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"242 ","pages":"Article 103662"},"PeriodicalIF":3.6,"publicationDate":"2025-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145894968","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":"Beyond temperature: predictive modelling of range shifts in benthic peracarids across the northern North Pacific under future climate scenarios","authors":"Stefanie Kaiser ,&nbsp;Anna M. Jażdżewska ,&nbsp;Sarah Gerken ,&nbsp;Anne Helene S. Tandberg ,&nbsp;Chih-Lin Wei ,&nbsp;Davide Di Franco ,&nbsp;Hanieh Saeedi ,&nbsp;Hannah Owens ,&nbsp;Henry Knauber ,&nbsp;Emma Palacios Theil ,&nbsp;Angelika Brandt ,&nbsp;Pedro Martinez Arbizu ,&nbsp;Jens Oldeland","doi":"10.1016/j.pocean.2025.103657","DOIUrl":"10.1016/j.pocean.2025.103657","url":null,"abstract":"<div><div>Accelerating climate change driven by greenhouse gas emissions is profoundly impacting marine biodiversity. Some species are shifting their geographic ranges toward more favourable environments, while others lose suitable habitat and face extinction. We examined the effects of climate change on selected benthic peracarid species (Amphipoda, Cumacea, and Isopoda) in the Pacific Arctic, Pacific Subarctic, and North Pacific temperate ecosystems—regions characterized by environmental sensitivity and unique topography. Using Maximum Entropy (MaxEnt) modelling, we identified key environmental drivers of species occurrence and projected horizontal and vertical shifts until 2050 and 2100 under RCP 2.6 and 8.5 scenarios. We further analysed how ecological traits such as diet, mobility, and life habit correlate with distributional responses. While most species shifted northward, some exhibited unexpected directional changes, likely due to regional differences in climate velocity, environmental change, and species-specific responses. Temperature emerged as a primary determinant for many species, with dissolved oxygen and salinity also playing critical roles. Our findings indicate that traits—particularly diet and bathymetric distribution—affect potential habitat expansions or contractions, categorizing species as potential “winners” or “losers.” Despite challenges including deep-sea data limitations and complex trait interactions, our study provides vital insights into future peracarid distributions. These results underscore the need for refined predictive models and targeted conservation strategies to enhance ecosystem resilience and sustainable resource management in a warming ocean.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"242 ","pages":"Article 103657"},"PeriodicalIF":3.6,"publicationDate":"2025-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145844678","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":"Future seasonal changes of marine heatwaves in the Arabian Sea and Bay of Bengal","authors":"Danushka Deegala,&nbsp;Eun-Sung Chung","doi":"10.1016/j.pocean.2025.103661","DOIUrl":"10.1016/j.pocean.2025.103661","url":null,"abstract":"<div><div>This study investigated the marine heatwaves (MHWs) in the Arabian Sea (AS) and Bay of Bengal (BoB) during pre-monsoon (March-April-May, MAM), monsoon (June-July-August-September, JJAS), and post-monsoon (October-November-December, OND) seasons using observations from NOAA and the simulations from 17 CMIP6 Global Climate Models (GCMs) under four Shared Socioeconomic Pathways (SSPs). MHW metrics of frequency, maximum intensity, and duration were analyzed for the historical period (1985–2014) and for the near (2031–2060, NF) and far (2061–2090, FF) future periods. Two approaches, fixed-baseline and shifted-baseline, were applied for the future projection of MHWs. Observed NOAA values indicated higher trends in AS compared to BoB for all MHW metrics during all seasons. Future projections under the fixed-baseline approach indicated model agreement on positive shifts ranging from 43<!--> <!-->% to 136<!--> <!-->% for frequency, 89<!--> <!-->% to 173<!--> <!-->% for maximum intensity, and 545<!--> <!-->% to 1225<!--> <!-->% for duration in the NF compared to the historical, with BoB showing higher positive changes than AS during JJAS and OND under all SSPs. The fixed-baseline approach suggested MHWs attaining a permanent state towards the FF. Model agreement on future trends under the shifted-baseline indicated higher trend values in the NF compared to historical from SSP2-4.5 to SSP5-8.5 across all MHW metrics during all seasons, while the FF indicated higher trends from SSP3-7.0 to SSP5-8.5. Additionally, under the shifted-baseline, FF exhibited higher trend values than NF. Model agreement under the fixed-baseline approach indicated more vulnerability in the northwestern regions of AS to an increase of MHW frequency during MAM and JJAS in the NF.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"241 ","pages":"Article 103661"},"PeriodicalIF":3.6,"publicationDate":"2025-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145823462","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":"Surface water pCO2 and air-sea fluxes in the southeastern coast of Mainland China: Synthesis of a 22-year dataset of field observation","authors":"Dezhi Bu ,&nbsp;Xianghui Guo ,&nbsp;Weidong Zhai ,&nbsp;Yi Xu ,&nbsp;Minhan Dai","doi":"10.1016/j.pocean.2025.103659","DOIUrl":"10.1016/j.pocean.2025.103659","url":null,"abstract":"<div><div>Air-sea CO₂ flux in marginal sea is an important component of the global ocean carbon cycle. Located between the East China Sea and the northern South China Sea shelves which are both CO₂ sinks, the southeastern coast of Mainland China has large potential of CO₂ sequestration, but studies on air-sea CO₂ fluxes in this region are very limited. Surface water CO₂ partial pressure (<em>p</em>CO₂) and auxiliary parameters from 51 cruises conducted in 2001–2022 were integrated to estimate the air-sea CO₂ fluxes. Surface water <em>p</em>CO₂ exhibited conspicuous spatial and temporal variabilities. The lowest <em>p</em>CO₂ occurred in winter (349 ± 20 μatm), gradually increased in spring (357 ± 21 μatm) and summer (371 ± 35 μatm), and reached a peak in fall (392 ± 27 μatm). Surface water <em>p</em>CO₂ was primarily modulated by vertical mixing and cooling during cold seasons, and by coastal upwelling and biological CO₂ uptake in warm seasons. Vertical water mixing and temperature effect induced highest <em>p</em>CO₂ in fall. Air-sea CO₂ fluxes also exhibited strong seasonal variations. The study area acts as a moderate to strong CO₂ sinks of 9.4 ± 5.5 and 3.7 ± 3.9 mmol m⁻² d^-1 in winter and spring, respectively, and a CO₂ source of 3.8 ± 7.0 mmol m⁻² d^-1 in fall. In summer, the surface water CO₂ is near equilibrium with the atmosphere with an air-sea CO₂ flux of −0.6 ± 2.8 mmol m⁻² d^-1. The annual average air-sea CO₂ fluxes is −2.6 ± 6.8 mmol m⁻² d^-1, indicating the study area acting as a weak to moderate sink annually. <em>p</em>CO₂ difference between the surface water and the atmosphere is the main factor regulating the seasonal variations of air-sea CO₂ flux, and wind speed also played an important role, enhancing CO₂ sink in winter.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"241 ","pages":"Article 103659"},"PeriodicalIF":3.6,"publicationDate":"2025-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145813737","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":"Diversity and connectivity of deep-sea Amphipoda of the Bering Sea and the Aleutian Trench revealed with DNA barcoding","authors":"Anna M. Jażdżewska ,&nbsp;Anne Helene S. Tandberg ,&nbsp;Wiktor Leszczyński","doi":"10.1016/j.pocean.2025.103655","DOIUrl":"10.1016/j.pocean.2025.103655","url":null,"abstract":"<div><div>Amphipoda are speciose and abundant in all marine habitats and are proven to be important food source for higher trophic levels. These crustaceans are brooders with no planktonic larval stage, so migration of species depend mainly on swimming capacities of adult animals.</div><div>The aims of the present work were: 1) characterizing the diversity of abyssal and hadal amphipods of the Bering Sea (BS) and the Aleutian Trench (AT), 2) studying the amphipod species distribution as well as 3) inferring the connectivity between North East Pacific amphipod fauna and the other deep-sea regions of the world ocean.</div><div>The material was collected with and epibenthic sledge from two stations in the South East BS, three stations on the northern slope of the AT, three stations on the southern slope of the AT and six stations in the hadal of the AT. A representation of all collected amphipods was initially sorted into families and preferably morphospecies and subjected to cytochrome <em>c</em> oxidase subunit I gene (COI) barcoding.</div><div>The barcoding of 575 individuals resulted in 460 sequences that were ascribed to 182 Molecular Operational Taxonomic Units (MOTUs). At least 25 families, 31 genera and six known species were identified. The families (or groups of families) that dominated barcoded material in terms of abundance were: Oedicerotidae (76 ind.), Eusiridae (75 ind.) and Lysianassoidea indet. (61 ind.), while the most speciose groups were: Lysianassoidea indet. (31 MOTUs), followed by Pardaliscidae (29 MOTUs) and Oedicerotidae (28 MOTUs). Almost three quarters of all MOTUs were singletons or doubletons, however as many as 46 MOTUs appeared to be shared with other regions of the World Ocean. The Bering Sea and both slopes of the trench appeared to harbour significantly higher number of amphipod MOTUs (51–61 MOTUs) than the hadal zone of the AT (33 MOTUs). The highest faunal exchange appeared to be between abyssal and hadal zones of the AT and similar depth zones of the Kuril-Kamchatka Trench (39 MOTUs), the second most connected region was the abyss of Clarion-Clipperton Zone (11 MOTUs). The BS fauna demonstrated high uniqueness with only four MOTUs shared with AT abyss and hadal as well as with four MOTUs shared with NW Pacific.</div><div>The study confirmed high species richness of another deep-sea region of the World, formerly almost completely unknown.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"242 ","pages":"Article 103655"},"PeriodicalIF":3.6,"publicationDate":"2025-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145785681","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":"Ecological and spatial factors shaping abyssal and hadal peracarid crustacean communities in the eastern Aleutian Trench (NE Pacific)","authors":"Davide Di Franco ,&nbsp;Stefanie Kaiser ,&nbsp;Andreas Kelch ,&nbsp;Mathis Preikschardt ,&nbsp;Magdalena Błażewicz ,&nbsp;Nils Brenke ,&nbsp;Sarah Gerken ,&nbsp;Kamila Głuchowska ,&nbsp;Karen Jeskulke ,&nbsp;Henry Knauber ,&nbsp;Katharina Kohlenbach ,&nbsp;Anne Helene S. Tandberg ,&nbsp;Anna Jażdżewska ,&nbsp;Angelika Brandt","doi":"10.1016/j.pocean.2025.103651","DOIUrl":"10.1016/j.pocean.2025.103651","url":null,"abstract":"<div><div>The abyssal and hadal deep sea, characterised by high pressures, low temperatures, and limited light availability, hosts a remarkable diversity of organisms that have adapted to these harsh conditions. Despite its vastness, the deep sea remains relatively unexplored, and our understanding of the factors governing its community composition, diversity, and abundance is still limited. In this study, we aim to elucidate the various factors that contribute to shaping deep-sea peracarid communities and provide insights into their ecological dynamics. Benthic material was collected during the AleutBio (SO293) expedition aboard the RV <em>Sonne</em> from July 24th to September 6th, 2022 in the Northeast Pacific Ocean. A total of 19 samples were collected with an epibenthic sledge at depths ranging from 3,517 to 7,254 m. In total, 5,400 peracarid specimens were collected, with amphipods and isopods being the most dominant groups, accounting for 35 % and 36 % (1,546 and 1,591 ind./1,000 m haul) respectively, followed by cumaceans and tanaidaceans, which each contributed 13 % of the total peracarid composition (584 and 556 ind./1,000 m). Hierarchical cluster analysis and non-metric multidimensional scaling (nMDS) revealed dissimilarity in the abundance patterns between hadal and abyssal stations, highlighting significant variation in assemblage structure. Further Redundancy Analysis (RDA), showed that depth was the primary environmental factor driving peracarid abundance across the stations. The results contribute valuable insights into the distribution patterns of peracarids in the Aleutian Trench region and underscores the need for further investigations into the role of environmental variables in structuring deep-sea communities.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"241 ","pages":"Article 103651"},"PeriodicalIF":3.6,"publicationDate":"2025-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145786139","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}