Journal of Marine Systems最新文献

{"title":"Abundance and diversity patterns and environmental drivers of Peracarida (Arthropoda, Crustacea) macrofauna from the deep sea of the southwestern Gulf of Mexico","authors":"Octavio Quintanar-Retama ,&nbsp;Ana Rosa Vázquez-Bader ,&nbsp;Adolfo Gracia","doi":"10.1016/j.jmarsys.2024.103977","DOIUrl":"https://doi.org/10.1016/j.jmarsys.2024.103977","url":null,"abstract":"<div><p>We present unique data of abundance, spatial diversity, and bathymetric patterns of the Peracarida communities of the economic and ecological important scarce studied area of the southern Gulf of Mexico. Peracarida macrofauna was collected from 63 sites in a large geographical area (92.67°– 96.70° W, 18.74°–23.04° N) with a wide bathymetric gradient (185–3740 m depth) of the deep-sea southwestern Gulf of Mexico. The samples were obtained onboard the R/V Justo Sierra (Universidad Nacional Autónoma de México, UNAM) using a Reineck-type box corer during four oceanographic cruises (SOGOM 1–4; 2015–2018). We examined the bathymetric and spatial patterns of standardized abundance (ind. m^-2) and taxonomic diversity (Hill numbers, q = 0, 1, and 2). Abundance patterns were related to environmental parameters (organic matter, aromatic and aliphatic hydrocarbons, bottom water temperature, dissolved oxygen and grain composition). We collected 684 specimens belonging to 53 Peracarida families of 4 orders (Amphipoda, 19; Isopoda, 17; Tanaidacea, 13; and Cumacea, 4). The most abundant orders were Amphipoda and Tanaidacea, representing 36.4% and 35.8% of the total abundance, respectively, followed by Isopoda (25.1%). Cumacea was the least abundant order (2.7%). The top ten abundant families in order were Apseudidae, Phoxocephalidae, Caprellidae, Desmosomatidae, Nototanaidae, Nannoniscidae, Tanaellidae, Ischnomesidae, Podoceridae, and Agathotanaidae, accounting for 66% of the total relative abundance. The abundance decreased with increasing depth. Highest values were recorded in the northwestern region of the study area and in the Campeche Bay salt domes zone, whereas the lowest abundance values were registered at the abyssal locations and in some sites located in the Coatzacoalcos and Campeche Canyons. The composition and structure of the peracarid community showed shifts related to depth. The major structural abiotic factors of the Peracarida community were: latitude, depth, temperature, and sediment aliphatic hydrocarbons. The diversity based on the three estimated Hill numbers consistently decreased with increasing depth. We recorded intermediate and low diversity values in almost the entire study area, except for the Campeche Bay salt domes zone and northwestern region, where intermediate and high diversity values were registered.</p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0924796324000150/pdfft?md5=4c8c47bd81bad0ee6518dbbc9d058969&pid=1-s2.0-S0924796324000150-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140344258","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":"Characterization of pelagic communities in the Pacific sector of the Arctic Ocean using a broadband acoustic system, net samplers, and optical instruments","authors":"Myounghee Kang ,&nbsp;Aldwin Adrianus ,&nbsp;Kyoung-Ho Cho ,&nbsp;Jee-Hoon Kim ,&nbsp;Wuju Son ,&nbsp;Jaeill Yoo ,&nbsp;Eun Jin Yang ,&nbsp;Hyoung Sul La","doi":"10.1016/j.jmarsys.2024.103976","DOIUrl":"10.1016/j.jmarsys.2024.103976","url":null,"abstract":"<div><p>Rising Arctic temperatures are causing substantial declines in sea ice, altering ice retreat and formation in the Pacific Arctic and impacting marine communities. Despite the significant challenges facing the Pacific Arctic, there are still gaps in our understanding of the environmental impacts on pelagic communities, particularly sound scattering layers (SSLs), and their distributions in the southern Chukchi Sea (SCS), northern Chukchi Sea (NCS), and East Siberian Sea (ESS). This study utilized a wideband autonomous transceiver, net samplers, and optical instruments to explore SSLs in the Pacific Arctic, detailing their relationships with hydrographic properties. The findings indicated a greater vertical distribution of pelagic communities in the SCS than in the NCS and ESS. Significant differences in frequency spectra patterns were observed between the SCS and both the NCS and the ESS, though not between the NCS and the ESS. The correlations between the broadband acoustic and hydrographic values were generally weak to moderate. Elevated acoustic values in the SCS were linked to higher water temperature, dissolved oxygen, and chlorophyll and lower salinity. This study also revealed the behavioral properties of individual pelagic animals and identified Ctenophores and Copepods as the most abundant classes based on camera images and net samples. This research offers crucial insights into the distribution and interactions of pelagic communities with environmental factors, laying the groundwork for understanding climate change impacts. Additionally, this paper presents the first findings of frequency spectra from a broadband system in the Arctic Ocean.</p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140406122","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":"Insights into the pelagic ciliate community in the Bering Sea: Carbon stock, driving factors and indicator function for climate change","authors":"Chaofeng Wang ,&nbsp;Zhimeng Xu ,&nbsp;Xiaoyu Wang ,&nbsp;Yan He ,&nbsp;Zhiqiang Xu ,&nbsp;Guangfu Luo ,&nbsp;Haibo Li ,&nbsp;Xinhua Chen ,&nbsp;Wuchang Zhang","doi":"10.1016/j.jmarsys.2024.103975","DOIUrl":"https://doi.org/10.1016/j.jmarsys.2024.103975","url":null,"abstract":"<div><p>Microzooplankton carbon stock and its biotic-abiotic interactions are important linkage in marine carbon biogeochemistry, which remain poorly documented in the Bering Sea. In the summer of 2019, we investigated the community structure of pelagic ciliates from the surface to bottom (or up to 200 m) in the Bering Sea. High abundance and biomass of ciliate occurred mainly in waters shallower than 50 m. The average carbon stock of ciliates were 350.0 ± 96.4 mg C m⁻² and 218.4 ± 148.8 mg C m⁻² in oceanic and shelf regimes, respectively. Aloricate ciliates were the dominant group, with an average abundance proportion to total ciliates of over 80% at each depth. We identified 45 tintinnid species belonging to 15 genera, including 7 new record species in the Bering Sea. The abundance proportion of their lorica oral diameter (LOD) size-classes at each sampling depth was mainly within the fractions of 12–16 μm and 24–28 μm. Furthermore, both <em>Codonellopsis frigida</em> and <em>Parafavella jorgenseni</em> can act indicator species of Pacific inflows based on their distributions. Strong correlations were reflected between abiotic environmental factors and the distribution of these indicator species, for instance, the positive correlation between salinity and the cold water-adapted species <em>C. frigida,</em> confirming the dominant role of bottom-control on the ecosystem. Our study laid a foundation for deep understanding of ciliate community at summertime of the Bering Sea, and its role in driving biogeochemical fluxes.</p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140138951","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":"Dissolved carbohydrates and its influence on bacterioplankton diversity in the euphotic zone of Equatorial Indian Ocean during southwest monsoon","authors":"Bhaskar V. Parli ,&nbsp;Alok K. Sinha ,&nbsp;Jane T. Bhaskar","doi":"10.1016/j.jmarsys.2024.103974","DOIUrl":"10.1016/j.jmarsys.2024.103974","url":null,"abstract":"<div><p>The Equatorial Indian Ocean (EIO) is oligotrophic in nature, low in productivity and characterised by relatively high bacterial biomass and heterotrophic productivity. The microbial biomass is fuelled by dissolved organic carbon (DOC) whose lability depends upon its chemistry. During an expedition in the EIO, samples for dissolved carbohydrates (DCHO), dissolved monosaccharide (MCHO), dissolved polysaccharide (PCHO), total bacterial abundance, total organic carbon (TOC), nutrients, chlorophyll <em>a</em> (chl <em>a</em>), bacterial diversity, and phytoplankton composition were estimated along two transects (TS-1 &amp; TS-2) in the euphotic depth (200 m). DCHO and MCHO samples were analysed using 3-methyl-2-benzothiozolinone hydrazone hydrochloride (MBTH) method. The DCHO, MCHO, and PCHO concentrations in TS-1 ranged from 2.4 to 5.8 μM; 0.7 to 2.7 μM; 0.7 to 3.4 μM, while in TS-2 it ranged from 2.2 to 4.8 μM; 0.3 to 2.8 μM; 0.2 to 3.8 μM, respectively. Vertically, DCHO concentrations decreased within the photic depths in most stations. PCHO concentrations were relatively greater in TS-2 than TS-1, which may be due to preferential removal of MCHO in TS-2. In the top 200 m of the water column, <em>Proteobacteria</em> was the most abundant bacterial phylum followed by <em>Cyanobacteria</em>, <em>Actinobacteriota</em>, <em>Bacteroidota</em>, and SAR-324 while dinoflagellates dominated the phytoplankton population. The distribution of DCHO and PCHO were inversely correlated to salinity, temperature, and chl <em>a</em>. The bacterial heterotrophs like <em>alpha</em>-<em>Proteobacteria, Chloroflexii,</em> and <em>Verrumicrobiota</em> along with SAR324 and <em>Actinobacteriota</em> were clustered with nutrients, while <em>Bdellovibriota</em> and <em>Dadabacteria</em> clustered with MCHO, PCHO, and DCHO. These results highlight the impact of DCHO &amp; PCHO lability on the distribution of bacterial community and delineate oceanographic factors that regulate the distribution of DCHO and its constituents in EIO waters.</p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140100046","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":"Marine community trophic structure of Malpelo Island, Colombia from stable isotopes approach","authors":"Colombo Estupiñán-Montaño ,&nbsp;Carlos J. Polo-Silva ,&nbsp;Fernando R. Elorriaga-Verplancken ,&nbsp;Alberto Sánchez-González ,&nbsp;Manuel J. Zetina-Rejón ,&nbsp;Antonio Delgado-Huertas ,&nbsp;Jaiver Rojas-Cundumí ,&nbsp;Felipe Galván-Magaña","doi":"10.1016/j.jmarsys.2024.103973","DOIUrl":"10.1016/j.jmarsys.2024.103973","url":null,"abstract":"<div><p>Expanding knowledge of the trophodynamic of ecosystems improves the understanding of energy flow and interactions formed in food webs; therefore, structural knowledge of food webs helps to understand the ecosystem dynamics. This study describes the marine trophic structure of the largest marine protected area (MPA) of the Colombian Pacific in Malpelo Island, using δ¹³C and δ¹⁵N. A total of 293 (38 groups/families) samples were collected and analyzed, being mostly represented by teleosts, followed by crustaceans, elasmobranchs, zooplankton, seabirds, and others functional groups. The marine isospace was between −21.5‰ and − 10.0‰ for δ¹³C and between 4.6‰ to 16.9‰ in δ¹⁵N. The Malpelo Island marine ecosystem showed a food web composed of five trophic levels (TLs): TL-I (primary producers), TL-II (herbivores), TL-III (primary carnivores), TL-IV (secondary carnivores), and TL-V (tertiary carnivores), along with three intermediate TLs (TLs II-III, III-IV, and IV-V). The isotopic diversity index showed global low values of uniqueness (<em>IUni</em>) (0–0.349), intermediate values of <em>IRic</em>_Global, and <em>IDis</em>_Global (0.350–0.640), and high values of <em>IDiv</em>_Global, and <em>IEve</em>_Global (0.650–1). TLs reflected high trophic interaction indices as a result of multifunctionality (12 feeding mechanisms) and possible ontogenetic changes of organisms in this ecosystem. This study includes the first insights into the marine trophic structure of the Malpelo Island and indicate some functional aspects of the entities that inhabit this ecosystem. This study fill information gaps for the MPA and constitute an important tool to improve the elaboration of management and conservation measures based on the knowledge of the ecosystem function.</p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139919540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The influence of the cape canyon on the food web structure of the southern Benguela upwelling system","authors":"Eleonora Puccinelli ,&nbsp;Zoleka Filander ,&nbsp;Tarron Lamont","doi":"10.1016/j.jmarsys.2024.103965","DOIUrl":"10.1016/j.jmarsys.2024.103965","url":null,"abstract":"<div><p>Submarine canyons are heterogeneous environments known to support a variety of benthic organisms and they are considered biodiversity hotspots. The peculiar hydrographic conditions that characterize these systems, including the high level of organic matter accumulation and transport, can lead to intense resuspension that can influence the food available to the benthos. The Cape Canyon is the largest South African canyon located off the western margin of the country. It has a unique structure that connects the coastline to deep-sea environments, and it is also extremely productive being under the influence of upwelling. Here we aim to characterize the role of hydrography in influencing the food availability to the benthos, comparing stations within the Cape Canyon and from adjacent areas. Samples were collected in March 2017 and data were acquired to describe the physical environment (temperature, salinity, oxygen) in relation to the benthic invertebrate specimens used for stable isotope analyses. The δ¹⁵N of suspended particulate matter (SPM) did not vary between canyon and non-canyon regions, but it increased with depth, most likely as the result of particle bacterial remineralization. In contrast, the δ¹³C_SPM changed as a function of canyon. Such effects were only partially reflected in the δ¹⁵N and δ¹³C of the trophic groups identified, which generally did not vary between canyon and non-canyon stations. This information increases our understanding of the ecological function of the benthos in and around the Cape Canyon, which is essential for the ongoing marine spatial planning efforts.</p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0924796324000034/pdfft?md5=c0399f506d246f3008708c4b211e5df0&pid=1-s2.0-S0924796324000034-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139891852","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":"The influence of the cape canyon on the food web structure of the southern Benguela upwelling system","authors":"Eleonora Puccinelli, Zoleka N Filander, Tarron Lamont","doi":"10.1016/j.jmarsys.2024.103965","DOIUrl":"https://doi.org/10.1016/j.jmarsys.2024.103965","url":null,"abstract":"","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139831906","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":"Influences of tides on shelf circulation in the northeastern South China Sea during summer","authors":"Bingxu Geng ,&nbsp;Yeqiang Shu ,&nbsp;Jiatang Hu ,&nbsp;Shiyu Li ,&nbsp;Na Liu ,&nbsp;Peng Xiu ,&nbsp;Dongxiao Wang","doi":"10.1016/j.jmarsys.2024.103964","DOIUrl":"10.1016/j.jmarsys.2024.103964","url":null,"abstract":"<div><p><span><span>Tides have significant effects on material and energy transports over the continental shelf. A mooring system located in the shelf region of the northeastern South China Sea observed strong and weak mean currents during the spring and neap tides in summer, respectively. The mechanism leading to this difference is investigated by using a three-dimensional circulation model. We find that the impact of tides (TI) on currents exhibited as current components opposing wind-driven circulation play an important role. The TI current components are stronger than the tidal residual currents in summer when vertical stratification enhances the tidal </span>rectification<span>. Tides can affect pressure gradient<span> by modifying sea surface height on the shelf, while in shallow and shelf break regions, the non-linear </span></span></span>advection<span><span> and vertical diffusion become significant in momentum equations attributable to the interactions of tidal currents, </span>bottom topography and water column stratification. Consequently, the along-shelf volume transport is reduced by about 21.6% due to the TI current components and only by about 6.1% due to the tidal residual currents. This study highlights the importance of both tidal mixing and tidal rectification in regulating shelf circulation in the northeastern South China Sea.</span></p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139559746","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":"Vertical variations of bacterial growth, mortality loss to nanoflagellates, and viruses in the subtropical northwestern Pacific Ocean","authors":"Feng-Hsun Chang ,&nbsp;Gwo-Ching Gong ,&nbsp;Chih-hao Hsieh ,&nbsp;Patrichka Wei-Yi Chen ,&nbsp;Vladimir Mukhanov ,&nbsp;An-Yi Tsai","doi":"10.1016/j.jmarsys.2024.103963","DOIUrl":"10.1016/j.jmarsys.2024.103963","url":null,"abstract":"<div><p><span><span>Nanoflagellate grazing and viral lysis are the two main causes of mortality losses of marine bacterioplankton. Deciphering the mortality losses across the water column helps us understand their ecological and biogeochemical consequences. In this study, we implemented the two-point modified dilution method consisting of treatment of undiluted and 25% nanoflagellates and/or virus density at the surface (3 m), deep chlorophyll maximum (DCM), and the </span>mesopelagic zone (300 m and 500 m deep) in the subtropical northwestern Pacific Ocean in summer. We found that the bacterial per capita growth (2.3 ± 0.6 d</span>⁻¹) and production (12.4 ± 6.9 μgC L⁻¹ d⁻¹<span><span>) were significantly higher at the DCM layer than at the mesopelagic zone, possibly because of tight bacteria-phytoplankton coupling and trophic interactions between bacteria, nanoflagellates, and viruses. Further, we found that ∼70% of the bacterial mortality loss can be attributed to nanoflagellate grazing in the DCM layer, while most of the mortality loss in the surface and the mesopelagic zone can be attributed to viral lysis. We argue that while bacterial production is more efficiently transferred to higher </span>trophic levels<span> at the DCM layer, it is predominately recycled in the viral loop on the surface and the mesopelagic zone. Our results reveal the vertical variation of bacterial growth, production, mortality loss to nanoflagellate grazing, and viral lysis, from which we could deduct their depth-dependent impacts on carbon flux in the water column. Our study facilitates the understanding of the impacts of nanoflagellates and viruses on bacterioplankton and the bacteria-mediated biogeochemical cycling.</span></span></p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139559778","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":"Marine heatwaves and global warming impacts on winter waters in the Southern Indian Ocean","authors":"Clara Azarian ,&nbsp;Laurent Bopp ,&nbsp;Jean-Baptiste Sallée ,&nbsp;Sebastiaan Swart ,&nbsp;Christophe Guinet ,&nbsp;Francesco d'Ovidio","doi":"10.1016/j.jmarsys.2023.103962","DOIUrl":"10.1016/j.jmarsys.2023.103962","url":null,"abstract":"<div><p><span><span><span>In the Southern Ocean, the term “winter waters” (WWs) refers to a </span>water mass characterized by a subsurface layer of minimum temperature that plays an important ecological role for </span>marine ecosystems, and in particular for top predators. Given that the Southern Ocean is experiencing warming and intense marine heatwaves (MHWs), particularly at subantarctic latitudes, we investigate here how different levels of warming might impact the presence, depth and minimum temperature of WWs in the Indian sector of the Southern Ocean. In particular, we assess how WWs are impacted by surface MHWs using </span><em>in situ</em><span> Argo hydrographic observations and biologging data. The results indicate that WWs are substantially reduced, deeper and warmer during the presence of MHWs. Using the most recent climate projections, we find a significant, but scenario-dependent, southward shift of WWs under global warming<span>. Potential impacts of such WW shifts on pelagic ecosystems, at different timescales (from daily to decadal), are discussed.</span></span></p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2023-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139062950","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}