Journal of Marine Systems最新文献

{"title":"Mesoscale and climate environmental variability drive krill community changes in the Humboldt Current System","authors":"Macarena Díaz-Astudillo ,&nbsp;Ramiro Riquelme-Bugueño ,&nbsp;Gonzalo S. Saldías ,&nbsp;Jaime Letelier","doi":"10.1016/j.jmarsys.2024.103998","DOIUrl":"10.1016/j.jmarsys.2024.103998","url":null,"abstract":"<div><p>Euphausiids (or “krill”) play a crucial role in the food webs of eastern boundary upwelling systems. Their inter-specific predatory interactions with ecologically and commercially important species highlights the importance of understanding krill variability at different temporal and spatial scales. In the Humboldt Current System (HCS), few studies have addressed the spatio-temporal variability of krill communities and their link with climate and local environmental drivers. We studied the patterns and variability of euphausiid diversity in the coastal area off northern Chile, using zooplankton and CTD-O data, and satellite environmental data from the falls and springs of 2010–2017. The community showed low diversity and evenness, with the endemic species <em>Euphausia mucronata</em> being the most abundant. The environmental variance showed 2 main modes of variability: (1) upwelling-associated changes in the depth of the oxygen minimum zone (OMZ) and in temperature, and (2) interannual variability in salinity, associated with ENSO-driven water-mass changes. The diversity indices and community structure showed large fluctuations in the cross-shore direction, and with latitude. The general pattern showed higher diversity offshore and southward, with few species in the low temperature, shallow OMZ conditions of the coastal band. During the 2013 and 2016 marine heatwaves and the 2015-2016 El Niño, the Subtropical Water Mass was advected southward, causing an increase in salinity and temperature, and a decrease in total krill abundance. However, ENSO variability did not significantly affect the species composition. The changes in community structure were caused by fluctuations in species abundance rather than species presence, as the most abundant species dominated the community throughout the study period. These results indicate that the krill communities of the HCS are highly resilient to climate perturbations, with upwelling-associated gradients being the primary source of variability for euphausiid populations in this ecosystem.</p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"245 ","pages":"Article 103998"},"PeriodicalIF":2.7,"publicationDate":"2024-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141403269","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":"Freshwater discharge drives latitudinal changes of phytoplankton composition on the continental shelf off Chilean Patagonia","authors":"Julio Poblete-Ulloa ,&nbsp;Marcelo H. Gutiérrez ,&nbsp;Carina B. Lange ,&nbsp;Diego A. Narváez ,&nbsp;Paulina Montero ,&nbsp;Humberto E. González ,&nbsp;Camila Fernández","doi":"10.1016/j.jmarsys.2024.103993","DOIUrl":"10.1016/j.jmarsys.2024.103993","url":null,"abstract":"<div><p>A high-resolution survey of distribution, abundance and composition of phytoplankton was carried out for the first time in surface waters of the continental shelf off Chilean Patagonia (41–48°S). An Imaging FlowCytobot was used along the survey track to record phytoplankton in the size range of 10–120 μm during the austral spring of 2018. Phytoplankton community structure was complemented with continuous underway measurements of temperature and salinity, and physicochemical parameters of the water column at 35 oceanographic stations. Our results evidenced two main macrozones with distinctive phytoplankton assemblages delimited latitudinally at ~45°S. The northern macrozone was characterized by higher surface temperature and salinity, Si:N ratio &gt; 1, diatoms of the genera <em>Thalassiosira</em> and <em>Chaetoceros</em>, and dinoflagellates accounting for over 70% of the total abundance. The southern macrozone, with lower surface temperature and salinity and Si:N ratio &lt; 1, was characterized by members of the genera <em>Guinardia</em>, <em>Lauderia</em> and <em>Cerataulina</em>, representing over 60% of the total phytoplankton. These changes were attributable to the strong influence of freshwater at latitudes higher than 45°S and the enhanced discharge of meltwaters from Patagonian icefields in the area of the Taitao Peninsula and the Gulf of Penas (47–-48°S). Fresh and cold waters impacted the water column stratification and the availability of dissolved silicic acid with potential effects on phytoplankton composition and diatom cell silicification and, thus, on carbon exportation. Our estimations of phytoplankton carbon were comparable to those observed in Patagonian fjords and the highly productive upwelling ecosystem of central Chile. We suggest that the continental shelf off Patagonia can contribute significantly to strengthen the biological carbon pump through the synthesis, exportation, and sequestration of phytoplankton-based organic carbon in the southeastern Pacific Ocean.</p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"245 ","pages":"Article 103993"},"PeriodicalIF":2.8,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141412059","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":"Spatiotemporal variations in the grain size distribution in the water column and sediments from the Yellow River Delta to distal areas under coastal currents","authors":"Lijian Yang ,&nbsp;Xiaochuan Ma ,&nbsp;Yiwei He ,&nbsp;Min Gao ,&nbsp;Jie Huang ,&nbsp;Jian Lu ,&nbsp;Zhendong Luan","doi":"10.1016/j.jmarsys.2024.103997","DOIUrl":"https://doi.org/10.1016/j.jmarsys.2024.103997","url":null,"abstract":"<div><p>The differentiation of sediment grain size from large river deltas to distal areas in a coastal flow system and its evolution are vital because they greatly contribute to matter transport, pollution accumulation, and carbon cycling on the inner shelf. Here, the Yellow River sedimentary system in the adjacent seas is studied, including the proximal delta of the Yellow River and the distal mud patch. The grain size distributions of the suspended particulate matter (SPM), surface sediments, and core sediments in the Shandong Peninsula Coastal Current (SPCC) system were integrated and analyzed. The results show that apparent variations in the grain size distribution exist in the SPM and sediments in the SPCC system. The grain size distribution of the SPM near the proximal delta of the Yellow River is multimodal and variable with water depth, whereas that in the distal mud area is typically unimodal. The coarse-grained endmember of suspended sediments is restricted in the proximal area by ocean fronts under fair weather conditions in both summer and winter and is only transported to the distal mud area under strengthened coastal currents in winter. In contrast, fine-grained endmembers can be transported far away under tidal currents and coastal currents year-round. The temporal grain size variation near the proximal delta is also significantly affected by historical shifts in the Yellow River mouth, while the strength of coastal currents associated with the East Asian Winter Monsoon (EAWM) controls the grain size distribution in the distal mud area. The roles of river behaviors, ocean fronts, tides, and winds are all highlighted in the control of grain size differentiation. These results potentially have significance for understanding sediment dynamics and mass transport processes in similar coastal current systems involving large rivers worldwide.</p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"245 ","pages":"Article 103997"},"PeriodicalIF":2.8,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141290069","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":"Investigating Labrador Sea's persistent surface O2 anomaly using observations and biogeochemical model results","authors":"Amavi N. Silva ,&nbsp;Duncan A. Purdie ,&nbsp;Nicholas R. Bates ,&nbsp;Toby Tyrrell","doi":"10.1016/j.jmarsys.2024.103996","DOIUrl":"https://doi.org/10.1016/j.jmarsys.2024.103996","url":null,"abstract":"<div><p>Deviations of surface ocean dissolved oxygen (O₂) from equilibrium with the atmosphere should be rectified about twenty times more quickly than deviations of dissolved carbon dioxide (CO₂). Therefore, persistent O₂ disequilibria in the Labrador Sea, while CO₂ is close to equilibrium, has been a matter of interest to many previous works. Here we investigate this phenomenon by using a novel analytical technique, the ‘CORS (Carbon Dioxide and Oxygen Relative to Saturation) method’, and also by using more data than was available previously. We compare observations to results from a model we developed for the Labrador Sea which combines plankton ecology with biogeochemical cycling of oxygen, carbon and nitrogen. In contrast to earlier works which mostly considered individual factors in isolation, here we used the model, together with data, to distinguish between the varying influences of several processes potentially contributing to the long-lasting O₂ undersaturation: mixed layer depth, duration of mixed layer deepening, convection, entrainment and bottom water O₂ content. Our model experiments confirm that, for the same gas exchange rate, the effects on surface O₂ concentration differ significantly among the identified drivers. Our results suggest that prolonged surface O₂ undersaturation is not always dependent on the extreme winter mixed layer depths, but rather that even moderately deep mixed layers (e.g. 300 m), when prolonged and in conjunction with continuous entrainment of oxygen-depleted deep water, can also drive persistent surface O₂ anomalies. An implication of our results is that regions in the North Atlantic with maximum winter mixed layer depths of only a few hundred metres should also show persistent surface O₂ undersaturation. We further reveal that convection in deep water formation regions produces trendlines that do not pass through the origin of a plot of CO₂ vs. O₂ deviations which have previously been thought to indicate erroneous data.</p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"245 ","pages":"Article 103996"},"PeriodicalIF":2.8,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0924796324000344/pdfft?md5=3ab28f80ed74e5e6bde616b23c18602e&pid=1-s2.0-S0924796324000344-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141303727","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":"A mechanism of enhanced subsurface near-inertial kinetic energy in the East China Sea associated with successive typhoons","authors":"Yang Li ,&nbsp;Zhao Xu ,&nbsp;Jie Shi ,&nbsp;Xiaohui Ma ,&nbsp;Jishang Xu","doi":"10.1016/j.jmarsys.2024.103995","DOIUrl":"10.1016/j.jmarsys.2024.103995","url":null,"abstract":"<div><p>Near-inertial waves (NIWs) play an important role in diapycnal processes and energy dissipation. A mooring observation deployed on the continental shelf in the East China Sea captured anomalously intensified subsurface near-inertial kinetic energy (NIKE) during the passage of Typhoon Danas (2013). An early study has investigated the role of Parametric Subharmonic Instability (PSI) induced by internal tides in the intensification of the subsurface intensified near-inertial velocity. However, results based on regional numerical simulations reveal that strong subsurface near-inertial velocity persists even in the absence of tidal effects, implying the existence of additional sources of NIWs. Our analyses showed that after excluding the effect of PSI, approximately 30% of the remaining subsurface NIKE can be attributed to another Typhoon Fitow (2013), which occurred a week prior to Typhoon Danas. Constrained by the Kuroshio current and the continental shelf, the NIKE generated by Typhoon Fitow propagates northward and reaches the mooring location, leading to the intensified subsurface NIW signal. Our simulation, together with the observations, suggests complicated NIW dynamics in continental shelf regions, involving interactions between successive typhoons, topography and background current, and differing from the open ocean. These interactions will further influence vertical mixing on the continental shelf along the pathway of NIW.</p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"245 ","pages":"Article 103995"},"PeriodicalIF":2.8,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141274258","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 environmental variability in Northern Patagonia (Southwestern Atlantic Ocean) as recorded in Glycymeris longior shells","authors":"M.S. Doldan ,&nbsp;P.C. Zaidman ,&nbsp;G.N. Williams ,&nbsp;L.H. Gimenez ,&nbsp;E.M. Morsan","doi":"10.1016/j.jmarsys.2024.103991","DOIUrl":"10.1016/j.jmarsys.2024.103991","url":null,"abstract":"<div><p>Certain marine regions in the world lack long instrumental records of environmental variables or such records are incomplete. This deficiency particularly applies to Argentine Patagonia, where existing instrumental records span only the last few decades. In the present study it was explored whether such data can be reconstructed from a natural archive, specifically shells of the bivalve mollusk <em>Glycymeris longior</em> from the San Matías Gulf, north Patagonia. For this purpose, a multidecade-long time-series was constructed using variations in the annual shell growth. The time-series spans from 1890 to 2020 and is based on shells from museum collections (live-collected from 1918, 1933 and 1945) and from scientific surveys conducted between 1989 and 2021. An analysis of the links between environmental variables and shell growth was performed between 1976 and 2020 (expressed population signal &gt;0.85). The common signal among the growth curves of individual specimens of <em>G. longior</em> suggests that the growth is influenced by environmental parameters. However, the growth of <em>G. longior</em> did not show significant correlations with the low- nor with the high-frequency components of SST and food supply (chlorophyll-a concentration and POC), suggesting that these parameters do not limit shell growth at the studied site or were undetected with our analyses. The chronology also seems to be insensitive to regional climate patterns such as the Southern Annular Mode. The chronology has the potential for being expanded spatially and temporally.</p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"245 ","pages":"Article 103991"},"PeriodicalIF":2.8,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141278596","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":"Decadal trends and dynamics in the abundance and biomass of marine branchiopods in the southern part of the North Sea","authors":"Ilias Semmouri ,&nbsp;Jonas Mortelmans ,&nbsp;Charlie Roland ,&nbsp;Colin R. Janssen ,&nbsp;Jana Asselman","doi":"10.1016/j.jmarsys.2024.103992","DOIUrl":"https://doi.org/10.1016/j.jmarsys.2024.103992","url":null,"abstract":"<div><p>Time-series are fundamental for enhancing our comprehension of plankton community dynamics and forecasting future changes that could significantly affect entire marine food chains and ecosystems. In this study, we investigated spatial and temporal variations in occurrence, abundance and body size of marine branchiopods in the Belgian Part of the North Sea (BPNS), using both traditional microscopy, as well as digital imaging (ZooSCAN). We studied the population dynamics of branchiopods collected between 2014 and 2021 in the BPNS and compared these results with a previously collected (2009–2010) dataset for the same area. The time series showed no significant changes in abundance (<em>Podon</em> spp., <em>Evadne nordmanni</em>) over the years, but we did observe a pronounced seasonal pattern, with both species completely absent in the winter months. Abundance and biomass were positively correlated with water temperature but negatively correlated with nutrient concentrations and turbidity. Additionally, <em>Podon</em> spp. abundance was negatively correlated with anthropogenic chemicals (i.e., polycyclic aromatic hydrocarbons). We employed generalized additive models to quantify the relative contribution of temperature, salinity, turbidity, chlorophyll <em>a</em> concentration and pollutant levels to the dynamics of the studied taxa. Turbidity and chlorophyll <em>a</em> concentrations were revealed to be the predictor with the highest importance in all models predicting the abundances/body size of the selected species. Anthropogenic chemicals were not informative in explaining branchiopod abundance or body size. The findings of this study establish a baseline for future studies, which is essential for our understanding of the zooplankton dynamics in the North Sea, particularly in the context of climate change and changing water quality.</p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"245 ","pages":"Article 103992"},"PeriodicalIF":2.8,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141264247","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":"Distributions, sea-to-air fluxes, and biological consumption of carbon monoxide in the Bohai and Yellow Seas during winter","authors":"Lin Yang ,&nbsp;Jiayu Chen ,&nbsp;Jing Zhang ,&nbsp;Gui-Peng Yang ,&nbsp;Bin Yang","doi":"10.1016/j.jmarsys.2024.103994","DOIUrl":"10.1016/j.jmarsys.2024.103994","url":null,"abstract":"<div><p>Carbon monoxide (CO) concentrations in the atmosphere and ocean are mainly influenced by anthropogenic inputs, abiotic photoproduction, biogenic sources, and bacterial consumption. This study, for the first time, investigated the distributions, sea-to-air fluxes, and microbial consumption rates of CO in the Bohai Sea (BS) and the Yellow Sea (YS) in winter to identify the main factors controlling CO distributions in both the atmosphere and seawater in colder temperature. Atmospheric CO mixing ratios ([CO]_atm) and the concentrations of CO in surface seawater ([CO]_surf) ranged from 176.8 to 1245.8 ppbv (mean value: 551.4 ± 214 ppbv) and from 0.49 to 3.1 nmol L⁻¹ (mean value: 0.98 ± 0.55 nmol L⁻¹), respectively. In addition, the spatial distribution of [CO]_atm and [CO]_surf showed that anthropogenic sources dominated the distribution of [CO]_atm, but abiotic photoproduction processes were the main influencers of the distribution of [CO]_surf. The surface water at most sampling stations was supersaturated with CO, with a mean saturation factor of 1.9, and the sea-to-air fluxes of CO were estimated to range from −13.88 to 123.88 nmol m⁻² h⁻¹ (12.59 ± 21.32 nmol m⁻² h⁻¹), suggesting that the BS and the YS were the source of atmospheric CO, <!--> <!-->and were estimated to contribute 0.009% to 1.4% to the global ocean emission. Microbial consumption experiments indicated that the microbial CO consumption rate constants (<em>K</em>_bio) ranged from 0.15 to 2.14 h⁻¹, and showed that CO concentrations decreased exponentially with incubation time, suggesting that anaerobic CO consumption would limit CO accumulation in winter, thereby affecting the flux of [CO]_surf to [CO]_atm.</p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"245 ","pages":"Article 103994"},"PeriodicalIF":2.8,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141281804","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 Fujiwhara effect on ocean biophysical variables in the southeastern tropical Indian Ocean region","authors":"Riza Yuliratno Setiawan ,&nbsp;R. Dwi Susanto ,&nbsp;Takanori Horii ,&nbsp;Inovasita Alifdini ,&nbsp;Eko Siswanto ,&nbsp;Qurnia Wulan Sari ,&nbsp;Anindya Wirasatriya ,&nbsp;Candra Aryudiawan","doi":"10.1016/j.jmarsys.2024.103990","DOIUrl":"https://doi.org/10.1016/j.jmarsys.2024.103990","url":null,"abstract":"<div><p>A rare event known as Fujiwhara effect occurred in the southeastern tropical Indian Ocean when tropical cyclones (TCs) Seroja and Odette were co-existed, interacted each other, and merged into one TC in April 2021. Here, remotely sensed data (surface winds, sea surface temperature, chlorophyll-a concentration, and surface currents) were analyzed to determine the impact of Fujiwhara effect on the ocean biophysical variables in the region. Ekman pumping velocity were computed to determine the upwelling/downwelling process. During the entire development of the TCs to the merging, the TCs induced sea surface temperature (SST) cooling and raising sea surface chlorophyll-a. Ekman pumping and inertial pumping may serve as the primary driving force for the observed negative SST anomaly and positive anomaly in chl-a concentration associated with TCs. This rare event adds the complexity of ocean and climate dynamics of the region as an exit gate of the Indonesian throughflow to the Indian Ocean and may have implications to circulation and climate in the Indian Ocean and beyond. The present research likely represents the first scientific documentation of oceanic responses to a Fujiwhara effect in the region.</p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"245 ","pages":"Article 103990"},"PeriodicalIF":2.8,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141241373","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":"Extraction and interannual variation analysis of algal bloom-prone zones in the adjacent waters of the Yangtze River Estuary in summer based on GOCI data","authors":"Kexin Zhao ,&nbsp;Qian Zhao ,&nbsp;Hu Li ,&nbsp;Yanbin Xi","doi":"10.1016/j.jmarsys.2024.103989","DOIUrl":"https://doi.org/10.1016/j.jmarsys.2024.103989","url":null,"abstract":"<div><p>Harmful algal blooms (HABs) frequently threaten the health of marine environments and ecosystems in the adjacent waters of the Yangtze River Estuary (YRE) in summer. To better understand the spatiotemporal distribution, variation characteristics, and major influencing factors of algal bloom-prone zones in the adjacent waters of the YRE in summer, the present study used Geostationary Ocean Color Imager (GOCI) chlorophyll-a (Chl-a) data from 2011 to 2020. The Chl-a concentration threshold for summer algal blooms in the adjacent waters of the YRE was determined to be 16 mg/m³, based on which the monthly and interannual distribution characteristics of algal blooms were further clarified, and the influence of runoff and sea surface temperature (SST) on algal blooms was analyzed. The results showed that the area of the algal bloom-prone zones was the largest in July, at 1337 km², which was approximately 2.8-fold greater than that in June (474 km²) and 1.3-fold greater than that in August (1028 km²); the algal bloom-prone zones were mainly distributed in the eastern sea area of the YRE, and the spatial distribution of the algal blooms showed significant interannual variation. In 2020, the distribution range of the algal bloom-prone zones was the largest, and the maximum probability was &gt;20%. Runoff had a significant positive effect on the algal bloom index (BI) (<em>r</em> = 0.89, <em>p</em> &lt; 0.05), the correlation between BI and SST was weak (<em>r</em> = 0.50, <em>p</em> = 0.14), and the algal bloom probability had a significant negative correlation with SST (<em>r</em> = −0.71, <em>p</em> &lt; 0.05), implying that above a certain range of temperatures, algal growth rates may decrease with increasing temperature. The research results can provide a scientific basis for the early prevention, control, and emergency response of disasters, which is conducive to the sustainable and healthy development of marine resources and has significant scientific and management significance.</p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"245 ","pages":"Article 103989"},"PeriodicalIF":2.8,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141290666","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}