Progress in Oceanography最新文献

{"title":"Recent sea level changes in the Red Sea: Thermosteric and halosteric contributions, and impacts of natural climate variability","authors":"Bayoumy Mohamed ,&nbsp;Nikolaos Skliris","doi":"10.1016/j.pocean.2025.103416","DOIUrl":"10.1016/j.pocean.2025.103416","url":null,"abstract":"<div><div>This study investigates sea level changes in the Red Sea over the last 29 years (1993–2021) by analyzing long-term trends and interannual variations in the total sea level anomaly (SLA). The study also explores the role of thermosteric and halosteric changes and interannual variability of total SLA using an empirical orthogonal function (EOF) analysis and their relationship with large-scale climate modes. The results show that the trends of total and steric SLA were higher in the northern Red Sea (NRS) than in the southern Red Sea (SRS), influenced by low-salinity water inflow from the Aden Gulf. The average SLA trend in the Red Sea between 1993 and 2021 was about 4.17 ± 0.14 mm/year. However, an abrupt change was observed in SLA and its components, with accelerating trends in the post-2008 period compared to the pre-2008 period. This increase was mainly due to the thermosteric effect, which was positively enhanced throughout the Red Sea. The halosteric component in the NRS contributed negatively to the overall steric effect. The interannual SLA variability accounts for about 45 % of the total variability and can be partially explained by the influence of the El Nino Southern Oscillation.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"231 ","pages":"Article 103416"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142967795","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":"Tidal energetics in the eddying South China Sea from a high-resolution numerical simulation","authors":"Yonghe Tian ,&nbsp;Xiaolin Bai ,&nbsp;Chuanyin Wang ,&nbsp;Zhiyu Liu","doi":"10.1016/j.pocean.2025.103418","DOIUrl":"10.1016/j.pocean.2025.103418","url":null,"abstract":"<div><div>Understanding tidal energetics is crucial for comprehending complex oceanic processes in the South China Sea (SCS). Tidal energy budget in different parts of the world’s oceans has been widely estimated, but the dissipation pathways of tidal energy in the eddying ocean remain elusive. Based on a well-validated high-resolution numerical simulation, this study provides an updated estimate of tidal energy budget in the SCS with the modulation of realistic background currents and stratification. It reveals that ∼19.72% of barotropic tidal energy input in the Luzon Strait (LS) is converted to baroclinic tides, ∼75.66% of which is transmitted out of the LS and the other ∼24.34% is dissipated locally. Additionally, ∼61.20% of barotropic tidal energy is transmitted into the SCS, and the other ∼19.07% is dissipated locally. Analysis of barotropic tidal energy budget highlights significant work rate of K₁ tide-generating force in the SCS, whereas analysis of baroclinic tidal energy budget reveals the impacts of background fields on energy conversion from barotropic to baroclinic tides and energy dissipation of baroclinic tides. The seasonal variability of tidal dynamics and energetics further highlights the modulations by background fields. An exponential decay of baroclinic tidal energy flux with the distance from the generation site is revealed, and the decay scales for K₁ (northwestward and southwestward beam of M₂) baroclinic tide are estimated as 404 (195 and 127) km. A simple scaling of baroclinic tidal energy flux in the SCS, which may be used to characterize tidal mixing in large-scale ocean and climate models, is thus devised.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"231 ","pages":"Article 103418"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097962","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":"Corrigendum to “Food web analysis shows an exacerbated dependence of zooplankton on detritus in oligotrophic systems due to ocean warming” [Prog. Oceanogr. 231 (2025) 103389]","authors":"Luca Russo ,&nbsp;Matteo Loschi ,&nbsp;Daniele Bellardini ,&nbsp;Roberta Congestri ,&nbsp;Michael W. Lomas ,&nbsp;Simone Libralato ,&nbsp;Domenico D’Alelio","doi":"10.1016/j.pocean.2025.103420","DOIUrl":"10.1016/j.pocean.2025.103420","url":null,"abstract":"","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"231 ","pages":"Article 103420"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143375847","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":"Snow crab (Chionoecetes opilio) in the Barents Sea — A passive or problematic invader?","authors":"Cecilie Hansen ,&nbsp;Erik Askov Mousing ,&nbsp;Carsten Hvingel","doi":"10.1016/j.pocean.2024.103382","DOIUrl":"10.1016/j.pocean.2024.103382","url":null,"abstract":"<div><div>The invasion and continued expansion of snow crab in the Barents Sea have provided the area with a new and valuable resource. On the negative side, this invasion may lead to changes in the ecosystem, including structural changes and shifts in energy pathways, as we generally view invaders as a problem. We investigated potential effects of snow crab invasion by applying an end-to-end ecosystem model under different scenarios of fishing and food availability. Overall, the model indicated a low negative impact of snow crab on the ecosystem in the region, also in a potential future with a much higher snow crab biomass. Although snow crab may be found to have local negative effects on specific benthic species, in general it appears that they have found a vacant ecological niche in the Barents Sea ecosystem. In addition, network analysis show that the food web of the Barents Sea becomes slightly more complex when including the snow crab, adding predator–prey interactions. By introducing more parallel foodpaths to the food web, this results in a more resilient ecosystem. Model simulations where the availability of prey to snow crab, and lack of fishing pressure maximizes snow crab abundance result in a somewhat increased impact on the food web. Nevertheless, the effects are still minor and there is no indications that the existing commercial fisheries for other species will be significantly affected. Hence, their role as a passive invader should be considered when structuring management responses.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"231 ","pages":"Article 103382"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141154","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":"Food web analysis shows an exacerbated dependence of zooplankton on detritus in oligotrophic systems due to ocean warming","authors":"Luca Russo ,&nbsp;Matteo Loschi ,&nbsp;Daniele Bellardini ,&nbsp;Roberta Congestri ,&nbsp;Michael W. Lomas ,&nbsp;Simone Libralato ,&nbsp;Domenico D’Alelio","doi":"10.1016/j.pocean.2024.103389","DOIUrl":"10.1016/j.pocean.2024.103389","url":null,"abstract":"<div><div>Ocean warming can affect plankton both directly, through altered metabolic activities, and indirectly, modifying the physical–chemical properties of the water column, with possible effects on ecosystem functioning. To evaluate the combined action of warming-related physiological responses and environmental changes on plankton functioning, we carried out a long-term analysis (from 1994 to 2019) of the Bermuda Atlantic Time-series Study (BATS) dataset where ocean warming and stratification have driven a decrease in the net primary production over the last decade. Using the time series of plankton observations, we assembled 1000 replicates of a food web model for each year. We observed that the total flow of matter through the model remained constant over time, despite the increased oligotrophication, due to global warming, after 2014. In fact, the plankton food web remained robust through re-modulated trophic interactions with an increased detritivory to herbivory ratio of the food web over time. However, it was problematic to re-establish the trophic connections of the food web broken by ocean warming, as remarked by the increased relative internal ascendency. Thanks to trophic plasticity, the reduced zooplankton dependence on herbivory was compensated by a significant increase in the reliance on carnivory and detritivores, highlighting the crucial role of trophic interactions in buffering significant environmental short-term changes.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"231 ","pages":"Article 103389"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142788923","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":"Oceanic phytoplankton structure off western Patagonia during the austral summer: Implications for harmful algal blooms","authors":"Andrea Corredor-Acosta ,&nbsp;Alexander Galán ,&nbsp;Gonzalo S. Saldías ,&nbsp;Jorge I. Mardones ,&nbsp;Johanna Medellín-Mora ,&nbsp;Máximo Frangopulos ,&nbsp;Takuhei Shiozaki ,&nbsp;Naomi Harada ,&nbsp;Humberto E. González ,&nbsp;José L. Iriarte","doi":"10.1016/j.pocean.2024.103409","DOIUrl":"10.1016/j.pocean.2024.103409","url":null,"abstract":"<div><div>Changes in phytoplankton composition and abundance are controlled by multiple factors, including physical forcing and nutrient stoichiometry. This study seeks to assess the interplay between the environmental and biogeochemical conditions in shaping the phytoplankton community structure in open ocean waters off western Patagonia. For this purpose, we used biological, hydrographic, and chemical data measured aboard the R/V Mirai during the austral summer of 2017, combined with remote sensing and reanalysis products. Although no first-order predictive relationships were found between the environmental and biological data, the results showed a latitudinal gradient of the phytoplankton structure, favoring maximum abundances of diatoms (∼10x10⁴ cells L^-1) in the northern area (∼43-48°S) characterized by high stratification and freshwater content. The high diatom abundances of <em>Thalassiosira</em> spp.<em>, Chaetoceros</em> spp.<em>, Pseudo-nitzschia</em> cf. <em>australis</em> and <em>Pseudo-nitzschia</em> cf. <em>pseudodelicatissima</em> taxa in this area results in a nutrient content decreases (nitrate &lt; 9 μmol kg⁻¹, phosphate &lt; 0.9 μmol kg⁻¹, silicic acid &lt; 1.5 μmol kg⁻¹), and low N:Si (&lt;8) and N:P (&lt;10) ratios. Nonetheless, the total dinoflagellates abundance was equal to or higher than those of diatoms (∼10.2x10⁴ cells L^-¹) throughout most of the sampling region. Specifically, maximum abundances (∼6.3x10⁴ cells L^-¹) of <em>Karenia</em> spp. were found in the north under the freshwater influence from the Gulf of Penas, where the highest ammonium:nitrate ratio (∼4 to 11.5) was recorded. In contrast, high dinoflagellate abundances of <em>Azadinium</em> spp. were found in the south (∼48-55°S), where an increase of nutrient content (nitrate ∼12μmol kg^-¹, phosphate ∼1 μmol kg^-¹, ammonium ∼0.4 μmol kg^-¹), and high N:Si and N:P ratios (∼35 and ∼12) were observed. This study highlights a major presence of potentially toxic phytoplankton species in the oceanic zone off northern Patagonia under conditions of strong latitudinal and cross-shore gradients in nutrient content and salinity, related to the interplay between oceanic water masses and freshwater input.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"231 ","pages":"Article 103409"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142925064","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":"Geographical and vertical distribution of Axinulus (Bivalvia: Thyasiridae): New data on distribution in the North Pacific and description of a new species","authors":"Gennady M. Kamenev ,&nbsp;Julia D. Sigwart","doi":"10.1016/j.pocean.2024.103408","DOIUrl":"10.1016/j.pocean.2024.103408","url":null,"abstract":"<div><div>The genus <em>Axinulus</em> is the richest in species number and quantitative abundance among representatives of the family Thyasiridae, which is found in the abyssal and hadal zones of the deep-sea areas of the northern Pacific Ocean. Many species of the genus form abundant populations and dominate the benthic communities of these deep-sea areas. The study of the material of bivalves collected by the “AleutBio” deep-sea expedition (2022) in the eastern part of the Aleutian Basin (Bering Sea) and in the Aleutian Trench revealed the occurrence of three species of the genus <em>Axinulus</em>, one of which turned out to be new to science, and <em>Axinulus krylovae</em> and <em>Axinulus oliveri</em> were first records for the eastern Pacific. Here, we describe <em>Axinulus pentagonalis</em> sp. nov. found in the Bering Sea and on the oceanic slopes of the Aleutian Islands at depths of 3646–4630 m and present new data on the distribution of <em>A. krylovae</em> and <em>A. oliveri</em>. The main feature distinguishing the new species from other species of <em>Axinulus</em> is the presence of a unique sculpture of the prodissoconch consisting of thin, curved, ramified, and branched folds extending from a short ridge in the middle of the prodissoconch. In addition, the new species differs from most of related species in the presence of a bulbous tip of the foot divided into two parts. We compare the new species with all related species and analyze the geographic and vertical distribution of all species of the genus <em>Axinulus</em> supplemented by new data.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"231 ","pages":"Article 103408"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097961","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":"Abundance and estimated food consumption of seabirds in the pelagic ecosystem in the eastern Indian sector of the Southern Ocean","authors":"Nobuo Kokubun ,&nbsp;Kohei Hamabe ,&nbsp;Nodoka Yamada ,&nbsp;Hiroko Sasaki ,&nbsp;Bungo Nishizawa ,&nbsp;Yutaka Watanuki ,&nbsp;Hiroto Murase","doi":"10.1016/j.pocean.2024.103385","DOIUrl":"10.1016/j.pocean.2024.103385","url":null,"abstract":"<div><div>Quantification of abundance and food consumption of seabirds are key to understand characteristics and ecological functions of local marine ecosystem due to their abundance and diversity in foraging areas, habitat, behavior, mobility and prey types. This study aimed to quantify seabird abundance in pelagic areas in the eastern Indian sector of the Southern Ocean (80–150°E) based on an at-sea observational study conducted during the 2018/19 austral summer season. We estimated food consumption by seabirds based on their biomass, estimated field metabolic rates, number of days spent in the areas, and diet composition. Among the five functional seabird groups (penguins, albatrosses/giant petrels, shearwaters, petrels/Charadriiformes, prions/storm-petrels), shearwaters, non-Antarctic resident, were the most dominant taxa both by abundance (15,650,000 birds) and biomass (9,332 tonnes) in the study area during the summer. Most of the prey consumed by all seabirds in the area was presumed to be Antarctic krill (55,504 tonnes) and pelagic fishes (91,695 tonnes), such as myctophids. Although the total food consumption by the seabirds during the summer (209,973 tonnes) was lower than that reported in the Antarctic neritic areas (e.g., 753,000 tonnes in the neighboring Prydz Bay region), the higher proportion of non-resident shearwaters in biomass and estimated food consumption (85%) were the characteristic of the study area. Our results highlight the characteristics of the ecological importance of the study area in which seabirds consume Antarctic krill and pelagic fishes in the upper layer of the water column, and its nutrients are easily transported by the seabirds as their subcutaneous fat or stomach oil to the outside of the areas.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"231 ","pages":"Article 103385"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142788911","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 effect of seasonality on the foraging behaviour and breeding success of a tropical marine top predator","authors":"Sarah Saldanha ,&nbsp;Teresa Militão ,&nbsp;Sam L Cox ,&nbsp;Irene Llamas-Cano ,&nbsp;Herculano Andrade Dinis ,&nbsp;Ivandra S.G.C. Gomes ,&nbsp;Artur Lopes ,&nbsp;Maldini dos Santos ,&nbsp;Vania Brito ,&nbsp;Marcos Hernández-Montero ,&nbsp;Jacob González-Solís","doi":"10.1016/j.pocean.2025.103413","DOIUrl":"10.1016/j.pocean.2025.103413","url":null,"abstract":"<div><div>In polar and temperate regions seasonality in environmental conditions is an important driver of animal phenology. In tropical systems, where the environment is relatively homogeneous year-round, the link between phenology and seasonality is weakened, and many species breed asynchronously or even year-round. This leads to the question of how these species adapt to seasonal changes, which remain present albeit to a lesser extent. To assess relationships between foraging plasticity and seasonal changes in oceanographic conditions and resource availability, we investigated the foraging ecology of the red-billed tropicbird (<em>Phaethon aethereus</em>), a poorly studied pantropical species that breeds year-round in Cabo Verde. From 2017 to 2022, we monitored tropicbird nests at three islands (Boavista, Sal and the Cima Islet) and GPS tracked 907 foraging trips from 329 adults to evaluate seasonality in nest occupancy, foraging patterns and efficiency, chick growth, chick and adult body condition, and breeding success, alongside links to seasonal changes in resource availability and environmental conditions. We found seasonal patterns in foraging behaviour, with individuals taking more distant and less sinuous foraging trips, using a larger core foraging area, spending more time foraging during twilight, and consuming more squid in the dry season (December-June), than in the wet season (July-November). Moreover, nest occupancy, chick body condition and breeding success were higher in the dry season. We suggest that the observed seasonal patterns are related to an increase in the availability of squid at the end of the dry season, and a decrease in the nest-site suitability and an increase in weather-related foraging costs in the wet season. Our results provide some of the first in-depth knowledge on the seasonal variation in foraging behaviour of a tropical seabird species, suggesting seasonality in tropical systems may be a stronger driver of the movements of top predators than previously thought.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"231 ","pages":"Article 103413"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141159","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":"A shifting chessboard: Projections of prawn, capelin, mesopelagic fish, zooplankton, and their Nordic and Barents Seas food web under climate change","authors":"Ina Nilsen ,&nbsp;Cecilie Hansen ,&nbsp;Isaac C. Kaplan","doi":"10.1016/j.pocean.2024.103387","DOIUrl":"10.1016/j.pocean.2024.103387","url":null,"abstract":"<div><div>As climate change is already altering ocean temperatures, there is an urgent need to understand how environmental changes will affect marine ecosystems. Although great efforts have been made to understand the impacts of ocean warming, there are still uncertainties regarding effects on lower trophic levels and how these may propagate to higher trophic levels. In this study, physics from three different climate projections (SPP1-2.6, SSP2-4.5 and SSP5-8.5) were applied to study the impact of rising temperatures in the Nordic and Barents Seas Atlantis ecosystem model (NoBa Atlantis). We also included variation in phyto- and zooplankton levels to account for the uncertainty regarding how lower trophic levels might respond to climate change. This approach by us is the first study where three different sets of physics have been applied to an end-to-end ecosystem model representing the Nordic and Barents Seas. We therefore treat the projected results with caution, and focus on the underlying mechanisms that drive the changes, to inform future ecosystem studies. The spatial nature of the model (a “shifting chessboard”) allowed us to study how local changes in temperature and prey could affect entire populations. For instance, the thermal niches of mesopelagic fish allowed for an increase in abundance in northern areas, benefiting predators such as blue whiting. On the other hand, thermal limits of capelin together with zooplankton overlap resulted in declines, which subsequently led to reduction in cod growth. This study demonstrates how ecosystem studies could benefit from both modeling and empirical studies that consider not only broad-brush impacts on primary production and trophic transfer, but also spatial considerations of local predator–prey interactions, thermal habitat and spawning-area suitability.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"231 ","pages":"Article 103387"},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142821050","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}