Global and regional marine ecosystem model climate change projections reveal key uncertainties

Authorea (Authorea), Journal Year: 2024, Volume and Issue: unknown

Published: May 10, 2024

Climate change is affecting ocean temperature, acidity, currents, and primary production, causing shifts in species distributions, marine ecosystems, ultimately fisheries. Earth system models simulate climate impacts on physical biogeochemical properties of future oceans under varying emissions scenarios. Coupling these simulations with an ensemble global ecosystem indicates decreasing fish biomass warming. However, regional projections remain much more uncertain. Here, we employ CMIP5 CMIP6 impact using two coupled four nine ten regions to evaluate model agreement at scales. We find that developed different scales can lead stark differences projections. On average, projected greater declines by the end 21st century than models. For both models, were simulations. Global 86% for compared 50% same regions. In simulations, all 2100, while 67% region Our analysis suggests improved understanding causes between needed, alongside observational evaluation modelled responses.

Language: Английский

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Gap Analysis on the Biology of Marine Fishes Across European Seas

Reviews in Fisheries Science & Aquaculture, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 22

Published: Jan. 7, 2025

This review evaluates the current knowledge of essential biological traits (diet, fecundity, maturity, length-weight relationships, spawning, growth, lifespan, and natural mortality) marine fishes across European adjacent waters. These are crucial for ecosystem modeling stock assessments. Using data from FishBase, largest most comprehensive database on fishes, a gap analysis was performed to identify areas research focus corresponding gaps that require further study. Biological coverage is strong in Baltic North Seas but moderate Adriatic, Aegean, Biscay, Celtic, Levantine, western Mediterranean Seas. Well-documented species include conger (Conger conger), thornback ray (Raja clavata), transparent goby (Aphia minuta) which reported all areas. The narrowest concern followed by spawning while mortality fecundity least studied characteristics. Regional variations exist, particularly protected species. Future should filling addressing overlooked (bycatch discarded species) such as with special attention vulnerable groups like sharks rays. Expanding will reduce uncertainties assessments improve models, two widely used tools sustainable fisheries management conservation.

Language: Английский

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Status assessment of the Beibu Gulf coastal fishery ecosystem using a multispecies size-spectrum model

Reviews in Fish Biology and Fisheries, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 20, 2025

Language: Английский

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Global and Regional Marine Ecosystem Models Reveal Key Uncertainties in Climate Change Projections

Earth s Future, Journal Year: 2025, Volume and Issue: 13(3)

Published: March 1, 2025

Abstract Climate change is affecting ocean temperature, acidity, currents, and primary production, causing shifts in species distributions, marine ecosystems, ultimately fisheries. Earth system models simulate climate impacts on physical biogeochemical properties of future oceans under varying emissions scenarios. Coupling these simulations with an ensemble global ecosystem has indicated broad decreases fish biomass warming. However, regional details remain much more uncertain. Here, we employ CMIP5 CMIP6 impact projections using two coupled four nine 10 regions to evaluate model agreement at scales. We find that developed different scales can lead stark differences projections. On average, projected greater declines by the end 21st century than models. For both models, were simulations. Global 86% for compared 50% same regions. In simulations, all 2100, while 67% region Our analysis suggests improved understanding causes between needed, alongside observational evaluation modeled responses.

Language: Английский

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Linking sea and land systems through food web models and value chains: a portrait of the Ebro Delta (NW Mediterranean Sea)

Sustainability Science, Journal Year: 2025, Volume and Issue: unknown

Published: March 13, 2025

Language: Английский

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Phenotypic plasticity in the health status of western Mediterranean sardines. Estimation of spawning quantity and quality

Frontiers in Marine Science, Journal Year: 2025, Volume and Issue: 12

Published: April 17, 2025

The European sardine exhibits drastic changes in body condition, growth, and reproduction outputs with fluctuating environments, leading to trade-offs life history traits. This study aimed compare the health status of sardines collected four areas western Mediterranean facing different environmental anthropogenic pressures (the Gulf Lion, northern Catalan coast, southern Alboran Sea). A decreasing gradient was observed somatic condition from south north Mediterranean. Sardines Lion exhibited poor throughout their reproductive cycle reached relatively small adult sizes. These did not waste energy for growth but favored investment reproduction, which turn could lead increased mortality after spawning season. Moreover, Sea tended exhibit satisfactory conditions cycle, using mesenteric fat almost as a unique resource investment. probably invested both energetic resources were abundant. they fed intensively during winter season maintained high suggests an income breeding strategy. Along followed capital strategy, developed gonads stored primary production blooms spring. Although depleted considerable part tissue contents season, invest growth. Finally, under highest levels relative batch fecundity December, produced best egg quality, likely ensure greater larval survival good recruitment.

Language: Английский

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Spring Food Spectrum of Two Planktivores (Sardina pilchardus Walbaum 1792 and Sardinella aurita Valenciennes 1847) From the Central Algerian Coast (3° E to 4° E—South West Mediterranean Sea) in Relation to Sexes and Sizes

Fisheries Oceanography, Journal Year: 2025, Volume and Issue: unknown

Published: May 3, 2025

ABSTRACT Sardina pilchardus , Walbaum 1792, and Sardinella aurita Valenciennes 1847, are the fish most consumed by Algerian population. Sardine has become increasingly rare in commercial fishing catches, whereas round sardinella is being sold at excessively high prices. Given importance of trophic interactions between clupeids low levels pelagic food web (plankton others), stomach contents two species S. studied. Samples collected from spring fishery (April May 2023) associated with main ports on central coast (Algiers Bou Ismail) justified intense activity these predators. High feeding intensity (or vacuity coefficient) recorded both males females. Our results support hypothesis that diet specific zones remains consistent due to stable local resources. This underscored lack variation prey quality quantity across size sex clupeid species, emphasizing role within web. Using morphological identification counting technique, preys linked 12 taxonomic units belonging zooplankton, phytoplankton, miscellaneous communities. The analysis carried out classifying basis frequency index ( If ), taking into account where three categories defined. Copepods preferred rates did not differ significantly place origin clupeids. These findings extended secondary (other zooplankton phytoplankton). Also, composition remained homogeneous Gulfs Algiers Ismail. Quantitative qualitative their target ecosystems will serve as a for fisheries management (i.e., Ecosystem Approach Fisheries Management [EAFM] Ecosystem‐Based [EBFM]). modeling all variables allow decision makers predict level exploitable biomass medium long term.

Language: Английский

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Jet stream poleward migration leads to marine primary production decrease

Progress In Oceanography, Journal Year: 2025, Volume and Issue: unknown, P. 103494 - 103494

Published: May 1, 2025

Language: Английский

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Microplastic characterization in the stomachs of swordfish (Xiphias gladius) from the western Mediterranean Sea

Marine Pollution Bulletin, Journal Year: 2024, Volume and Issue: 206, P. 116767 - 116767

Published: July 27, 2024

In this study, we aimed to quantify the presence of microplastics (MPs) in stomachs large pelagic fish (swordfish, Xiphias gladius, Linnaeus, 1758) sampled western Mediterranean Sea, and assess temporal trends (2011-2012 vs. 2017-2019) MP ingestion. MPs were extracted from characterized by μ-Fourier transform infrared spectroscopy. Results highlighted ingestion 39 out 49 analysed. Ingested consisted mostly small (<1 mm) fibers (88.6 %, mean ± standard deviation = 2.5 6.1 particles per stomach), with a greater frequency occurrence (FO) second period (FO 90 3.3 8.0 stomach). The predominant colours purple, black blue, polyethylene terephthalate was most frequently detected polymer. These results are crucial for development management actions at conservation swordfish Sea prevention health risks humans.

Language: Английский

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Bayesian joint longitudinal models for assessing the exploitation rates of sardine stock in the Mediterranean Sea

Stochastic Environmental Research and Risk Assessment, Journal Year: 2024, Volume and Issue: 38(4), P. 1635 - 1646

Published: Jan. 12, 2024

Abstract The European sardine is a pelagic species of great ecological importance for the conservation Mediterranean Sea as well economic countries. Its fishing has suffered significant decline in recent years due to various economic, cultural and reasons. This paper focuses on evolution catches from 1985 2018 according country type practised, artisanal industrial. We propose three Bayesian longitudinal linear mixed models assess differences temporal industrial fisheries between within Overall results confirm that fishery time series are highly diverse along their dynamics this heterogeneity persistent throughout time. Furthermore, our highlight positive correlation fishing. Finally, study observes consistent decreasing trend quantity fish landings. Although causes feature could be also linked motivations (such reduction demand or reorientation fleets towards more commercially beneficial species), it may indicate potential risk stock Sea.

Language: Английский

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