Spatially explicit individual-based model reveals the mauve stinger jellyfish distribution in the Mediterranean Sea

Ecological Modelling, Journal Year: 2025, Volume and Issue: 505, P. 111109 - 111109

Published: April 10, 2025

Language: Английский

---

The Mediterranean Forecasting System – Part 1: Evolution and performance

Ocean science, Journal Year: 2023, Volume and Issue: 19(5), P. 1483 - 1516

Published: Oct. 25, 2023

Abstract. The Mediterranean Forecasting System produces operational analyses and reanalyses 10 d forecasts for many essential ocean variables (EOVs), from currents, temperature, salinity, sea level to wind waves pelagic biogeochemistry. products are available at a horizontal resolution of 1/24∘ (approximately 4 km) with 141 unevenly spaced vertical levels. core the is constituted by physical (PHY), biogeochemical (BIO), wave (WAV) components, consisting both numerical models data assimilation modules. three components together constitute so-called Monitoring Center (Med-MFC) Copernicus Marine Service. Daily produced PHY, BIO, WAV systems, while every ∼ 3 years past 30 extended (yearly). modelling their coupling strategy, evolutions illustrated in detail. For first time, quality documented terms skill metrics evaluated over common 3-year period (2018–2020), giving complete assessment uncertainties all environmental variable analyses.

Language: Английский

---

Structure and diversity patterns of coralligenous cliffs across three ecoregions in the Central‐Western Mediterranean Sea

Diversity and Distributions, Journal Year: 2024, Volume and Issue: 30(9)

Published: July 10, 2024

Abstract Aim Coralligenous reefs are the main marine bioconstructions in terms of spatial distribution within Mediterranean basin. Two distinct reef morphologies can be distinguished based on surface and topographical features seafloor: cliffs developing vertical slopes banks found gently steep or horizontal bottoms. Despite their importance for monitoring conservation efforts, observations regarding variability biogeographical patterns scarce. Here, we aimed to assess differences composition structure these across ecoregions estimate relative role abiotic environmental features, geographic location, connectivity shaping diversity patterns. Location The study was carried out Central‐Western Sea. Samples were collected at 65 sites Algero‐Provençal Basin, Ionian Sea Tyrrhenian Methods We assessed coralligenous through photographic samplings by scuba divers. Patterns α‐ β‐diversity associated with 9 variables, latitudinal longitudinal gradients, measures using Generalized Additive (GAM) Conditional Autoregressive (CAR) models. Results primarily composed algae displayed a high degree variability. Partition Around Medoids (PAM) clustering method successfully delineated seven clusters non‐uniform studied ecoregions. α‐diversity increased eastern northern phosphate concentration, while decreased temperature, chlorophyll nitrates concentration. site level it negatively affected northward current speed Moveover, connected sites. Main Conclusions cliff responds both physico‐chemical habitat between‐habitats connectivity. However, our findings suggest that small‐scale biotic processes could contribute explaining observed. These significantly enhance efforts this endemic ecosystem.

Language: Английский

---

Why Amphistegina lobifera, a tropical benthic foraminiferal species, is thriving at temperate latitudes in the Mediterranean Sea

The Journal of Foraminiferal Research, Journal Year: 2024, Volume and Issue: 54(3), P. 237 - 248

Published: July 1, 2024

Abstract Amphistegina lobifera Larsen is a relatively large (adult diameter ∼1–3 mm), robust, diatom-symbiont-bearing benthic foraminiferal species that thrives in clear, nutrient-poor coastal waters throughout much of the subtropical/tropical Indo-Pacific. Studies late 19th to mid-20th century noted predominance shells and Calcarina Holocene reef sediments, enhanced by hydrodynamic sorting resistance these abrasion. Having migrated through Suez Canal at least 60–80 years before present, A. populations have proliferated eastern Mediterranean Sea expanded their range westward. As warm, foraminifers are thriving oligotrophic, shallow-water habitats, produced shell accumulations half meter or more some areas. While success has raised concerns about its proliferation as an invasive species, assessments assemblages along nutrient gradients shown dominance only distant from sources, whether natural anthropogenic. The genus emerged Eocene under higher atmospheric CO2 concentrations than present experimental studies can sustain shell-growth rates elevated pCO2. Warming temperatures also increase metabolic rates, increasing energetic advantages algal symbiosis. surface continue already salinity alkalinity central should further enhance carbonate production possibly other host symbionts. Observed accumulation concentration dead nearshore wave action comparable ongoing sea-level rise. Might this return prolific ultimately prove locally beneficial climate change progresses?

Language: Английский

---

Interactive effects of fishing effort reduction and climate change in a central Mediterranean fishing area: Insights from bio-economic indices derived from a dynamic food-web model

Frontiers in Marine Science, Journal Year: 2022, Volume and Issue: 9

Published: Aug. 12, 2022

Disentangling the effects of mixed fisheries and climate change across entire food-webs requires a description ecosystems using tools that can quantify interactive as well bio-economic aspects. A calibrated dynamic model for Sicily Channel food web, made up 72 functional groups including 13 fleet segments, was developed. temporal simulation until 2050 conducted to evaluate reduction bottom trawling fishing effort by exploring different scenarios combine fishery change. Our results indicate direct indirect produce net increase in biomass many with immediate decline trawlers’ catches economic incomes, followed long term mainly due rebuilding commercial species which lasts 5-10 years after reduction. Synergistic antagonistic caused changes characterize specific group’s response which, turn, modulate also catch income other fleets, especially those sharing target resources. However, trawler’s intra-fleet competition is higher than others effects. In medium term, are seem make exploitation marine resources more sustainable over time processes efficient improving ecosystem health.

Language: Английский

---