Evaluation of the Effects of Environmental Factors on Seasonal Variations in Fish Diversity on a Coastal Island in Western Japan

Environments, Journal Year: 2024, Volume and Issue: 11(3), P. 60 - 60

Published: March 20, 2024

Coastal habitats are crucial for supporting ecological processes and serve as vital ecosystems diverse fish species, providing essential functions such feeding, nursery provision, reproductive habitats. Fish communities ecologically important components of coastal affected by multiple environmental factors. Despite their importance, determining the effects factors on seasonal variations in species diversity community dynamics remains a challenge. The advent DNA (eDNA) technology, an environmentally conscious approach, has resulted considerable advancements recent years been progressively adopted marine population monitoring. Here, we used metabarcoding to study structure island, assessed structuring these communities. Our findings revealed rich 72 across 40 families 23 orders seawater surrounding island Seto Inland Sea (SIS), Western Japan. Notably, composition varied significantly between seasons, with temperature, salinity, dissolved inorganic phosphorus (DIP) concentration identified correlated communities’ structures. In conclusion, our provides useful information diversity, suggest that eDNA is valuable technique monitoring areas. These studies oceanic environments.

Language: Английский

Ocean currents affect spatial patterns of fish communities in the Yellow Sea–Bohai Sea ecotone

Ecological Processes, Journal Year: 2025, Volume and Issue: 14(1)

Published: April 17, 2025

Abstract Background Understanding the drivers of spatial patterns in fish communities is important for protecting fishery ecosystems. However, influence ocean currents on remains poorly understood. This study investigated impacts and analyzed their driving mechanisms Yellow Sea–Bohai Sea ecotone during a one-year investigation. The distribution were visualized using data collected from Copernicus Marine Data Store resource surveys. To estimate communities, we developed vector method, which quantified aggregation direction basis Bray‒Curtis similarity coefficient azimuth angles, defined as community trend. Subsequently, cosine correlation was used to relationship between currents. ecological processes current mechanism via multivariate statistical analysis. Results trends strongly correlated with summer divided into three station-groups located eastern, northwestern, southwestern parts survey waters. winter composed two eastern western parts. environmental factors exhibited variations that mainly affected by currents, including Warm Current, coastal Cold Water Mass. associated primarily temperature depth salinity winter. Conclusions corresponded Driven such water varied spatially, leading migration typifying species suitable habitats then formation unique communities.

Language: Английский