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Megabenthic assemblages from South Adriatic marine mesophotic environments
Guadalupe Giménez1,2, Cataldo Pierri3,4, Giuseppe Corriero1,5
1Department of Biosciences, Biotechnologies and Environment, University of Bari Aldo Moro, Bari, 70125, Italy.
Scientific Reports
|August 11, 2025
Summary
Mesophotic habitats in the Mediterranean Sea host diverse benthic communities. This study reveals distinct assemblages associated with algal versus invertebrate bioconstructions, highlighting their role as biodiversity hotspots.
Area of Science:
- Marine Ecology
- Benthic Ecology
- Biodiversity Studies
Background:
- Mesophotic ecosystems (MEs) in the Mediterranean Sea support rich benthic communities.
- Invertebrate bioconstructions, often termed coralligenous, show taxonomic variability.
- Understanding diversity patterns in MEs is crucial for conservation.
Purpose of the Study:
- To investigate diversity patterns of megabenthic assemblages.
- To compare communities associated with algal and invertebrate bioconstructions.
- To assess the role of bioconstructions in shaping mesophotic biodiversity.
Main Methods:
- Image analysis of 360 seabed frames from the Apulian coast.
- Application of alpha- and beta-diversity metrics.
- Identification of megabenthic taxa and bioconstructor types.
Main Results:
- 81 taxa identified, with distinct coverage patterns for algal vs. coral/oyster bioconstructions.
- Mesophotic algal assemblages differ significantly from coral and oyster bioconstructions.
- Seabed morphology and primary bioconstructors are key drivers of community structure.
Conclusions:
- Significant differences exist between upper and deeper megabenthic assemblages.
- Mesophotic bioconstructions act as crucial biodiversity hotspots.
- Targeted conservation strategies are needed for Mediterranean marine ecosystems.
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