Item


Geographic distance, water circulation and environmental conditions shape the biodiversity of Mediterranean rocky coasts

Ecological connectivity is important for effective marine planning and biodiversity conservation. Our aim was to identify factors important in influencing variation in benthic community structure on shallow rocky reefs in 2 regions of the Mediterranean Sea with contrasting oceanographic regimes. We assessed beta (β) diversity at 146 sites in the littoral and shallow sublittoral from the Adriatic/Ionian Seas (eastern region) and Ligurian/Tyrrhenian Seas (western region) using a null modelling approach to account for variation in species richness. The distance decay relationship between species turnover within each region and geographic distance by sea was determined using generalised linear models. Mantel tests were used to examine correlations between β diversity and connectivity by ocean currents, estimated from Lagrangian dispersal simulations. Variation in β diversity between sites was partitioned according to environmental and spatial components using a distance-based redundancy approach. Species turnover along a gradient of geographic distance was greater by a factor of 3 to 5 in the western region than the eastern region, suggesting lower connectivity between sites. β diversity was correlated with connectivity by ocean currents at both depths in the eastern region but not in the western region. The influence of spatial and environmental predictors of β diversity varied considerably between regions, but was similar between depths. Our results highlight the interaction of oceanographic, spatial and environmental processes influencing benthic marine β diversity. Persistent currents in the eastern region may be responsible for lower observed β diversity compared to the western region, where patterns of water circulation are more variable

© Marine Ecology Progress Series, 2016, vol. 553, p. 1-11

Inter Research

Author: Rattray, Alex
Andrello, Marco
Asnaghi, Valentina
Bevilacqua, Stanislao
Bulleri, Fabio
Cebrian Pujol, Emma
Chiantore, Mariachiara
Claudet, Joachim
Deudero, Salud
Evans, Julian
Fraschetti, Simonetta
Guarnieri, Giuseppe
Mangialajo, Luisa
Schembri, Patrick J.
Terlizzi, Antonio
Benedetti-Cecchi, Lisandro
Date: 2016 July 14
Abstract: Ecological connectivity is important for effective marine planning and biodiversity conservation. Our aim was to identify factors important in influencing variation in benthic community structure on shallow rocky reefs in 2 regions of the Mediterranean Sea with contrasting oceanographic regimes. We assessed beta (β) diversity at 146 sites in the littoral and shallow sublittoral from the Adriatic/Ionian Seas (eastern region) and Ligurian/Tyrrhenian Seas (western region) using a null modelling approach to account for variation in species richness. The distance decay relationship between species turnover within each region and geographic distance by sea was determined using generalised linear models. Mantel tests were used to examine correlations between β diversity and connectivity by ocean currents, estimated from Lagrangian dispersal simulations. Variation in β diversity between sites was partitioned according to environmental and spatial components using a distance-based redundancy approach. Species turnover along a gradient of geographic distance was greater by a factor of 3 to 5 in the western region than the eastern region, suggesting lower connectivity between sites. β diversity was correlated with connectivity by ocean currents at both depths in the eastern region but not in the western region. The influence of spatial and environmental predictors of β diversity varied considerably between regions, but was similar between depths. Our results highlight the interaction of oceanographic, spatial and environmental processes influencing benthic marine β diversity. Persistent currents in the eastern region may be responsible for lower observed β diversity compared to the western region, where patterns of water circulation are more variable
Format: application/pdf
Citation: 10.3354/meps11783
ISSN: 0171-8630 (versió paper)
1616-1599 (versió electrònica)
Document access: http://hdl.handle.net/10256/12822
Language: eng
Publisher: Inter Research
Collection: Reproducció digital del document publicat a: 10.3354/meps11783
Articles publicats (D-CCAA)
Is part of: © Marine Ecology Progress Series, 2016, vol. 553, p. 1-11
Rights: Attribution 3.0 Spain
Rights URI: http://creativecommons.org/licenses/by/3.0/es/
Subject: Biodiversitat -- Conservació
Biodiversity conservation
Connectivitat ecològica
Ecological connectivity
Title: Geographic distance, water circulation and environmental conditions shape the biodiversity of Mediterranean rocky coasts
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

Subjects

Authors