Benthic species of the Kerguelen Plateau show contrasting distribution shifts in response to environmental changes

C Guillaumot, S Fabri‐Ruiz, A Martin… - Ecology and …, 2018 - Wiley Online Library
Ecology and Evolution, 2018Wiley Online Library
Marine life of the Southern Ocean has been facing environmental changes and the direct
impact of human activities during the past decades. Benthic communities have particularly
been affected by such changes although we only slowly understand the effect of
environmental changes on species physiology, biogeography, and distribution. Species
distribution models (SDM) can help explore species geographic responses to main
environmental changes. In this work, we modeled the distribution of four echinoid species …
Abstract
Marine life of the Southern Ocean has been facing environmental changes and the direct impact of human activities during the past decades. Benthic communities have particularly been affected by such changes although we only slowly understand the effect of environmental changes on species physiology, biogeography, and distribution. Species distribution models (SDM) can help explore species geographic responses to main environmental changes. In this work, we modeled the distribution of four echinoid species with contrasting ecological niches. Models developed for [2005–2012] were projected to different time periods, and the magnitude of distribution range shifts was assessed for recent‐past conditions [1955–1974] and for the future, under scenario RCP 8.5 for [2050–2099]. Our results suggest that species distribution shifts are expected to be more important in a near future compared to the past. The geographic response of species may vary between poleward shift, latitudinal reduction, and local extinction. Species with broad ecological niches and not limited by biogeographic barriers would be the least affected by environmental changes, in contrast to endemic species, restricted to coastal areas, which are predicted to be more sensitive.
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