Damien Olivier, Nicolas Loiseau, David Petatán-Ramírez, Oscar Trujillo Millán, Alvin N. Suarez-Castillo, Jorge Torre, Adrian Munguia-Vega, Héctor Reyes-Bonilla,
2018
Revistas indexadas
Functional-biogeography of the reef fishes of the islands of the Gulf of California: Integrating functional divergence into marine conservation
16
2351-9894
CIENCIAS DE LA TIERRA Y EL COSMOS
OTRAS ESPECIALIDADES EN MATERIA DE CIENCIAS DE LA TIERRA DEL COSMOS Y DEL MEDIO AMBIENTE
The Gulf of California (GC) is a semi-closed sea in the Tropical Eastern Pacific and is rec- ognised as a highly diverse marine ecosystem. Despite this status, this region is still poorly studied in comparison to other marine hotspots. To start filling this gap, we attempt to provide a global overview of reef-fish diversity around the numerous islands of the region. We evaluated species richness, the abundance and biomass, and the functional diversity of the fish assemblages for the major islands of the GC. We first highlight that the south- western part of the central GC is the hotspot of reef-fishes diversity within the GC, in terms of species richness, functional diversity, and fish abundance. We then found out an important functional divergence between fish assemblages of northern and southern re- gions. The fish biomass of each region is dominated by different species, characterised by different ecological traits (the opposite of functional convergence). This functional diver- gence may be explained by an important oceanographic heterogeneity along the lat- itudinal axis of the GC. The northern part shows larger climate fluctuations while the southern part is more tropical and climatically stable. Such functional divergence is a biodiversity facet to take into account when determining the sites to focus conservation action. In the GC, this criterion allows the importance of some sites to be highlighted to preserve the legacy of the reef-fishes, despite their lower diversity levels.
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