Species richness and spatial distribution of benthic amphipods (Crustacea: Peracarida) in the Alacranes Reef National Park, Gulf of Mexico

Periodo de realización: 1900/01/01 al 2018/06/01

Tipo: Artículo científico

Lugar(es) de estudio: Arrecife Alacranes
Resumen: "The diversity and distribution of benthic amphipods has been explored in the Alacranes Reef, which is the largest coral reef ecosystem in the Gulf of Mexico. New insights into species richness, spatial distribution and extension of geographical ranges are presented by using data from published records and field surveys. A total of 117 species have been recorded, 9 of which are potentially new to science, 39 of which have new geographical records, and 7 are non-indigenous and previously reported in the literature as potentially invasive. Based on the use of a species-richness indicator (Chao 2), the expected species number is 40% higher, up to 200 spp., when compared to the observed species richness. The spatial distribution of amphipods varied significantly as a function of habitat type, showing the highest richness values on coral patches and the major abundances on man-made structures, such as navigation buoys and fishing traps. Multivariate analyses suggested the distinction between three taxonomically diverse species assemblages that showed similar ecological affinities, i.e. those on: (1) soft-bottom environments, grouping bare substrata and seagrass beds habitats"

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