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Fish species richness is associated with the availability of landscape components across seasons in the Amazonian floodplain

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journal contribution
posted on 2018-06-21, 00:00 authored by Carlos Edwar Carvalho Freitas, Laurie Laurenson, Kedma Cristine Yamamoto, Bruce Rider Forsberg, Miguel Petrere, Caroline Arantes, Flavia Kelly Siqueira-Souza
Understanding environmental biodiversity drivers in freshwater systems continues to be a fundamental challenge in studies of their fish assemblages. The present study seeks to determine the degree to which landscape variables of Amazonian floodplain lakes influences fish assemblages in these environments. Fish species richness was estimated in 15 Amazonian floodplain lakes during the high and low-water phases and correlated with the areas of four inundated wetland classes: (i) open water, (ii) flooded herbaceous, (iii) flooded shrubs and (iv) flooded forest estimated in different radius circular areas around each sampling site. Data were analyzed using generalized linear models with fish species richness, total and guilds as the dependent variable and estimates of buffered landscape areas as explanatory variables. Our analysis identified the significance of landscape variables in determining the diversity of fish assemblages in Amazonian floodplain lakes. Spatial scale was also identified as a significant determinant of fish diversity as landscape effects were more evident at larger spatial scales. In particular, (1) total species richness was more sensitive to variations in the landscape areas than number of species within guilds and (2) the spatial extent of the wetland class of shrubs was consistently the more influential on fish species diversity.

History

Journal

PeerJ

Volume

6

Article number

e5080

Pagination

1 - 16

Publisher

PeerJ Inc.

Location

Corte Madera, Calif.

ISSN

2167-8359

Language

eng

Publication classification

C Journal article; C1 Refereed article in a scholarly journal

Copyright notice

2018, Carvalho Freitas et al.