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title Structure of Small Mammal Assemblages Across Flooded and Unflooded Gallery Forests of the Amazonia-Cerrado Ecotone
authors Pereira, MR; Rocha, RG; Ferreira, E; Fonseca, C
author full name Pereira, Maria Ramos; Rocha, Rita G.; Ferreira, Eduardo; Fonseca, Carlos
title Structure of Small Mammal Assemblages Across Flooded and Unflooded Gallery Forests of the Amazonia-Cerrado Ecotone
nationality internacional
source BIOTROPICA
language English
document type Article
author keywords Araguaia; habitat heterogeneity; marsupials; river dynamics; rodents
keywords plus SPECIES RICHNESS; ATLANTIC FOREST; INUNDATION FORESTS; CENTRAL BRAZIL; NATIONAL-PARK; PATTERNS; CONSERVATION; DIVERSITY; CLASSIFICATION; EVOLUTIONARY
abstract Habitat heterogeneity may affect the structure of animal assemblages even within apparently homogenous landscapes. Gallery forests of the Amazonia-Cerrado ecotone have a small-scale patchiness that is induced by river system dynamics. Gallery forests that never flood are located in upper areas of watercourse margins, whereas seasonally flooded gallery forests are located at lower ground along those margins. We tested the prediction that the assemblage structure of small non-volant mammals of these two types of forests is distinct and arises from the ecological heterogeneity induced by seasonal floods. We found that species composition differed between forest types, with arboreal species dominating in the seasonally flooded forests and a more balanced distribution of arboreal and terrestrial species in unflooded forests. We found no differences in species abundance between habitats, but species richness was higher in unflooded forests. We hypothesize that this difference is due to decreased resource availability for strictly terrestrial species in seasonally flooded forests. Relative biomass of seasonally flooded forests was more than twice that of unflooded forests due to the dominance of large-bodied didelphid species in that assemblage. Our results suggest that the ecological heterogeneity created by seasonal floods is central to maintaining diverse assemblages in this region. The preservation of both unflooded and flooded gallery forests, which are under high human pressure from deforestation, agricultural conversion, and implementation of dams, may be crucial to preserving small mammal diversity at the landscape scale.
author address [Pereira, Maria Ramos; Rocha, Rita G.; Ferreira, Eduardo; Fonseca, Carlos] Univ Aveiro, Dept Biol, P-3810193 Aveiro, Portugal; [Pereira, Maria Ramos; Rocha, Rita G.; Ferreira, Eduardo; Fonseca, Carlos] Univ Aveiro, Ctr Environm & Marine Studies, P-3810193 Aveiro, Portugal; [Rocha, Rita G.; Ferreira, Eduardo] Fed Univ Tocantins, BR-77001090 Palmas, Tocantins, Brazil; [Ferreira, Eduardo] Univ Cape Verde, Dept Engn & Sea Sci, Mindelo, Cape Verde
reprint address Pereira, MR (reprint author), Univ Aveiro, Dept Biol, Campus Santiago, P-3810193 Aveiro, Portugal.
e-mail address mariajoaopereira@ua.pt
researcherid number Rocha, Rita/F-9845-2012; Fonseca, Carlos/D-9744-2011; Ramos Pereira, Maria Joao/P-6221-2014; Ferreira, Eduardo/G-2291-2010; CESAM, UA/M-3762-2015
orcid number Rocha, Rita/0000-0002-4410-3648; Fonseca, Carlos/0000-0001-6559-7133; Ramos Pereira, Maria Joao/0000-0002-9365-5166; Ferreira, Eduardo/0000-0003-0497-6118;
funding agency and grant number Fundacao para a Ciencia e Tecnologia [SFRH/BPD/72845/2010, SFRH/BD/24767/2005, SFRH/BD/23191/2005, SFRH/BPD/72895/2010]
funding text MJRP, RGR, and EF were funded by Fundacao para a Ciencia e Tecnologia, through grants SFRH/BPD/72845/2010, SFRH/BD/24767/2005, SFRH/BD/23191/2005 and SFRH/BPD/72895/2010.
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cited reference count 64
times cited 4
total times cited count (wos, bci, and cscd) 4
publisher WILEY-BLACKWELL
publisher city HOBOKEN
publisher address 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
issn 0006-3606
29-character source abbreviation BIOTROPICA
iso source abbreviation Biotropica
publication date JUL
year published 2013
volume 45
issue 4
beginning page 489
ending page 496
digital object identifier (doi) 10.1111/btp.12027
page count 8
web of science category Ecology
subject category Environmental Sciences & Ecology
document delivery number 175DQ
unique article identifier WOS:000321210900011
link http://onlinelibrary.wiley.com/doi/10.1111/btp.12027/abstract