Spatial and temporal variation in amphibian metacommunity structure in Chiapas, México

Amphibians are known to be sensitive to environmental change but their responses at the level of metacommunities to short-term environmental variability are poorly understood.Weused field data fromtwoprotected areas, La Pera andNah´a (Chiapas,Mexico) to test for variation in metacommunity properties for two consecutive years (2009 and 2010). Amphibians and accompanying environmental data were recorded to a standardized protocol within each landscape, in four or five transects of 50 × 2-m per patch, for 30 and 31 patches, respectively. We found 23 species in La Pera and 30 in Nah´a (21 species shared). Metacommunity structure was analysed using reciprocal averaging (RA) ordination by means of metrics for coherence, turnover and boundary clumping, with Spearman rank correlation used to examine relationships with environmental variables. The metacommunity structure varied differentially among the landscapes between years, being classed as quasi-Gleasonian in La Pera in both years, but Clementsian for Nah´a in 2009 and Gleasonian for Nah´a in 2010. In further illustration of variation between years, in 2009 the principal community gradient (RA axis 1) for La Pera was significantly positively correlated with altitude (r = 0.36), forest disturbance status (r = 0.78), mean canopy cover (r = 0.79) and mean litter depth (r = 0.67), while in 2010 it was correlated with latitude (r = 0.38), mean grass-layer height (r = 0.38), incidence of rainfall prior to sampling (r = 0.35) and presence of temporary ponds (r = 0.45). Our findings support the notion that amphibians respond to short-term environmental changes by individualistic movement within the landscape as well as via population dynamic responses

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Main Authors: Ochoa Ochoa, Leticia Margarita autor/a, Whittaker, Robert James autor/a
Format: Texto biblioteca
Language:eng
Subjects:Anfibios, Cambio climático, Paisajes fragmentados, Zoogeografía, Artfrosur,
Online Access:http://journals.cambridge.org/download.php?file=%2F5186_952963E3EBFCF045371B2F12B4E18FF5_journals__TRO_TRO30_06_S0266467414000388a.pdf&cover=Y&code=d0ea9423162d55c7b810d4d41529542f
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spelling KOHA-OAI-ECOSUR:538692024-08-07T11:27:06ZSpatial and temporal variation in amphibian metacommunity structure in Chiapas, México Ochoa Ochoa, Leticia Margarita autor/a Whittaker, Robert James autor/a textengAmphibians are known to be sensitive to environmental change but their responses at the level of metacommunities to short-term environmental variability are poorly understood.Weused field data fromtwoprotected areas, La Pera andNah´a (Chiapas,Mexico) to test for variation in metacommunity properties for two consecutive years (2009 and 2010). Amphibians and accompanying environmental data were recorded to a standardized protocol within each landscape, in four or five transects of 50 × 2-m per patch, for 30 and 31 patches, respectively. We found 23 species in La Pera and 30 in Nah´a (21 species shared). Metacommunity structure was analysed using reciprocal averaging (RA) ordination by means of metrics for coherence, turnover and boundary clumping, with Spearman rank correlation used to examine relationships with environmental variables. The metacommunity structure varied differentially among the landscapes between years, being classed as quasi-Gleasonian in La Pera in both years, but Clementsian for Nah´a in 2009 and Gleasonian for Nah´a in 2010. In further illustration of variation between years, in 2009 the principal community gradient (RA axis 1) for La Pera was significantly positively correlated with altitude (r = 0.36), forest disturbance status (r = 0.78), mean canopy cover (r = 0.79) and mean litter depth (r = 0.67), while in 2010 it was correlated with latitude (r = 0.38), mean grass-layer height (r = 0.38), incidence of rainfall prior to sampling (r = 0.35) and presence of temporary ponds (r = 0.45). Our findings support the notion that amphibians respond to short-term environmental changes by individualistic movement within the landscape as well as via population dynamic responsesAmphibians are known to be sensitive to environmental change but their responses at the level of metacommunities to short-term environmental variability are poorly understood.Weused field data fromtwoprotected areas, La Pera andNah´a (Chiapas,Mexico) to test for variation in metacommunity properties for two consecutive years (2009 and 2010). Amphibians and accompanying environmental data were recorded to a standardized protocol within each landscape, in four or five transects of 50 × 2-m per patch, for 30 and 31 patches, respectively. We found 23 species in La Pera and 30 in Nah´a (21 species shared). Metacommunity structure was analysed using reciprocal averaging (RA) ordination by means of metrics for coherence, turnover and boundary clumping, with Spearman rank correlation used to examine relationships with environmental variables. The metacommunity structure varied differentially among the landscapes between years, being classed as quasi-Gleasonian in La Pera in both years, but Clementsian for Nah´a in 2009 and Gleasonian for Nah´a in 2010. In further illustration of variation between years, in 2009 the principal community gradient (RA axis 1) for La Pera was significantly positively correlated with altitude (r = 0.36), forest disturbance status (r = 0.78), mean canopy cover (r = 0.79) and mean litter depth (r = 0.67), while in 2010 it was correlated with latitude (r = 0.38), mean grass-layer height (r = 0.38), incidence of rainfall prior to sampling (r = 0.35) and presence of temporary ponds (r = 0.45). Our findings support the notion that amphibians respond to short-term environmental changes by individualistic movement within the landscape as well as via population dynamic responsesAdobe Acrobat profesional 6.0 o superior e InternetAnfibiosCambio climáticoPaisajes fragmentadosZoogeografíaArtfrosurDisponible en líneaJournal of Tropical Ecologyhttp://journals.cambridge.org/download.php?file=%2F5186_952963E3EBFCF045371B2F12B4E18FF5_journals__TRO_TRO30_06_S0266467414000388a.pdf&cover=Y&code=d0ea9423162d55c7b810d4d41529542fAcceso en línea sin restricciones
institution ECOSUR
collection Koha
country México
countrycode MX
component Bibliográfico
access En linea
En linea
databasecode cat-ecosur
tag biblioteca
region America del Norte
libraryname Sistema de Información Bibliotecario de ECOSUR (SIBE)
language eng
topic Anfibios
Cambio climático
Paisajes fragmentados
Zoogeografía
Artfrosur
Anfibios
Cambio climático
Paisajes fragmentados
Zoogeografía
Artfrosur
spellingShingle Anfibios
Cambio climático
Paisajes fragmentados
Zoogeografía
Artfrosur
Anfibios
Cambio climático
Paisajes fragmentados
Zoogeografía
Artfrosur
Ochoa Ochoa, Leticia Margarita autor/a
Whittaker, Robert James autor/a
Spatial and temporal variation in amphibian metacommunity structure in Chiapas, México
description Amphibians are known to be sensitive to environmental change but their responses at the level of metacommunities to short-term environmental variability are poorly understood.Weused field data fromtwoprotected areas, La Pera andNah´a (Chiapas,Mexico) to test for variation in metacommunity properties for two consecutive years (2009 and 2010). Amphibians and accompanying environmental data were recorded to a standardized protocol within each landscape, in four or five transects of 50 × 2-m per patch, for 30 and 31 patches, respectively. We found 23 species in La Pera and 30 in Nah´a (21 species shared). Metacommunity structure was analysed using reciprocal averaging (RA) ordination by means of metrics for coherence, turnover and boundary clumping, with Spearman rank correlation used to examine relationships with environmental variables. The metacommunity structure varied differentially among the landscapes between years, being classed as quasi-Gleasonian in La Pera in both years, but Clementsian for Nah´a in 2009 and Gleasonian for Nah´a in 2010. In further illustration of variation between years, in 2009 the principal community gradient (RA axis 1) for La Pera was significantly positively correlated with altitude (r = 0.36), forest disturbance status (r = 0.78), mean canopy cover (r = 0.79) and mean litter depth (r = 0.67), while in 2010 it was correlated with latitude (r = 0.38), mean grass-layer height (r = 0.38), incidence of rainfall prior to sampling (r = 0.35) and presence of temporary ponds (r = 0.45). Our findings support the notion that amphibians respond to short-term environmental changes by individualistic movement within the landscape as well as via population dynamic responses
format Texto
topic_facet Anfibios
Cambio climático
Paisajes fragmentados
Zoogeografía
Artfrosur
author Ochoa Ochoa, Leticia Margarita autor/a
Whittaker, Robert James autor/a
author_facet Ochoa Ochoa, Leticia Margarita autor/a
Whittaker, Robert James autor/a
author_sort Ochoa Ochoa, Leticia Margarita autor/a
title Spatial and temporal variation in amphibian metacommunity structure in Chiapas, México
title_short Spatial and temporal variation in amphibian metacommunity structure in Chiapas, México
title_full Spatial and temporal variation in amphibian metacommunity structure in Chiapas, México
title_fullStr Spatial and temporal variation in amphibian metacommunity structure in Chiapas, México
title_full_unstemmed Spatial and temporal variation in amphibian metacommunity structure in Chiapas, México
title_sort spatial and temporal variation in amphibian metacommunity structure in chiapas, méxico
url http://journals.cambridge.org/download.php?file=%2F5186_952963E3EBFCF045371B2F12B4E18FF5_journals__TRO_TRO30_06_S0266467414000388a.pdf&cover=Y&code=d0ea9423162d55c7b810d4d41529542f
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