Spatio-temporal variability in ontogenetic guild structure of an intertidal fish assemblage in central Chile

Species resource use can vary throughout ontogeny, potentially affecting community dynamics. This can be particularly important for species facing high variability in environmental conditions and going through several orders of magnitude in size, as intertidal fishes. However, the influence of the r...

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Autores principales:	BERRÍOS,PATRICIA A, FARÍAS,ARIEL A, OJEDA,F. PATRICIO
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2011
Materias:	intertidal fishes ontogenetic feeding guilds spatio-temporal variability
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2011000400008
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spelling	oai:scielo:S0716-078X20110004000082012-03-28Spatio-temporal variability in ontogenetic guild structure of an intertidal fish assemblage in central ChileBERRÍOS,PATRICIA AFARÍAS,ARIEL AOJEDA,F. PATRICIO intertidal fishes ontogenetic feeding guilds spatio-temporal variability Species resource use can vary throughout ontogeny, potentially affecting community dynamics. This can be particularly important for species facing high variability in environmental conditions and going through several orders of magnitude in size, as intertidal fishes. However, the influence of the resulting ontogenetic changes in guild membership on the spatio-temporal structure of fish assemblages remains virtually unknown. Here we assessed the spatial and temporal variability in the ontogenetic feeding guild (OFG) structure of the fish assemblage inhabiting the temperate rocky intertidal zone along central Chilean coast. This was done applying principal component analysis (PCA) and randomization tests (R-test) on the relative OFG composition of fish assemblages, obtained from seasonal samples from ten pools located at two heights in the intertidal zone in three localities between 33° and 34° S. Overall, the PCA and R-tests suggest that spatial variability dominated over temporal variability in OFG structure, mainly due to a higher representation of omnivore species at high intertidal pools in two of the three sampled localities. However, phenology-related changes in the representation of fish size-classes (i.e. carnivore recruitment in spring-summer) along with ontogenetic differences in habitat selection (e.g., selection for low intertidal pools by bigger-sized carnivore OFG) contributed to both spatial and temporal differentiation in OFG structure. Finally, the relative representation of each OFG correlated with that of their dominant species, without evidence for density compensation. This suggests low levels of functional redundancy among species in each OFG, highlighting the vulnerability of assemblage functioning to size-biased disturbances as fishing.info:eu-repo/semantics/openAccessSociedad de Biología de ChileRevista chilena de historia natural v.84 n.4 20112011-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2011000400008en10.4067/S0716-078X2011000400008
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	intertidal fishes ontogenetic feeding guilds spatio-temporal variability
spellingShingle	intertidal fishes ontogenetic feeding guilds spatio-temporal variability BERRÍOS,PATRICIA A FARÍAS,ARIEL A OJEDA,F. PATRICIO Spatio-temporal variability in ontogenetic guild structure of an intertidal fish assemblage in central Chile
description	Species resource use can vary throughout ontogeny, potentially affecting community dynamics. This can be particularly important for species facing high variability in environmental conditions and going through several orders of magnitude in size, as intertidal fishes. However, the influence of the resulting ontogenetic changes in guild membership on the spatio-temporal structure of fish assemblages remains virtually unknown. Here we assessed the spatial and temporal variability in the ontogenetic feeding guild (OFG) structure of the fish assemblage inhabiting the temperate rocky intertidal zone along central Chilean coast. This was done applying principal component analysis (PCA) and randomization tests (R-test) on the relative OFG composition of fish assemblages, obtained from seasonal samples from ten pools located at two heights in the intertidal zone in three localities between 33° and 34° S. Overall, the PCA and R-tests suggest that spatial variability dominated over temporal variability in OFG structure, mainly due to a higher representation of omnivore species at high intertidal pools in two of the three sampled localities. However, phenology-related changes in the representation of fish size-classes (i.e. carnivore recruitment in spring-summer) along with ontogenetic differences in habitat selection (e.g., selection for low intertidal pools by bigger-sized carnivore OFG) contributed to both spatial and temporal differentiation in OFG structure. Finally, the relative representation of each OFG correlated with that of their dominant species, without evidence for density compensation. This suggests low levels of functional redundancy among species in each OFG, highlighting the vulnerability of assemblage functioning to size-biased disturbances as fishing.
author	BERRÍOS,PATRICIA A FARÍAS,ARIEL A OJEDA,F. PATRICIO
author_facet	BERRÍOS,PATRICIA A FARÍAS,ARIEL A OJEDA,F. PATRICIO
author_sort	BERRÍOS,PATRICIA A
title	Spatio-temporal variability in ontogenetic guild structure of an intertidal fish assemblage in central Chile
title_short	Spatio-temporal variability in ontogenetic guild structure of an intertidal fish assemblage in central Chile
title_full	Spatio-temporal variability in ontogenetic guild structure of an intertidal fish assemblage in central Chile
title_fullStr	Spatio-temporal variability in ontogenetic guild structure of an intertidal fish assemblage in central Chile
title_full_unstemmed	Spatio-temporal variability in ontogenetic guild structure of an intertidal fish assemblage in central Chile
title_sort	spatio-temporal variability in ontogenetic guild structure of an intertidal fish assemblage in central chile
publisher	Sociedad de Biología de Chile
publishDate	2011
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2011000400008
work_keys_str_mv	AT berriospatriciaa spatiotemporalvariabilityinontogeneticguildstructureofanintertidalfishassemblageincentralchile AT fariasariela spatiotemporalvariabilityinontogeneticguildstructureofanintertidalfishassemblageincentralchile AT ojedafpatricio spatiotemporalvariabilityinontogeneticguildstructureofanintertidalfishassemblageincentralchile
_version_	1718439659756847104

Spatio-temporal variability in ontogenetic guild structure of an intertidal fish assemblage in central Chile

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