A trophic characterization of intertidal consumers on Chilean rocky shores

In the last 50 years, the trophic role of consumers has become a main research topic in the ecology of Chilean rocky shores, and in other regions. Several studies have typified species of echinoderms, crustaceans and mollusks as the most important herbivores and carnivores of intertidal assemblages....

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Autores principales:	Camus,Patricio A, Arancibia,Paulina A, Ávila-Thieme,Isidora
Lenguaje:	English
Publicado:	Universidad de Valparaíso. Facultad de Ciencias del Mar 2013
Materias:	Diet niche width individual specialization omnivory body size
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572013000300003
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spelling	oai:scielo:S0718-195720130003000032014-04-08A trophic characterization of intertidal consumers on Chilean rocky shoresCamus,Patricio AArancibia,Paulina AÁvila-Thieme,Isidora Diet niche width individual specialization omnivory body size In the last 50 years, the trophic role of consumers has become a main research topic in the ecology of Chilean rocky shores, and in other regions. Several studies have typified species of echinoderms, crustaceans and mollusks as the most important herbivores and carnivores of intertidal assemblages. Unfortunately, little is known about the diet and behavior of many consumers, making difficult addressing key issues related to the importance of omnivory, intra- and inter-specific competition, or individual specialization. The goal of this paper is to fill some gaps in the available information and provide researchers with an exhaustive dietary analysis and relevant ecological descriptors for a suite of 30 consumer species distributed along the southeastern Pacific coast. Our data integrate information collected through seasonal samplings conducted between 2004 and 2007 at 4 localities distributed over 1,000 km of coast in northern Chile. Based on laboratory and field work analysis, we present: (a) a consumer-resource matrix obtained from high-resolution analyses of gut contents of 6,377 individuals, including 222 prey items (80% identified at species or genus level); (b) estimates of the density, body size (length and weight), diet width (at individual and species levels), and within-individual diversity of consumer species; (c) an nMDS ordination of the compositional similarity of consumers' diets, and information on the relative importance and occurrence frequency of the most common preys of each consumer. Based on the high frequency of omnivory and the high diet overlap among consumers, we discuss their potential for competition and the role of individual specialization in shaping their generalist character, highlighting the need to reappraise their behavior and ecological effects in the intertidal community.info:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.48 n.3 20132013-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572013000300003en10.4067/S0718-19572013000300003
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Diet niche width individual specialization omnivory body size
spellingShingle	Diet niche width individual specialization omnivory body size Camus,Patricio A Arancibia,Paulina A Ávila-Thieme,Isidora A trophic characterization of intertidal consumers on Chilean rocky shores
description	In the last 50 years, the trophic role of consumers has become a main research topic in the ecology of Chilean rocky shores, and in other regions. Several studies have typified species of echinoderms, crustaceans and mollusks as the most important herbivores and carnivores of intertidal assemblages. Unfortunately, little is known about the diet and behavior of many consumers, making difficult addressing key issues related to the importance of omnivory, intra- and inter-specific competition, or individual specialization. The goal of this paper is to fill some gaps in the available information and provide researchers with an exhaustive dietary analysis and relevant ecological descriptors for a suite of 30 consumer species distributed along the southeastern Pacific coast. Our data integrate information collected through seasonal samplings conducted between 2004 and 2007 at 4 localities distributed over 1,000 km of coast in northern Chile. Based on laboratory and field work analysis, we present: (a) a consumer-resource matrix obtained from high-resolution analyses of gut contents of 6,377 individuals, including 222 prey items (80% identified at species or genus level); (b) estimates of the density, body size (length and weight), diet width (at individual and species levels), and within-individual diversity of consumer species; (c) an nMDS ordination of the compositional similarity of consumers' diets, and information on the relative importance and occurrence frequency of the most common preys of each consumer. Based on the high frequency of omnivory and the high diet overlap among consumers, we discuss their potential for competition and the role of individual specialization in shaping their generalist character, highlighting the need to reappraise their behavior and ecological effects in the intertidal community.
author	Camus,Patricio A Arancibia,Paulina A Ávila-Thieme,Isidora
author_facet	Camus,Patricio A Arancibia,Paulina A Ávila-Thieme,Isidora
author_sort	Camus,Patricio A
title	A trophic characterization of intertidal consumers on Chilean rocky shores
title_short	A trophic characterization of intertidal consumers on Chilean rocky shores
title_full	A trophic characterization of intertidal consumers on Chilean rocky shores
title_fullStr	A trophic characterization of intertidal consumers on Chilean rocky shores
title_full_unstemmed	A trophic characterization of intertidal consumers on Chilean rocky shores
title_sort	trophic characterization of intertidal consumers on chilean rocky shores
publisher	Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate	2013
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572013000300003
work_keys_str_mv	AT camuspatricioa atrophiccharacterizationofintertidalconsumersonchileanrockyshores AT arancibiapaulinaa atrophiccharacterizationofintertidalconsumersonchileanrockyshores AT avilathiemeisidora atrophiccharacterizationofintertidalconsumersonchileanrockyshores AT camuspatricioa trophiccharacterizationofintertidalconsumersonchileanrockyshores AT arancibiapaulinaa trophiccharacterizationofintertidalconsumersonchileanrockyshores AT avilathiemeisidora trophiccharacterizationofintertidalconsumersonchileanrockyshores
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A trophic characterization of intertidal consumers on Chilean rocky shores

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