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Environmental and Organismal Predictors of Intraspecific Variation in the Stoichiometry of a Neotropical Freshwater Fish

The elemental composition of animals, or their organismal stoichiometry, is thought to constrain their contribution to nutrient recycling, their interactions with other animals, and their demographic rates. Factors that affect organismal stoichiometry are generally poorly understood, but likely refl...

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Autores principales: El-Sabaawi, Rana W., Kohler, Tyler J., Zandoná, Eugenia, Travis, Joseph, Marshall, Michael C., Thomas, Steven A., Reznick, David N., Walsh, Matthew, Gilliam, James F., Pringle, Catherine, Flecker, Alexander S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3295771/
https://www.ncbi.nlm.nih.gov/pubmed/22412911
http://dx.doi.org/10.1371/journal.pone.0032713
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author El-Sabaawi, Rana W.
Kohler, Tyler J.
Zandoná, Eugenia
Travis, Joseph
Marshall, Michael C.
Thomas, Steven A.
Reznick, David N.
Walsh, Matthew
Gilliam, James F.
Pringle, Catherine
Flecker, Alexander S.
author_facet El-Sabaawi, Rana W.
Kohler, Tyler J.
Zandoná, Eugenia
Travis, Joseph
Marshall, Michael C.
Thomas, Steven A.
Reznick, David N.
Walsh, Matthew
Gilliam, James F.
Pringle, Catherine
Flecker, Alexander S.
author_sort El-Sabaawi, Rana W.
collection PubMed
description The elemental composition of animals, or their organismal stoichiometry, is thought to constrain their contribution to nutrient recycling, their interactions with other animals, and their demographic rates. Factors that affect organismal stoichiometry are generally poorly understood, but likely reflect elemental investments in morphological features and life history traits, acting in concert with the environmental availability of elements. We assessed the relative contribution of organismal traits and environmental variability to the stoichiometry of an insectivorous Neotropical stream fish, Rivulus hartii. We characterized the influence of body size, life history phenotype, stage of maturity, and environmental variability on organismal stoichiometry in 6 streams that differ in a broad suite of environmental variables. The elemental composition of R. hartii was variable, and overlapped with the wide range of elemental composition documented across freshwater fish taxa. Average %P composition was ∼3.2%(±0.6), average %N∼10.7%(±0.9), and average %C∼41.7%(±3.1). Streams were the strongest predictor of organismal stoichiometry, and explained up to 18% of the overall variance. This effect appeared to be largely explained by variability in quality of basal resources such as epilithon N∶P and benthic organic matter C∶N, along with variability in invertebrate standing stocks, an important food source for R. hartii. Organismal traits were weak predictors of organismal stoichiometry in this species, explaining when combined up to 7% of the overall variance in stoichiometry. Body size was significantly and positively correlated with %P, and negatively with N∶P, and C∶P, and life history phenotype was significantly correlated with %C, %P, C∶P and C∶N. Our study suggests that spatial variability in elemental availability is more strongly correlated with organismal stoichiometry than organismal traits, and suggests that the stoichiometry of carnivores may not be completely buffered from environmental variability. We discuss the relevance of these findings to ecological stoichiometry theory.
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spelling pubmed-32957712012-03-12 Environmental and Organismal Predictors of Intraspecific Variation in the Stoichiometry of a Neotropical Freshwater Fish El-Sabaawi, Rana W. Kohler, Tyler J. Zandoná, Eugenia Travis, Joseph Marshall, Michael C. Thomas, Steven A. Reznick, David N. Walsh, Matthew Gilliam, James F. Pringle, Catherine Flecker, Alexander S. PLoS One Research Article The elemental composition of animals, or their organismal stoichiometry, is thought to constrain their contribution to nutrient recycling, their interactions with other animals, and their demographic rates. Factors that affect organismal stoichiometry are generally poorly understood, but likely reflect elemental investments in morphological features and life history traits, acting in concert with the environmental availability of elements. We assessed the relative contribution of organismal traits and environmental variability to the stoichiometry of an insectivorous Neotropical stream fish, Rivulus hartii. We characterized the influence of body size, life history phenotype, stage of maturity, and environmental variability on organismal stoichiometry in 6 streams that differ in a broad suite of environmental variables. The elemental composition of R. hartii was variable, and overlapped with the wide range of elemental composition documented across freshwater fish taxa. Average %P composition was ∼3.2%(±0.6), average %N∼10.7%(±0.9), and average %C∼41.7%(±3.1). Streams were the strongest predictor of organismal stoichiometry, and explained up to 18% of the overall variance. This effect appeared to be largely explained by variability in quality of basal resources such as epilithon N∶P and benthic organic matter C∶N, along with variability in invertebrate standing stocks, an important food source for R. hartii. Organismal traits were weak predictors of organismal stoichiometry in this species, explaining when combined up to 7% of the overall variance in stoichiometry. Body size was significantly and positively correlated with %P, and negatively with N∶P, and C∶P, and life history phenotype was significantly correlated with %C, %P, C∶P and C∶N. Our study suggests that spatial variability in elemental availability is more strongly correlated with organismal stoichiometry than organismal traits, and suggests that the stoichiometry of carnivores may not be completely buffered from environmental variability. We discuss the relevance of these findings to ecological stoichiometry theory. Public Library of Science 2012-03-06 /pmc/articles/PMC3295771/ /pubmed/22412911 http://dx.doi.org/10.1371/journal.pone.0032713 Text en El-Sabaawi et al. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
spellingShingle Research Article
El-Sabaawi, Rana W.
Kohler, Tyler J.
Zandoná, Eugenia
Travis, Joseph
Marshall, Michael C.
Thomas, Steven A.
Reznick, David N.
Walsh, Matthew
Gilliam, James F.
Pringle, Catherine
Flecker, Alexander S.
Environmental and Organismal Predictors of Intraspecific Variation in the Stoichiometry of a Neotropical Freshwater Fish
title Environmental and Organismal Predictors of Intraspecific Variation in the Stoichiometry of a Neotropical Freshwater Fish
title_full Environmental and Organismal Predictors of Intraspecific Variation in the Stoichiometry of a Neotropical Freshwater Fish
title_fullStr Environmental and Organismal Predictors of Intraspecific Variation in the Stoichiometry of a Neotropical Freshwater Fish
title_full_unstemmed Environmental and Organismal Predictors of Intraspecific Variation in the Stoichiometry of a Neotropical Freshwater Fish
title_short Environmental and Organismal Predictors of Intraspecific Variation in the Stoichiometry of a Neotropical Freshwater Fish
title_sort environmental and organismal predictors of intraspecific variation in the stoichiometry of a neotropical freshwater fish
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3295771/
https://www.ncbi.nlm.nih.gov/pubmed/22412911
http://dx.doi.org/10.1371/journal.pone.0032713
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