Growth, abundance, morphometric and metabolic parameters of three populations of Diplodon chilensis subject to different levels of natural and anthropogenic organic matter input in a glaciar lake of North Patagonia

Three populations of Diplodon chilensis (Hiridae, Bivalvia) from North Patagonia (Lacar lake, Argentina) have been studied to determine how organic matter (OM) influence their growth, density, morphometric and metabolic parameters in two pristine sites (Yuco and Nonthué) and in a growing touristic l...

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Autores principales: Rocchetta, I., Lomovasky, B.J., Yusseppone, M.S., Sabatini, S.E., Bieczynski, F., Ríos de Molina, M.C., Luquet, C.M.
Formato: JOUR
Materias:
Allochthonous organic matter
Anthropogenic impact
Freshwater bivalves
Growth rates
Population parameters
Sewage pollution
abundance
allometry
anthropogenic effect
enzyme activity
glacial lake
growth rate
metabolism
mollusc
morphometry
mortality
organic matter
organic pollutant
pollution effect
population density
population dynamics
population size
survival
Argentina
Lacar Lake
Neuquen
Patagonia
Bivalvia
Diplodon chilensis
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00759511_v44_n_p72_Rocchetta
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_00759511_v44_n_p72_Rocchetta2023-10-03T14:54:04Z Growth, abundance, morphometric and metabolic parameters of three populations of Diplodon chilensis subject to different levels of natural and anthropogenic organic matter input in a glaciar lake of North Patagonia Rocchetta, I. Lomovasky, B.J. Yusseppone, M.S. Sabatini, S.E. Bieczynski, F. Ríos de Molina, M.C. Luquet, C.M. Allochthonous organic matter Anthropogenic impact Freshwater bivalves Growth rates Population parameters Sewage pollution abundance allometry anthropogenic effect enzyme activity glacial lake growth rate metabolism mollusc morphometry mortality organic matter organic pollutant pollution effect population density population dynamics population size survival Argentina Lacar Lake Neuquen Patagonia Bivalvia Diplodon chilensis Three populations of Diplodon chilensis (Hiridae, Bivalvia) from North Patagonia (Lacar lake, Argentina) have been studied to determine how organic matter (OM) influence their growth, density, morphometric and metabolic parameters in two pristine sites (Yuco and Nonthué) and in a growing touristic locality (San Martín de los Andes Bay, site SMA) affected by urban discharges. In Nonthué (chemical and biological oxygen demand ratio COD/BOD ratio of 4.7), a dense neighboring forest provides higher quantities of vegetal detritus compared to Yuco, while in SMA the OM input increase is related to anthropogenic impact, mainly sewage discharges, which is more biodegradable (COD/BOD ratio of 1.7). Our results show that population's size distribution and growth rates are affected positively by increased OM, independently of its natural or anthropogenic origin. The modal shell length interval for SMA and Nonthué is two-fold higher (70mm), in agreement to the growth rate increase (k=0.079), compared to Yuco (35mm, k=0.045). The morphometric relationships between size-size and size-mass show a higher slope for SMA and Nonthué, which underline allometric differences between these two populations and the Yuco's one. The lower population densities in both sites (SMA 33ind./m2 and Nonthué 76ind./m2) compare to Yuco (176ind./m2) and the absence of individuals younger than 7 and 5 years old, respectively, in SMA and Nonthué could be related to the higher allochthonous OM content in the sediments and total suspended solids in water. Increased OM due to urban pollution in SMA bivalves leads to higher oxidative damage to lipids, which is not counterbalanced by the higher detoxification enzyme glutathione-S-transferase activity. Hence, we can conclude that pollution would explain the drastic reduction in population density, probably related to a high impair in the juvenile's survival/recruitment, the higher observed mortality and the lower population longevity. When increased OM is supply by the forest, like in Nonthué, this has less negative effect on population density and no effect on longevity at all. However, a negative effect of oxygen depletion due to increased OM (either anthropogenic or natural) on juvenile survival cannot be discarded, but further studies should be carried out to support this idea. © 2013 Elsevier GmbH. Fil:Rocchetta, I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Lomovasky, B.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Yusseppone, M.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Sabatini, S.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Ríos de Molina, M.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Luquet, C.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00759511_v44_n_p72_Rocchetta
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Allochthonous organic matter
Anthropogenic impact
Freshwater bivalves
Growth rates
Population parameters
Sewage pollution
abundance
allometry
anthropogenic effect
enzyme activity
glacial lake
growth rate
metabolism
mollusc
morphometry
mortality
organic matter
organic pollutant
pollution effect
population density
population dynamics
population size
survival
Argentina
Lacar Lake
Neuquen
Patagonia
Bivalvia
Diplodon chilensis
spellingShingle Allochthonous organic matter
Anthropogenic impact
Freshwater bivalves
Growth rates
Population parameters
Sewage pollution
abundance
allometry
anthropogenic effect
enzyme activity
glacial lake
growth rate
metabolism
mollusc
morphometry
mortality
organic matter
organic pollutant
pollution effect
population density
population dynamics
population size
survival
Argentina
Lacar Lake
Neuquen
Patagonia
Bivalvia
Diplodon chilensis
Rocchetta, I.
Lomovasky, B.J.
Yusseppone, M.S.
Sabatini, S.E.
Bieczynski, F.
Ríos de Molina, M.C.
Luquet, C.M.
Growth, abundance, morphometric and metabolic parameters of three populations of Diplodon chilensis subject to different levels of natural and anthropogenic organic matter input in a glaciar lake of North Patagonia
topic_facet Allochthonous organic matter
Anthropogenic impact
Freshwater bivalves
Growth rates
Population parameters
Sewage pollution
abundance
allometry
anthropogenic effect
enzyme activity
glacial lake
growth rate
metabolism
mollusc
morphometry
mortality
organic matter
organic pollutant
pollution effect
population density
population dynamics
population size
survival
Argentina
Lacar Lake
Neuquen
Patagonia
Bivalvia
Diplodon chilensis
description Three populations of Diplodon chilensis (Hiridae, Bivalvia) from North Patagonia (Lacar lake, Argentina) have been studied to determine how organic matter (OM) influence their growth, density, morphometric and metabolic parameters in two pristine sites (Yuco and Nonthué) and in a growing touristic locality (San Martín de los Andes Bay, site SMA) affected by urban discharges. In Nonthué (chemical and biological oxygen demand ratio COD/BOD ratio of 4.7), a dense neighboring forest provides higher quantities of vegetal detritus compared to Yuco, while in SMA the OM input increase is related to anthropogenic impact, mainly sewage discharges, which is more biodegradable (COD/BOD ratio of 1.7). Our results show that population's size distribution and growth rates are affected positively by increased OM, independently of its natural or anthropogenic origin. The modal shell length interval for SMA and Nonthué is two-fold higher (70mm), in agreement to the growth rate increase (k=0.079), compared to Yuco (35mm, k=0.045). The morphometric relationships between size-size and size-mass show a higher slope for SMA and Nonthué, which underline allometric differences between these two populations and the Yuco's one. The lower population densities in both sites (SMA 33ind./m2 and Nonthué 76ind./m2) compare to Yuco (176ind./m2) and the absence of individuals younger than 7 and 5 years old, respectively, in SMA and Nonthué could be related to the higher allochthonous OM content in the sediments and total suspended solids in water. Increased OM due to urban pollution in SMA bivalves leads to higher oxidative damage to lipids, which is not counterbalanced by the higher detoxification enzyme glutathione-S-transferase activity. Hence, we can conclude that pollution would explain the drastic reduction in population density, probably related to a high impair in the juvenile's survival/recruitment, the higher observed mortality and the lower population longevity. When increased OM is supply by the forest, like in Nonthué, this has less negative effect on population density and no effect on longevity at all. However, a negative effect of oxygen depletion due to increased OM (either anthropogenic or natural) on juvenile survival cannot be discarded, but further studies should be carried out to support this idea. © 2013 Elsevier GmbH.
format JOUR
author Rocchetta, I.
Lomovasky, B.J.
Yusseppone, M.S.
Sabatini, S.E.
Bieczynski, F.
Ríos de Molina, M.C.
Luquet, C.M.
author_facet Rocchetta, I.
Lomovasky, B.J.
Yusseppone, M.S.
Sabatini, S.E.
Bieczynski, F.
Ríos de Molina, M.C.
Luquet, C.M.
author_sort Rocchetta, I.
title Growth, abundance, morphometric and metabolic parameters of three populations of Diplodon chilensis subject to different levels of natural and anthropogenic organic matter input in a glaciar lake of North Patagonia
title_short Growth, abundance, morphometric and metabolic parameters of three populations of Diplodon chilensis subject to different levels of natural and anthropogenic organic matter input in a glaciar lake of North Patagonia
title_full Growth, abundance, morphometric and metabolic parameters of three populations of Diplodon chilensis subject to different levels of natural and anthropogenic organic matter input in a glaciar lake of North Patagonia
title_fullStr Growth, abundance, morphometric and metabolic parameters of three populations of Diplodon chilensis subject to different levels of natural and anthropogenic organic matter input in a glaciar lake of North Patagonia
title_full_unstemmed Growth, abundance, morphometric and metabolic parameters of three populations of Diplodon chilensis subject to different levels of natural and anthropogenic organic matter input in a glaciar lake of North Patagonia
title_sort growth, abundance, morphometric and metabolic parameters of three populations of diplodon chilensis subject to different levels of natural and anthropogenic organic matter input in a glaciar lake of north patagonia
url http://hdl.handle.net/20.500.12110/paper_00759511_v44_n_p72_Rocchetta
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