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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2014
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00759511_v44_n_p72_Rocchetta http://hdl.handle.net/20.500.12110/paper_00759511_v44_n_p72_Rocchetta |
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paper:paper_00759511_v44_n_p72_Rocchetta2023-06-08T15:07:14Z 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, Iara Lomovasky, Betina Judith Yusseppone, María Soledad Sabatini, Sebastián Eduardo Ríos de Molina, María del Carmen Luquet, Carlos Marcelo 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. 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00759511_v44_n_p72_Rocchetta 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, Iara Lomovasky, Betina Judith Yusseppone, María Soledad Sabatini, Sebastián Eduardo Ríos de Molina, María del Carmen Luquet, Carlos Marcelo 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. |
| author |
Rocchetta, Iara Lomovasky, Betina Judith Yusseppone, María Soledad Sabatini, Sebastián Eduardo Ríos de Molina, María del Carmen Luquet, Carlos Marcelo |
| author_facet |
Rocchetta, Iara Lomovasky, Betina Judith Yusseppone, María Soledad Sabatini, Sebastián Eduardo Ríos de Molina, María del Carmen Luquet, Carlos Marcelo |
| author_sort |
Rocchetta, Iara |
| 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 |
| publishDate |
2014 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00759511_v44_n_p72_Rocchetta http://hdl.handle.net/20.500.12110/paper_00759511_v44_n_p72_Rocchetta |
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