Contrasting responses of lake ecosystems to environmental disturbance: a paleoecological perspective from northern Patagonia (Argentina)

Paleoecological studies are crucial for understanding ecosystem disturbance and resilience dynamics. However, nearly all the research related to the response of aquatic communities to disturbances has been developed at short-term ecological scales. In this study, we investigate the long-term respons...

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Autores principales: Massaferro, Julieta, Correa Metrio, Alexander, Montes de Oca, Fernanda, Mauad, Melina
Formato: Articulo
Lenguaje:Inglés
Publicado: 2018
Materias:
Ciencias Naturales
Paleoecology
Freshwater
Chironomid assemblages
Tephra layers
Disturbances
Resilience
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/132522
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-132522
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Paleoecology
Freshwater
Chironomid assemblages
Tephra layers
Disturbances
Resilience
spellingShingle Ciencias Naturales
Paleoecology
Freshwater
Chironomid assemblages
Tephra layers
Disturbances
Resilience
Massaferro, Julieta
Correa Metrio, Alexander
Montes de Oca, Fernanda
Mauad, Melina
Contrasting responses of lake ecosystems to environmental disturbance: a paleoecological perspective from northern Patagonia (Argentina)
topic_facet Ciencias Naturales
Paleoecology
Freshwater
Chironomid assemblages
Tephra layers
Disturbances
Resilience
description Paleoecological studies are crucial for understanding ecosystem disturbance and resilience dynamics. However, nearly all the research related to the response of aquatic communities to disturbances has been developed at short-term ecological scales. In this study, we investigate the long-term response of chironomid insects of two lakes, to volcanic and other environmental disturbances that have taken place during the last 200 years. The studied lakes, Lake Verde and Lake Toncek, are located in the Nahuel Huapi National Park (northern Patagonia, Argentina), under contrasting environmental settings. Our results show that the main driver of faunal changes in both lakes is volcanism. Indeed, after the impact of the 1960 Puyehue/Calbuco volcanic events, the chironomid assemblage of Lake Verde recovered to initial conditions showing high resistance and a strong resilience to the impact. In this lake, the canopy, the presence of macrophytes, and the dynamic of the watershed are important determinants of resilience providing habitats for species colonization and/or by giving refugia to the community. Contrarily, chironomid assemblages from Lake Toncek did not recover to the original state after the impact of the ash. This lake is located above the tree line, and therefore it is highly probable that the lack of vegetation cover in the basin offered no protection for the aquatic environment, leaving the ecosystem highly exposed to the effect of the volcanic ashes. Subordinate to the effects of the volcanism, rising temperatures in the last 50 years and/or increasing human activities in the area, especially in L. Toncek, may also be responsible for the changes in chironomid assemblages.
format Articulo
Articulo
author Massaferro, Julieta
Correa Metrio, Alexander
Montes de Oca, Fernanda
Mauad, Melina
author_facet Massaferro, Julieta
Correa Metrio, Alexander
Montes de Oca, Fernanda
Mauad, Melina
author_sort Massaferro, Julieta
title Contrasting responses of lake ecosystems to environmental disturbance: a paleoecological perspective from northern Patagonia (Argentina)
title_short Contrasting responses of lake ecosystems to environmental disturbance: a paleoecological perspective from northern Patagonia (Argentina)
title_full Contrasting responses of lake ecosystems to environmental disturbance: a paleoecological perspective from northern Patagonia (Argentina)
title_fullStr Contrasting responses of lake ecosystems to environmental disturbance: a paleoecological perspective from northern Patagonia (Argentina)
title_full_unstemmed Contrasting responses of lake ecosystems to environmental disturbance: a paleoecological perspective from northern Patagonia (Argentina)
title_sort contrasting responses of lake ecosystems to environmental disturbance: a paleoecological perspective from northern patagonia (argentina)
publishDate 2018
url http://sedici.unlp.edu.ar/handle/10915/132522
work_keys_str_mv AT massaferrojulieta contrastingresponsesoflakeecosystemstoenvironmentaldisturbanceapaleoecologicalperspectivefromnorthernpatagoniaargentina
AT correametrioalexander contrastingresponsesoflakeecosystemstoenvironmentaldisturbanceapaleoecologicalperspectivefromnorthernpatagoniaargentina
AT montesdeocafernanda contrastingresponsesoflakeecosystemstoenvironmentaldisturbanceapaleoecologicalperspectivefromnorthernpatagoniaargentina
AT mauadmelina contrastingresponsesoflakeecosystemstoenvironmentaldisturbanceapaleoecologicalperspectivefromnorthernpatagoniaargentina
bdutipo_str Repositorios
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