Lake fluctuations, plant productivity, and long term variability in high elevation tropical andean ecosystems
- Autores
- Carilla, Julieta; Grau, Hector Ricardo; Paolini, Leonardo; Morales, Mariano Santos
- Año de publicación
- 2013
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Despite the large scientific and conservation value of tropical very high elevation Andean ecosystems (above 4500 masl) little is known about environmental trends and ranges of variability. We combined satellite image analyses and dendrochronological methods to quantify changes in water balance and plant productivity of these ecosystems in northern Argentina and southern Bolivia through assessments of lake level fluctuation combined with instrumental climatic records at lower elevation; and to assess the relationships between water balance and two indices of plant productivity: tree ring width of the treelet Polylepis tarapacana and seasonal patterns of vegetation "greenness" (EVI) derived from satellite images. Between 1986 and 2007, inter-annual lake fluctuations were positively correlated with regional precipitation and de Martonne?s aridity index between, showing a decreasing trend during the period. Changes in lake size were correlated with radial growth of P. tarapacana, and with MODIS-derived annual EVI between 2001-2010; thus indicating that water balance has a significant effect on ecosystem functioning. A long term tree ring chronology indicated that recent trends of decreasing plant productivity and lakes size are still within the range of variability of the past 400 years, but such ranges may be exceeded in the coming decades if the trend persists.
Fil: Carilla, Julieta. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo; Argentina
Fil: Grau, Hector Ricardo. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo; Argentina
Fil: Paolini, Leonardo. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo; Argentina
Fil: Morales, Mariano Santos. Consejo Nacional de Investigaciones Científicas y Técnicas. Científico Tecnológico Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina - Materia
-
CLIMATE CHANGE
ECOSYSTEM PRODUCTIVITY
DENDROCHRONOLOGY
LONG TERM RECORDS - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/2721
Ver los metadatos del registro completo
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Lake fluctuations, plant productivity, and long term variability in high elevation tropical andean ecosystemsCarilla, JulietaGrau, Hector RicardoPaolini, LeonardoMorales, Mariano SantosCLIMATE CHANGEECOSYSTEM PRODUCTIVITYDENDROCHRONOLOGYLONG TERM RECORDShttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Despite the large scientific and conservation value of tropical very high elevation Andean ecosystems (above 4500 masl) little is known about environmental trends and ranges of variability. We combined satellite image analyses and dendrochronological methods to quantify changes in water balance and plant productivity of these ecosystems in northern Argentina and southern Bolivia through assessments of lake level fluctuation combined with instrumental climatic records at lower elevation; and to assess the relationships between water balance and two indices of plant productivity: tree ring width of the treelet Polylepis tarapacana and seasonal patterns of vegetation "greenness" (EVI) derived from satellite images. Between 1986 and 2007, inter-annual lake fluctuations were positively correlated with regional precipitation and de Martonne?s aridity index between, showing a decreasing trend during the period. Changes in lake size were correlated with radial growth of P. tarapacana, and with MODIS-derived annual EVI between 2001-2010; thus indicating that water balance has a significant effect on ecosystem functioning. A long term tree ring chronology indicated that recent trends of decreasing plant productivity and lakes size are still within the range of variability of the past 400 years, but such ranges may be exceeded in the coming decades if the trend persists.Fil: Carilla, Julieta. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo; ArgentinaFil: Grau, Hector Ricardo. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo; ArgentinaFil: Paolini, Leonardo. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo; ArgentinaFil: Morales, Mariano Santos. Consejo Nacional de Investigaciones Científicas y Técnicas. Científico Tecnológico Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; ArgentinaInst Arctic Alpine Res2013-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/2721Carilla, Julieta; Grau, Hector Ricardo; Paolini, Leonardo; Morales, Mariano Santos; Lake fluctuations, plant productivity, and long term variability in high elevation tropical andean ecosystems; Inst Arctic Alpine Res; Arctic Antarctic And Alpine Research; 45; 2; 5-2013; 179-1891523-04301938-4246enginfo:eu-repo/semantics/altIdentifier/doi/10.1657/1938-4246-45.2.179info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:25:29Zoai:ri.conicet.gov.ar:11336/2721instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:25:30.099CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Lake fluctuations, plant productivity, and long term variability in high elevation tropical andean ecosystems |
title |
Lake fluctuations, plant productivity, and long term variability in high elevation tropical andean ecosystems |
spellingShingle |
Lake fluctuations, plant productivity, and long term variability in high elevation tropical andean ecosystems Carilla, Julieta CLIMATE CHANGE ECOSYSTEM PRODUCTIVITY DENDROCHRONOLOGY LONG TERM RECORDS |
title_short |
Lake fluctuations, plant productivity, and long term variability in high elevation tropical andean ecosystems |
title_full |
Lake fluctuations, plant productivity, and long term variability in high elevation tropical andean ecosystems |
title_fullStr |
Lake fluctuations, plant productivity, and long term variability in high elevation tropical andean ecosystems |
title_full_unstemmed |
Lake fluctuations, plant productivity, and long term variability in high elevation tropical andean ecosystems |
title_sort |
Lake fluctuations, plant productivity, and long term variability in high elevation tropical andean ecosystems |
dc.creator.none.fl_str_mv |
Carilla, Julieta Grau, Hector Ricardo Paolini, Leonardo Morales, Mariano Santos |
author |
Carilla, Julieta |
author_facet |
Carilla, Julieta Grau, Hector Ricardo Paolini, Leonardo Morales, Mariano Santos |
author_role |
author |
author2 |
Grau, Hector Ricardo Paolini, Leonardo Morales, Mariano Santos |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
CLIMATE CHANGE ECOSYSTEM PRODUCTIVITY DENDROCHRONOLOGY LONG TERM RECORDS |
topic |
CLIMATE CHANGE ECOSYSTEM PRODUCTIVITY DENDROCHRONOLOGY LONG TERM RECORDS |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
Despite the large scientific and conservation value of tropical very high elevation Andean ecosystems (above 4500 masl) little is known about environmental trends and ranges of variability. We combined satellite image analyses and dendrochronological methods to quantify changes in water balance and plant productivity of these ecosystems in northern Argentina and southern Bolivia through assessments of lake level fluctuation combined with instrumental climatic records at lower elevation; and to assess the relationships between water balance and two indices of plant productivity: tree ring width of the treelet Polylepis tarapacana and seasonal patterns of vegetation "greenness" (EVI) derived from satellite images. Between 1986 and 2007, inter-annual lake fluctuations were positively correlated with regional precipitation and de Martonne?s aridity index between, showing a decreasing trend during the period. Changes in lake size were correlated with radial growth of P. tarapacana, and with MODIS-derived annual EVI between 2001-2010; thus indicating that water balance has a significant effect on ecosystem functioning. A long term tree ring chronology indicated that recent trends of decreasing plant productivity and lakes size are still within the range of variability of the past 400 years, but such ranges may be exceeded in the coming decades if the trend persists. Fil: Carilla, Julieta. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo; Argentina Fil: Grau, Hector Ricardo. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo; Argentina Fil: Paolini, Leonardo. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo; Argentina Fil: Morales, Mariano Santos. Consejo Nacional de Investigaciones Científicas y Técnicas. Científico Tecnológico Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina |
description |
Despite the large scientific and conservation value of tropical very high elevation Andean ecosystems (above 4500 masl) little is known about environmental trends and ranges of variability. We combined satellite image analyses and dendrochronological methods to quantify changes in water balance and plant productivity of these ecosystems in northern Argentina and southern Bolivia through assessments of lake level fluctuation combined with instrumental climatic records at lower elevation; and to assess the relationships between water balance and two indices of plant productivity: tree ring width of the treelet Polylepis tarapacana and seasonal patterns of vegetation "greenness" (EVI) derived from satellite images. Between 1986 and 2007, inter-annual lake fluctuations were positively correlated with regional precipitation and de Martonne?s aridity index between, showing a decreasing trend during the period. Changes in lake size were correlated with radial growth of P. tarapacana, and with MODIS-derived annual EVI between 2001-2010; thus indicating that water balance has a significant effect on ecosystem functioning. A long term tree ring chronology indicated that recent trends of decreasing plant productivity and lakes size are still within the range of variability of the past 400 years, but such ranges may be exceeded in the coming decades if the trend persists. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-05 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/2721 Carilla, Julieta; Grau, Hector Ricardo; Paolini, Leonardo; Morales, Mariano Santos; Lake fluctuations, plant productivity, and long term variability in high elevation tropical andean ecosystems; Inst Arctic Alpine Res; Arctic Antarctic And Alpine Research; 45; 2; 5-2013; 179-189 1523-0430 1938-4246 |
url |
http://hdl.handle.net/11336/2721 |
identifier_str_mv |
Carilla, Julieta; Grau, Hector Ricardo; Paolini, Leonardo; Morales, Mariano Santos; Lake fluctuations, plant productivity, and long term variability in high elevation tropical andean ecosystems; Inst Arctic Alpine Res; Arctic Antarctic And Alpine Research; 45; 2; 5-2013; 179-189 1523-0430 1938-4246 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1657/1938-4246-45.2.179 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Inst Arctic Alpine Res |
publisher.none.fl_str_mv |
Inst Arctic Alpine Res |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
reponame_str |
CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.name.fl_str_mv |
CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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13.070432 |