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
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/2721
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/2721
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling 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 Técnicas2025-10-22T11:58:11Zoai: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:34982025-10-22 11:58:11.982CONICET 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
_version_ 1846782295622549504
score 12.982451

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