Lake fluctuations, plant productivity, and long term variability in high elevation tropical andean ecosystems
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...
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ftconicet:oai:ri.conicet.gov.ar:11336/2721 2023-10-09T21:47:17+02:00 Lake fluctuations, plant productivity, and long term variability in high elevation tropical andean ecosystems Carilla, Julieta Grau, Hector Ricardo Paolini, Leonardo Morales, Mariano Santos application/pdf http://hdl.handle.net/11336/2721 eng eng Inst Arctic Alpine Res info:eu-repo/semantics/altIdentifier/doi/10.1657/1938-4246-45.2.179 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 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ CLIMATE CHANGE ECOSYSTEM PRODUCTIVITY DENDROCHRONOLOGY LONG TERM RECORDS https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1657/1938-4246-45.2.179 2023-09-24T19:59:39Z 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 Article in Journal/Newspaper Antarctic and Alpine Research Arctic CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Argentina Argentino Hector ENVELOPE(-63.376,-63.376,-64.579,-64.579) Julieta ENVELOPE(-61.358,-61.358,-64.397,-64.397) Morales ENVELOPE(-55.833,-55.833,-63.000,-63.000) Ricardo ENVELOPE(-63.033,-63.033,-64.867,-64.867) Tucumán ENVELOPE(-63.200,-63.200,-64.683,-64.683) Arctic, Antarctic, and Alpine Research 45 2 179 189 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
CLIMATE CHANGE ECOSYSTEM PRODUCTIVITY DENDROCHRONOLOGY LONG TERM RECORDS https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
CLIMATE CHANGE ECOSYSTEM PRODUCTIVITY DENDROCHRONOLOGY LONG TERM RECORDS https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Carilla, Julieta Grau, Hector Ricardo Paolini, Leonardo Morales, Mariano Santos Lake fluctuations, plant productivity, and long term variability in high elevation tropical andean ecosystems |
topic_facet |
CLIMATE CHANGE ECOSYSTEM PRODUCTIVITY DENDROCHRONOLOGY LONG TERM RECORDS https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
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. 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 |
format |
Article in Journal/Newspaper |
author |
Carilla, Julieta Grau, Hector Ricardo Paolini, Leonardo Morales, Mariano Santos |
author_facet |
Carilla, Julieta Grau, Hector Ricardo Paolini, Leonardo Morales, Mariano Santos |
author_sort |
Carilla, Julieta |
title |
Lake fluctuations, plant productivity, and long term variability in high elevation tropical andean ecosystems |
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 |
publisher |
Inst Arctic Alpine Res |
url |
http://hdl.handle.net/11336/2721 |
long_lat |
ENVELOPE(-63.376,-63.376,-64.579,-64.579) ENVELOPE(-61.358,-61.358,-64.397,-64.397) ENVELOPE(-55.833,-55.833,-63.000,-63.000) ENVELOPE(-63.033,-63.033,-64.867,-64.867) ENVELOPE(-63.200,-63.200,-64.683,-64.683) |
geographic |
Argentina Argentino Hector Julieta Morales Ricardo Tucumán |
geographic_facet |
Argentina Argentino Hector Julieta Morales Ricardo Tucumán |
genre |
Antarctic and Alpine Research Arctic |
genre_facet |
Antarctic and Alpine Research Arctic |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1657/1938-4246-45.2.179 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 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1657/1938-4246-45.2.179 |
container_title |
Arctic, Antarctic, and Alpine Research |
container_volume |
45 |
container_issue |
2 |
container_start_page |
179 |
op_container_end_page |
189 |
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1779310292138721280 |