Changes in the natural dynamics of Nothofagus dombeyi forests

Drought-induced episodes of tree mortality can determine forest dynamics and structure, particularly in forests dominated by single species. Short- and mid-term climate projections indicate that strong changes in annual precipitation may strike more often in northern Patagonia. Data for recruitment,...

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Authors: Molowny Horas, Roberto|||0000-0003-2626-6379, Suarez, Maria Laura|||0000-0002-2737-6409, Lloret, Francisco|||0000-0002-9836-4069
Format: article
Publication Date:2017
Country:España
Institution:Universitat Autònoma de Barcelona
Repository:Dipòsit Digital de Documents de la UAB
Language:English
OAI Identifier:oai:ddd.uab.cat:180498
Online Access:https://ddd.uab.cat/record/180498
https://dx.doi.org/urn:doi:10.1002/ecs2.1708
Access Level:Open access
Keyword:Austral forests
Climate change
Drought episodes
Forest dieback
Nothofagus dombeyi
Population dynamics modeling
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spelling Changes in the natural dynamics of Nothofagus dombeyi forestspopulation modeling with increasing drought frequenciesMolowny Horas, Roberto|||0000-0003-2626-6379Suarez, Maria Laura|||0000-0002-2737-6409Lloret, Francisco|||0000-0002-9836-4069Austral forestsClimate changeDrought episodesForest diebackNothofagus dombeyiPopulation dynamics modelingDrought-induced episodes of tree mortality can determine forest dynamics and structure, particularly in forests dominated by single species. Short- and mid-term climate projections indicate that strong changes in annual precipitation may strike more often in northern Patagonia. Data for recruitment, growth, and survival of Nothofagus dombeyi tree individuals were collected at several sites across the Nahuel Huapi National Park in Argentina. We combined mathematically all these different demographic stages into an Integral Projection Model to simulate 100-yr projections of simulated stand structure under different frequencies of extreme drought episodes. We projected total basal area and the number of individuals for three different initial stand types (i.e., young, medium, and old) and for varying drought frequencies (i.e., from 1 to 5 drought events every 100 years). Recruitment into the dbh ≥ 10 cm size class under normal conditions (i.e., without drought) was higher than under episodic drought conditions. In addition, survival under normal conditions was higher than under drought conditions, especially for small trees. Differences in growth were also important, with trees growing more vigorously under normal than under drought conditions. Our simulations predicted that N. dombeyi populations would experience a reduction in tree density in the mid-term if, as predicted by the IPCC projections, the frequency of future drought events increased. The simulations also showed that in those cases, young stands should suffer the most. Drought-mediated changes may induce a decline in the development of N. dombeyi forests in the mid- and long term by a drastic reduction in tree density. 22017-01-0120172017-01-01Articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/180498https://dx.doi.org/urn:doi:10.1002/ecs2.1708reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengMinisterio de Economía y Competitividad https://doi.org/10.13039/501100003329 CGL2015-67419-RMinisterio de Economía y Competitividad https://doi.org/10.13039/501100003329 GL2012-32965open accesshttp://purl.org/coar/access_right/c_abf2Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.https://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:1804982026-06-06T12:50:31Z
dc.title.none.fl_str_mv Changes in the natural dynamics of Nothofagus dombeyi forests
population modeling with increasing drought frequencies
title Changes in the natural dynamics of Nothofagus dombeyi forests
spellingShingle Changes in the natural dynamics of Nothofagus dombeyi forests
Molowny Horas, Roberto|||0000-0003-2626-6379
Austral forests
Climate change
Drought episodes
Forest dieback
Nothofagus dombeyi
Population dynamics modeling
title_short Changes in the natural dynamics of Nothofagus dombeyi forests
title_full Changes in the natural dynamics of Nothofagus dombeyi forests
title_fullStr Changes in the natural dynamics of Nothofagus dombeyi forests
title_full_unstemmed Changes in the natural dynamics of Nothofagus dombeyi forests
title_sort Changes in the natural dynamics of Nothofagus dombeyi forests
dc.creator.none.fl_str_mv Molowny Horas, Roberto|||0000-0003-2626-6379
Suarez, Maria Laura|||0000-0002-2737-6409
Lloret, Francisco|||0000-0002-9836-4069
author Molowny Horas, Roberto|||0000-0003-2626-6379
author_facet Molowny Horas, Roberto|||0000-0003-2626-6379
Suarez, Maria Laura|||0000-0002-2737-6409
Lloret, Francisco|||0000-0002-9836-4069
author_role author
author2 Suarez, Maria Laura|||0000-0002-2737-6409
Lloret, Francisco|||0000-0002-9836-4069
author2_role author
author
dc.subject.none.fl_str_mv Austral forests
Climate change
Drought episodes
Forest dieback
Nothofagus dombeyi
Population dynamics modeling
topic Austral forests
Climate change
Drought episodes
Forest dieback
Nothofagus dombeyi
Population dynamics modeling
description Drought-induced episodes of tree mortality can determine forest dynamics and structure, particularly in forests dominated by single species. Short- and mid-term climate projections indicate that strong changes in annual precipitation may strike more often in northern Patagonia. Data for recruitment, growth, and survival of Nothofagus dombeyi tree individuals were collected at several sites across the Nahuel Huapi National Park in Argentina. We combined mathematically all these different demographic stages into an Integral Projection Model to simulate 100-yr projections of simulated stand structure under different frequencies of extreme drought episodes. We projected total basal area and the number of individuals for three different initial stand types (i.e., young, medium, and old) and for varying drought frequencies (i.e., from 1 to 5 drought events every 100 years). Recruitment into the dbh ≥ 10 cm size class under normal conditions (i.e., without drought) was higher than under episodic drought conditions. In addition, survival under normal conditions was higher than under drought conditions, especially for small trees. Differences in growth were also important, with trees growing more vigorously under normal than under drought conditions. Our simulations predicted that N. dombeyi populations would experience a reduction in tree density in the mid-term if, as predicted by the IPCC projections, the frequency of future drought events increased. The simulations also showed that in those cases, young stands should suffer the most. Drought-mediated changes may induce a decline in the development of N. dombeyi forests in the mid- and long term by a drastic reduction in tree density.
publishDate 2017
dc.date.none.fl_str_mv 2
2017-01-01
2017
2017-01-01
dc.type.none.fl_str_mv Article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://ddd.uab.cat/record/180498
https://dx.doi.org/urn:doi:10.1002/ecs2.1708
url https://ddd.uab.cat/record/180498
https://dx.doi.org/urn:doi:10.1002/ecs2.1708
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Ministerio de Economía y Competitividad https://doi.org/10.13039/501100003329 CGL2015-67419-R
Ministerio de Economía y Competitividad https://doi.org/10.13039/501100003329 GL2012-32965
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://creativecommons.org/licenses/by/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Dipòsit Digital de Documents de la UAB
instname:Universitat Autònoma de Barcelona
instname_str Universitat Autònoma de Barcelona
reponame_str Dipòsit Digital de Documents de la UAB
collection Dipòsit Digital de Documents de la UAB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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