Temporal changes in climatic limitation of tree-growth at upper treeline forests: Contrasted responses along the west-to-east humidity gradient in Northern Patagonia
Over the last decades, gradual changes in summer climate in the Southern Hemisphere have affected forest growth in contrasting ways in moist and dry regions. Here, we use correlation analysis and a forward process-based model (Vaganov-Shashkin-Lite) to investigate changes in climate limitation of th...
| Authors: | ; ; ; |
|---|---|
| Format: | Article |
| Status: | Published version |
| Publication date: | 2015 |
| Country: | Argentina |
| Institution: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repository: | CONICET Digital (CONICET) |
| Language: | English |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/59338 |
| Online Access: | http://hdl.handle.net/11336/59338 |
| Access Level: | Open access |
| Keyword: | Dendrochronology Nothofagus Pumilio Patagonia Precipitation Gradient Vs-Lite Model https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
| _version_ | 1878403409488379904 |
|---|---|
| author | Lavergne, Aliénor |
| author2 | Daux, V. Villalba, Ricardo Barichivich, J. |
| author2_role | author author author |
| author_browse | Barichivich, J. Daux, V. Lavergne, Aliénor Villalba, Ricardo |
| author_facet | Lavergne, Aliénor Daux, V. Villalba, Ricardo Barichivich, J. |
| author_role | author |
| collection | CONICET Digital (CONICET) |
| description | Over the last decades, gradual changes in summer climate in the Southern Hemisphere have affected forest growth in contrasting ways in moist and dry regions. Here, we use correlation analysis and a forward process-based model (Vaganov-Shashkin-Lite) to investigate changes in climate limitation of the interannual tree-ring growth of Nothofagus pumilio at the upper treeline along a precipitation gradient in northern Patagonia. Patterns of climate limitation vary consistently along the gradient. At mesic and humid treelines, tree-ring growth is positively related to growing season temperature and negatively to precipitation. At xeric treelines, the opposite is observed. Moreover, the climate-growth relations are not stationary. In particular, according to the model, the step decrease in precipitation in 1952 induced an increase of the moisture limitation at the dry edge of the gradient. Correlation analyses evidence that the dependence of growth on moisture after 1952 has enhanced since 1976. While the model consistently reproduces tree-ring width variations over the 1931-1975 period, it does not capture the growth patterns in the following years. Some environmental parameters (cloudiness, snowpack, atmospheric CO2) affecting moisture, radiation and stomatal aperture may have reached thresholds beyond which the effect on tree-growth has become sizable. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | AR_78f882bf9dbbfb22ee728f070c19e6b4 |
| identifier_str_mv | Lavergne, Aliénor; Daux, V.; Villalba, Ricardo; Barichivich, J.; Temporal changes in climatic limitation of tree-growth at upper treeline forests: Contrasted responses along the west-to-east humidity gradient in Northern Patagonia; Elsevier Gmbh, Urban & Fischer Verlag; Dendrochronologia; 36; 11-2015; 49-59 1125-7865 CONICET Digital CONICET |
| institution | Consejo Nacional de Investigaciones Científicas y Técnicas |
| instname_str | Consejo Nacional de Investigaciones Científicas y Técnicas |
| language | eng |
| network_acronym_str | AR |
| network_name_str | Argentina |
| oai_identifier_str | oai:ri.conicet.gov.ar:11336/59338 |
| publishDate | 2015 |
| publishDateSort | 2015 |
| publisher | Elsevier Gmbh, Urban & Fischer Verlag |
| publisherStr | Elsevier Gmbh, Urban & Fischer Verlag |
| reponame_str | CONICET Digital (CONICET) |
| spelling | Temporal changes in climatic limitation of tree-growth at upper treeline forests: Contrasted responses along the west-to-east humidity gradient in Northern Patagonia Lavergne, Aliénor Daux, V. Villalba, Ricardo Barichivich, J. Dendrochronology Nothofagus Pumilio Patagonia Precipitation Gradient Vs-Lite Model https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 Over the last decades, gradual changes in summer climate in the Southern Hemisphere have affected forest growth in contrasting ways in moist and dry regions. Here, we use correlation analysis and a forward process-based model (Vaganov-Shashkin-Lite) to investigate changes in climate limitation of the interannual tree-ring growth of Nothofagus pumilio at the upper treeline along a precipitation gradient in northern Patagonia. Patterns of climate limitation vary consistently along the gradient. At mesic and humid treelines, tree-ring growth is positively related to growing season temperature and negatively to precipitation. At xeric treelines, the opposite is observed. Moreover, the climate-growth relations are not stationary. In particular, according to the model, the step decrease in precipitation in 1952 induced an increase of the moisture limitation at the dry edge of the gradient. Correlation analyses evidence that the dependence of growth on moisture after 1952 has enhanced since 1976. While the model consistently reproduces tree-ring width variations over the 1931-1975 period, it does not capture the growth patterns in the following years. Some environmental parameters (cloudiness, snowpack, atmospheric CO2) affecting moisture, radiation and stomatal aperture may have reached thresholds beyond which the effect on tree-growth has become sizable. Fil: Lavergne, Aliénor. Centre National de la Recherche Scientifique; Francia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina Fil: Daux, V.. Centre National de la Recherche Scientifique; Francia Fil: Villalba, Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina Fil: Barichivich, J.. Centre National de la Recherche Scientifique; Francia. University of Leeds; Francia Elsevier Gmbh, Urban & Fischer Verlag http://hdl.handle.net/11336/59338 Lavergne, Aliénor; Daux, V.; Villalba, Ricardo; Barichivich, J.; Temporal changes in climatic limitation of tree-growth at upper treeline forests: Contrasted responses along the west-to-east humidity gradient in Northern Patagonia; Elsevier Gmbh, Urban & Fischer Verlag; Dendrochronologia; 36; 11-2015; 49-59 1125-7865 CONICET Digital CONICET |
| spellingShingle | Temporal changes in climatic limitation of tree-growth at upper treeline forests: Contrasted responses along the west-to-east humidity gradient in Northern Patagonia Lavergne, Aliénor Dendrochronology Nothofagus Pumilio Patagonia Precipitation Gradient Vs-Lite Model https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
| status_str | publishedVersion |
| title | Temporal changes in climatic limitation of tree-growth at upper treeline forests: Contrasted responses along the west-to-east humidity gradient in Northern Patagonia |
| title_full | Temporal changes in climatic limitation of tree-growth at upper treeline forests: Contrasted responses along the west-to-east humidity gradient in Northern Patagonia |
| title_fullStr | Temporal changes in climatic limitation of tree-growth at upper treeline forests: Contrasted responses along the west-to-east humidity gradient in Northern Patagonia |
| title_full_unstemmed | Temporal changes in climatic limitation of tree-growth at upper treeline forests: Contrasted responses along the west-to-east humidity gradient in Northern Patagonia |
| title_short | Temporal changes in climatic limitation of tree-growth at upper treeline forests: Contrasted responses along the west-to-east humidity gradient in Northern Patagonia |
| title_sort | Temporal changes in climatic limitation of tree-growth at upper treeline forests: Contrasted responses along the west-to-east humidity gradient in Northern Patagonia |
| topic | Dendrochronology Nothofagus Pumilio Patagonia Precipitation Gradient Vs-Lite Model https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
| topic_facet | Dendrochronology Nothofagus Pumilio Patagonia Precipitation Gradient Vs-Lite Model https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
| url | http://hdl.handle.net/11336/59338 |