Crack willow changing riverine landscapes in Patagonia

In Patagonia (Argentina) in recent decades, the exotic species and hybrids of Salix alba - Salix fragilis complex has spread over wide areas along watercourses, taking advantage of it is sexually and vegetatively propagation. It out-competes with native vegetation, facilitated by stochastic events r...

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Autores principales: Datri, Leonardo, Faggi, Ana, Gallo, Leonardo Ariel
Formato: Artículo acceptedVersion
Lenguaje:Inglés
Publicado: Wiley 2017
Materias:
SAUCES
HIDROLOGIA
Acceso en línea:https://hdl.handle.net/20.500.14340/1145
Aporte de:
Repositorio institucional de la Universidad de Flores de Universidad de Flores
id I89-R270-20.500.14340-1145
record_format dspace
spelling I89-R270-20.500.14340-11452025-02-13T18:48:55Z https://hdl.handle.net/20.500.14340/1145 doi:https://doi.org/10.1002/eco.1837 Crack willow changing riverine landscapes in Patagonia 2017 Datri, Leonardo Faggi, Ana Gallo, Leonardo Ariel Wiley eng SAUCES HIDROLOGIA In Patagonia (Argentina) in recent decades, the exotic species and hybrids of Salix alba - Salix fragilis complex has spread over wide areas along watercourses, taking advantage of it is sexually and vegetatively propagation. It out-competes with native vegetation, facilitated by stochastic events related to large floods of long-lasting duration higher than the average maximum of 186 m3/sec for more than a day. We analysed the exotic willow’s increase along the braiding Azul River, and the hydrological regime between 1966 and 2012. We evaluated the links between regime and tree density over time using dendrochronological data. Results showed an increase of the forest’s cover from 2.1% to 70.8% over the last 46 years. The densities of exotic willows grew exponentially between 1966 and 1973, during a period which was free of higher floods. The initial native populations declined as willow’s population increased. Up to 1973 there was an increase in the native populations too. Then from 1974 on, the willow showed a gradual growth coupled with a decline in the native trees. Up 1977 the willow expansion could be linked to an extreme flood that reached 392 m3/sec (210.75%) greater than the average of the maximum flows). We concluded that plant succession in the Azul River follows a “Red Queen” effect whereby the exotic willow and native trees repeatedly reorganized the system after pulses and periods of extreme flooding events. Fil: Datri, Leonardo. Universidad Nacional del Comahue; Argentina. Fil: Datri, Leonardo. Universidad de Flores; Argentina. Fil: Faggi, Ana. Universidad de Flores; Argentina. Fil: Faggi, Ana. Consejo Nacional de Investigaciones Científicas y Tecnológicas; Argentina. Fil: Gallo, Leonardo Ariel. Instituto Nacional de Tecnología Agropecuaria; Argentina. info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/acceptedVersion info:eu-repo/semantics/openAccess other application/pdf
institution Universidad de Flores
institution_str I-89
repository_str R-270
collection Repositorio institucional de la Universidad de Flores
language Inglés
topic SAUCES
HIDROLOGIA
spellingShingle SAUCES
HIDROLOGIA
Datri, Leonardo
Faggi, Ana
Gallo, Leonardo Ariel
Crack willow changing riverine landscapes in Patagonia
topic_facet SAUCES
HIDROLOGIA
description In Patagonia (Argentina) in recent decades, the exotic species and hybrids of Salix alba - Salix fragilis complex has spread over wide areas along watercourses, taking advantage of it is sexually and vegetatively propagation. It out-competes with native vegetation, facilitated by stochastic events related to large floods of long-lasting duration higher than the average maximum of 186 m3/sec for more than a day. We analysed the exotic willow’s increase along the braiding Azul River, and the hydrological regime between 1966 and 2012. We evaluated the links between regime and tree density over time using dendrochronological data. Results showed an increase of the forest’s cover from 2.1% to 70.8% over the last 46 years. The densities of exotic willows grew exponentially between 1966 and 1973, during a period which was free of higher floods. The initial native populations declined as willow’s population increased. Up to 1973 there was an increase in the native populations too. Then from 1974 on, the willow showed a gradual growth coupled with a decline in the native trees. Up 1977 the willow expansion could be linked to an extreme flood that reached 392 m3/sec (210.75%) greater than the average of the maximum flows). We concluded that plant succession in the Azul River follows a “Red Queen” effect whereby the exotic willow and native trees repeatedly reorganized the system after pulses and periods of extreme flooding events.
format Artículo
Artículo
acceptedVersion
author Datri, Leonardo
Faggi, Ana
Gallo, Leonardo Ariel
author_facet Datri, Leonardo
Faggi, Ana
Gallo, Leonardo Ariel
author_sort Datri, Leonardo
title Crack willow changing riverine landscapes in Patagonia
title_short Crack willow changing riverine landscapes in Patagonia
title_full Crack willow changing riverine landscapes in Patagonia
title_fullStr Crack willow changing riverine landscapes in Patagonia
title_full_unstemmed Crack willow changing riverine landscapes in Patagonia
title_sort crack willow changing riverine landscapes in patagonia
publisher Wiley
publishDate 2017
url https://hdl.handle.net/20.500.14340/1145
work_keys_str_mv AT datrileonardo crackwillowchangingriverinelandscapesinpatagonia
AT faggiana crackwillowchangingriverinelandscapesinpatagonia
AT galloleonardoariel crackwillowchangingriverinelandscapesinpatagonia
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