Invader species of Argentina: A review about beaver (Castor canadensis) population situation on Tierra del Fuego ecosystem

Autores
Lizarralde, Marta Susana; Escobar, Julio Martin; Deferrari, Guillermo Alejandro
Año de publicación
2004
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Beavers (Castor canadensis) were introduced on Isla Grande of Tierra del Fuego, Argentina, in 1946. The suitable feeding and lodging sites coupled with the lack of natural predators or competitors favored rapid population growth and range expansion. This paper shows current population status and landscape modifications induced by beaver in these southern ecosystems. Beaver now occur in all streams in the Andean and extra-Andean areas and nearly all aquatic habitats on Isla Grande as well as other Chilean islands of Tierra del Fuego archipelago (70,000 km2). Low-gradient areas on small streams were more densely occupied than those of the slope valleys. Densities were similar to those in the Northern Hemisphere. Extensively colonized habitats showed 0.7 active beaver colonies per km2. Based on their different beaver occupancy patterns and frequency of colony sites, we developed four land capability classes-A, B, C and D-to use in planning and resource management.  The highest densities were found in classes C and D -4.7 and 5.6 colony sites per km- indicating that both these areas had the greatest potential for beaver production.   Beaver-altered sites had higher levels of organic and inorganic nitrogen suggesting that seasonal hydrological changes could be affecting nitrification and denitrification and also resulting in accumulated organic carbon and phosphorus in the stream channel. Beaver ponds may be considered  sources of essential nutrients (P and N) and carbon. Chromosome analysis showed no differences with the North American karyotype. Genetic structure and variability of the beaver population are analyzed.
Fil: Lizarralde, Marta Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Escobar, Julio Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Deferrari, Guillermo Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Materia
Invader
Beaver
Tierra del Fuego
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:11336/162998

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network_name_str CONICET Digital (CONICET)
spelling Invader species of Argentina: A review about beaver (Castor canadensis) population situation on Tierra del Fuego ecosystemLizarralde, Marta SusanaEscobar, Julio MartinDeferrari, Guillermo AlejandroInvaderBeaverTierra del Fuegohttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Beavers (Castor canadensis) were introduced on Isla Grande of Tierra del Fuego, Argentina, in 1946. The suitable feeding and lodging sites coupled with the lack of natural predators or competitors favored rapid population growth and range expansion. This paper shows current population status and landscape modifications induced by beaver in these southern ecosystems. Beaver now occur in all streams in the Andean and extra-Andean areas and nearly all aquatic habitats on Isla Grande as well as other Chilean islands of Tierra del Fuego archipelago (70,000 km2). Low-gradient areas on small streams were more densely occupied than those of the slope valleys. Densities were similar to those in the Northern Hemisphere. Extensively colonized habitats showed 0.7 active beaver colonies per km2. Based on their different beaver occupancy patterns and frequency of colony sites, we developed four land capability classes-A, B, C and D-to use in planning and resource management.  The highest densities were found in classes C and D -4.7 and 5.6 colony sites per km- indicating that both these areas had the greatest potential for beaver production.   Beaver-altered sites had higher levels of organic and inorganic nitrogen suggesting that seasonal hydrological changes could be affecting nitrification and denitrification and also resulting in accumulated organic carbon and phosphorus in the stream channel. Beaver ponds may be considered  sources of essential nutrients (P and N) and carbon. Chromosome analysis showed no differences with the North American karyotype. Genetic structure and variability of the beaver population are analyzed.Fil: Lizarralde, Marta Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Escobar, Julio Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Deferrari, Guillermo Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaInterciencia2004-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/162998Lizarralde, Marta Susana; Escobar, Julio Martin; Deferrari, Guillermo Alejandro; Invader species of Argentina: A review about beaver (Castor canadensis) population situation on Tierra del Fuego ecosystem; Interciencia; Interciencia; 29; 7; 12-2004; 352-3560378-1844CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.redalyc.org/articulo.oa?id=33909402info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:35:57Zoai:ri.conicet.gov.ar:11336/162998instacron: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:34982025-09-29 09:35:58.06CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Invader species of Argentina: A review about beaver (Castor canadensis) population situation on Tierra del Fuego ecosystem
title Invader species of Argentina: A review about beaver (Castor canadensis) population situation on Tierra del Fuego ecosystem
spellingShingle Invader species of Argentina: A review about beaver (Castor canadensis) population situation on Tierra del Fuego ecosystem
Lizarralde, Marta Susana
Invader
Beaver
Tierra del Fuego
title_short Invader species of Argentina: A review about beaver (Castor canadensis) population situation on Tierra del Fuego ecosystem
title_full Invader species of Argentina: A review about beaver (Castor canadensis) population situation on Tierra del Fuego ecosystem
title_fullStr Invader species of Argentina: A review about beaver (Castor canadensis) population situation on Tierra del Fuego ecosystem
title_full_unstemmed Invader species of Argentina: A review about beaver (Castor canadensis) population situation on Tierra del Fuego ecosystem
title_sort Invader species of Argentina: A review about beaver (Castor canadensis) population situation on Tierra del Fuego ecosystem
dc.creator.none.fl_str_mv Lizarralde, Marta Susana
Escobar, Julio Martin
Deferrari, Guillermo Alejandro
author Lizarralde, Marta Susana
author_facet Lizarralde, Marta Susana
Escobar, Julio Martin
Deferrari, Guillermo Alejandro
author_role author
author2 Escobar, Julio Martin
Deferrari, Guillermo Alejandro
author2_role author
author
dc.subject.none.fl_str_mv Invader
Beaver
Tierra del Fuego
topic Invader
Beaver
Tierra del Fuego
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Beavers (Castor canadensis) were introduced on Isla Grande of Tierra del Fuego, Argentina, in 1946. The suitable feeding and lodging sites coupled with the lack of natural predators or competitors favored rapid population growth and range expansion. This paper shows current population status and landscape modifications induced by beaver in these southern ecosystems. Beaver now occur in all streams in the Andean and extra-Andean areas and nearly all aquatic habitats on Isla Grande as well as other Chilean islands of Tierra del Fuego archipelago (70,000 km2). Low-gradient areas on small streams were more densely occupied than those of the slope valleys. Densities were similar to those in the Northern Hemisphere. Extensively colonized habitats showed 0.7 active beaver colonies per km2. Based on their different beaver occupancy patterns and frequency of colony sites, we developed four land capability classes-A, B, C and D-to use in planning and resource management.  The highest densities were found in classes C and D -4.7 and 5.6 colony sites per km- indicating that both these areas had the greatest potential for beaver production.   Beaver-altered sites had higher levels of organic and inorganic nitrogen suggesting that seasonal hydrological changes could be affecting nitrification and denitrification and also resulting in accumulated organic carbon and phosphorus in the stream channel. Beaver ponds may be considered  sources of essential nutrients (P and N) and carbon. Chromosome analysis showed no differences with the North American karyotype. Genetic structure and variability of the beaver population are analyzed.
Fil: Lizarralde, Marta Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Escobar, Julio Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Deferrari, Guillermo Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
description Beavers (Castor canadensis) were introduced on Isla Grande of Tierra del Fuego, Argentina, in 1946. The suitable feeding and lodging sites coupled with the lack of natural predators or competitors favored rapid population growth and range expansion. This paper shows current population status and landscape modifications induced by beaver in these southern ecosystems. Beaver now occur in all streams in the Andean and extra-Andean areas and nearly all aquatic habitats on Isla Grande as well as other Chilean islands of Tierra del Fuego archipelago (70,000 km2). Low-gradient areas on small streams were more densely occupied than those of the slope valleys. Densities were similar to those in the Northern Hemisphere. Extensively colonized habitats showed 0.7 active beaver colonies per km2. Based on their different beaver occupancy patterns and frequency of colony sites, we developed four land capability classes-A, B, C and D-to use in planning and resource management.  The highest densities were found in classes C and D -4.7 and 5.6 colony sites per km- indicating that both these areas had the greatest potential for beaver production.   Beaver-altered sites had higher levels of organic and inorganic nitrogen suggesting that seasonal hydrological changes could be affecting nitrification and denitrification and also resulting in accumulated organic carbon and phosphorus in the stream channel. Beaver ponds may be considered  sources of essential nutrients (P and N) and carbon. Chromosome analysis showed no differences with the North American karyotype. Genetic structure and variability of the beaver population are analyzed.
publishDate 2004
dc.date.none.fl_str_mv 2004-12
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/11336/162998
Lizarralde, Marta Susana; Escobar, Julio Martin; Deferrari, Guillermo Alejandro; Invader species of Argentina: A review about beaver (Castor canadensis) population situation on Tierra del Fuego ecosystem; Interciencia; Interciencia; 29; 7; 12-2004; 352-356
0378-1844
CONICET Digital
CONICET
url http://hdl.handle.net/11336/162998
identifier_str_mv Lizarralde, Marta Susana; Escobar, Julio Martin; Deferrari, Guillermo Alejandro; Invader species of Argentina: A review about beaver (Castor canadensis) population situation on Tierra del Fuego ecosystem; Interciencia; Interciencia; 29; 7; 12-2004; 352-356
0378-1844
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.redalyc.org/articulo.oa?id=33909402
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
application/pdf
dc.publisher.none.fl_str_mv Interciencia
publisher.none.fl_str_mv Interciencia
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
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