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dc.contributor.author
Zimmermann, Heike
dc.contributor.author
Renison, Daniel
dc.contributor.author
Leyer, Ilona
dc.contributor.author
Hensen, Isabell
dc.date.available
2018-07-26T19:27:52Z
dc.date.issued
2009-09
dc.identifier.citation
Zimmermann, Heike; Renison, Daniel; Leyer, Ilona; Hensen, Isabell; Do we need livestock grazing to promote Polylepis australis tree recruitment in the Central Argentinean Mountains?; Springer Tokyo; Ecological Research; 24; 5; 9-2009; 1075-1081
dc.identifier.issn
0912-3814
dc.identifier.uri
http://hdl.handle.net/11336/53219
dc.description.abstract
South American Polylepis mountain forests are endangered due to centuries of logging, fire clearance, and intensive livestock grazing. Polylepis australis (Rosaceae) dominates the tree canopy in the Central Argentinean Mountains, where livestock have been excluded or reduced to very low densities over wide areas. Lowered plant and bird diversity in these abandoned grazing areas suggest that some livestock grazing may be beneficial for conservation purposes. Our study aimed to determine whether this may also be true for forest regeneration. In 300 plots of 1 m2 distributed in sub-regions of high to moderate grazing pressure as well as grazing exclusion, we recorded the presence of P. australis seedlings and grazing indicators. Topographical parameters as well as vegetation and soil characteristics were also assessed. Seedling frequencies were highest in the region with moderate grazing, intermediate with grazing exclusion, and the lowest with high grazing pressures. Logistic regression models revealed that seedling occurrence was highest close to seeder trees, with intermediate litter coverage and at intermediate altitudes above sea level. Since grazing ultimately affects seeder tree occurrence through browsing and reduces litter cover and predominates in higher areas, we conclude that grazing is an important driving factor for P. australis regeneration. We confirm previous studies determining high grazing pressure to be detrimental for P. australis regeneration, but also provide data suggesting that its complete exclusion may not be recommendable either. Management should aim to alternate between a moderate grazing intensity to promote seedling recruitment, with subsequent exclusion to accelerate the growth of the established seedlings.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer Tokyo
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
High-Altitude Forests
dc.subject
Livestock
dc.subject
Logistic Regression
dc.subject
South America
dc.subject
Tree Regeneration
dc.subject.classification
Ecología
dc.subject.classification
Ciencias Biológicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Do we need livestock grazing to promote Polylepis australis tree recruitment in the Central Argentinean Mountains?
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-07-23T17:29:29Z
dc.identifier.eissn
1440-1703
dc.journal.volume
24
dc.journal.number
5
dc.journal.pagination
1075-1081
dc.journal.pais
Japón
dc.journal.ciudad
Tokyo
dc.description.fil
Fil: Zimmermann, Heike. Martin-Luther Universität; Alemania
dc.description.fil
Fil: Renison, Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones Biológicas y Tecnológicas. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina
dc.description.fil
Fil: Leyer, Ilona. Philipps-Universität Marburg; Alemania
dc.description.fil
Fil: Hensen, Isabell. Martin-Luther Universität; Alemania
dc.journal.title
Ecological Research
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007%2Fs11284-009-0585-6
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s11284-009-0585-6
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