CADIC   02618
CENTRO AUSTRAL DE INVESTIGACIONES CIENTIFICAS
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Indirect estimation of landescape uses by Lama guanicoe and domestic herbivores through the study of diet composition in South Patagonia
Autor/es:
MARTÍNEZ PASTUR, GUILLERMO; SOLER ESTEBAN, ROSINA MATILDE; LENCINAS, MARIA VANESSA; BORRELLI, LAURA
Lugar:
Bragança, Portugal
Reunión:
Conferencia; IUFRO Landscape Ecology International Conference; 2010
Resumen:
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Herbivory is central in
ecosystem function studies, and herbivores influence over regeneration and
vegetation composition through browsing. Understanding diet selection behavior
along the year is important to predict herbivore impacts on regeneration and
vegetation dynamics under different scenarios of forest and grazing management.
The objective was to evaluate diet composition of herbivorous, and correlates it
to the use of different vegetation types along the year. Study was conducted in
100 km² of Tierra del Fuego Island (Argentina) where 205
floristic surveys were obtained. Feces of native (Lama guanicoe) and domestic (Bos
taurus and Ovis aries)
herbivorous were collected. Four laboratory samples per species and season were
analyzed, each one composed by five fecal collection. Samples were mixed, dried
and ground in a mill (1 mm) for micro-histological
analysis. Browsing occurred all around year, where native and domestic
herbivorous alternate the uses of different environments. Native species
preferred Nothofagus pumilio forests,
except in winter, where domestic species had major predominance. Beside this,
all herbivorous species included grasses in their diet, which were found in
open environments (grasslands and peatlands). The knowledge of diet and plant
distribution at landscape level allows us to propose management strategies for
native and domestic herbivorous.