INVESTIGADORES
LENCINAS Maria Vanessa
congresos y reuniones científicas
Título:
Indirect estimation of landscape uses by Lama guanicoe and domestic herbivorous through the study of diet composition in South Patagonia
Autor/es:
MARTÍNEZ PASTUR, G; SOLER ESTEBAN, R; LENCINAS, MV; BORRELLI, L
Lugar:
Braganca
Reunión:
Conferencia; IUFRO Landscape Ecology International Conference; 2010
Institución organizadora:
IUFRO
Resumen:
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.