NDLI: Differential forage use between large native and domestic herbivores in Southern Patagonian Nothofagus forests

Content Provider	Springer Nature Link
Author	Soler Esteban, Rosina Martínez Pastur, Guillermo Lencinas, María Vanessa Borrelli, Laura
Copyright Year	2011
Abstract	Plant—animal interactions at the landscape level become particularly relevant when land use is diversified. Nothofagus forests in southern Patagonia have been used for timber and cattle grazing purposes during the last century, causing livestock to increase (Bos taurus and Ovis aries) and large native herbivores, such as guanaco (Lama guanicoe), either maintained or decreased their populations. Within this scenario, feeding interactions between guanaco and domestic herbivores were analysed in a mosaic of open habitats and different Nothofagus forest types and management histories, whereby a total of six habitat types were identified through satellite image analysis. A total of 205 floristic surveys were conducted to characterize the plant species composition at the landscape level. Diet composition of herbivores was assessed once each season during a year, using microhistological analysis of feces. Results showed higher plant richness in open lands and lower in closed, unmanaged forests. Overall, 43 plant taxa were detected in herbivore feces, which represent 56% of plant richness detected in the field. Both guanacos and domestic herbivores included mainly grasses in their diet, which were found predominantly in open lands. Tree seedlings and saplings were consumed by all herbivores, as well, except during winter. Differential forage use between guanaco and domestic herbivores in southern Patagonian Nothofagus forests did exist. However, competition for available resources among theses herbivores resulted in an alternation of feeding sites, which varied throughout the year. Management plans in southern Southern Patagonia (livestock, silvopastoral plans and timber harvesting) do not consider the direct or indirect consequences on guanaco populations. The challenge, therefore, is to generate management decisions to avoid either guanacos or domestic herbivores from becoming detrimental to the sustainability of managed forested ecosystems.
Starting Page	397
Ending Page	409
Page Count	13
File Format	PDF
ISSN	01674366
Journal	Agroforestry Systems
Volume Number	85
Issue Number	3
e-ISSN	15729680
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-08-28
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Browsing Fecal micro-histological analysis Forest management Landscape analysis Plant life forms Forestry Agriculture
Content Type	Text
Resource Type	Article
Subject	Forestry Agronomy and Crop Science

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