Assessing foraging strategies of herbivores in Mediterranean oak woodlands: a review of key issues and selected methodologies
2013
Ferraz de Oliveira, Maria Isabel | Lamy, Elsa | Bugalho, Miguel N. | Vaz, Margarida | Pinheiro, Cristina | Cancela d’Abreu, Manuel | Capela e Silva, Fernando | Sales-Baptista, Elvira
Montados are agro-silvo-pastoral ecosystems, typical of the Southwest Iberian Peninsula, of high socio-economic and conservation importance, where grazing is a dominant activity. Montados are characterized by an open tree canopy of Quercus sp. and a diverse undercover of shrubs and grasslands that constitute the plant food resources for grazing animals. Plant food resources of Montados are highly variable, both spatially and seasonally, in quantity and quality. Reliable and easy to use methods to monitor grazing are necessary to allow proper understanding of foraging strategies of grazing animals and to set sustainable grazing management. We describe the main characteristics of the plant food resources available for grazing animals, striking its variability, and revise the potential of using N-alkanes and saliva proteome methods to assess foraging strategies in Montados. In a scenario of dynamic multiple choices, we discuss the use of n-alkane methodology for the simultaneous estimation of diet composition and voluntary intake and saliva proteome as a mean of increasing the knowledge on diet adjustments.
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