How herbivores optimise diet quality and intake in heterogeneous pastures, and the consequences for vegetation dynamics

R. Baumont; C. Ginane; F. Garcia; P. Carrère

How herbivores optimise diet quality and intake in heterogeneous pastures, and the consequences for vegetation dynamics

于Pastoral systems in marginal environments

著者：

R. Baumont

R. Baumont ¹Institut National de la Recherche Agronomique, Unité de Recherches sur les Herbivores, 63122 Saint-Genès-Champanelle, France, Email: baumont@clermont.inra.fr

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C. Ginane

C. Ginane ¹Institut National de la Recherche Agronomique, Unité de Recherches sur les Herbivores, 63122 Saint-Genès-Champanelle, France, Email: baumont@clermont.inra.fr

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F. Garcia

F. Garcia ¹Institut National de la Recherche Agronomique, Unité de Recherches sur les Herbivores, 63122 Saint-Genès-Champanelle, France, Email: baumont@clermont.inra.fr
^{Institut National de la Recherche Agronomique, Unité d’Agronomie, 63039 Clermont- Ferrand, France}

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P. Carrère

P. Carrère ^{Institut National de la Recherche Agronomique, Unité d’Agronomie, 63039 Clermont- Ferrand, France}

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类型:: 章节

Page Range:: 39–50

DOI:: https://doi.org/10.3920/9789086865574_004

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Understanding the interplay between foraging behaviour and vegetation dynamics in heterogeneous pasture is an essential requirement for evaluating the value of the resource for large herbivores and for managing that resource. The orientation of selective grazing behaviour between intake and diet quality depends on the spatial and temporal scales considered. In the short-term scale of a grazing sequence, there is evidence that large herbivores tend to optimise the intake rate of digestible materials by adaptation of their biting behaviour and by patch choice. On a day-to-day scale, there is evidence that large herbivores tend to prioritise the quality of the diet to minimise digestive constraints within the time that they can spend grazing. On a pasture scale, the search for areas giving the best trade-off between quantity and quality of intake leads to the optimisation of their foraging paths, in particular by modulating their sinuosity in response to heterogeneity. Repeated grazing of preferred patches creates a positive feedback on forage quality and enhances heterogeneity. Long-term consequences on vegetation dynamics, botanic composition and grassland quality are less understood.

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Pastoral systems in marginal environments

ISBN:: 9789086865574

出版社:: Wageningen Academic

印刷出版日期:: 30 Oct 2005

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- Life Sciences

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How herbivores optimise diet quality and intake in heterogeneous pastures, and the consequences for vegetation dynamics

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Pastoral systems in marginal environments

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