Tree and grazing influence on herbaceous pasture diversity in the Dehesa agroforestry system

Lopez Sanchez, Aida and San Miguel Ayanz, Alfonso and Roig Gómez, Sonia and López Carrasco, Celia (2013). Tree and grazing influence on herbaceous pasture diversity in the Dehesa agroforestry system. In: "The Role of Grasslands in a Green Future. Threats and perspectives in less favoured areas. 17th EGF Symposium", 23/06/2013 - 26/06/2013, Akureyri, Islandia. ISBN 978-9979-881-20-9. pp. 391-393.

Description

Title: Tree and grazing influence on herbaceous pasture diversity in the Dehesa agroforestry system
Author/s:
  • Lopez Sanchez, Aida
  • San Miguel Ayanz, Alfonso
  • Roig Gómez, Sonia
  • López Carrasco, Celia
Item Type: Presentation at Congress or Conference (Article)
Event Title: The Role of Grasslands in a Green Future. Threats and perspectives in less favoured areas. 17th EGF Symposium
Event Dates: 23/06/2013 - 26/06/2013
Event Location: Akureyri, Islandia
Title of Book: The Role of G rasslands in a Green Future 391
Date: 2013
ISBN: 978-9979-881-20-9
Subjects:
Faculty: E.T.S.I. Montes (UPM)
Department: Silvopascicultura [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Mediterranean Dehesas are one of the European natural habitat types of Community interest (43/92/EEC Directive), associated to high diversity levels and producer of important goods and services. In this work, tree contribution and grazing influence over pasture alpha diversity in a Dehesa in Central Spain was studied. We analyzed Richness and Shannon-Wiener (SW) indexes on herbaceous layer under 16 holms oak trees (64 sampling units distributed in two directions and in two distances to the trunk) distributed in four different grazing management zones (depending on species and stocking rate). Floristic composition by species or morphospecies and species abundance were analyzed for each sample unit. Linear mixed models (LMM) and generalized linear mixed models (GLMMs) were used to study relationships between alpha diversity measures and independent factors. Edge crown influence showed the highest values of Richness and SW index. No significant differences were found between orientations under tree crown influence. Grazing management had a significant effect over Richness and SW measures, specially the grazing species (cattle or sheep). We preliminary quantify and analyze the interaction of tree stratum and grazing management over herbaceous diversity in a year of extreme climatic conditions.

More information

Item ID: 30180
DC Identifier: http://oa.upm.es/30180/
OAI Identifier: oai:oa.upm.es:30180
Official URL: http://www.ffe.slu.se/Webdata/$agenda/20130628-125327.pdf
Deposited by: Memoria Investigacion
Deposited on: 20 Jun 2014 14:47
Last Modified: 25 May 2015 15:13
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