Please use this identifier to cite or link to this item: http://hdl.handle.net/10174/11814

Title: Assessment of environment, land management, and spatial variables on recent changes in Montado land cover in southern Portugal
Authors: Godinho, Sérgio
Guiomar, Nuno
Machado, Rui
Santos, Pedro
Sá-Sousa, Paulo
Fernandes, João Paulo
Neves, Nuno
Pinto-Correia, Teresa
Keywords: Landscape change
Livestock grazing intensity
Montado/dehesa
Mediterranean
Quercus spp
Spatial distribution
Issue Date: 5-Nov-2014
Publisher: Agroforest Syst
Citation: Godinho, S., Guiomar, N., Machado R., Santos, P., Sá-Sousa, P., Fernandes J.P., Neves, N., Pinto-Correia T. (2014). Assessment of environment, land management, and spatial variables on recent changes in Montado land cover in southern Portugal. Agroforest Syst DOI 10.1007/s10457-014-9757-7
Abstract: Montado decline has been reported since the end of the nineteenth century in southern Portugal and increased markedly during the 1980s. Consensual reports in the literature suggest that this decline is due to a number of factors, such as environmental constraints, forest diseases, inappropriate management, and socioeconomic issues. An assessment on the pattern of montado distribution was conducted to reveal how the extent of land management, environmental variables, and spatial factors contributed to montado area loss in southern Portugal from 1990 to 2006. A total of 14 independent variables, presumably related to montado loss, were grouped into three sets: environmental variables, land management variables, and spatial variables. From 1990 to 2006, approximately 90,054 ha disappeared in the montado area with an estimated annual regression rate of 0.14 % year-1. Variation partitioning showed that the land management model accounted for the highest percentage of explained variance (51.8 %), followed by spatial factors (44.6 %) and environmental factors (35.5 %). These results indicate that most variance in the large-scale distribution of recent montado loss is due to land management, either alone or in combination with environmental and spatial factors. The full GAM model showed that different livestock grazing is one of the most important variables affecting montado loss. This suggests that optimum carrying capacity should decrease to 0.18–0.60 LU ha-1 for livestock grazing in montado under current ecological conditions in southern Portugal. This study also showed that land abandonment, wildfire, and agricultural practices (to promote pastures, crops or fallow lands) were three significant variables influencing montado loss.
URI: http://hdl.handle.net/10174/11814
Type: article
Appears in Collections:PAO - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica
ICAAM - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica

Files in This Item:

File Description SizeFormat
Assessment of environment.pdf293.35 kBAdobe PDFView/Open
FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpaceOrkut
Formato BibTex mendeley Endnote Logotipo do DeGóis 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Dspace Dspace
DSpace Software, version 1.6.2 Copyright © 2002-2008 MIT and Hewlett-Packard - Feedback
UEvora B-On Curriculum DeGois