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Please use this identifier to cite or link to this item:
http://hdl.handle.net/10174/19567
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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, J. P. Neves, Nuno Pinto-Correia, Teresa |
Issue Date: | 2016 |
Citation: | Godinho, Sérgio; Guiomar, Nuno; Machado, Rui; Santos, Pedro; Sá-Sousa, Paulo; Fernandes, J. P.; Neves, Nuno; Pinto-Correia, Teresa. Assessment of environment, land management, and spatial variables on recent changes in montado land cover in southern Portugal, Agroforestry Systems, 90, 1, 177-192, 2016. |
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. |
URI: | http://hdl.handle.net/10174/19567 |
Other Identifiers: | 0167-4366 |
Type: | article |
Appears in Collections: | MED - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica
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