(Article of periodic en Anglais - 2009)

Document title

Effects of the Alqueva Dam Reservoir on the distribution of steppe birds

Authors(s) and Affiliation(s)

(1) Centre of Ecology and Environment, Univ., Évora, PORTUGAL


The effects of the Alqueva Dam reservoir on the distribution of steppe birds (before and after flooding) was quantified using point-pattern analysis. Sampling points from the dam biological monitoring program, which included data from winter and breeding seasons, were used. To quantitatively assess spatial patterns, the point-pattern was tested using a sequence of statistical methods. The results indicate a decline in the absolute abundance of steppe birds in both seasons, but it is more evident in the breeding season. The results also show an increase in the mean distance between the point surveys, some evidence of a global trend toward the northeast, a decrease of patch values, and a disaggregation of continuous patches


Article of periodic

published at : Physical geography / ISSN 0272-3646

Editor : Taylor & Francis, Abingdon - ROYAUME-UNI (1980)

Millesime : 2009, vol. 30, no1 [pp. 43-63-]

Bibliographic references : 3 p.

Collation : 9 fig., 5 tabl.



INIST-CNRS, Cote INIST : 20106

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.247/0272-3646.30.1.43

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2009
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