AVIS-IBIS

Birds of Indian Subcontinent

Influence of forest structure on the density and distribution of the White-backed Woodpecker Dendrocopos leucotos and Black Woodpecker Dryocopus martius in Quinto Real (Spanish western Pyrenees)

Publication Type:Journal Article
Year of Publication:1996
Authors:Fernández, C, Azkona, P
Journal:Bird Study
Volume:43
Date Published:1996
ISBN Number:0006-3657
Keywords:Dendrocopos, Dendrocopos leucotos, Dryocopus, Dryocopus martius, Picidae, Picoides, Picoides leucotos
Abstract:The nesting areas of 13 pairs of Black Woodpecker (0.41 pairs/km2) and 12 pairs of White-backed Woodpecker (0.38 pairs/km2) were mapped in the Quinto Real forest (Spanish western Pyrenees). Nearest-neighbour analysis indicated a uniform spacing of Black Woodpecker territories and, as both species occupied the most developed beechwoods, White-backed and Black territories showed an aggregated distribution. The local distribution appears to be determined by forest structure. Principal components analysis indicated that forest plots occupied by the woodpeckers had a high percentage of beech in old forest (with a total basal area of tree boles above 20 m2/ha) and with many large trees (diameter at breast height, dbh, over 60 cm).The nesting areas of 13 pairs of Black Woodpecker (0.41 pairs/km2) and 12 pairs of White-backed Woodpecker (0.38 pairs/km2) were mapped in the Quinto Real forest (Spanish western Pyrenees). Nearest-neighbour analysis indicated a uniform spacing of Black Woodpecker territories and, as both species occupied the most developed beechwoods, White-backed and Black territories showed an aggregated distribution. The local distribution appears to be determined by forest structure. Principal components analysis indicated that forest plots occupied by the woodpeckers had a high percentage of beech in old forest (with a total basal area of tree boles above 20 m2/ha) and with many large trees (diameter at breast height, dbh, over 60 cm).
URL:http://www.tandfonline.com/doi/abs/10.1080/00063659609461023
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