INVESTIGADORES
ZURITA Gustavo Andres
artículos
Título:
Range expansion, density and conservation of the Araucaria Tit-spinetail Leptasthenura setaria (Furnariidae) in Argentina: the role of the araucaria Araucaria angustifolia (Araucariaceae) plantations
Autor/es:
CABANNE, S.C; ZURITA, G.A.; SEIPKE, S.H.; BELLOCQ, M.I.
Revista:
BIRD CONSERVATION INTERNATIONAL
Editorial:
CAMBRIDGE UNIV PRESS
Referencias:
Lugar: Cambridge; Año: 2007 vol. 17 p. 341 - 349
ISSN:
0959-2709
Resumen:
The Araucaria Tit-spinetail Leptasthenura setaria (Furnariidae) is a globally Near Threatened
species. Its habitat, the araucaria (Araucaria angustifolia) rainforest of south-east Brazil and
north-east Argentina, is highly fragmented and reduced to nearly 10% of its original range. The
species has also been recorded in commercial araucaria plantations that comprise about 80% of
its suitable habitat in Argentina. This situation provides an opportunity for the conservation of
the Araucaria Tit-spinetail in a human-modified landscape. We assessed the occurrence of the
species in the region and estimated its density and total population size in araucaria plantations
in Argentina. We discuss the value of plantations in the conservation of the bird, and evaluate its
conservation status in Argentina using IUCN criteria. The density of the tit-spinetail in
araucaria plantations, estimated by a distance sampling method, was 9 birds ha21. The overall
population size in commercial plantations appears to be large (.7,000 birds), showing that
araucaria plantations play an important role in the conservation of the bird. However,
plantations must not replace the native araucaria forest because the former are an intrinsically
fragmented habitat influenced primarily by economic factors and forestry practices. The longterm
conservation and restoration of araucaria rainforest in Argentina and Brazil must be
guaranteed to conserve the Araucaria Tit-spinetail and other species associated with this
rainforest. Based on the restricted and very fragmented habitat, the Araucaria Tit-spinetail
should be regarded as Vulnerable in Argentina.