INVESTIGADORES
LAJMANOVICH Rafael Carlos
artículos
Título:
Anuran diversity across agricultural pond in Argentina.
Autor/es:
PELTZER, P. M; LAJMANOVICH, R. C; ATTADEMO, M. A; BELTZER, A. H
Revista:
BIODIVERSITY AND CONSERVATION
Editorial:
Springer
Referencias:
Lugar: New York; Año: 2006 vol. 15 p. 3499 - 3513
ISSN:
0960-3115
Resumen:
We examined the anuran diversity of 31 ponds (30 located on the border of soybean
cropland and one within a protected forest) in mid-western Entre Rý´ os Province (Argentina).
Moreover, each species found was characterised with respect to its vertical location. Using principal
component (PCA) and canonical correspondence analyses (CCA) we quantified associations between
species diversity and habitat and spatial variables. A total of 21 anuran species belonging to
four families (Microhylidae, Bufonidae, Leptodactylidae and Hylidae) were detected in ponds
surrounded by soybean croplands. PCA generated three principal components, which together
explained variation in anuran diversity across the agricultural ponds and control site. Negative
values of PC-1 described the smaller ponds with narrower hedgerow and monospecific shore
vegetation. PC-2 had high loading on pond depth, and PC-3 had negative loading on air temperature.
CCA showed a very strong association between the two data sets. We found all guilds
related with pond area. Indeed, we found that arboreal species were recorded in large ponds with
higher values of shore vegetation index and presence of wider hedgerow. Moreover, a higher
number of terrestrial species was found to relate to large pond areas and greater shore vegetation
diversity. Finally, aquatic species were related to pond area, shore vegetation index and depth.
Anuran diversity across agricultural ponds of mid-western Entre Rý´ os Province can be affected by
local habitat factors such as reduction in pond size and depth, shore vegetation richness, width of
hedgerow and air temperatures. Management of anurans to reverse recent declines will require
defining high-quality habitat for individual species or group of species, followed by efforts to retain
or restore these aquatic habitat. The maintenance of shore vegetation of ponds and hedgerows may
increases the number of species and diversity of anurans within agricultural landscapes.