INVESTIGADORES
TABENI Maria Solana
artículos
Título:
Linking small desert mammal distribution to habitat structure in a protected and grazed landscape of the Monte, Argentina
Autor/es:
TABENI, S; MASTRANTONIO, L.; OJEDA, R. A.
Revista:
ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY
Editorial:
Elsevier
Referencias:
Año: 2007 vol. 31 p. 259 - 269
ISSN:
1146-609X
Resumen:
Interpretation of landscape patterns from the perspective of different
species allows knowing the way in which they perceive landscape, and
how their perception varies with scale. We examined distribution of
four small mammal species at different scales over a landscape
including protected and grazed areas, and associated species
distribution with landscape structure. The study was conducted in the
central Monte Desert (Reserve of Ñacuñán). Trap grids were set in both
areas at two scales, varying their grain and extent. To determine
whether spatial patterns are random, clumped or regular, we used a
point pattern analysis. Logistic regressions were performed to relate
the presence-absence of small mammals to environmental variables.
Intensity of the point pattern was not constant, either in the Reserve
or the grazed area. Small mammal abundance exhibited a heterogeneous
distribution, and the existence of a first-order effect was detected
for all species. No second-order effects were detected, the point
pattern was random for all species in both areas. Both areas were
differently perceived by rodent species. Habitat structure in both
conditions and its variations with scale appear to be important factors
affecting distribution patterns.