INVESTIGADORES
PARDIÑAS ulises francisco J.
artículos
Título:
Micromamíferos (Didelphimorphia y Rodentia) del sudoeste de la provincia de Buenos Aires (Argentina): taxonomía y distribución
Autor/es:
PARDIÑAS, U.F.J.; ABBA, A.; MERINO, M.
Revista:
MASTOZOOLOGÃA NEOTROPICAL
Editorial:
SAREM
Referencias:
Lugar: Mendoza; Año: 2004 vol. 11 p. 211 - 232
ISSN:
0327-9383
Resumen:
ABSTRACT: Small mammals (Didelphimorphia and Rodentia) from southwestern Buenos
Aires province, Argentina: Taxonomy and distribution. Species of small mammals from
southwestern Buenos Aires province range within a wide variety of habitats, herbaceous
(Pampean District), shrubs (Monte District), steppes, and xerophytic woodlands (Espinal
District). Their natural history is still poorly known. In this paper we make a synthesis of the
taxonomy and distribution of the marsupials (Marmosinae) and rodents (Sigmodontinae) of
southwestern Buenos Aires province. Distributional records and taxonomical information were
obtained from field survey, analyses of raptor pellets, revision of specimens housed in
collections in Argentina, and literature. Between Sierra de la Ventana (38º S) and the río
Negro (41ºS) occur two species of marmosines and 14 of sigmodontine rodents. Some of
these species show a restricted distribution (e.g., Phyllotis xanthopygus, endemic for Sierra
de la Ventana), and others are widespread (e.g. Akodon azarae or Calomys musculinus)
across different phytogeographic units. A cluster analysis at local scale shows an ordination
of small mammal assemblages with the topology (Sierra de la Ventana + Southern Atlantic
Coast) (Espinal + Monte). The zoogeographic unicity of the Monte in the study area is
evidenced by two sigmodontines, Akodon iniscatus and Oligoryzomys longicaudatus. The
micromammal assemblage of Sierra de la Ventana may be characterized as pampasic. The
wide distribution of A. azarae and C. musculinus may reflect the anthropic activities developed
during the last century. These activities on shrub steppe have certainly diluted the
original zoogeographic boundaries and allowed the dispersion of opportunistic sigmodontine
species.Species of small mammals from
southwestern Buenos Aires province range within a wide variety of habitats, herbaceous
(Pampean District), shrubs (Monte District), steppes, and xerophytic woodlands (Espinal
District). Their natural history is still poorly known. In this paper we make a synthesis of the
taxonomy and distribution of the marsupials (Marmosinae) and rodents (Sigmodontinae) of
southwestern Buenos Aires province. Distributional records and taxonomical information were
obtained from field survey, analyses of raptor pellets, revision of specimens housed in
collections in Argentina, and literature. Between Sierra de la Ventana (38º S) and the río
Negro (41ºS) occur two species of marmosines and 14 of sigmodontine rodents. Some of
these species show a restricted distribution (e.g., Phyllotis xanthopygus, endemic for Sierra
de la Ventana), and others are widespread (e.g. Akodon azarae or Calomys musculinus)
across different phytogeographic units. A cluster analysis at local scale shows an ordination
of small mammal assemblages with the topology (Sierra de la Ventana + Southern Atlantic
Coast) (Espinal + Monte). The zoogeographic unicity of the Monte in the study area is
evidenced by two sigmodontines, Akodon iniscatus and Oligoryzomys longicaudatus. The
micromammal assemblage of Sierra de la Ventana may be characterized as pampasic. The
wide distribution of A. azarae and C. musculinus may reflect the anthropic activities developed
during the last century. These activities on shrub steppe have certainly diluted the
original zoogeographic boundaries and allowed the dispersion of opportunistic sigmodontine
species.Phyllotis xanthopygus, endemic for Sierra
de la Ventana), and others are widespread (e.g. Akodon azarae or Calomys musculinus)
across different phytogeographic units. A cluster analysis at local scale shows an ordination
of small mammal assemblages with the topology (Sierra de la Ventana + Southern Atlantic
Coast) (Espinal + Monte). The zoogeographic unicity of the Monte in the study area is
evidenced by two sigmodontines, Akodon iniscatus and Oligoryzomys longicaudatus. The
micromammal assemblage of Sierra de la Ventana may be characterized as pampasic. The
wide distribution of A. azarae and C. musculinus may reflect the anthropic activities developed
during the last century. These activities on shrub steppe have certainly diluted the
original zoogeographic boundaries and allowed the dispersion of opportunistic sigmodontine
species.Akodon azarae or Calomys musculinus)
across different phytogeographic units. A cluster analysis at local scale shows an ordination
of small mammal assemblages with the topology (Sierra de la Ventana + Southern Atlantic
Coast) (Espinal + Monte). The zoogeographic unicity of the Monte in the study area is
evidenced by two sigmodontines, Akodon iniscatus and Oligoryzomys longicaudatus. The
micromammal assemblage of Sierra de la Ventana may be characterized as pampasic. The
wide distribution of A. azarae and C. musculinus may reflect the anthropic activities developed
during the last century. These activities on shrub steppe have certainly diluted the
original zoogeographic boundaries and allowed the dispersion of opportunistic sigmodontine
species.Akodon iniscatus and Oligoryzomys longicaudatus. The
micromammal assemblage of Sierra de la Ventana may be characterized as pampasic. The
wide distribution of A. azarae and C. musculinus may reflect the anthropic activities developed
during the last century. These activities on shrub steppe have certainly diluted the
original zoogeographic boundaries and allowed the dispersion of opportunistic sigmodontine
species.A. azarae and C. musculinus may reflect the anthropic activities developed
during the last century. These activities on shrub steppe have certainly diluted the
original zoogeographic boundaries and allowed the dispersion of opportunistic sigmodontine
species.