INVESTIGADORES
ASCHERO Valeria
congresos y reuniones científicas
Título:
Distribution patterns of arboreal Mordellidae in western Amazonian forests
Autor/es:
VALERIA ASCHERO & TERRY L. ERWIN
Lugar:
Florida, USA
Reunión:
Congreso; ESA Annual Meeting, 2005; 2005
Resumen:
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Over
the last decades, descriptions of tropical forests beetles have made
a large taxonomic contribution in Coleoptera, but the mechanisms and
rules explaining the species distribution and abundance in the
tropics are still poorly understood. Adults
of Mordellidae are phytophagus and feed on pollen so, distribution
patterns of beetles at a fine scale responding to forest composition
should reflect animalplant ecological relations.Data
collected from a canopy arthropod biodiversity study conducted in
Ecuadorian Amazonian forests between January 1994 and July 2002 is
here used for exploring spatial and temporal distribution patterns of
beetles responding to tree species occurrence and microhabitat
characteristics. Point maps of beetle distributions were produced at
a scale of meters using
ArcView and distribution patterns observed was tested against canopy
variables, such as: tree species composition; strata structure;
occurrence of dry leaves, lianas and epiphytes, and light measures.
Mordellidae is very rich in species in the canopy of lowland tropical
forests. Richness seems to be stable between seasons, but there is a
great turn over in composition between seasons. Mayority of species
are restringered in distribution and this could be responding to high
degree of host specialization. Using
GIS techniques helps to set distribution information for beetles at a
very fine scale that can be applied at planning inventories studies
and taking local conservation decisions.