Efeitos bióticos e abióticos de ambientes alagáveis nas assembléias de aves aquáticas e piscívoras no Pantanal, Brasil

Abstract

Waterfowl and fish-eating assemblies were studied for four years in Pantanal . Population censuses were conducted in line transects in 1999 and 2000 along the Transpantaneira Park Road in Poconé -MT , and 2002 and 2003 census birds were performed in 20 therealong lakes highway. They determined the species composition and abundance variation of the throughout the year and in subsequent years. It was found the role of abiotic factors ( rainfall , air temperature , heat stroke , size and depth of the lake, temperature , transparency and water pH ) and biotic ( cover and species richness aquatic weeds , and biomass and richness of fish species ) to predict the variation wealth and abundance and species composition of aquatic birds and piscivorous the Pantanal.