出版社：Instituto de Pesquisas Ambientais em Bacias Hidrográficas
摘要：The goal of this study was to evaluate the effect of urban activities on the structure and
composition of a bird community in riparian forests in the state of São Paulo, Brazil.The study
was carried out in seven areas of remnant riparian forest where fixed points have been
established to sample bird species.Richness, diversity, abundance, frequency and trophic
groups were used as metrics of the bird community.At each point measurements were taken
for: (1) habitat characteristics: average height of trees, number of trees above 2m, number of
shrubs <2m and the percentage of canopy opening; (2) neighborhood characteristics: closest
distance from open areas, highways, urban areas, river and floodplain to the point of
observation.The observations resulted in 88 species of birds belonging to 34 families.The most
representative families were Tyrannidae, Thraupidae and Picidae.The most predominant
trophic groups were insectivorous (54%), omnivorous (11.5%) and frugivorous (10.3%).The
results obtained showed that the number of trees explained the variation in abundance, while
the mean height of the trees explained variations in richness and frequency.Overall, the bird
community was negatively affected by proximity of urban areas and highways.In conclusion,
the community of birds in the riparian forest may be affected by the loss of trees above 2m and
by urbanization, leading mainly to the replacement of species belonging to specialist trophic
groups by generalist species and those more adjusted to human presence.
关键词：bird community; habitat; landscape; Paraiba do Sul River; urban activities.
