The Effect Of Human Disturbance On Site Habitat
Diversity And Avifauna Community Composition
In Suburban Conservation Areas
Author(s)
P. F. Mooney
Abstract
This study evaluated the causes and effects of habitat heterogeneity in suburban
conservation areas of the metropolitan Vancouver area. Site disturbance, soil
conditions and plant associations were evaluated for their relationship to habitat
heterogeneity. Habitat heterogeneity was correlated with breeding bird
populations and the type of birds found.
Three, urban conservation sites were surveyed for site conditions and avian
populations. Data were spatially referenced in a geographic information system
(GIS) and a habitat diversity index rating was calculated for each site. Site
habitat diversity ratings were compared with the avian species richness and the
birds recorded were classified as urban exploiters, adapters or avoiders.
It was found that human disturbance and biotic succession had produced a
mosaic of seral stage plant communities that increased habitat heterogeneity.
Site-level habitat heterogeneity was correlated with avian species richness. All
categories of urban and non-urban birds were recorded.
Suburban conservation areas can support high avian species richness,
including urban avoiders. Site-level habitat heterogeneity and avian species
richness are strongly correlated. These findings can assist in selecting and
managing urban conservation sites to maintain regional biodiversity.
Keywords: urban biodiversity, site-level habitat diversity, habitat diversity
index, urban exploiters, urban adapters, urban avoiders, conservation.
Keywords
urban biodiversity, site-level habitat diversity, habitat diversity index, urban exploiters, urban adapters, urban avoiders, conservation
Related Book
Other papers in this volume
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