Assessing the impact of local habitat variables and landscape context on riparian birds...

Authors: 
David Luther, Jodi Hilty, Jack Weiss, Caitlin Cornwall, Missy Wipf, Grant Ballard
Publication Date: 
23 January 2008
Publisher: 
Springer Science+Business Media B.V.
Publication Place: 
online
Other Citation Info: 
Biodivers Conserv (2008) 17:1923–1935
Long Title: 
Assessing the impact of local habitat variables and landscape context on riparian birds in agricultural, urbanized, and native landscapes
Abstract: 

regions worldwide. We have limited knowledge about the eVects
of human activities on native species in these landscapes and which, if any, management
practices might enhance the conservation of native biodiversity within them. Through a citizen
volunteer bird-monitoring project, we compared bird abundance and species richness
in northern Californian riparian zones surrounded by vineyards, urban areas, and natural
areas. We assessed both local and landscape-level variables that may enhance native bird
diversity in each land use type. We also demonstrate a new statistical approach, generalized
estimating equations, to analyze highly variable data, such as that collected by volunteers.
Avian abundance was highly correlated with both landscape context and local habitat
variables, while avian richness was correlated with local habitat variables, specifically
shrub richness, and percent of tree cover. In particular, shrub species richness has a strong
positive correlation with riparian-preferring bird species. This suggests that active local
management of riparian zones in human-dominated landscapes can increase our ability to
retain native bird species in these areas.

Keywords: 
Birds, Habitat conservation, Riparian, Landscape context, Shrub richness, Urbanization, Vineyards
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BirdsHabitatStudyDLJHCXC.pdf465.85 KB

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