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Ecology and Behavior of Chickadees and Titmicean integrated approach$
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Ken A. Otter

Print publication date: 2007

Print ISBN-13: 9780198569992

Published to Oxford Scholarship Online: September 2007

DOI: 10.1093/acprof:oso/9780198569992.001.0001

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Life in the small-bodied cavity-nester guild: Demography of sympatric mountain and black-capped chickadees within nest web communities under changing habitat conditions

Life in the small-bodied cavity-nester guild: Demography of sympatric mountain and black-capped chickadees within nest web communities under changing habitat conditions

Chapter:
(p.111) CHAPTER 8 Life in the small-bodied cavity-nester guild: Demography of sympatric mountain and black-capped chickadees within nest web communities under changing habitat conditions
Source:
Ecology and Behavior of Chickadees and Titmice
Author(s):

Kathy Martin

Andrea R. Norris

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780198569992.003.0009

This chapter discusses the role and ecology of two chickadee species as members of the small-bodied cavity-nester guild and their general relationships in the nest web community. The ecological and environmental factors that might explain demographic changes are examined by asking the general question concerning how changes in community dynamics and habitat characteristics influence population density and nest-site selection of the Parids. Within the nest web community, positive interspecific interactions may result from diverse species assemblages, where cavity excavators may enhance or facilitate the breeding conditions for secondary cavity-nesters. In interior British Columbia, population densities of chickadees and other small cavity-nesters (competitors, facilitators) and predators varies annually across a range of habitat stands, but most have shown substantial increases in breeding density over the past decade. Since these population increases were correlated with changes in habitat condition, the chapter addresses how habitat use and nest-site selection change with density. This problem is approached at the level of the individual (nest-site selection) and at the stand level (chickadee population growth rates) in relation to nesting densities of other members in the cavity-nester community and changing habitat characteristics.

Keywords:   chickadees, sympatric species, nest webs, parids, cavity nesting, excavations, population growth, habitat changes

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