Study

Evidence of positive indirect effects within a community of cavity-nesting vertebrates

  • Published source details Kappes J.J. & Davis J.M. (2008) Evidence of positive indirect effects within a community of cavity-nesting vertebrates. The Condor, 110, 441-449.

Actions

This study is summarised as evidence for the following.

Action Category

Reduce inter-specific competition for nest sites of woodpeckers by removing competitor species

Action Link
Bird Conservation
  1. Reduce inter-specific competition for nest sites of woodpeckers by removing competitor species

    A randomised, replicated and controlled before-and-after study in 2001-2 in 16 sites in longleaf pine Pinus palustris forests in northern Florida, USA (Kappes & Davis 2008) found that culling 168 southern flying squirrels Glaucomys volans from potential red-cockaded woodpecker Picoides borealis breeding cavities over a 12 month period significantly reduced the number of cavities occupied by squirrels (squirrels occupied 0.46 cavities/territory, red-cockaded woodpeckers occupied approximately 2 cavities/territory), compared to control territories but that there was no corresponding increase in cavity occupancy by red-cockaded woodpeckers (squirrels occupied 0.96 cavities/territory, red-cockaded woodpeckers occupied approximately 2 cavities/territory). Instead, there was an increase in occupancy by red-bellied woodpeckers Melanerpes carolinus, another cavity kleptoparasite (1 cavity/territory occupied vs. 0.69 cavities/territory for experimental and control sites respectively). This increase was most noticeable between July-December (a 103% increase compared to controls), when most fledgling red-cockaded woodpeckers acquire cavities.

     

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