An Experimental Test of Interspecific Competition for Red-cockaded Woodpecker Cavities
نویسندگان
چکیده
Ahntrcrct: To test whether the presence of nest boxes near red-cockaded woodpecker (R(Z\V. Picoirlcs horwh) cavity trees red~~ced ca~it\ USC by other species and irnpro\-ed 1ICW reproductive success on the Francis Marion National Forest in coastal South Carohna, WC ~~XYY~ 3 nest boxes in each of 62 experimental clusters and designated 61 clusters as controls. Our observations of nest box and cavib use showed that nest boxes were somewhat effective in reducing cavil; use and that eastern blu&rds (Sidiu sic~lis) and so~ltlwrn filing scp~irrcls (Clnucoqs cduw) were the most frequent wers of nest boxes and ca\itirs. Hhlelkds prrfrrred nest bows to cavities in both years and flyng squirrels showed significant preference for nest boxes ill 1992. Pretreatment monitoring (1990) of RCIf’ rrproducti\ P perforlnilnce showrd no significant differences IWwren control and experimental groups. IIowrver, posttreatment monitoring showed that in 1991 RC\Vs in experinlental cllistcrs were siguificantlv ~norr likelv to nest than HC%Vs in control chlstrrs; in 1991 and 1992, the\ wcw Inore likrh to fledge 21 yo&g. Further; HCWs were less likely to initiate a nest if ~1 c,a\iv was occupbd 1)~ a non-K(Z\Y species than if no cavities in the cluster were occllpied by a non-K(XV species. These results indicate that HCW cavities were subject to interspecific cornpetition and that ilest boxes may be an effective nle;u~s of reducing competition, particularly when the nnurl)er of cavities is limited. J. WILDL. MANAGE. 61(4):1268-1280
منابع مشابه
Competition for Red-cockaded Woodpecker Roost and Nest Cavities: Effects of Resin Age and Entrance Diameter
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