منابع مشابه
Testing Alternative Hypotheses for the Cause of Population Declines: The Case of the Red-Headed Woodpecker
The Red-headed Woodpecker (Melanerpes erythrocephalus) has experienced strong population declines during the past 3 decades. Using North American Breeding Bird Survey (BBS) and Audubon Christmas Bird Count (CBC) data, we investigated 4 hypotheses that may explain this decline, including: (1) interspecific competition with native Red-bellied Woodpeckers (Melanerpes carolinus) and nonnative Europ...
متن کاملRed-cockaded Woodpecker Centers On
T he southern pine beetle, Dendroctonus fiontalis (Coleoptera: Scolytidae), and the red-cockaded woodpecker, Picoides borealis, are indigenous species that occur together in pine (Pinus sp.) forests of the southern United States. For different reasons, these organisms have been the focus of considerable research. Interest in the southern pine beetle centers on the role this insect plays as a pe...
متن کاملFactors That Influence Translocation Success in the Red-cockaded Woodpecker
To restore a population that had declined to 4 individuals by late 1985, 54 Red-cockaded Woodpeckers (P&ides borealis) were translocated at the Savannah River Site in South Carolina between 1986 and 1995. Translocation success was evaluated by sex, age, and distance between the capture and release site. For moves involving females, the presence of a resident male and the status of the male (bre...
متن کاملFall movements of Red-headed Woodpeckers in South Carolina
Fall migration of Red-headed Woodpeckers (Melanerpes erythrocephalus) can be erratic, with departure rates, directions, and distances varying among populations and individuals. We report fall migration departure dates, rates, and routes, and the size of fall home ranges of 62 radio-tagged Red-headed Woodpeckers in western South Carolina. Rates of fall migration differed among years; all radio-t...
متن کاملCompetition among Bark-foraging Birds in Central Illinois: Experimental Evidence
Most studies on similar coexisting species enumerate ecological differences which presumably reduce the demand for common resources and allow coexistence (MacArthur 1958, Root 1967, Stallcup 1968). As Schoener (1974) pointed out, however, these differences alone do not demonstrate the role of competition in structuring avian communities. Even if niches were arranged randomly with respect to one...
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ژورنال
عنوان ژورنال: Blue Jay
سال: 1983
ISSN: 2562-5667,0006-5099
DOI: 10.29173/bluejay4708