![]() ![]() spp.) et les populations du pic glandivore ( Melanerpes formicivorus (Swainson, 1827)) sur 230 ha de chênaie et de savane de la côte centrale californienne en 1979 et en 2013 dans le but d’évaluer les changements démographiques sur une période de temps appropriée pour des chênes matures. Nous avons étudié les communautés de chênes ( Quercus L. Les communautés forestières changent en réponse aux fluctuations climatiques, aux changements dans l’utilisation du territoire et aux introductions d’espèces, de même qu’aux interactions entre espèces établies. Our findings suggest that forests in this area are becoming denser and savanna is becoming more open, which so far has supported an increase in the Acorn Woodpecker population, despite potential habitat loss if Q. Instead, increased acorn production associated with broad-scale canopy growth likely more than compensated for the loss of Q. The number of Acorn Woodpeckers and woodpecker territories increased over the study period, coincident with the increase in percent canopy cover however, these increases were not related spatially. agrifolia increased, whereas the density of stems and basal area of valley oak ( Quercus lobata Née), a species favored by Acorn Woodpeckers, decreased. Overall, percent canopy cover increased, particularly where coast live oak ( Quercus agrifolia Née) and California black oak ( Quercus kelloggii Newberry) were most abundant. spp.) community and Acorn Woodpecker ( Melanerpes formicivorus (Swainson, 1827)) population within 230 ha of oak forest and savanna in central coastal California in 19 to assess demographic changes over a timescale relevant to mature oaks. ![]() Forest communities change in response to shifting climate, changing land use, and species introductions, as well as the interactions of established species. ![]()
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