| independent effects of fragmentation on forest songbirds: an organism-based approach. | the degree to which spatial patterns influence the dynamics and distribution of populations is a central question in ecology. this question is even more pressing in the context of rapid habitat loss and fragmentation, which threaten global biodiversity. however, the relative influence of habitat loss and landscape fragmentation, the spatial patterning of remaining habitat, remains unclear. if landscape pattern affects population size, managers may be able to design landscapes that mitigate habit ... | 2006 | 16827004 |
| negative effects of habitat loss on survival of migrant warblers in a forest mosaic. | habitat loss and fragmentation in forested landscapes often negatively affect animal abundance; however, whether these factors also affect fitness is not well known. we hypothesized that observed decreases in bird occurrence and abundance in landscapes with harvested forests are associated with reduced apparent survival of adults. we defined apparent survival as an estimate of survival that accounts for an imperfect resighting probability, but not permanent emigration (i.e., dispersal). we exami ... | 2011 | 21732980 |
| cross-scale effects of spruce budworm outbreaks on boreal warblers in eastern canada. | insect outbreaks are major natural disturbance events that affect communities of forest birds, either directly by affecting the food supply or indirectly by changing the vegetation composition of forest canopies. an examination of correlations between measures of bird and insect abundance across different spatial scales and over varying time lag effects may provide insight into underlying mechanisms. we developed a hierarchical bayesian model to assess correlations between counts of eight warble ... | 2018 | 30151153 |