Data from: Timber harvest and tree size near nests explains variation in nest site occupancy but not productivity in northern goshawks (Accipiter gentilis) ...

• Main Authors: Rodriguez, Sabrina A., Kennedy, Patricia L., Parker, Timothy H.
• Format: Dataset
• Language: English
• Published: Dryad 2017
• Subjects: raptor; mature forest; Accipiter gentilis; Northern Goshawk
• Online Access: https://dx.doi.org/10.5061/dryad.70s5t; https://datadryad.org/stash/dataset/doi:10.5061/dryad.70s5t

Conservation concern for the northern goshawk (Accipiter gentilis) reflects evidence that goshawks may abandon nest sites or suffer from reduced nesting success in response to some forms of timber harvest. However, this evidence is mixed and has yet to be reviewed systemically and quantitatively. Therefore, we conducted a meta-analysis to assess the extent to which timber harvest and tree size explain variation in goshawk productivity and site occupancy. Goshawk productivity was not significantly explained by the presence of nearby timber harvest nor by the average size of nearby trees either in North America or in Eurasia or when averaged across all studies. Effect sizes differed dramatically among studies and the average effect size was close to zero (Zr = 0.04). However, timber harvest and tree size together more strongly explained goshawk occupancy of nest sites or territories. Within studies, goshawk nest sites or territories with less timber harvest nearby or relatively larger trees were, in most ... : Data for meta-analysis derived from studies comparing timber harvest or tree size to nest site occupancy or productivity in northern goshawks (Accipiter gentilis)These are data derived from published literature for a meta-analysis assessing the degree to which timber harvest and tree size explain productivity and site occupancy in northern goshawks (Accipiter gentilis) We present these data in two alternative formats. (A) An Excel spreadsheet with multiple tabs. This spread sheet includes many comments linked to individual cells explaining the derivation of individual values. (B) A series of .csv files, each corresponding to a different tab in the Excel file. These are the same data as in the Excel sheet, but without the comments linked to individual cells. The Excel tabs / CSV files are as follows: (1) repro_raw These are the studies that compared productivity (mostly number of fledged young per pair or per nest) to either timber harvest or tree size. We report the individual effects reported in each study ...