Patterns of tree use by birds pre- and post-koa moth outbreak, Hawaii Island, 2013-2014
Dates
Publication Date
2021-02-17
Start Date
2013-05-22
End Date
2013-08-15
Citation
Banko, P.C., Peck, R.W., and Paxton, E.H., 2021, Hawaii Island bird response to koa moth outbreak, 2013-2014: U.S. Geological Survey data release, https://doi.org/10.5066/P9CKV8QM.
Summary
Observers at Hakalau Forest National Wildlife Refuge recorded the use by birds of koa (Acacia koa) and ohia (Metrosideros polymorpha) trees in two sites that were recovering from ungulate disturbance and two reforestation sites where trees had been planted. Observations were made pre- and post-defoliation of koa trees by koa moths (Scotorythra paludicola) during 2013. Focal trees at each site were selected haphazardly and observed for 2 minutes to determine the total number individual birds that visited the tree. Birds were counted when they were already present or as they flew into a tree during the 2-minute period, regardless of whether they departed before the end of the observation period. Birds were identified to species when [...]
Summary
Observers at Hakalau Forest National Wildlife Refuge recorded the use by birds of koa (Acacia koa) and ohia (Metrosideros polymorpha) trees in two sites that were recovering from ungulate disturbance and two reforestation sites where trees had been planted. Observations were made pre- and post-defoliation of koa trees by koa moths (Scotorythra paludicola) during 2013. Focal trees at each site were selected haphazardly and observed for 2 minutes to determine the total number individual birds that visited the tree. Birds were counted when they were already present or as they flew into a tree during the 2-minute period, regardless of whether they departed before the end of the observation period. Birds were identified to species when possible, but individuals of unidentified species were counted the same as species that were identified. We also categorized the level of flowering on ohia trees because many birds are attracted to the nectar.
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Koa Moth Outbreak, Bird Tree Use Data.xml Original FGDC Metadata
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KoaMothOutbreakBirdTreeUse.csv
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Related External Resources
Type: Related Primary Publication
Banko, P., Peck, R., Yelenik, S., Paxton, E., Bonaccorso, F., Montoya-Aiona, K. and Foote, D., 2016, Dynamics and ecological consequences of the 2013-2014 Koa moth outbreak at Hakalau Forest National Wildlife Refuge
The purpose of data collection was to evaluate whether patterns of tree visitation by certain species or by birds in general changed before and after koa defoliation. The data can be useful in predicting how birds may respond to changes in the availability of trees due to defoliation or stand-level mortality.
