Please use this identifier to cite or link to this item: http://hdl.handle.net/10790/2608

Productivity of forest birds at Hakalau Forest NWR

File SizeFormat 
PaxtonHakalau110514.pdf1.09 MBAdobe PDFView/Open

Item Summary

Title: Productivity of forest birds at Hakalau Forest NWR
Authors: Cummins, George
Kendall, Steve
Paxton, Eben
Keywords: endangered species, native bird species, honey creepers
Issue Date: 24 Jan 2016
Series/Report no.: TR-056
Abstract: Hawai‘i has some of the most endangered avian species in the world, which face numerous threats from habitat loss, disease, climate change, and introduced species. This report details the results of a two-year productivity study of all forest bird species at Hakalau National Wildlife Refuge, Hawai‘i Island. We found and monitored nests from seven native species and three common non-native species of forest birds at three sites across the refuge. In addition to gathering important baseline information on productivity of forest birds, we examined differences in productivity between years, sites, and as a function of nest height. The weather differed greatly between the two years, with much more rain occurring in 2014. The daily survival rate (DSR) of nests was found to have an inverse relationship with the amount of rainfall, and accordingly was much lower in 2014 compared to 2013. Nest success was lower at a regenerating forest site compared with mature rainforest, indicating negative environmental factors affecting nest success may be exacerbated in reforested areas which have lower canopies. Nest success was also impacted by nest height, with a positive relationship in the drier 2013, and a negative relationship in 2014 for the canopy nesting honeycreepers. The large difference in weather and DSR between years illustrates the need for long term demographic studies that can capture the vital rates of this community of birds.
Pages/Duration: 24
URI/DOI: http://hdl.handle.net/10790/2608
Appears in Collections:Hawaii Cooperative Studies Unit (HCSU)



Items in UH System Repository are protected by copyright, with all rights reserved, unless otherwise indicated.