Lower Puna, Hawaii Island, bird and habitat surveys of 2003 and 2016

The newly identified rapid ohii death (ROD; Metrosideros polymorpha) originated in the lower Puna district and its distribution has spread across Hawaii Island. As ROD expands it is expected that the loss of the dominant tree species will adversely affect bird populations. This project is a first attempt to describe the relationship between the impacts of ROD on the Hawaiian avifauna, especially the native Hawaii amakihi (Hemignathus virens virens) an omnivore found in a wide range of native and nonnative habitat types. Amakihi was generally rare below about 1,300 m elevation (Scott et al. 1986, Reynolds et al. 2003) but recent surveys found that the species is resident and breeding in native-dominated ohii'a forests below 350 m elevation in the Puna district (Woodworth et al. 2005). These birds exhibit serological evidence of having survived prior malaria infections, and surveys show a marked increase in amakihi numbers since the mid-1990s (Spiegel et al. 2006, Hart et al. 2011). We resurveyed the lower Puna survey stations to determine the initial responses of the Hawaiian avifauna to ROD. Provided here in the data release are two tabular datasets containing the project's bird and habitat data.

新发现的侵染多形铁心木（Metrosideros polymorpha，俗称奥希亚树）的快速奥希亚死亡病（rapid ohii death, ROD）最初起源于下普纳地区，目前其分布范围已扩散至整个夏威夷岛。随着ROD的蔓延，作为当地优势树种的奥希亚树大量消亡，预计将对当地鸟类种群造成不利影响。本项目首次尝试阐明ROD对夏威夷鸟类区系的影响关联，重点聚焦于夏威夷安岛旋蜜雀（Hawaii amakihi，学名Hemignathus virens virens）——这是一种广泛栖息于本土与非本土生境类型的杂食性鸟类。1986年Scott等人与2003年Reynolds等人的研究显示，该物种在海拔约1300米以下区域通常较为罕见；但2005年Woodworth等人的近期调查发现，该物种已在普纳地区海拔350米以下的本土优势奥希亚林中定居并繁殖。这些鸟类呈现出曾感染疟疾后存活的血清学证据，且多项调查（2006年Spiegel等人、2011年Hart等人）结果表明，自1990年代中期以来，安岛旋蜜雀的种群数量出现了显著增长。我们重新对下普纳的原有调查站点进行了回访，以明确夏威夷鸟类区系对ROD的初步响应。本数据集发布内容包含两份表格型数据集，收录了本项目的鸟类调查与生境数据。