Pacific Island Network Landbird Monitoring Dataset

Four Pacific Island Network parks were surveyed for landbirds and landbird habitat in order to provide information for monitoring long-term trends in forest bird distribution, density, and abundance. Hawaii Volcanoes National Park (HAVO) was surveyed in 2010, 2015/2016 and 2019/2020. Surveys were conducted in the National Park of American Samoa (NPSA) in 2011 and 2018, in Haleakala National Park (HALE) in 2012, 2017, and 2022, and in 2021, surveys began at Kalaupapa National Historical Park (KALA). The entire survey areas were surveyed using point-transect distance sampling to calculate estimates of bird abundance and densities. Canopy cover and composition was collected at the same survey area. In addition to the permanent survey transects from past landbird surveys in the survey areas, randomly generated point-transects were also surveyed, providing a split panel sampling design. This dataset contains the results of the landbird point count and habitat surveys for HAVO, NPSA, HALE, and KALA.

为获取森林鸟类分布、种群密度及丰富度的长期监测趋势数据，本研究对太平洋岛屿网络下属的4座公园开展了陆禽及其栖息生境的调查。夏威夷火山国家公园（Hawaii Volcanoes National Park，缩写HAVO）分别于2010年、2015/2016年及2019/2020年完成调查；美属萨摩亚国家公园（National Park of American Samoa，缩写NPSA）于2011年和2018年开展调查；哈莱阿卡拉国家公园（Haleakala National Park，缩写HALE）分别在2012年、2017年及2022年完成调查；卡拉乌帕帕国家历史公园（Kalaupapa National Historical Park，缩写KALA）则于2021年启动调查工作。本次调查全程采用点样线距离抽样法（point-transect distance sampling）对调查区域进行全覆盖采样，以估算鸟类的丰富度与种群密度。同时在相同调查区域内采集林冠覆盖度及群落组成数据。除沿用过往陆禽调查中设置的永久样线外，本次调查还新增了随机生成的点样线，采用拆分面板抽样设计（split panel sampling design）开展采样。本数据集包含上述四座公园（HAVO、NPSA、HALE及KALA）的陆禽点计数与栖息生境调查结果。