Pacific Island Ecosystems Research Center

Data and Tools

Filter Total Items: 125
Date published: January 1, 2018

Occurrence of natural nest cavities in montane ohia trees in Hawaii Volcanoes National Park

We quantified the availability of breeding habitat of the endangered Hawaiian Akepa (Loxops coccineus). The species is thought to nest excusively in natural cavities within mature ohia (Metrosideros polymorpha) trees but birds commonly occur in short stature trees that presumably do not have any natural cavities because of their polyploidal (many-branched) structure. To test this hypothesis we...

Date published: January 1, 2018

Laysan Island landcover 18May2010

This dataset contains landcover classes for Laysan Island based on a satellite image taken by DigitalGlobe, Inc. on May 18, 2010. Landcover was classified into 15 different categories, categories determined by how avifauna use these categories for habitat, nesting and foraging.

Date published: January 1, 2018

Monitoring Hawaiian Biodiversity: Pilot study to assess changes to Hawaii Island forest birds and their habitat - 1977 pig dataset

The Hawaii Forest Bird Survey (HFBS) systematically characterized plant and bird communities across transects spanning all major Hawaiian Islands except O‘ahu. This extensive dataset has now been organized into a database and associated geographic information system (GIS) layers. This baseline provides an opportunity to assess how forest ecosystems and their constituent bird and...

Date published: January 1, 2018

Elepaio nest monitoring data in Hawaii Volcanoes National Park from 2015-2017

We evaluated the nesting response of Hawai‘i ‘Elepaio (Chasiempis sandwichensis; Monarchidae), a generalist insectivore, to the removal of black rats using rodenticide in a before-after-control-impact study in high and low, mesic montane habitat recovering from long-term damage from introduced ungulates and weeds. We monitored nesting activity during 2015–2016...

Date published: January 1, 2018

Sampling locations for occurrence of natural nest cavities in montane ohia trees in Hawaii Volcanoes National Park

We quantified the availability of breeding habitat of the endangered Hawaii Akepa (Loxops coccineus). The species is thought to nest excusively in natural cavities within mature ohia (Metrosideros polymorpha) trees but birds commonly occur in short stature trees that presumably do not have any natural cavities because of their polyploidal (many-branched) structure. To test this hypothesis we...

Date published: January 1, 2018

Rat mark-recapture in rodenticide treatment and non-treatment plots, Hawaii Volcanoes National Park, fall 2016 and spring 2017

This is a selected data set used to assess the impacts of rodenticide treatment on black rat (Rattus rattus) abundance within Hawaii Volcanoes National Park (HAVO). The key objective was to identify rat density in native habitat in the Mauna Loa Strip section of HAVO before and after rodenticide treatment, using a paired non-treatment and treatment plot for comparison in a before-after,...

Date published: January 1, 2018

Hawaii Volcanoes National Park Elepaio nest monitoring and black rat mark recapture data 2015-2017

In Hawai‘i and other oceanic islands with few native land mammals, black rats (Rattus rattus) are among the most damaging invasive vertebrate species to native forest bird populations and habitats, due to their arboreal behavior and generalist foraging habitats and habitat use. We evaluated the nesting response of Hawai‘i ‘Elepaio (Chasiempis sandwichensis;...

Date published: January 1, 2018

Hawaiian Islands Hawaiian Hoary Bat Genetic Sexing 2009-2016

We tested the utility of a protocol using genetic markers that previously proved successful to identify the sex of Vespertilionid bats on tissues collected from live bats and carcasses of varying age from the Hawaiian hoary bat (Lasiurus cinereus semotus). This molecular method is based on genes unique to X and Y chromosomes in mammals and previously was used successfully on North American...

Date published: January 1, 2018

Midway Atoll Hatch Year 2012 Black-footed Albatross Nest Locations

Approximately one-third of the global population of black-footed albatrosses (Phoebastria nigripes) nest at Midway Atoll in the Northwestern Hawaiian Islands. As part of an effort to monitor albatross at this globally important site, USFWS personnel and volunteers conduct an annual, spatially-explicit, atoll-wide albatross census during peak nesting when albatrosses are attending an egg (...

Date published: January 1, 2018

Percent cover of plants on south facing slopes of Santa Cruz Island, CA, in 2004 and 2016

This data contains the percent cover of all species found along transect on the south facing slopes of Santa Cruz Island, CA. It was used in the analysis for the Manuspcript "Long-term impacts of exotic grazer removal on native shrub recovery, Santa Cruz Island, California". These sites were sampled in 2004 and 2016 to gain a longer term view on native shrub reestablishment into exotic...

Date published: January 1, 2018

Monitoring Hawaiian Biodiversity: Pilot study to assess changes to Hawaii Island forest birds and their habitat - 2015 vegetation description dataset

The Hawaii Forest Bird Survey (HFBS) systematically characterized plant and bird communities across transects spanning all major Hawaiian Islands except O‘ahu. This extensive dataset has now been organized into a database and associated geographic information system (GIS) layers. This baseline provides an opportunity to assess how forest ecosystems and their constituent bird and...

Date published: January 1, 2018

Rat mark-recapture plot-area data in Hawaii Volcanoes National Park from 2015-2017

This is a selected data set that outlines the plot areas and trapping grids used to monitor 'Elepaio and black rat activity within Hawaii Volcanoes National Park (HAVO) from 2015-2017. These data provide the spatial reference and structure of four field plots used in the study. Please reference the associated metadata and datasets that correspond to this publication for more information on...