Filter Total Items: 40
Oblique aerial photograph looking to the southwest along the southern end of Cedar Island, Virginia
Date Published: January 18, 2018
Status: Active

Long-Term Coastal Change

Goals of this project include developing and improving coastal-change assessments and supporting long-term planning and decision making to ensure sustainable coastal economies, infrastructure, and ecosystems. Research is part of the National Assessment of Coastal Change Hazards...

Oblique aerial photograph looking to the southwest along the southern end of Cedar Island, Virginia
Date Published: January 17, 2018
Status: Active

National Assessment of Coastal Change Hazards

Research to identify areas that are most vulnerable to coastal change hazards including beach and dune erosion, long-term shoreline change, and sea-level rise.

Kawela ridge, Moloka'i, Hawaii
Date Published: January 11, 2018
Status: Active

Studies on the Rapidly Eroding Reef

This study focuses on assessing changes in vegetation cover and composition inside and outside a fenced exclosure within the USGS Ridge-to-Reef study area on the island of Moloka‘i. This information will be delivered to federal, state, and private land managers who are trying to determine best management practices to reduce erosion and sediment runoff from this dry habitat which has been...

Rufus fantail nestlings
Date Published: December 29, 2017
Status: Active

Pacific Island Bird Survey Design and Data Analysis

Abundance data are collected for bird populations throughout the Pacific Islands by numerous federal, state, university, and non-profit organizations. In order to ensure data are standardized and available to researchers throughout the region, interagency bird databases have been created and continue to be used. These databases contain more than a million compiled, proofed, and standardized...

Koa flowers
Date Published: December 27, 2017
Status: Completed

Adaptation in Montane Plants

Montane plant communities in widely separated intact natural environments of the world have responded to changes in precipitation and temperature regimes by shifting both margins and core distributional ranges upward in elevation.  Reduced evapotranspiration rates in cooler climate zones at higher elevation may compensate for less precipitation and higher temperatures within species’ former...

Trained scent-detection dog and dog trainer at work in a taro field at Hanalei National Wildlife Refuge
Date Published: November 21, 2017
Status: Active

Efficacy of Avian Botulism Surveillance and Mitigation Using Detection Canines

Avian botulism causes waterbird mortality in Hawai‘i's wetlands and elsewhere. We will evaluate using trained scent-detection canines (sniffer dogs) as a new tool to survey for the presence of avian botulism. Biologists will compare variables influencing detection probability and detection rates with traditional search methods. The pilot study will test the feasibility of this approach as a...

Axis deer bounds through a grassy field
Date Published: August 11, 2017
Status: Completed

Invasive Mammals in the Pacific

The terrestrial biota of the Central Pacific is primarily defined by its degree of isolation.  At the center lies the Hawaiian Archipelago, which is more than 3,200 km from any continental land mass.  After tens of millions of years of evolutionary isolation from all mammals except bats, islands of the Central Pacific were quite suddenly besieged by a number of alien rodents, carnivores and...

Maui greenswords
Date Published: June 27, 2017

Hawai‘i Carbon Storage and Greenhouse Gas Flux Assessment

In recent years, the U.S. Geological Survey has been conducting a national biologic carbon sequestration assessment in the conterminous U.S.  The assessment is designed to meet the requirements of the Energy Independence and Security Act of 2007, which calls for coverage of all 50 states and all ecosystems (including forests, grasslands, wetlands, agricultural lands, and rivers, lakes, and...

Image: Hawaiian Coot (Fulica alai)
Date Published: June 22, 2017

Ecology of Hawaiian Waterbirds

Improvements in the understanding of the ecology of four endangered Hawaiian waterbirds (Hawaiian duck, Hawaiian coot, Hawaiian common moorhen and Hawaiian stilt) and more robust monitoring techniques are needed by State and Federal agencies in order implement effective recovery actions for these species.

Hawaiian hoary bat hangs upside down from tree at night
Date Published: June 14, 2017

Monitoring and Researching Bat Activity at Wind Turbines with Videography

The rapid expansion of wind energy nationwide is an important step toward reducing dependence on non-renewable sources of power.  However, the magnitude of the wildlife impacts at wind energy facilities is a newly recognized threat, and the cumulative long-term impacts to various bat species are of increasing concern.  It is estimated that more than 450,000 bat fatalities now occur each year...

Frigatebird showing red gular
Date Published: May 10, 2017

Disease Ecology In the Pacific Basin: Wildlife and Public Health Concerns

Both wildlife and human health in Hawai‘i and other island ecosystems in the Pacific Basin face continued threats from introductions of diseases and vectors. Accidental introduction of mosquito-borne avian malaria and pox virus to Hawai‘i is an outstanding example of how biological invasions can have a profound effect on endemic wildlife. The geographic distribution, density, and community...

Genetic diversity is critical to the success of captive breeding programs
Date Published: March 16, 2017

Population Genetics and Emergency Management of Two Kauai Island Endangered Species

The Challenge: The Akeke’e (Loxops caeruleirostris) and the Akikiki (Oreomystis bairdi), two species of Hawaiian honeycreeper, are critically endangered bird species endemic to high elevation ohia forests on the Hawaiian island of Kauai.  Both species have suffered severe population declines and range contractions in recent decades.  Akeke’e are currently thought to number ca. 950 wild...