Threatened and Endangered Species
Threatened and Endangered Species
Filter Total Items: 105
Understanding Factors Affecting the Decline of the Samoan Swallowtail Butterfly
The Samoan swallowtail is a large and strikingly marked butterfly endemic to the Samoan Archipelago. Once widespread and common, its populations have declined dramatically. The Samoan swallowtail is a possible candidate as an indicator of ecosystem health for this oceanic island ecosystem.
Status and Trends of Hawaiian Flora and Fauna
Hawai‘i has more endangered species than any other state - over 394 species. In spite of this fact, there is not a central clearing house for information on the status and trends of these species. Information is spread over the following areas: 1. USGS maintains some information on Forest Birds. 2. USFWS maintains summary data on listed and proposed plants. 3. The University of Hawai‘i maintains...
Dynamics of a Koa Looper Moth Outbreak and Response by the Native Forest Community
A massive outbreak of the native koa looper moth (Scotorythra paludicola; Geometridae) defoliated more than a third of the koa (Acacia koa) forest on Hawai‘i Island during 2013–2014. Our objective was to record the dynamics of the koa looper (Scotorythra paludicola) outbreak and evaluate the response to the outbreak by the forest ecosystem generally as well as select native and invasive species...
Winter Manatee Foraging Behavior and the Decline of Seagrass Beds in the Northern Indian River Lagoon
With high numbers of manatees using the Florida Power and Light power plant warm water refuge during winter, their impact on the seagrass beds in the Indian River Lagoon is considered an important indicator of the long-term capacity of the area to support the manatees. USGS is working with partners to investigate the spatial extent and intensity of manatee use of seagrass beds in the area.
Identification of Previously Undocumented Florida Grasshopper Sparrow and Confirmation of the Current Population Status and Distribution
Population trends suggest that the Florida Grasshopper Sparrow may go extinct within five years. USGS research aims to collect demographic information to help identify the current status of the species.
Benthic Habitat Characterization and Habitat Use of Endangered Sea Turtles in Marine Protected Areas of the Greater Everglades
USGS assesses how federally endangered sea turtles use the habitat in and around a no-take area in the Dry Tortugas National Park.
Predicting Vulnerability of Southeastern Sea Turtle Nesting Beaches to Climate Change
Climate change may reduce the suitability of nesting and foraging habitat used by federally threatened and endangered species, like the Loggerhead sea turtle.
Sea Turtle Habitat Use at Buck Island Reef National Monument, U.S. Virgin Islands
USGS researchers tag and track endangered and threatened sea turtles to inform adaptive management strategies in marine protected areas.
Adaptive Habitat Conservation for Flatwoods Salamanders
USGS scientists investigate adaptive habitat conservation for Flatwoods salamanders.