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Filter Total Items: 495
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Year Published: 2016

Comparative demographics of a Hawaiian forest bird community

Estimates of demographic parameters such as survival and reproductive success are critical for guiding management efforts focused on species of conservation concern. Unfortunately, reliable demographic parameters are difficult to obtain for any species, but especially for rare or endangered species. Here we derived estimates of adult survival and...

Guillaumet, Alban; Woodworth, Bethany L.; Camp, Richard J.; Paxton, Eben H.
Guillaumet, A., B.L. Woodworth, R.J. Camp, and E.H. Paxton. 2015. Comparative demographics of a Hawaiian forest bird community. Journal of Avian Biology, 46: 1-12.

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Year Published: 2016

Evaluating abundance and trends in a Hawaiian avian community using state-space analysis

Estimating population abundances and patterns of change over time are important in both ecology and conservation. Trend assessment typically entails fitting a regression to a time series of abundances to estimate population trajectory. However, changes in abundance estimates from year-to-year across time are due to both true variation in...

Camp, Richard J.; Brinck, Kevin W.; Gorresen, P.M.; Paxton, Eben H.
Camp, R.J, K.W. Brinck, P.M. Gorresen, E.H. Paxton. 2015. Evaluating abundance and trends in a Hawaiian avian community using state-space analysis. Bird Conservation International, 1:1-18.

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Year Published: 2015

Avian disease and mosquito vectors in the Kahuku unit of Hawai`i Volcanoes National Park and Ka`u Forest Reserve

While avian disease has been well-studied in windward forests of Hawai‘i Island, there have been few studies in leeward Ka‘u. We surveyed four altitudinal sites ranging from 1,200 to 2,200 m asl in the Kahuku Unit of Hawai‘i Volcanoes National Park (Kahuku) and three altitudinal sites ranging from 1,200 to 1,500 m asl in the Ka...

Gaudioso, Jacqueline; Lapointe, Dennis; Atkinson, Carter T.; Egan, Ariel N.
Gaudioso-Levita, J.M., D.A. LaPointe., C. T. Atkinson, and A.N. Egan. 2015. Avian disease and mosquito vectors in the Kahuku unit of Hawai`i Volcanoes National Park and Ka`u Forest Reserve. Hawaii Cooperative Studies Unit Technical Report. TR HCSU-070. University of Hawaii at Hilo, 45 pp.

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Year Published: 2015

Current land bird distribution and trends in population abundance between 1982 and 2012 on Rota, Mariana Islands

The western Pacific island of Rota is the fourth largest human-inhabited island in the Mariana archipelago and designated an Endemic Bird Area. Between 1982 and 2012, 12 point-transect distance-sampling surveys were conducted to assess bird population status. Surveys did not consistently sample the entire island; thus, we used a ratio estimator to...

Camp, Richard J.; Brinck, Kevin W.; Gorresen, P. Marcos; Amidon, Fred A.; Radley, Paul M.; Berkowitz, S. Paul; Banko, Paul C.
Camp RJ, Brinck KW, Gorresen PM, Amidon FA, Radley PM, Berkowitz SP, Banko PC. 2015. Current land bird distribution and trends in population abundance between 1982 and 2012 on Rota, Mariana Islands. Journal of Fish and Wildlife Management 6(2):511–540; e1944-687X. doi: 10.3996/112014-JFWM-085

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Year Published: 2015

Aerial-broadcast application of diphacinone bait for rodent control in Hawai`i: Efficacy and non-target species risk assessment

Introduced rats (Rattus rattus, R. exulans, and R. norvegicus) have been implicated in the decline or extinction of numerous species of plants and animals in Hawai‘i. This study investigated the efficacy of aerial-broadcast application of Ramik® Green baits containing 50 ppm (0.005%) diphacinone in reducing rat and mouse populations and...

Foote, David; Spurr, Eric B.; Lindsey, Gerald D.; Forbes Perry, Charlotte
Spurr, E. B., D. Foote, G.D. Lindsey, and C.F. Perry. 2015. Aerial-broadcast application of diphacinone bait for rodent control in Hawai`i: Efficacy and non-target species risk assessment. Hawaii Cooperative Studies Unit Technical Report. TR HCSU-0071. University of Hawaii at Hilo. 28 pp.

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Year Published: 2015

Dim ultraviolet light as a means of deterring activity by the Hawaiian hoary bat Lasiurus cinereus semotus

Widespread bat fatalities at industrial wind turbines are a conservation issue with the potential to inhibit efficient use of an abundant source of energy. Bat fatalities can be reduced by altering turbine operations, but such curtailment decreases turbine efficiency. If additional ways of reducing bat fatalities at wind turbines were available...

Gorresen, P. Marcos; Cryan, Paul M.; Dalton, David C.; Wolf, Sandy; Johnson, Jessica A.; Todd, Christopher M.; Bonaccorso, Frank J.
Gorresen, P.M., P.M. Cryan, D. Dalton, J. Johnson, C. Todd, S. Wolf, and F.J. Bonaccorso. 2015. Dim ultraviolet light as a means of deterring activity by the Hawaiian hoary bat (Lasiurus cinereus semotus). Endangered Species Research 28:249-257.

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Year Published: 2015

Large-scale range collapse of Hawaiian forest birds under climate change and the need 21st century conservation options

Hawaiian forest birds serve as an ideal group to explore the extent of climate change impacts on at-risk species. Avian malaria constrains many remaining Hawaiian forest bird species to high elevations where temperatures are too cool for malaria's life cycle and its principal mosquito vector. The impact of climate change on Hawaiian forest birds...

Fortini, Lucas B.; Vorsino, Adam E.; Amidon, Fred A.; Paxton, Eben H.; Jacobi, James D.
Fortini, L.B., A.E. Vorsino, F.A. Amidon, E.H. Paxton, J.D. Jacobi. 2015. Large-Scale Range Collapse of Hawaiian Forest Birds under Climate Change and the Need 21st Century Conservation Options. PLOS ONE, 10: e0140389

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Year Published: 2015

Will the effects of sea-level rise create ecological traps for Pacific Island seabirds?

More than 18 million seabirds nest on 58 Pacific islands protected within vast U.S. Marine National Monuments (1.9 million km2). However, most of these seabird colonies are on low-elevation islands and sea-level rise (SLR) and accompanying high-water perturbations are predicted to escalate with climate change. To understand how SLR may impact...

Reynolds, Michelle H.; Courtot, Karen; Berkowitz, Paul; Storlazzi, Curt D.; Moore, Janet; Flint, Elizabeth
Reynolds, M.H., K.N. Courtot, P. Berkowitz, C.D. Storlazzi, J. Moore, and E. Flint. 2015. Will the Effects of Sea-Level Rise Create Ecological Traps for Pacific Island Seabirds? PLOS ONE.

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Year Published: 2015

Efforts to eradicate yellow crazy ants on Johnston Atoll: Results from Crazy Ant Strike Team IX, December 2014-June 2015

The ecologically destructive yellow crazy ant (YCA; Anoplolepis gracilipes) was first detected on Johnston Atoll in January 2010. Within eight months, the U.S. Fish and Wildlife Service had mobilized its first crazy ant strike team (CAST), a group of biologists dedicated to testing and identifying insecticidal baits to be used to eradicate the ant...

Banko, Paul C.; Peck, Robert W.; Donmoyer, Kevin; Kropidlowski, Stephan; Pollock, Amanda
Peck, Robert W., P. C. Banko, K. Donmoyer, S. Kropidlowski and A. Pollock. 2015. Efforts to eradicate yellow crazy ants on Johnston Atoll: Results from Crazy Ant Strike Team IX, December 2014-June 2015. Hawaii Cooperative Studies Unit Technical Report HCSU-067. Hawai`i Cooperative Studies Unit, University of Hawai`i at Hilo.

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Year Published: 2015

Book review: Mosquito eradication: The story of killing Campto

In 1826, the paradise that was the Hawaiian Islands was changed forever when the first mosquito species was accidentally introduced to the island of Maui. Though it has not lived up to its potential as a vector of human disease in the islands, Culex quinquefasciatus and the avian pathogens it transmits laid waste to...

Lapointe, Dennis
LaPointe, Dennis. 2015. Book review of Mosquito Eradication: The Story of Killing Campto. American Entomologist, 61: 192-192.

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Year Published: 2015

Modeling the complex impacts of timber harvests to find optimal management regimes for Amazon tidal floodplain forests

At the Amazon estuary, the oldest logging frontier in the Amazon, no studies have comprehensively explored the potential long-term population and yield consequences of multiple timber harvests over time. Matrix population modeling is one way to simulate long-term impacts of tree harvests, but this approach has often ignored common impacts of tree...

Fortini, Lucas B.; Cropper, Wendell P.; Zarin, Daniel J.
Fortini, L.B., W.P. Cropper, Jr., D.J. Zarin. 2015. Modeling the Complex Impacts of Timber Harvests to Find Optimal Management Regimes for Amazon Tidal Floodplain Forests. PLOS ONE, 10: e0136740.

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Year Published: 2015

Richness, diversity, and similarity of arthropod prey consumed by a community of Hawaiian forest birds.

We evaluated the diet richness, diversity, and similarity of a community of seven endemic and two introduced passerine birds by analyzing the composition of arthropod prey in fecal samples collected during 1994–1998 at Hakalau Forest National Wildlife Refuge, Hawai‘i Island. Most prey fragments were identified to order, but we also...

Banko, Paul C.; Peck, Robert W.; Brinck, Kevin W.; Leonard, David L.
Banko, P.C., R.W. Peck, K. W. Brinck, D. L. Leonard. 2015. Richness, diversity, and similarity of arthropod prey consumed by a community of Hawaiian forest birds. Hawaii Cooperative Studies Unit Technical Report HCSU-066. Hawai`i Cooperative Studies Unit, University of Hawai`i at Hilo, 38 pp.

Our scientists in the Northwest Region conduct impartial, multi- and interdisciplinary research and monitoring on a large range of natural-resource issues that impact the quality of life of citizens of the Northwest states of Idaho, Montana, Oregon, Washington, and Wyoming.

Filter Total Items: 301
This is an image taken in 2015 of Sperry Glacier in Glacier National Park.
September 15, 2015

Sperry Glacier, Sept. 25, 2015

This is an image taken in 2015 of Sperry Glacier in Glacier National Park. Accoriding to data released by the USGS, the warming climate has dramatically reduced the size of 39 glaciers in Montana since 1966, some by as much as 85 percent.

A little red bird being handled by scientist
August 31, 2015

Iiwi banded at Hakalau 1

Adult Iiwi being banded at Hakalau Forest National Wildlife Refuge, Hawaii

Man untangling a little red bird from a net.
August 31, 2015

iwi in net

Adult Iiwi being removed from a mist net which was used to capture the bird for banding

Sagebrush, grasses, and forbs in a shrub-steppe ecosystem
August 28, 2015

Sagebrush, grasses, and forbs in a shrub-steppe ecosystem

Determining aboveground biomass of sagebrush, grasses, and forbs is important for estimating fuel loads, measuring carbon storage, and assessing habitat quality in shrublands. Remote sensing may offer a more efficient alternative to common, labor intensive methods of measuring aboveground biomass that are difficult to apply across large areas. Researchers from the USGS are

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August 23, 2015

K1 West Transect – 2015

Permanent Site: K1 West Transect; Depth: 6.0 Meters (19.8 Feet); Distance from river mouth: 4.5 Kilometers (2.8 Miles) east; Pre/Post Dam Removal: 4 years post-dam removal; Lat/Long: 48.13592923,-123.51082988; Site Description: This is a shallow site. Sediment is a gravel/sand mixture. Both red (1:30 seconds) and brown seaweed was abundant and appears close to pre-dam

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August 21, 2015

A2 West Transect – 2015

Permanent Site: A2 West Transect; Depth: 12.9 Meters (Feet 42.3); Distance from river mouth: Kilometers 1.8 (1.1 Miles); Pre/Post Dam Removal: 4 years post-dam removal; Lat/Long: 48.14130295, -123.5883331; Site Description: One of our deeper sites at over 40 feet. Sediment is primarily sand/sandy mud with a few scattered boulders. Seaweeds have returned but are sparse and

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August 21, 2015

A2 East Transect – 2015

Permanent Site: A2 East Transect; Depth: 12.4 Meters (Feet 40.8); Distance from river mouth: Kilometers 1.8 (1.1 Miles); Pre/Post Dam Removal: 4 years post-dam removal; Lat/Long: 48.14130295, -123.58766124; Site Description: One of our deeper sites at over 40 feet. Sediment is primarily sand/sandy mud. Seaweeds have returned, mainly bull kelp Nereocystis luetkeana (0:14, 0

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August 20, 2015

F2 West Transect – 2015

Permanent Site: F2 West Transect; Depth: 11.2 Meters (36.9 Feet); Distance from river mouth: 1.5 Kilometers (0.9 Miles) east; Pre/Post Dam Removal: 4 years post-dam removal; Lat/Long: 48.15672004,-123.55036603; Site Description: Visibility is poor on video due to a large amount of surge on the day of the dive. Substrate is mainly a gravel - cobble mixture with an

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August 19, 2015

4SP1 West Transect – 2015

Permanent Site: 4SP1 - West Transect; Depth: 6.1 Meters (19.9 Feet); Distance from river mouth: 0.8 Kilometers (0.5 Miles) East; Pre/Post Dam Removal: 3 years post-dam removal; Lat/Long: 48.15257, -123.557376; Site Description: The site has converted from gravel/cobble substrate to all sand. Seaweed is completely absent. 
 

Image: USGS Documents 2015 Drought
August 16, 2015

USGS Documents 2015 Drought

A hydrologic technician from the USGS Idaho Water Science Center measures streamflow in Fall Creek near Anderson Ranch Dam in southwestern Idaho. The USGS is collecting data at hundreds of sites on rivers and streams in six western states to document the 2015 drought. USGS scientists will analyze the data to identify which rivers and streams may be most vulnerable to

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August 9, 2015

L1 East Transect – 2015

Permanent Site: L1 East Transect; Depth: 11.6 Meters (38.0 Feet); Distance from river mouth: 2.3 Kilometers (1.4 Miles) west; Pre/Post Dam Removal: 4 years post-dam removal; Lat/Long: 48.13957527,-123.59359993; Site Description: This transect is medium depth. Substrate is mainly fine sediment/sand/mud with a few scattered boulders (1:15 seconds). Seaweed has returned.

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August 9, 2015

L1 West Transect – 2015

Permanent Site: L1 West Transect; Depth: 11.4 Meters (37.3 Feet); Distance from river mouth: 2.3 Kilometers (1.4 Miles) west; Pre/Post Dam Removal: 4 years post-dam removal; Lat/Long: 48.13957527,-123.59427175; Site Description: This transect is medium depth. The first 20 meters contains scattered boulders (0:18 seconds). Where there are no boulders, substrate is still

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Our scientists in the Northwest Region conduct impartial, multi- and interdisciplinary research and monitoring on a large range of natural-resource issues that impact the quality of life of citizens of the Northwest states of Idaho, Montana, Oregon, Washington, and Wyoming.