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Filter Total Items: 495
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Year Published: 2014

Arthropods of Rose Atoll with special reference to ants and Pulvinaria Urbicola Scales (Hempitera Coccidae) on Pisonia Grandis trees

Rose Atoll, at the eastern end of the Samoan Archipelago, is a small but important refuge for seabirds, shorebirds, and sea turtles. While the vertebrate community is relatively well-studied, the terrestrial arthropod fauna, and its role in ecosystem function, are poorly known. Arthropods may be influencing the decline of Pisonia grandis, an...

Banko, Paul C.; Peck, Robert W.; Pendleton, Frank; Schmaedick, Mark; Ernsberger, Kelsie
Peck, R.W., P. Banko, F. Pendleton, M. Schmaedick, and K. Ernsberger. 2014. Arthropods of Rose Atoll with special reference to ants and Pulvinaria urbicola scales (Hemiptera: Coccidae) on Pisonia grandis trees. Hawaii Cooperative Studies Unit Technical Report. TR HCSU-0057, 25 pp.

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Year Published: 2014

Dynamics and ecological consequences of the 2013−2014 koa moth outbreak at Hakalau Forest National Wildlife Refuge.

A massive outbreak of the koa moth (Geometridea: Scotorythra paludicola) defoliated more than a third of the koa (Acacia koa) forest on Hawai‘i Island during 2013−2014. This was the largest koa moth outbreak ever recorded and the first on the island since 1953. The outbreak spread to sites distributed widely around the island between...

Banko, Paul C.; Peck, Robert W.; Yelenik, Stephanie G.; Paxton, Eben H.; Bonaccorso, Frank J.; Montoya-Aiona, Kristina; Foote, David
Banko, P.C. , R.W. Peck, S. G. Yelenik, E.H. Paxton, F.J. Bonaccorso, K. Montoya-Aiona, and D. Foote. 2014. Dynamics and ecological consequences of the 2013−2014 koa moth outbreak at Hakalau Forest National Wildlife Refuge. Hawaii Cooperative Studies Unit Technical Report. TR HCSU-0058, 88 pp.

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Year Published: 2014

Distribution and prevalence of knemidokoptic mange in Hawai`i `Amakihi on the island of Hawaii

Knemidokoptic mange was first observed on two Hawai‘i ‘Amakihi (Hemignathus virens) mist netted in Manuka Natural Area Reserve (NAR) on the Island of Hawai‘i in June 2007. Microscopic examination of skin scrapings from lesions of the infested individuals revealed the scaley-leg mite, Knemidokoptes jamaicensis. Continued...

Gaudioso, Jacqueline; LaPointe, Dennis; Atkinson, Carter T.; Apelgren, Chloe
Gaudioso, J.M., D.A. LaPointe, C.T. Atkinson and C. Apelgren. 2014. Distribution and prevalence of knemidokoptic mange in Hawai`i `Amakihi on the island of Hawaii. Hawaii Cooperative Studies Unit Technical Report. TR HCSU-0055. University of Hawaii at Hilo, 29 pp.

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Year Published: 2014

Evaluating the long-term management of introduced ungulates to protect the palila, an endangered bird, and its criticial habitat in subalpine forest of Mauna Kea, Hawai'i

Under the multiple-use paradigm, conflicts may arise when protection of an endangered species must compete with other management objectives. To resolve such a conflict in the Critical Habitat of the endangered Hawaiian honeycreeper, palila (Loxioides bailleui), federal courts ordered the eradication of introduced ungulates responsible for damaging...

Banko, Paul C.; Hess, Steven C.; Scowcroft, Paul G.; Farmer, Chris; Jacobi, James D.; Stephens, Robert M.; Camp, Richard J.; Leonard, David L.; Brinck, Kevin W.; Juvik, J.O.; Juvik, S. P.
Banko, P.C., S.C. Hess, P.G. Scowcroft, C. Farmer, J.D. Jacobi, R.M. Stephens, R.J. Camp, D.L. Leonard Jr, K.W. Brinck, J.O. Juvik, and S.P. Juvik. Evaluating the Long-Term Management of Introduced Ungulates to Protect the Palila, an Endangered Bird, and Its Critical Habitat in Subalpine Forest of Mauna Kea, Hawai‘i. Journal of Arctic, Antarctic, and Alpine Research, 46 :871-889

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Year Published: 2014

Productivity of forest birds at Hakalau Forest NWR

Hawai‘i has some of the most endangered avian species in the world, which face numerous threats from habitat loss, disease, climate change, and introduced species. This report details the results of a two-year productivity study of all forest bird species at Hakalau National Wildlife Refuge, Hawai‘i Island. We found and monitored nests...

Paxton, Eben H.; Cummins, George C; Kendall, Steven J.
Cummins, G.C., S.J. Kendall, and E.H. Paxton. 2014. Productivity of forest birds at Hakalau Forest NWR. Hawaii Cooperative Studies Unit Technical Report. TR HCSU-0056, 24 pp.

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Year Published: 2014

Palila restoration research, 1996−2012

The Palila Restoration Project was initiated in 1996 by the U.S. Geological Survey to assist government agencies mitigate the effects of realigning Saddle Road (Highway 200) through Palila Critical Habitat (U.S. Fish and Wildlife Service 1998, Federal Highway Administration 1999). Ecological research on the palila (Loxioides bailleui), an...

Banko, Paul C.; Farmer, Chris; Banko, Paul C.; Farmer, Chris; Atkinson, Carter T.; Brinck, Kevin W.; Camp, Richad; Cole, Colleen; Canner, Raymond; Dougill, Steve; Goltz, Daniel; Gray, Elizabeth; Hess, Steven C.; Higashino, Jennifer; Jarvi, Susan I.; Johnson, Luanne; Laniawe, Leona; Laut, Megan; Miller, Linda; Murray, Christopher J.; Nelson, Daniel; Leonard, David L.; Oboyshi, Peter; Patch-Highfill, Leanne; Pollock, David D.; Rapozo, Kalei; Schwarzfeld, Marla; Slotterback, John; Stephens, Robert M.
Banko, P. C., and C. Farmer. 2014. Implications of research for palila restoration. Pp. 460–493 in P. C. Banko and C. Farmer (editors). Palila restoration research, 1996−2012. Hawaiʽi Cooperative Studies Unit Technical Report HCSU-046. University of Hawaiʽi at Hilo, Hilo, HI.

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Year Published: 2014

Behavior of bats at wind turbines

Wind turbines are causing unprecedented numbers of bat fatalities. Many fatalities involve tree-roosting bats, but reasons for this higher susceptibility remain unknown. To better understand behaviors associated with risk, we monitored bats at three experimentally manipulated wind turbines in Indiana, United States, from July 29 to October 1, 2012...

Cryan, Paul M.; Gorresen, P. Marcos; Hine, Cris D.; Schirmacher, Michael; Diehl, Robert H.; Huso, Manuela M.; Hayman, David T.S.; Fricker, Paul D.; Bonaccorso, Frank J.; Johnson, Douglas H.; Heist, Kevin W.; Dalton, David C.
Behavior of bats at wind turbines; 2014; Article; Journal; Proceedings of the National Academy of Sciences; Cryan, Paul; Gorresen, Marcos; Hine, Cris D.; Schirmacher, Michael; Diehl, Robert H.; Huso, Manuela M.; Hayman, David T. S.; Fricker, Paul D.; Bonaccorso, Frank J.; Johnson, Douglas H.; Heist, Kevin; Dalton, David C.

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Year Published: 2014

Changes in Mauna Kea Dry Forest Structure 2000-2014

Changes in the structure of the subalpine vegetation of Palila Critical Habitat on the southwestern slope of Mauna Kea Volcano, Hawai‘i, were analyzed using 12 metrics of change in māmane (Sophora chrysophylla) and naio (Myoporum sandwicense) trees surveyed on plots in 2000 and 2014. These two dominant species were analyzed separately, and...

Banko, Paul C.; Brinck, Kevin W.
Brinck, K. W. and P.C. Banko. 2014. Changes in Mauna Kea Dry Forest Structure 2000-2014. Hawaii Cooperative Studies Unit Technical Report. TR HCSU-0054. University of Hawaii at Hilo, 20 pp.

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Year Published: 2014

Trends in conservation research and management in Hawai‘i over the past 20 years

Hawaiʻi, an archipelago of the most isolated inhabited islands on the planet, faces unique and extreme challenges to its biodiversity. We examined how the conservation community has responded to these challenges and how the responses have changed over time, using twenty years of abstracts from the Hawaiʻi Conservation Conference, a yearly...

Dutra Elliott, Daniela; Fortini, Lucas B.; Cameron Duffy, David
Elliott, D.D., L.B. Fortini, and D.C. Duffy. 2015. Trends in conservation research and management in Hawai‘i over the past 20 years. Pacific Conservation Biology, 20:392-400.

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Year Published: 2014

Low-flow characteristics of streams in the Lahaina District, West Maui, Hawai'i

The purpose of this study was to characterize streamflow availability under natural low-flow conditions for streams in the Lahaina District, west Maui, Hawaiʻi. The study-area streams included Honolua Stream and tributary Pāpua Gulch, Honokahua Stream and tributary Mokupeʻa Gulch, Kahana Stream, Honokōwai Stream and tributaries Amalu and Kapāloa...

Cheng, Chui Ling
Low-flow characteristics of streams in the Lahaina District, West Maui, Hawai'i; 2014; SIR; 2014-5087; Cheng, Chui Ling

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Year Published: 2014

Modeling Hawaiian ecosystem degradation due to invasive plants under current and future climates

Occupation of native ecosystems by invasive plant species alters their structure and/or function. In Hawaii, a subset of introduced plants is regarded as extremely harmful due to competitive ability, ecosystem modification, and biogeochemical habitat degradation. By controlling this subset of highly invasive ecosystem modifiers, conservation...

Vorsino, Adam E.; Fortini, Lucas B.; Amidon, Fred A.; Miller, Stephen E.; Jacobi, James D.; Price, Jonathan P.; `Ohukani`ohi`a Gon, Sam; Koob, Gregory A.
Modeling Hawaiian ecosystem degradation due to invasive plants under current and future climates; 2014; Article; Journal; PLoS One; Vorsino, Adam E.; Fortini, Lucas B.; Amidon, Fred A.; Miller, Stephen E.; Jacobi, James D.; Price, Jonathan P.; Gon, Sam 'Ohukani'ohi'a, III; Koob, Gregory A.

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Year Published: 2014

Hawaiian forest bird trends: using log-linear models to assess long-term trends is supported by model diagnostics and assumptions (reply to Freed and Cann 2013)

Freed and Cann (2013) criticized our use of linear models to assess trends in the status of Hawaiian forest birds through time (Camp et al. 2009a, 2009b, 2010) by questioning our sampling scheme, whether we met model assumptions, and whether we ignored short-term changes in the population time series. In the present paper, we address these...

Camp, Richard J.; Pratt, Thane K.; Gorresen, P. Marcos; Woodworth, Bethany L.; Jeffrey, John J.
Hawaiian forest bird trends: using log-linear models to assess long-term trends is supported by model diagnostics and assumptions (reply to Freed and Cann 2013); 2014; Article; Journal; Condor; Camp, Richard J.; Pratt, Thane K.; Gorresen, P. Marcos; Woodworth, Bethany L.; Jeffrey, John J.

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
 Algae samples at Bear Creek
June 23, 2015

A USGS researcher takes algae samples at Bear Creek in Redmond, WA.

A USGS researcher takes algae samples at Bear Creek in Redmond, Washington.

Douglas-fir trees topped to create snags for wildlife
May 29, 2015

Douglas-fir trees topped to create snags for wildlife habitat

Snags provide habitat for a wide range of organisms from cavity-nesting birds to insects, and are critical for maintaining forest biodiversity. Resource managers can create snags by topping trees to mitigate loss of snags to timber harvest, but information regarding changes in habitat for snag-dependent wildlife over time as created snags decay is lacking. Oregon State

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Re-vegetation in the river valley at the Elwha River restoration site.
March 31, 2015

Re-vegetation at the Elwha River restoration site.

Re-vegetation in the river valley at the Elwha River restoration site. Image available at Olympic National Park flickr site.

Centrifuge Bowl Containing River Suspended Sediment
February 5, 2015

Centrifuge Bowl Containing River Suspended Sediment for Analysis

A U.S. Geological Survey hydrologist holds a centrifuge bowl containing river suspended sediment for analysis of metals and organic chemicals. The sample was collected using a new in-field continuous-flow centrifugation technique to separate and collect suspended sediment from large volumes of water. The sample was collected on the Duwamish River, Washington in cooperation

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A USGS streamgage
January 14, 2015

A USGS streamflow gaging station is used to collect water data

A U.S. Geological Survey streamflow gaging station collects water data on the Trask River. The Trask River gage is located near Tillamook, Ore. and has been in operation for 17 years.  

USGS streamgage in foreground with river and trees in background
January 14, 2015

USGS streamgage on the Trask River

Trask River stage, discharge, and water-quality data are collected and used together to help monitor the current health of the river. Data from the river are sent to equipment in the gage house, where it is stored then transmitted to USGS servers. 

Capturing juvenile bull trout by electroshocking Logging Creek and then transporting them to another lake upstream.
December 31, 2014

Capturing juvenile bull trout by electroshocking in Logging Creek.

Capturing juvenile bull trout by electroshocking Logging Creek and then transporting them in a backpack up the trail to Grace Lake.

USGS scientist Adam Sepulveda sits with a sample of invasive northern pike in south central Alaska.
December 31, 2014

Sample of invasive northern pike in south central Alaska

USGS scientist Adam Sepulveda sits with a sample of invasive northern pike in south central Alaska.

An invasive American bullfrog with tracking device.
December 31, 2014

An invasive American bullfrog with tracking device.

An invasive American bullfrog with tracking device.  

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.