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Filter Total Items: 493
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Year Published: 2013

Response of palila and other subalpine Hawaiian forest bird species to prolonged drought and habitat degradation by feral ungulates

Extinction has claimed half of all historically-known Hawaiian passerines, and today many extant species are increasingly threatened due to the combined effects of invasive species and climate change. Habitat disturbance has affected populations of feeding specialists most profoundly, and our results indicate that specialists continue to be most...

Banko, Paul C.; Camp, Richard J.; Farmer, Chris; Brinck, Kevin W.; Leonard, David L.; Stephens, Robert M.
Response of palila and other subalpine Hawaiian forest bird species to prolonged drought and habitat degradation by feral ungulates; 2013; Article; Journal; Biological Conservation; Banko, Paul C.; Camp, Richard J.; Farmer, Chris ; Brinck, Kevin W.; Leonard, David L.; Stephens, Robert M.

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Year Published: 2013

Trends and shifts in streamflow in Hawaii, 1913-2008

This study addresses a need to document changes in streamflow and base flow (groundwater discharge to streams) in Hawai'i during the past century. Statistically significant long-term (1913-2008) downward trends were detected (using the nonparametric Mann-Kendall test) in low-streamflow and base-flow records. These long-term downward trends are...

Bassiouni, Maoya; Oki, Delwyn S.
Trends and shifts in streamflow in Hawaii, 1913-2008; 2013; Article; Journal; Hydrological Processes; Bassiouni, Maoya; Oki, Delwyn S.

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Year Published: 2012

Palila abundance estimates and trend

The Palila (Loxioides bailleui) is an endangered, seed-eating, finch-billed honeycreeper found only on Hawai`i Island. Once occurring on the islands of Kaua`i and O`ahu and Mauna Loa and Hualālai volcanoes of Hawai`i, Palila are now found only in subalpine, dry-forest habitats on Mauna Kea (Banko et al. 2002). Previous analyses showed that Palila...

Camp, Richad; Banko, Paul C.

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Year Published: 2012

The effects of feral cats on insular wildlife: the Club-Med syndrome

Domestic cats have been introduced to many of the world‘s islands where they have been particularly devastating to insular wildlife which, in most cases, evolved in the absence of terrestrial predatory mammals and feline diseases. We review the effects of predation, feline diseases, and the life history characteristics of feral cats and their...

Timm, R.M.; Hess, Steve C.; Danner, Raymond M.
The effects of feral cats on insular wildlife: the Club-Med syndrome; 2012; Article; Proceedings of the Vertebrate Pest Conference; Hess, Steve C.; Danner, Raymond M.

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Year Published: 2012

Availability and distribution of low flow in Anahola Stream, Kauaʻi, Hawaiʻi

Anahola Stream is a perennial stream in northeast Kauaʻi, Hawaiʻi, that supports agricultural, domestic, and cultural uses within its drainage basin. Beginning in the late 19th century, Anahola streamflow was diverted by Makee Sugar Company at altitudes of 840 feet (upper intake) and 280 feet (lower intake) for irrigating sugarcane in the Keālia...

Cheng, Chui Ling; Wolff, Reuben H.
Availability and distribution of low flow in Anahola Stream, Kauaʻi, Hawaiʻi; 2012; SIR; 2012-5264; Cheng, Chui Ling; Wolff, Reuben H.

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Year Published: 2012

Reversion to virulence and efficacy of an attenuated canarypox vaccine in Hawai'i 'Amakihi (Hemignathus Virens)

Vaccines may be effective tools for protecting small populations of highly susceptible endangered, captive-reared, or translocated Hawaiian honeycreepers from introduced Avipoxvirus, but their efficacy has not been evaluated. An attenuated Canarypox vaccine that is genetically similar to one of two passerine Avipoxvirus isolates...

Atkinson, Carter T.; Wiegand, Kimberly C.; Triglia, Dennis; Jarvi, Susan I.

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Year Published: 2012

One year of migration data for a western yellow-billed cuckoo

In 2009, we studied the migration of the Western Yellow-billed Cuckoo by capturing 13 breeding birds on the middle Rio Grande, New Mexico, and attaching a 1.5-g Mk 14-S British Antarctic Survey geolocator to each bird. In 2010, we recaptured one of the cuckoos, enabling us to download its geolocation data. The cuckoo had flown approximately 9500...

Sechrist, Juddson D.; Paxton, Eben H.; Ahlers, Darrell D.; Doster, Robert H.; Ryan, Vicky M.
One year of migration data for a western yellow-billed cuckoo; 2012; Article; Journal; Western Birds; Sechrist, Juddson D.; Paxton, Eben H.; Ahlers, Darrell D.; Doster, Robert H.; Ryan, Vicky M.

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Year Published: 2012

Low-flow characteristics of streams under natural and diversion conditions, Waipiʻo Valley, Island of Hawaiʻi, Hawaiʻi

Over the past 100 years, natural streamflow in Waipiʻo Valley has been reduced by the transfer of water out of the valley by Upper and Lower Hāmākua Ditches. The physical condition and diversion practices along the two ditch systems have varied widely over the years, and as a result, so have their effects on natural streamflow in Waipiʻo...

Fontaine, Richard A.
Low-flow characteristics of streams under natural and diversion conditions, Waipiʻo Valley, Island of Hawaiʻi, Hawaiʻi; 2012; SIR; 2011-5118; Fontaine, Richard A.

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Year Published: 2012

Elucidating spatially explicit behavioral landscapes in the Willow Flycatcher

Animal resource selection is a complex, hierarchical decision-making process, yet resource selection studies often focus on the presence and absence of an animal rather than the animal's behavior at resource use locations. In this study, we investigate foraging and vocalization resource selection in a population of Willow Flycatchers, Empidonax...

Bakian, Amanda V.; Sullivan, Kimberly A.; Paxton, Eben H.
Elucidating spatially explicit behavioral landscapes in the Willow Flycatcher; 2012; Article; Journal; Ecological Modelling; Bakian, Amanda V.; Sullivan, Kimberly A.; Paxton, Eben H.

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Year Published: 2012

Palynological composition of a Lower Cretaceous South American tropical sequence: Climatic implications and diversity comparisons with other latitudes.

Premise of the study: Reconstruction of floristic patterns during the early diversification of angiosperms is impeded by the scarce fossil record, especially in tropical latitudes. Here we collected quantitative palynological data from a stratigraphic sequence in tropical South America to provide floristic and climatic insights into such tropical...

Mejia-Velasquez, Paula J.; Dilcher, David L.; Jaramillo, Carlos A.; Fortini, Lucas B.; Manchester, Steven R.
Palynological composition of a Lower Cretaceous South American tropical sequence: Climatic implications and diversity comparisons with other latitudes.; 2012; Article; Journal; American Journal of Botany; Mejia-Velasquez, Paula J.; Dilcher, David L.; Jaramillo, Carlos A.; Fortini, Lucas B.; Manchester, Steven R.

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Year Published: 2012

Development of invertebrate community indexes of stream quality for the islands of Maui and Oahu, Hawaii

In 2009-10 the U.S. Geological Survey (USGS) collected physical habitat information and benthic macroinvertebrates at 40 wadeable sites on 25 perennial streams on the Island of Maui, Hawaiʻi, to evaluate the relations between the macroinvertebrate assemblages and environmental characteristics and to develop a multimetric invertebrate community...

Wolff, Reuben H.

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Year Published: 2012

2011 Kiwikiu (Maui Parrotbill) and Maui `Alauahio abundance estimates and the effect of sampling effort on power to detect a trend

The Kiwikiu (Pseudonestor xanthophrys), also called the Maui Parrotbill, is an endangered, forest bird found only in high elevation, wet forest of the eastern portion of Maui Island. Recent surveys, conducted at five year intervals, have revealed wide variation in abundance estimates (Camp et al. 2009). Effective management and conservation...

Brinck, Kevin W.; Camp, Richard J.; Gorresen, P. Marcos; Leonard, David L.; Mounce, Hanna L.; Iknayan, Kelly J.; Paxton, Eben H.
2011 Kiwikiu (Maui Parrotbill) and Maui `Alauahio abundance estimates and the effect of sampling effort on power to detect a trend; 2012; Other Government Series; HCSU-035; Brinck, Kevin W.; Camp, Richard J.; Gorresen, P. Marcos; Leonard, David L; Mounce, Hanna L.; Iknayan, Kelly J.; Paxton, Eben H.

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
August 27, 2013

GP1 East Transect – 2013

Permanent Control Site: GP1 East Transect; Depth: 7.2 Meters (23.5 Feet); Distance from river mouth: 19.0 Kilometers (11.8 Miles) east; Pre/Post Dam Removal: 2 years post-dam removal; Lat/Long: 48.11852521,-123.31538047; Site Description: This site was established as the eastern control. Depth is medium-shallow. Substrate is mainly a gravel/sand/cobble mixture surrounding

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August 26, 2013

A2 West Transect – 2013

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: 2 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 scattered boulders. Seaweeds continue to be scarce and mainly

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August 26, 2013

D2 East Transect – 2013

Permanent Site: D2 East Transect; Depth: 11.8 Meters (38.7 Feet); Distance from river mouth: 0.3 Kilometers (0.2 Miles); Pre/Post Dam Removal: 2 years post-dam removal; Lat/Long: 48.15233001,-123.56829403; Site Description: This site is right off the mouth of the river. Substrate is mainly gravel with some sand and cobble. No live seaweeds are present. Only the dead stalks

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August 26, 2013

D2 West Transect – 2013

Permanent Site: D2 West Transect; Depth: 11.9 Meters (39.0 Feet); Distance from river mouth: 0.3 Kilometers (0.2 Miles); Pre/Post Dam Removal: 2 years post-dam removal; Lat/Long: 48.15233001,-123.56896603; Site Description: This site is right off the mouth of the river. Substrate is mainly gravel with some sand and cobble. Woody debris is seen (2:13 seconds). No live

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August 16, 2013

J1 West Transect – 2013

Permanent Site: J1 West Transect; Depth: 9.3 Meters (30.5 Feet); Distance from river mouth: 6.6 Kilometers (4.1 Miles) east; Pre/Post Dam Removal: 2 years post-dam removal; Lat/Long: 48.13607725,-123.48002186; Site Description: This site is medium depth. Substrates has remained mainly a gravel/sand mixture. Seaweed density is still greatly decreased. Five species of brown

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August 16, 2013

H1 West Transect – 2013

Permanent Site: H1 West Transect; Depth: 5.9 Meters (Feet 19.2); Distance from river mouth: 2.4 Kilometers (1.5 Miles) east; Pre/Post Dam Removal: 2 years post-dam removal; Lat/Long: 48.14803012,-123.53535558; Site Description: This is a shallow site and one of the farthest removed from the effects of the sediment plume outside of the control sites. Substrate is still

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August 16, 2013

J1 East Transect – 2013

Permanent Site: J1 East Transect; Depth: 9.1 Meters (30.0 Feet); Distance from river mouth: 6.7 Kilometers (4.1 Miles) east; Pre/Post Dam Removal: 2 years post-dam removal; Lat/Long: 48.13607725,-123.47935008; Site Description: This site is medium depth. Substrates has remained mainly a gravel/sand mixture. Seaweed density is still greatly decreased. Four species of brown

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August 16, 2013

H1 East Transect – 2013

Permanent Site: H1 East Transect; Depth: 5.4 Meters (Feet 17.8); Distance from river mouth: 2.4 Kilometers (1.5 Miles) east; Pre/Post Dam Removal: 2 years post-dam removal; Lat/Long: 48.1479177,-123.53472865; Site Description: This is a shallow site and one of the farthest removed from the effects of the sediment plume outside of the control sites. Substrate is still

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August 15, 2013

GP1 West Transect – 2013

Permanent Control Site: GP1 West Transect; Depth: 7.7 Meters (25.3 Feet); Distance from river mouth: 19.0 Kilometers (11.8 Miles) east; Pre/Post Dam Removal: 2 years post-dam removal; Lat/Long: 48.11852521,-123.31605203; Site Description: This site was established as the eastern control. Depth is medium-shallow. Substrate is mainly a gravel/sand/cobble mixture surrounding

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August 15, 2013

GP2 West Transect – 2013

Permanent Control Site: GP2 West Transect; Depth: 12.3 Meters (40.4 Feet); Distance from river mouth: 18.8 Kilometers (11.6 Miles) east; Pre/Post Dam Removal: 2 years post-dam removal; Lat/Long: 48.12781102,-123.31712832; Site Description: This site was established as the eastern control. Substrate is mainly a gravel/sand/cobble mixture surrounding boulders. Red, green and

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August 14, 2013

E2 East Transect – 2013

Permanent Site: E2 East Transect; Depth: 14.9 Meters (48.8 Feet); Distance from river mouth: 0.9 Kilometers (0.5 Miles) east; Pre/Post Dam Removal: 2 years post-dam removal; Lat/Long: 48.15653002,-123.56130401; Site Description: This is one of our deeper sites. Substrate is mainly gravel/cobble with an occasional boulder. Seaweed is absent. Featherduster tubes worms (

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August 14, 2013

4SP1 East Transect – 2013

Permanent Site: 4SP1 - East Transect; Depth: 5.9 Meters (19.3 Feet); Distance from river mouth: 0.8 Kilometers (0.5 Miles) East; Pre/Post Dam Removal: 2 years post-dam removal; Lat/Long: 48.15257, -123.556704; Site Description: The former gravel/cobble substrate has been completely buried in sand. No live seaweeds are present. Only the bare stalks from the perennial kelp

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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.