Branden L Johnson
I am an Ecologist at the USGS Forest and Rangeland Ecosystem Science Center
Science and Products
If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.
The lead (Pb) lining of agriculture‐related subsidies: enhanced Golden Eagle growth rates tempered by Pb exposure
Supplementary food resources (e.g., subsidies) associated with agriculture can benefit wildlife species, increasing predictability and availability of food. Avian scavengers including raptors often utilize subsidies associated with both recreational hunting and pest shooting on agricultural lands. However, these subsidies can contain lead (Pb) fragments if they are culled with Pb‐based ammunition,
Authors
Garth Herring, Collin Eagles-Smith, Jeremy A. Buck, Alyssa E. Shiel, Chris R. Vennum, Colleen Emery, Branden L. Johnson, David Leal, Julie A. Heath, Benjamin M Dudek, Charles R. Preston, Brian Woodbridge
Conifer density within lake catchments predicts fish mercury concentrations in remote subalpine lakes
Remote high-elevation lakes represent unique environments for evaluating the bioaccumulation of atmospherically deposited mercury through freshwater food webs, as well as for evaluating the relative importance of mercury loading versus landscape influences on mercury bioaccumulation. The increase in mercury deposition to these systems over the past century, coupled with their limited exposure to d
Authors
Collin A. Eagles-Smith, Garth Herring, Branden L. Johnson, Rick Graw
Invasive crayfish as vectors of mercury in freshwater food webs of the Pacific Northwest
Invasive species are important drivers of environmental change in aquatic ecosystems and can alter habitat characteristics, community composition, and ecosystem energetics. Such changes have important implications for many ecosystem processes, including the bioaccumulation and biomagnification of contaminants through food webs. Mercury concentrations were measured in 2 nonnative and 1 native crayf
Authors
Branden L. Johnson, James J. Willacker, Collin A. Eagles-Smith, Christopher A. Pearl, M. J. Adams
Mercury bioaccumulation in fishes from subalpine lakes of the Wallowa-Whitman National Forest, northeastern Oregon and western Idaho
Mercury (Hg) is a globally distributed pollutant that poses considerable risks to human and wildlife health. Over the past 150 years since the advent of the industrial revolution, approximately 80 percent of global emissions have come from anthropogenic sources, largely fossil fuel combustion. As a result, atmospheric deposition of Hg has increased by up to 4-fold above pre-industrial times. Becau
Authors
Collin A. Eagles-Smith, Garth Herring, Branden L. Johnson, Rick Graw
Wastewater dilution index partially explains observed polybrominated diphenyl ether flame retardant concentrations in osprey eggs from Columbia River Basin, 2008-2009
Several polybrominated biphenyl ether (PBDE) congeners were found in all 175 osprey (Pandion haliaetus) eggs collected from the Columbia River Basin between 2002 and 2009. ΣPBDE concentrations in 2008–2009 were highest in osprey eggs from the two lowest flow rivers studied; however, each river flowed through relatively large and populous metropolitan areas (Boise, Idaho and Spokane, Washington). W
Authors
Charles J. Henny, Robert A. Grove, James L. Kaiser, Branden L. Johnson, Chad V. Furl, Robert J. Letcher
North American osprey populations and contaminants: Historic and contemporary perspectives
Osprey (Pandion haliaetus) populations were adversely affected by DDT and perhaps other contaminants in the United States and elsewhere. Reduced productivity, eggshell thinning, and high DDE concentrations in eggs were the signs associated with declining osprey populations in the 1950s, 1960s, and 1970s. The species was one of the first studied on a large scale to bring contaminant issues into foc
Authors
Charles J. Henny, Robert A. Grove, James L. Kaiser, Branden L. Johnson
Assessment of contaminant exposure and effects on ospreys nesting along the Lower Duwamish River, Washington, 2006-07
We evaluated the effects of contaminants on osprey (Pandion haliaetus) nesting along the lower Duwamish River (LDR), Washington, and used the upper reach of the Willamette River (WR), Oregon, as a reference site. Osprey eggs and nestling blood (plasma) were collected at nests along the LDR (11 eggs, 7 plasmas) and WR (10 eggs, 6 plasmas) in 2006-07 and analyzed for contaminants. Additionally, hema
Authors
Branden L. Johnson, Charles J. Henny, James L. Kaiser, Jay W. Davis, Edmund P. Schulz
Polybrominated diphenyl ether flame retardants in eggs may reduce reproductive success of ospreys in Oregon and Washington, USA
Spatial and temporal assessments and reports of polybrominated diphenyl ether (PBDE) flame retardants in birds remain sparse. In the present study, PBDEs were detected in all 120 osprey (Pandion haliaetus) eggs collected. The eggs were collected from nests along the Columbia, Willamette and Yakima rivers of Oregon (OR) and Washington (WA) and in Puget Sound (WA) between 2002 and 2007. PBDE congene
Authors
C. J. Henny, J.L. Kaiser, R. A. Grove, B. L. Johnson, R.J. Letcher
Behavior and reproductive success of rock sandpipers breeding on the Yukon-Kuskokwim river delta, Alaska
We studied Rock Sandpiper (Calidris ptilocnemis) breeding behavior and monitored reproductive success from 1998 to 2005 on the Yukon-Kuskokwim River Delta, Alaska, USA. We banded 24 adults and monitored 45 nests. Annual return rate of adults ranged between 67 and 100%. Six pairs of Rock Sandpipers bred at our study site for ???2 years, and among these we did not observe mate change (i.e., when bot
Authors
M. Johnson, J.R. Conklin, B. L. Johnson, B. J. McCaffery, S. M. Haig, J. R. Walters
Prey of nesting ospreys on the Willamette and Columbia Rivers, Oregon and Washington
To more effectively use ospreys as a biomonitoring tool and to better assess contaminant pathways, the diet of nesting ospreys (Pandion haliaetus) was studied along the lower Columbia and upper mainstem Willamette rivers by evaluating prey remains collected from wire baskets constructed under artificial feeding perches installed near nest sites and from the ground beneath natural feeding perches a
Authors
B. L. Johnson, J.L. Kaiser, C. J. Henny, R. A. Grove
Science and Products
- Publications
If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.
The lead (Pb) lining of agriculture‐related subsidies: enhanced Golden Eagle growth rates tempered by Pb exposure
Supplementary food resources (e.g., subsidies) associated with agriculture can benefit wildlife species, increasing predictability and availability of food. Avian scavengers including raptors often utilize subsidies associated with both recreational hunting and pest shooting on agricultural lands. However, these subsidies can contain lead (Pb) fragments if they are culled with Pb‐based ammunition,AuthorsGarth Herring, Collin Eagles-Smith, Jeremy A. Buck, Alyssa E. Shiel, Chris R. Vennum, Colleen Emery, Branden L. Johnson, David Leal, Julie A. Heath, Benjamin M Dudek, Charles R. Preston, Brian WoodbridgeConifer density within lake catchments predicts fish mercury concentrations in remote subalpine lakes
Remote high-elevation lakes represent unique environments for evaluating the bioaccumulation of atmospherically deposited mercury through freshwater food webs, as well as for evaluating the relative importance of mercury loading versus landscape influences on mercury bioaccumulation. The increase in mercury deposition to these systems over the past century, coupled with their limited exposure to dAuthorsCollin A. Eagles-Smith, Garth Herring, Branden L. Johnson, Rick GrawInvasive crayfish as vectors of mercury in freshwater food webs of the Pacific Northwest
Invasive species are important drivers of environmental change in aquatic ecosystems and can alter habitat characteristics, community composition, and ecosystem energetics. Such changes have important implications for many ecosystem processes, including the bioaccumulation and biomagnification of contaminants through food webs. Mercury concentrations were measured in 2 nonnative and 1 native crayfAuthorsBranden L. Johnson, James J. Willacker, Collin A. Eagles-Smith, Christopher A. Pearl, M. J. AdamsMercury bioaccumulation in fishes from subalpine lakes of the Wallowa-Whitman National Forest, northeastern Oregon and western Idaho
Mercury (Hg) is a globally distributed pollutant that poses considerable risks to human and wildlife health. Over the past 150 years since the advent of the industrial revolution, approximately 80 percent of global emissions have come from anthropogenic sources, largely fossil fuel combustion. As a result, atmospheric deposition of Hg has increased by up to 4-fold above pre-industrial times. BecauAuthorsCollin A. Eagles-Smith, Garth Herring, Branden L. Johnson, Rick GrawWastewater dilution index partially explains observed polybrominated diphenyl ether flame retardant concentrations in osprey eggs from Columbia River Basin, 2008-2009
Several polybrominated biphenyl ether (PBDE) congeners were found in all 175 osprey (Pandion haliaetus) eggs collected from the Columbia River Basin between 2002 and 2009. ΣPBDE concentrations in 2008–2009 were highest in osprey eggs from the two lowest flow rivers studied; however, each river flowed through relatively large and populous metropolitan areas (Boise, Idaho and Spokane, Washington). WAuthorsCharles J. Henny, Robert A. Grove, James L. Kaiser, Branden L. Johnson, Chad V. Furl, Robert J. LetcherNorth American osprey populations and contaminants: Historic and contemporary perspectives
Osprey (Pandion haliaetus) populations were adversely affected by DDT and perhaps other contaminants in the United States and elsewhere. Reduced productivity, eggshell thinning, and high DDE concentrations in eggs were the signs associated with declining osprey populations in the 1950s, 1960s, and 1970s. The species was one of the first studied on a large scale to bring contaminant issues into focAuthorsCharles J. Henny, Robert A. Grove, James L. Kaiser, Branden L. JohnsonAssessment of contaminant exposure and effects on ospreys nesting along the Lower Duwamish River, Washington, 2006-07
We evaluated the effects of contaminants on osprey (Pandion haliaetus) nesting along the lower Duwamish River (LDR), Washington, and used the upper reach of the Willamette River (WR), Oregon, as a reference site. Osprey eggs and nestling blood (plasma) were collected at nests along the LDR (11 eggs, 7 plasmas) and WR (10 eggs, 6 plasmas) in 2006-07 and analyzed for contaminants. Additionally, hemaAuthorsBranden L. Johnson, Charles J. Henny, James L. Kaiser, Jay W. Davis, Edmund P. SchulzPolybrominated diphenyl ether flame retardants in eggs may reduce reproductive success of ospreys in Oregon and Washington, USA
Spatial and temporal assessments and reports of polybrominated diphenyl ether (PBDE) flame retardants in birds remain sparse. In the present study, PBDEs were detected in all 120 osprey (Pandion haliaetus) eggs collected. The eggs were collected from nests along the Columbia, Willamette and Yakima rivers of Oregon (OR) and Washington (WA) and in Puget Sound (WA) between 2002 and 2007. PBDE congeneAuthorsC. J. Henny, J.L. Kaiser, R. A. Grove, B. L. Johnson, R.J. LetcherBehavior and reproductive success of rock sandpipers breeding on the Yukon-Kuskokwim river delta, Alaska
We studied Rock Sandpiper (Calidris ptilocnemis) breeding behavior and monitored reproductive success from 1998 to 2005 on the Yukon-Kuskokwim River Delta, Alaska, USA. We banded 24 adults and monitored 45 nests. Annual return rate of adults ranged between 67 and 100%. Six pairs of Rock Sandpipers bred at our study site for ???2 years, and among these we did not observe mate change (i.e., when botAuthorsM. Johnson, J.R. Conklin, B. L. Johnson, B. J. McCaffery, S. M. Haig, J. R. WaltersPrey of nesting ospreys on the Willamette and Columbia Rivers, Oregon and Washington
To more effectively use ospreys as a biomonitoring tool and to better assess contaminant pathways, the diet of nesting ospreys (Pandion haliaetus) was studied along the lower Columbia and upper mainstem Willamette rivers by evaluating prey remains collected from wire baskets constructed under artificial feeding perches installed near nest sites and from the ground beneath natural feeding perches aAuthorsB. L. Johnson, J.L. Kaiser, C. J. Henny, R. A. Grove - News