Robert E Anthony
Robert Anthony is a Research Geophysicist in the Earthquake Hazards Program.
Science and Products
Filter Total Items: 60
Links between atmosphere, ocean, and cryosphere from two decades of microseism observations on the Antarctic Peninsula Links between atmosphere, ocean, and cryosphere from two decades of microseism observations on the Antarctic Peninsula
The lack of landmasses, climatological low pressure, and strong circumpolar westerly winds between the latitudes of 50°S to 65°S produce exceptional storm‐driven wave conditions in the Southern Ocean. This combination makes the Antarctic Peninsula one of Earth's most notable regions of high‐amplitude wave activity and thus, ocean‐swell‐driven microseism noise in both the primary (direct...
Authors
Robert E. Anthony, Richard C. Aster, Daniel Mcgrath
Competitive interactions and resource partitioning between northern spotted owls and barred owls in western Oregon Competitive interactions and resource partitioning between northern spotted owls and barred owls in western Oregon
The federally threatened northern spotted owl (Strix occidentalis caurina) is the focus of intensive conservation efforts that have led to much forested land being reserved as habitat for the owl and associated wildlife species throughout the Pacific Northwest of the United States. Recently, however, a relatively new threat to spotted owls has emerged in the form of an invasive...
Authors
J. David Wiens, Robert G. Anthony, Eric D. Forsman
Survival and home-range size of Northern Spotted Owls in southwestern Oregon Survival and home-range size of Northern Spotted Owls in southwestern Oregon
In the Klamath province of southwestern Oregon, Northern Spotted Owls (Strix occidentalis caurina) occur in complex, productive forests that historically supported frequent fires of variable severity. However, little is known about the relationships between Spotted Owl survival and home-range size and the characteristics of fire-prone, mixed-conifer forests of the Klamath province. Thus...
Authors
Jason W. Schilling, Katie M. Dugger, Robert G. Anthony
Local weather, regional climate, and annual survival of the northern spotted owl Local weather, regional climate, and annual survival of the northern spotted owl
We used an information-theoretical approach and Cormack—Jolly—Seber models for open populations in program MARK to examine relationships between survival rates of Northern Spotted Owls and a variety of local weather variables and long-term climate variables. In four of the six populations examined, survival was positively associated with wetter than normal conditions during the growing...
Authors
E.M. Glenn, Robert E. Anthony, E.D. Forsman, G.S. Olson
Organochlorine contaminants in fishes from coastal waters west of Amukta Pass, Aleutian Islands, Alaska, USA Organochlorine contaminants in fishes from coastal waters west of Amukta Pass, Aleutian Islands, Alaska, USA
Organochlorines were examined in liver and stable isotopes in muscle of fishes from the western Aleutian Islands, Alaska, in relation to islands or locations affected by military occupation. Pacific cod (Gadus macrocephalus), Pacific halibut (Hippoglossus stenolepis), and rock greenling (Hexagrammos lagocephalus) were collected from nearshore waters at contemporary (decommissioned) and...
Authors
A. Keith Miles, Mark A. Ricca, Robert G. Anthony, James A. Estes
Sources of organochlorine contaminants and mercury in seabirds from the Aleutian archipelago of Alaska: Inferences from spatial and trophic variation Sources of organochlorine contaminants and mercury in seabirds from the Aleutian archipelago of Alaska: Inferences from spatial and trophic variation
Persistent organochlorine compounds and mercury (Hg) have been detected in numerous coastal organisms of the Aleutian archipelago of Alaska, yet sources of these contaminants are unclear. We collected glaucous-winged gulls, northern fulmars, and tufted puffins along a natural longitudinal gradient across the western and central Aleutian Islands (Buldir, Kiska, Amchitka, Adak), and an...
Authors
Mark A. Ricca, A. Keith Miles, Robert G. Anthony
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 60
Links between atmosphere, ocean, and cryosphere from two decades of microseism observations on the Antarctic Peninsula Links between atmosphere, ocean, and cryosphere from two decades of microseism observations on the Antarctic Peninsula
The lack of landmasses, climatological low pressure, and strong circumpolar westerly winds between the latitudes of 50°S to 65°S produce exceptional storm‐driven wave conditions in the Southern Ocean. This combination makes the Antarctic Peninsula one of Earth's most notable regions of high‐amplitude wave activity and thus, ocean‐swell‐driven microseism noise in both the primary (direct...
Authors
Robert E. Anthony, Richard C. Aster, Daniel Mcgrath
Competitive interactions and resource partitioning between northern spotted owls and barred owls in western Oregon Competitive interactions and resource partitioning between northern spotted owls and barred owls in western Oregon
The federally threatened northern spotted owl (Strix occidentalis caurina) is the focus of intensive conservation efforts that have led to much forested land being reserved as habitat for the owl and associated wildlife species throughout the Pacific Northwest of the United States. Recently, however, a relatively new threat to spotted owls has emerged in the form of an invasive...
Authors
J. David Wiens, Robert G. Anthony, Eric D. Forsman
Survival and home-range size of Northern Spotted Owls in southwestern Oregon Survival and home-range size of Northern Spotted Owls in southwestern Oregon
In the Klamath province of southwestern Oregon, Northern Spotted Owls (Strix occidentalis caurina) occur in complex, productive forests that historically supported frequent fires of variable severity. However, little is known about the relationships between Spotted Owl survival and home-range size and the characteristics of fire-prone, mixed-conifer forests of the Klamath province. Thus...
Authors
Jason W. Schilling, Katie M. Dugger, Robert G. Anthony
Local weather, regional climate, and annual survival of the northern spotted owl Local weather, regional climate, and annual survival of the northern spotted owl
We used an information-theoretical approach and Cormack—Jolly—Seber models for open populations in program MARK to examine relationships between survival rates of Northern Spotted Owls and a variety of local weather variables and long-term climate variables. In four of the six populations examined, survival was positively associated with wetter than normal conditions during the growing...
Authors
E.M. Glenn, Robert E. Anthony, E.D. Forsman, G.S. Olson
Organochlorine contaminants in fishes from coastal waters west of Amukta Pass, Aleutian Islands, Alaska, USA Organochlorine contaminants in fishes from coastal waters west of Amukta Pass, Aleutian Islands, Alaska, USA
Organochlorines were examined in liver and stable isotopes in muscle of fishes from the western Aleutian Islands, Alaska, in relation to islands or locations affected by military occupation. Pacific cod (Gadus macrocephalus), Pacific halibut (Hippoglossus stenolepis), and rock greenling (Hexagrammos lagocephalus) were collected from nearshore waters at contemporary (decommissioned) and...
Authors
A. Keith Miles, Mark A. Ricca, Robert G. Anthony, James A. Estes
Sources of organochlorine contaminants and mercury in seabirds from the Aleutian archipelago of Alaska: Inferences from spatial and trophic variation Sources of organochlorine contaminants and mercury in seabirds from the Aleutian archipelago of Alaska: Inferences from spatial and trophic variation
Persistent organochlorine compounds and mercury (Hg) have been detected in numerous coastal organisms of the Aleutian archipelago of Alaska, yet sources of these contaminants are unclear. We collected glaucous-winged gulls, northern fulmars, and tufted puffins along a natural longitudinal gradient across the western and central Aleutian Islands (Buldir, Kiska, Amchitka, Adak), and an...
Authors
Mark A. Ricca, A. Keith Miles, Robert G. Anthony
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.