Craig Stricker, PhD
Craig Stricker is a Research Biologist at the Fort Collins Science Center.
Science and Products
Filter Total Items: 17
No Result Found
Filter Total Items: 81
Delayed age at weaning in Southeast Alaska Steller sea lions determined using stable isotopes of carbon and nitrogen
No abstract available.
Authors
Lorrie D. Rea, A.R. Banks, Sean D. Farley, Craig A. Stricker, B. Fadely, J. Mellish, A. Christ, K. Pitcher
Foraging ecology of bottlenose dolphins: a stable isotopic reconstruction over six decades
No abstract available.
Authors
S.L. Rossman, N.B. Barros, Craig A. Stricker, P.H. Ostrom, R.S. Wells
Mercury bioaccumulation and biomagnification in Ozark stream ecosystems
Crayfish (Orconectes spp.), Asian clam (Corbicula fluminea), northern hog sucker (hog sucker; Hypentelium nigricans), and smallmouth bass (smallmouth; Micropterus dolomieu) from streams in southeastern Missouri (USA) were analyzed for total mercury (HgT) and for stable isotopes of carbon (δ13C), nitrogen (δ15N), and sulfur (δ34S) to discern Hg transfer pathways. HgT concentrations were generally l
Authors
Christopher J. Schmitt, Craig A. Stricker, William G. Brumbaugh
Biologically-mediated flux of trace metals from streams to riparian spiders: a large scale survey in mineralized alpine ecosystems
No abstract available.
Authors
J.M. Kraus, R. B. Wanty, T.S. Schmidt, D.M. Walters, C. A. Stricker
Distribution of total mercury (THg) in California sea lions (Zalophus californianus) and their parasitic fauna
No abstract available.
Authors
A.K. McGrew, T. M. O'Hara, F. Gulland, W. Van Bonn, Craig A. Stricker, L.R. Ballweber
Using stable isotopes to understand hydrochemical processes in and around a Prairie Pothole wetland in the Northern Great Plains, USA
Millions of internally drained wetland systems in the Prairie Potholes region of the northern Great Plains (USA and Canada) provide indispensable habitat for waterfowl and a host of other ecosystem services. The hydrochemistry of these systems is complex and a crucial control on wetland function, flora and fauna. Wetland waters can have high concentrations of SO2-4 due to the oxidation of large am
Authors
Christopher T. Mills, Martin B. Goldhaber, Craig A. Stricker, JoAnn M. Holloway, Jean Morrison, Karl J. Ellefsen, Donald O. Rosenberry, Roland S. Thurston
The role of critical zone processes in the evolution of the Prairie Pothole Region wetlands
The Prairie Pothole Region, which occupies 900,000 km2 of the north central USA and south central Canada, is one of the most important ecosystems in North America. It is characterized by millions of small wetlands whose chemistry is highly variable over short distances. The study involved the geochemistry of surface sediments, wetland water, and groundwater in the Cottonwood Lakes area of North Da
Authors
Martin B. Goldhaber, Christopher T. Mills, Craig A. Stricker, Jean Morrison
Transfer of trace metals from streams to terrestrial food webs by emerging aquatic insects in mineralized alpine ecosystems
No abstract available.
Authors
Johanna M. Kraus, R. B. Wanty, Travis S. Schmidt, David M. Walters, Craig A. Stricker
Effects of climate change on nutrition and genetics of White-tailed Ptarmigan
White-tailed Ptarmigan (Lagopus leucura) are well suited as a focal species for the study of climate change because they are adapted to cool, alpine environments that are expected to undergo unusually rapid climate change. We compared samples collected in the late 1930s, the late 1960s, and the late 2000s using molecular genetic and stable isotope methods in an effort to determine whether White-t
Authors
Sara J. Oyler-McCance, Craig A. Stricker, Judy St. John, Clait E. Braun, Gregory T. Wann, Cameron L. Aldridge
Benthic macroinvertebrate and fish communities in Lake Huron are linked to submerged groundwater vents
Groundwater can be an important source of nutrients and energy to aquatic ecosystems, but quantifying the inputs and biogeochemical importance remains challenging. A series of submerged groundwater vents in northern Lake Huron were examined to determine the linkage between groundwater nutrients and aquatic food webs. We collected samples of key food-web components from groundwater vent and referen
Authors
Sanders T. Garrison, B.A. Biddanda, Craig A. Stricker, S.C. Nold
Modeling the dynamic geochemistry of prairie pothole wetlands
No abstract available.
Authors
M.C. Goldhaber, C.T. Mills, Craig A. Stricker, J. W. LaBaugh, D. Mushet, N.H. Euliss
Isotopic characterization of flight feathers in two pelagic seabirds: Sampling strategies for ecological studies
We wish to use stable-isotope analysis of flight feathers to understand the feeding behavior of pelagic seabirds, such as the Hawaiian Petrel (Pterodroma sandwichensis) and Newell’s Shearwater (Puffinus auricularis newelli). Analysis of remiges is particularly informative because the sequence and timing of remex molt are often known. The initial step, reported here, is to obtain accurate isotope v
Authors
Anne E. Wiley, Peggy H. Ostrom, Craig A. Stricker, Helen F. James, Hasand Gandhi
Non-USGS Publications**
Burton, T.M., Uzarski, D.G., Gathman, J.P. et al. Wetlands (1999) 19: 869. doi:10.1007/BF03161789
Uzarski, D., Burton, T. & Stricker, C. Hydrobiologia (2001) 455: 137. doi:10.1023/A:1011929719866
**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: 17
No Result Found
Filter Total Items: 81
Delayed age at weaning in Southeast Alaska Steller sea lions determined using stable isotopes of carbon and nitrogen
No abstract available.
Authors
Lorrie D. Rea, A.R. Banks, Sean D. Farley, Craig A. Stricker, B. Fadely, J. Mellish, A. Christ, K. Pitcher
Foraging ecology of bottlenose dolphins: a stable isotopic reconstruction over six decades
No abstract available.
Authors
S.L. Rossman, N.B. Barros, Craig A. Stricker, P.H. Ostrom, R.S. Wells
Mercury bioaccumulation and biomagnification in Ozark stream ecosystems
Crayfish (Orconectes spp.), Asian clam (Corbicula fluminea), northern hog sucker (hog sucker; Hypentelium nigricans), and smallmouth bass (smallmouth; Micropterus dolomieu) from streams in southeastern Missouri (USA) were analyzed for total mercury (HgT) and for stable isotopes of carbon (δ13C), nitrogen (δ15N), and sulfur (δ34S) to discern Hg transfer pathways. HgT concentrations were generally l
Authors
Christopher J. Schmitt, Craig A. Stricker, William G. Brumbaugh
Biologically-mediated flux of trace metals from streams to riparian spiders: a large scale survey in mineralized alpine ecosystems
No abstract available.
Authors
J.M. Kraus, R. B. Wanty, T.S. Schmidt, D.M. Walters, C. A. Stricker
Distribution of total mercury (THg) in California sea lions (Zalophus californianus) and their parasitic fauna
No abstract available.
Authors
A.K. McGrew, T. M. O'Hara, F. Gulland, W. Van Bonn, Craig A. Stricker, L.R. Ballweber
Using stable isotopes to understand hydrochemical processes in and around a Prairie Pothole wetland in the Northern Great Plains, USA
Millions of internally drained wetland systems in the Prairie Potholes region of the northern Great Plains (USA and Canada) provide indispensable habitat for waterfowl and a host of other ecosystem services. The hydrochemistry of these systems is complex and a crucial control on wetland function, flora and fauna. Wetland waters can have high concentrations of SO2-4 due to the oxidation of large am
Authors
Christopher T. Mills, Martin B. Goldhaber, Craig A. Stricker, JoAnn M. Holloway, Jean Morrison, Karl J. Ellefsen, Donald O. Rosenberry, Roland S. Thurston
The role of critical zone processes in the evolution of the Prairie Pothole Region wetlands
The Prairie Pothole Region, which occupies 900,000 km2 of the north central USA and south central Canada, is one of the most important ecosystems in North America. It is characterized by millions of small wetlands whose chemistry is highly variable over short distances. The study involved the geochemistry of surface sediments, wetland water, and groundwater in the Cottonwood Lakes area of North Da
Authors
Martin B. Goldhaber, Christopher T. Mills, Craig A. Stricker, Jean Morrison
Transfer of trace metals from streams to terrestrial food webs by emerging aquatic insects in mineralized alpine ecosystems
No abstract available.
Authors
Johanna M. Kraus, R. B. Wanty, Travis S. Schmidt, David M. Walters, Craig A. Stricker
Effects of climate change on nutrition and genetics of White-tailed Ptarmigan
White-tailed Ptarmigan (Lagopus leucura) are well suited as a focal species for the study of climate change because they are adapted to cool, alpine environments that are expected to undergo unusually rapid climate change. We compared samples collected in the late 1930s, the late 1960s, and the late 2000s using molecular genetic and stable isotope methods in an effort to determine whether White-t
Authors
Sara J. Oyler-McCance, Craig A. Stricker, Judy St. John, Clait E. Braun, Gregory T. Wann, Cameron L. Aldridge
Benthic macroinvertebrate and fish communities in Lake Huron are linked to submerged groundwater vents
Groundwater can be an important source of nutrients and energy to aquatic ecosystems, but quantifying the inputs and biogeochemical importance remains challenging. A series of submerged groundwater vents in northern Lake Huron were examined to determine the linkage between groundwater nutrients and aquatic food webs. We collected samples of key food-web components from groundwater vent and referen
Authors
Sanders T. Garrison, B.A. Biddanda, Craig A. Stricker, S.C. Nold
Modeling the dynamic geochemistry of prairie pothole wetlands
No abstract available.
Authors
M.C. Goldhaber, C.T. Mills, Craig A. Stricker, J. W. LaBaugh, D. Mushet, N.H. Euliss
Isotopic characterization of flight feathers in two pelagic seabirds: Sampling strategies for ecological studies
We wish to use stable-isotope analysis of flight feathers to understand the feeding behavior of pelagic seabirds, such as the Hawaiian Petrel (Pterodroma sandwichensis) and Newell’s Shearwater (Puffinus auricularis newelli). Analysis of remiges is particularly informative because the sequence and timing of remex molt are often known. The initial step, reported here, is to obtain accurate isotope v
Authors
Anne E. Wiley, Peggy H. Ostrom, Craig A. Stricker, Helen F. James, Hasand Gandhi
Non-USGS Publications**
Burton, T.M., Uzarski, D.G., Gathman, J.P. et al. Wetlands (1999) 19: 869. doi:10.1007/BF03161789
Uzarski, D., Burton, T. & Stricker, C. Hydrobiologia (2001) 455: 137. doi:10.1023/A:1011929719866
**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.