Craig Stricker - USGS

Trust Species & Habitats

Research Biologist

Duty Station:
Denver Field Station
c/o Bureau of Reclamation
P.O. Box 25007 86-68220
Denver, CO 80225-0007

Phone: 303-236-7908
Fax: 303.445.6328
Email: cstricker@usgs.gov

Current Research

• Effects of Climate Change on White-tailed Ptarmigan Using Genetics, Stable Isotopes, and Population Demographic Methodologies
• Tracking Clark's Nutcracker Movements and Population Structure Using Intrinsic Markers: Combining Genetic and Stable Isotope Signatures
• Nutritional Ecology: Stable Isotope Applications
• Biogeography: Stable Isotope Applications
• Biogeochemistry: Stable Isotope Applications
• Contaminant Biology: Stable Isotope Applications
• Causes of Variation in Hydrogen Isotope Composition of Pelagic Seabird Tissues

Publications

• Foraging segregation and genetic divergence between geographically proximate colonies of a highly mobile seabird
• Evidence of cryptic individual specialization in an opportunistic insectivorous bat
• Carbon and sediment accumulation in the Everglades (USA) during the past 4000 years: Rates, drivers, and sources of error
• Effects of trophic level and metamorphosis on discrimination of hydrogen isotopes in a plant-herbivore system
• Spawning salmon and the fitness of stream-dwelling fishes: Marine-derived nutrients show saturating effects on growth and energy storage in juvenile salmonids
• Carbon and nitrogen isotope discrimination factors for Steller sea lion vibrissae on milk and fish/squid diets
• Discrimination factors for 13C and 15N profiles of vibrissae from adult Steller sea lion females and their pups in utero and post parturition
• Spatial variation in the diets of female Steller sea lions inferred from 13C and 15N values of vibrissae from pups
• Carcass ecology: Forensic techniques shed light on the possible causes of bat susceptibility to turbines
• Effects of climate change on nutrition and genetics of White-tailed Ptarmigan [chapter 21]
• Emergent vegetation responses and influences on methylmercury production, export and bioaccumulation from rice-agriculture and managed wetlands of the Yolo Bypass Wildlife Area, California, U.S.A
• The role of critical zone processes in the evolution of the Prairie Pothole Region wetlands
• Using stable isotopes to understand hydrochemical processes in and around a Prairie Pothole wetland in the Northern Great Plains, USA
• Mercury bioaccumulation and biomagnification in Ozarkstream ecosystems
• Distribution of total mercury (THg) in California sea lions (Zalophus californianus) and their parasitic fauna
• Delayed age at weaning in Southeast Alaska Steller sea lions determined using stable isotopes of carbon and nitrogen
• Foraging ecology of bottlenose dolphins: a stable isotopic reconstruction over six decades
• Transfer of trace metals from streams to terrestrial food webs by emerging aquatic insects in mineralized alpine ecosystems
• Biologically-mediated flux of trace metals from streams to riparian spiders: a large scale survey in mineralized alpine ecosystems
• Effects of climate change on nutrition and genetics of White-tailed Ptarmigan
• Estimating locations for local extrema of stable isotope signatures in Steller sea lion vibrissae
• Benthic macroinvertebrate and fish communities in Lake Huron are linked to submerged groundwater vents
• Evolution of ore deposits and technology transfer project—isotope and chemical methods in support of the U.S. Geological Survey Science Strategy, 2003–2008
• Vibrissae growth rates: a tool for determining the timing of ecologically important events
• Evaluating the use of stable isotope analyses to infer sex-specific seasonal movements of silver-haired bats in northwestern California
• Inter-annual variation in the foraging ecology of a brown bear population in southwest Alaska
• Stable isotopes differentiate bottlenose dolphins off west-central Florida
• Are inland wolf–ungulate systems influenced by marine subsidies of Pacific salmon?
• Investigating variation in the nutritional ecology and genetics of white-tailed ptarmigan: implications for climate change
• Isotopic characterization of flight feathers in two Pelagic seabirds: Sampling strategies for ecological studies
• Methylmercury cycling, bioaccumulation, and export from agricultural and non-agricultural wetlands in the Yolo Bypass
• Modeling the dynamic geochemistry of prairie pothole wetlands
• Migratory structure and geographic origins of hoary bats (Lasiurus cinereus) inferred from stable isotope analysis
• Migratory structure and geographic origins of hoary bats (Lasiurus cinereus) inferred from stable isotope analysis
• Chemical and isotope perspectives on sources of sediment redistribution during large hurricanes along the Louisiana coast, USA
• Historical food web changes in Lake Michigan inferred from isotopic analysis of archived yellow perch scales
• Does a lack of design and repeatability compromise scientific criticism? A response to Smith et al. (2009)
• Isotope and Chemical Methods in Support of the U.S. Geological Survey Science Strategy, 2003-2008
• Stable Isotope and Trace Element Studies of Black Bear Hair, Big Bend Ecosystem, Texas and Mexico
• Discrimination of carbon and nitrogen isotopes from milk to serum and vibrissae in Alaska Steller sea lions (Eumetopias jubatus)
• Sulfur biogeochemistry in agricultural and natural wetlands: Linking food webs to sediment and water-column processes
• A novel approach to monitoring changes in the diet of lactating mothers through isotopic analysis of young Steller sea lion vibrissae
• Mercury cycling in agricultural and non-agricultural wetlands in the Yolo Bypass Wildlife Area, California: Water column processes
• Trace element and stable isotope studies of black bear hair, Big Bend National Park area, Texas and Mexico
• An Ecological and Stable Isotope Study of Food Web Linkages in Submerged Sinkhole Ecosystems of Lake Huron
• New developments in sulfur isotope analysis and applications to ecological research
• An automated cryo-focusing approach for sulfur isotope analysis of organic and other low-level sulfur materials
• Hair segment analysis of female Alaskan brown bears: resolving seasonal salmon consumption with sulfur isotopes
• Marine nutrient subsidies to freshwater and terrestrial ecosystems: Insights from stable isotopes
• Bottlenose dolphin population differentiation and trophic studies using carbon, nitrogen, and sulfur stable isotopes and stomach content analyses
• Stable isotope evidence that salmon are important to brown bears in southwestern Alaska
• Linking food webs and biogeochemical processes in wetlands: insights from sulfur isotopes
• Marine derived nutrients (MDN) in riverine ecosystems: developing monitoring tools for tracking MDN in Alaska watersheds
• The importance of hyporheic sediment respiration in several mid-order Michigan rivers: comparison between methods in estimates of lotic metabolism
• Sulfur dynamics and hydrologic interactions among prairie wetlands: the influence of landscape position and hydroperiod
• Effects of plant community composition and exposure to wave action on invertebrate habitat use of Lake Huron coastal wetlands
• A new chamber design for measuring community metabolism in a Michigan stream
• Development of a preliminary invertebrate index of biotic integrity for Lake Huron coastal wetlands