Science Explorer
Exploring: Benthic Ecosystems
The USGS Comprehensive Sturgeon Research Program is a multi-year, interdisciplinary research study to determine factors leading to spawning and survival of the endangered pallid sturgeon and the closely related shovelnose sturgeon.
Food‐web structure and ecosystem function in the Laurentian Great Lakes—Toward a conceptual model
The relationship between food‐web structure (i.e., trophic connections, including diet, trophic position, and habitat use, and the strength of these connections) and ecosystem functions (i.e., biological, geochemical, and physical processes in an ecosystem, including decomposition, production, nutrient cycling, and nutrient and energy flows among...
Attribution: Great Lakes Science Center, Ecosystems
Linkages between hydrology and seasonal variations of nutrients and periphyton in a large oligotrophic subalpine lake
Periphyton is important to lake ecosystems, contributing to primary production, nutrient cycling, and benthic metabolism. Increases in periphyton growth in lakes can be indicative of changes in water quality, shifts in ecosystem structure, and increases in nutrient fluxes. In oligotrophic lakes, conservationists are interested in characterizing...
Attribution: Nevada Water Science Center, Water Resources
Dr. James E. McKenna, Jr. is a Research Ecologist with the Tunison Laboratory of Aquatic Science (TLAS, USGS/GLSC) in Cortland, NY. He has an M.S. and a Ph.D. in Biological Oceanography from the University of Rhode Island. He came to Central New York after studying fish community and fisheries issues in the Antarctic and Florida. He has...
Robin Stewart has been a research hydrologist with U.S. Geological Survey's National Research Program (NRP) in Menlo Park since 2003. She received an undergraduate degree in Biology from the University of Victoria, British Columbia Canada in 1991 and a PhD in ecotoxicology from the University of Manitoba in 1998. Immediately following...
I received a B.A. in Chemistry and an M.S. in Civil Engineering, both from the University of Minnesota. My Master’s thesis research examined historical patterns of mercury deposition using lake sediment cores, and other aspects of aquatic mercury cycling. I joined the U.S. Geological Survey in 1991, and worked for several years...
Education:
- Harvard University: Ph.D. Geology (1977)
- Harvard University: M.A. Geology (1974)
- Colgate University: B.A. Geology (1972)
- Senior Geologist US Geological Survey (2010-present)
- Research Geologist US Geological Survey (...
Dr. Robert B. Jacobson received his Ph.D. from the Department of Geography and Environmental Engineering, Whiting School of Engineering, The Johns Hopkins University, and he holds an undergraduate degree in Geology from Carleton College. He has worked for the U.S. Geological Survey for 35 years in geologic hazards, neotectonics,...
As Coordinator of the Climate Research & Development Program, I oversee interdisciplinary research projects that investigate how changes in climate, environment, and land use affect critical habitats and ecosystems over a range of spatial and temporal scales and provide data and tools to support effective management strategies.
Land Resources, Climate Research and Development Program, Land Change Science Program, Florence Bascom Geoscience Center
This study utilizes genetics and genomics techniques to characterize biodiversity and genetic connectivity among deep-sea coral habitats and cold seeps in and near submarine canyons and will use environmental DNA techniques to characterize plankton diversity and to identify key contributors to carbon export from surface waters that sustain...
Mark has worked at USGS, Columbia Environment Research Cener since 1997. His major responsibilities include research in all areas of aquatic ecology, fish biology, behavioral ecology, ecological modeling, and climate change in understanding for and support of conservation and recovery efforts. His expertise includes: at-risk, threatened, and...
My research characterizes processes and mechanisms of metal sorption reactions through field studies and lab experiments to better understand the metal transport and natural attenuation in mine contaminated systems and to better understand geochemical processes affecting bioavailability of metal contaminants to aquatic organisms....
I study fisheries, with a focus on restoration of lake trout in the Great Lakes, suppression of lake trout in western lakes, and state-tribal management of walleye in inland lakes. I earned my B.S. degree from the University of Wisconsin–Stevens Point, M.S. from Cornell University, and Ph.D. from Michigan State University....
In my 27 year tenure as a scientist and Program manager with the USGS, I have successfully directed and have actively participated as a team member on numerous large multidisciplinary and multi-agency teams as part of the Toxic Substances Hydrology Program, National Water Quality Assessment Program, and the Cooperative Water Program. The...
My interests span the coastal zone, from seacliff erosional processes to sediment dynamics in the shallow coastal ocean. My research focuses on the quantitative study of hydrodynamics, sediment transport, and geomorphology in coastal and marine environments.
Natural Hazards, Coastal/Marine Hazards and Resources, Pacific, Pacific Coastal and Marine Science Center
This dataset contains two tables of sampling information and size and mass measurements of the Baltic Tellin (Macoma balthica) from sites in Cook Inlet, Alaska, USA, and the Baie de Somme estuary, France.
A native of Rochester NY, Dr. Marvin-DiPasquale is Project Chief of the USGS-Earth Systems Processes Divison (ESPD) effort "“Biogeochemical Cycling at Regional Scales”. He completed a B.S. in Chemistry at SUNY StonyBrook in 1987, and a Ph.D. in 1995 from University of Maryland, Marine and Estuarine...
My interest in coastal ecology focuses on understanding the role of species interactions in structuring shallow, benthic, marine ecosystems in the face of changing environmental conditions.My research investigates how patterns of variation in benthic invertebrate prey can influence the abundance and distribution of predators.
1977 to Present: Project Chief (grade: Senior Research Scientist, March, 1999). United States Geological Survey, Water Resources Division, Menlo Park, CA.2013 to Present: Adjunct Professor, Department of Microbiology and Environmental Toxicology, University of California at Santa...
Larry R. Brown is a Research Biologist with the U.S. Geological Survey, California Water Science Center. Dr. Brown has over 35 years experience working in California aquatic systems. He is a recognized expert on the ecology of California fishes and has published on California fishes, benthic macroinvertebrates and benthic...