A5011377757- Fish Ecology and Management Studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Soil and Water Nutrient Dynamics
- Hydrology and Sediment Transport Processes
- Aquatic Invertebrate Ecology and Behavior
- Geographic Information Systems Studies
- Archaeology and Natural History
- Hydrology and Watershed Management Studies
- Scientific Computing and Data Management
- Isotope Analysis in Ecology
- Analytical chemistry methods development
- Spaceflight effects on biology
- Planetary Science and Exploration
- Space Science and Extraterrestrial Life
- Botany, Ecology, and Taxonomy Studies
- Soil erosion and sediment transport
- Heavy Metal Exposure and Toxicity
- Human Mobility and Location-Based Analysis
- Arsenic contamination and mitigation
- Spacecraft Design and Technology
- Water Quality Monitoring and Analysis
- Water Quality and Resources Studies
- Marine and coastal ecosystems
- Reservoir Engineering and Simulation Methods
- Transboundary Water Resource Management
Defence Research and Development Canada
2022
United States Geological Survey
2011-2022
Upper Midwest Environmental Sciences Center
2012-2022
Joint Special Operations University
2022
Center for Security Studies
2022
United States Department of the Interior
2017
Entertainment Industries Council
2017
United States Military Academy
2017
Illinois Archaeological Survey
2013
North Central Soil Conservation Research Laboratory
2011
-Data from the original General Land Office (GLO) survey (1815) of 5th Principal Meridian were used to evaluate presettlement vegetation patterns in eastern Missouri and Arkansas. Data divided into three physiographic sections: Mississippi Alluvial Plain, Ozark Plateau Dissected Till Plain. Distances bearing trees diameters estimate tree density relative structure composition vegetation. The Plain was most densely timbered section. White oak (Quercus alba), black (Q velutina), sweet gum...
Summary Tributary inputs to lakes and seas are often measured at riverine gages, upstream of lentic influence. Between these gages the nearshore zones large waterbodies lie rivermouths, which may retain, transform contribute materials zone. However, magnitude timing rivermouth effects have rarely been measured. During summer 2011, 23 tributary systems Laurentian Great Lakes were sampled from river for dissolved particulate carbon (C), nitrogen (N) phosphorus (P) concentrations, as well bulk...
Spatial variation in food resources strongly influences many aspects of aquatic consumer ecology. Although large-scale controls over spatial are well known, others have received little study. Here we investigated the fatty acid (FA) composition seston and primary consumers within (i.e., among habitats) tributary systems Lake Michigan, USA. FA is important because all metazoans require certain FAs for proper growth development that cannot be produced de novo, including polyunsaturated acids...
Lake Erie is a large lake straddling the border of USA and Canada that has become increasingly eutrophic in recent years. Eutrophication particularly focused shallow western basin. The basin hydrodynamically similar to estuary, with riverine inputs from Detroit Maumee Rivers mixing together creating gradients chemical physical conditions. This study was driven by two questions: (1) How does secondary production food quality for consumers vary across this zone? (2) Are there correlations...
Abstract Water‐soluble 3 H‐labeled arsenic compounds were phenol‐extracted from mussels ( Mytilus edulis ) and seawater after exposure to [ H]monomethylarsonate (MMAA) H]dimethylarsinate (DMAA). Varying amounts of H] arsenobetaine found in seawater, depending upon the experimental conditions. The results indicate that is principally biosynthesized by microscopic organisms it bioaccumulated mussels. Total concentrations mussel flesh, byssal threads shells also determined, showing...
ABSTRACT This study provides one historical and two alternative future contexts for evaluating land cover modifications within the Upper Mississippi River (UMR) floodplain. Given previously documented changes in use, river engineering, restoration efforts hydro‐climatic UMR basin floodplain, we wanted to know which of these are most important determinants current projected floodplain cover. We used Geographic Information System data covering approximately 37% (3232 km 2 ) ca 1890 (pre‐lock...
Terrestrial agricultural activities strongly influence riverine nitrogen (N) dynamics, which is reflected in the δ15N of consumer tissues. However, processes within aquatic ecosystems also tissue δ15N. As become more important terrestrial inputs may a weaker predictor In previous study, this terrestrial-consumer connection was very strong at river sites, but disrupted by occurring rivermouths (the 'rivermouth effect'). This suggested that watershed indicators N loading might be accurate...
Abstract Large lakes provide a variety of ecological services to surrounding cities and communities. Many these are supported by processes that threatened the increasing prevalence cyanobacterial blooms which occur as aquatic ecosystems experience cultural eutrophication. Over past 10 yr, Lake Erie experienced severity frequency, have resulted in impaired drinking water for Cyanobacterial may impact support other services, but many impacts not been documented. Secondary production...
Abstract Efflux studies of radio‐labelled methylarsonic acid (MMA) and dimethylarsinic (DMA) encapsulated in liposomes afford the following permeability values for two arsenicals: 1.4 × 10 −13 cm s −1 4.5 −11 MMA DMA, respectively. These data are compared with octanol/water partition coefficients which 7.4 −3 8.4
Invasion of North American waters by nonnative Dreissena polymorpha and D. rostriformis bugensis has resulted in declines the Unionidae family native mussels. Dreissenid mussels biofoul unionid large numbers interfere with movement, their acquisition food, mussels' ability to open close shells. Initial expectations for Great Lakes included extirpation unionids where they co-occurred dreissenids, but recently adult juvenile have been found alive several apparent refugia. These populations may...
First posted November 29, 2021 For additional information, contact: Director, U.S. Geological Survey 12201 Sunrise Valley DriveReston, VA 20192 Managers of our Nation’s resources face unprecedented challenges driven by the convergence increasing, competing societal demands and a changing climate that affects stability, vulnerability, predictability those resources. To help meet these challenges, scientific community must take advantage all available technologies, data, integrative Earth...
First posted May 19, 2017 For additional information, contact: Core Science Analytics and SynthesisU.S. Geological Survey108 National Center12201 Sunrise Valley Drive,Reston, VA 20192 The Community for Data Integration (CDI) represents a dynamic community of practice focused on advancing science data information management integration capabilities across the U.S. Survey CDI community. This annual report describes various presentations, activities, outcomes monthly forums, working groups,...
A Decision Support System (DSS) can be defined in many ways. The working definition used by the U.S. Geological Survey Upper Midwest Environmental Sciences Center (UMESC) is, “A spatially based computer application or data that assists a researcher manager making decisions.” This is quite broad definition—and it needs to be, because possibilities for types of DSSs are limited only user group and developer’s imagination. There no one DSS; as diverse problems they help solve. diversity...