Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 10382
The relationship between species density and community biomass in grazed and ungrazed coastal meadows The relationship between species density and community biomass in grazed and ungrazed coastal meadows
Previous studies have indicated that the relationship between community biomass and species density can be represented by a multivariate model in which abiotic variables influence species density both through effects on biomass and through effects on the species pool. In this paper, we use data from grazed and ungrazed coastal meadows in Finland to evaluate and extend this general...
Authors
James B. Grace, H. Jutila
Physical setting: Chapter 1 in Initial biotic survey of Lisbon Bottom, Big Muddy National Fish and Wildlife Refuge Physical setting: Chapter 1 in Initial biotic survey of Lisbon Bottom, Big Muddy National Fish and Wildlife Refuge
Lisbon Bottom consists of approximately 875 ha of river bottom along the Missouri River in Howard County, Missouri, from approximately river mile (RM) 213 to RM 219. As used in this report, the Lisbon Bottom area also includes the main channel of the Missouri River adjacent to the Lisbon Bottom and portions of the adjacent flood plain in Saline County, Missouri. Before regulation and...
Authors
Robert B. Jacobson, Mark S. Laustrup, Ellen A. Ehrhardt, Curt Niebur, Raymond E. Arvidson
Workshop summary, conclusions and recommendations Workshop summary, conclusions and recommendations
No abstract available.
Authors
W.H. Benson, R.T. Di Giulio, D. E. Tillitt, L. Birnbaum, P.L deFur, Jay W. Gooch, Ellen Mihaich, C. Tyler
Salinity as a constraint on growth of oligohaline marsh macrophytes. II. Salt pulses and recovery potential Salinity as a constraint on growth of oligohaline marsh macrophytes. II. Salt pulses and recovery potential
The ability of common oligohaline marsh macrophytes of the northern Gulf of Mexico coast to recover from pulses of increased salinity was investigated in a greenhouse experiment with Eleocharis palustris, Panicum hemitomon, Sagittaria lancifolia, and Scirpus americanus monocultures. Components of salinity pulses applied were final salinity reached (6 or 12 g/L), salinity influx rate (3 d...
Authors
R.J. Howard, I.A. Mendelssohn
Salinity as a constraint on growth of oligohaline marsh macrophytes. I. Species variation in stress tolerance Salinity as a constraint on growth of oligohaline marsh macrophytes. I. Species variation in stress tolerance
The effects of increased salinity on plant growth were examined in a greenhouse experiment with four species common to oligohaline marshes of the northern Gulf of Mexico: Eleocharis palustris, Panicum hemitomon, Sagittaria lancifolia, and Scirpus americanus. Effects of final salinity reached (6 or 12 g/L), salinity influx rate (3 d or 3 wk), and duration of exposure (1, 2, or 3 mo) were
Authors
R.J. Howard, I.A. Mendelssohn
Testing water quality for pesticide pollution: U.S. Geological Survey investigations reveal widespread contamination of the nation's water resources Testing water quality for pesticide pollution: U.S. Geological Survey investigations reveal widespread contamination of the nation's water resources
No abstract available.
Authors
Robert J. Gilliom, Jack E. Barbash, Dana W. Kolpin, Steven J. Larson
Examining freshwater-saltwater interface processes with four radium isotopes Examining freshwater-saltwater interface processes with four radium isotopes
No abstract available.
Authors
Peter W. Swarzenski
The effects of global climate change on seagrasses The effects of global climate change on seagrasses
The increasing rate of global climate change seen in this century, and predicted to accelerate into the next, will significantly impact the Earth's oceans. In this review, we examine previously published seagrass research through a lens of global climate change in order to consider the potential effects on the world's seagrasses. A primary effect of increased global temperature on...
Authors
Frederick T. Short, Hilary A. Neckles
Herpetology in the federal government: a personal view Herpetology in the federal government: a personal view
In late 1976, I received a phone call from an ichthyological colleague who asked if I would be willing to take a temporary position in the U.S. Fish and Wildlife Service's (FWS) Office of Endangered Species (OES) in Washington. They had a backlog of proposed and final rules that needed to be finished, and they thought that a 30-day stint by a temporary herpetologist would clear the slate...
Authors
C. Kenneth Dodd
Vegetative resistance to flow in South Florida: Summary of vegetation sampling at sites NESRS3 and P33, Shark River Slough, April 1996 Vegetative resistance to flow in South Florida: Summary of vegetation sampling at sites NESRS3 and P33, Shark River Slough, April 1996
The U.S. Geological Survey is one of many agencies participating in the effort to restore the south Florida Everglades. We are sampling and characterizing the vegetation at selected sites in the Everglades as part of a study to quantify vegetative flow resistance. The objectives of the vegetative sampling are (1) to provide detailed information on species composition, vegetative...
Authors
Virginia Carter, Henry A. Ruhl, Nancy B. Rybicki, Justin T. Reel, Patricia T. Gammon
Vegetative resistance to flow in south Florida: Summary of vegetation sampling at sites NESRS3 and P33, Shark River Slough, November, 1996 Vegetative resistance to flow in south Florida: Summary of vegetation sampling at sites NESRS3 and P33, Shark River Slough, November, 1996
The U.S. Geological Survey is one of many agencies participating in the effort to restore the South Florida Everglades. We are sampling and characterizing the vegetation at selected sites in the Everglades as part of a study to quantify vegetative flow resistance. The objectives of the vegetation sampling are (1) to provide detailed information on species composition, vegetation...
Authors
Virginia Carter, Justin T. Reel, Nancy B. Rybicki, Henry A. Ruhl, Patricia T. Gammon, Jonathan K. Lee