Publications
Read publications and other informational products to learn more about USGS science occurring in the Mississippi Basin.
Filter Total Items: 5567
A comparison of wetland tree growth response to hydrologic regime in Louisiana and South Carolina A comparison of wetland tree growth response to hydrologic regime in Louisiana and South Carolina
Numerous investigations have examined the growth of wetland tree species under a variety of hydrologic conditions. Most studies have compared flooded versus non-flooded conditions in greenhouses or in one to a few field sites near each other or within the same region. Comparisons of wetland tree growth among widely separated areas of the country are rare. This study compared the diameter...
Authors
Bobby D. Keeland, William Conner, Rebecca R. Sharitz
A SAS® code to correct for non-normality and non-constant variance in regression and anova models using the box-cox method of power transormation A SAS® code to correct for non-normality and non-constant variance in regression and anova models using the box-cox method of power transormation
A computer program written in SAS ® code for the Box–Cox family of power transformations is presented. The purpose of the program is to suggest a power transformation for the positive continuous response variables in only regression and ANOVA models. A brief overview of data transformation in regression and analysis of variance is given.An example using real data from the U.S...
Authors
Ziad A. Malaeb
Historical land-use changes and potential effects on stream disturbance in the Ozark Plateaus, Missouri Historical land-use changes and potential effects on stream disturbance in the Ozark Plateaus, Missouri
Land-use changes have been blamed for creating disturbance in the morphology of streams in the Ozark Plateaus, Missouri (hereafter referred to as the "Ozarks"). Historical evidence and stratigraphic observations document that streams have been aggraded by substantial quantities of gravel beginning sometime at or near the time of European settlement of the Ozarks. Before European...
Authors
Robert B. Jacobson, Alexander T. Primm
Effects of 3,3′,4,4′,5-pentachlorobiphenyl (PCB 126), 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), or an extract derived from field-collected cormorant eggs injected into double-crested cormorant (Phalacrocorax auritus) eggs Effects of 3,3′,4,4′,5-pentachlorobiphenyl (PCB 126), 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), or an extract derived from field-collected cormorant eggs injected into double-crested cormorant (Phalacrocorax auritus) eggs
Double-crested cormorant (Phalacrocorax auritus) eggs were injected with either 3,3′,4,4′,5-pentachlorobiphenyl (PCB 126), 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), or an extract derived from field-collected double-crested cormorant eggs. These compounds were injected into the yolks of cormorant eggs from an isolated colony on Lake Winnipegosis, Manitoba, Canada. Upon hatching, chicks...
Authors
Debra C. Powell, Richard J. Aulerich, John C. Meadows, Donald E. Tillitt, Jon F. Powell, Janelle C. Restum, Kenneth L. Stromborg, John P. Giesy, Steven J. Bursian
Pesticides and volatile organic compounds in shallow urban groundwater Pesticides and volatile organic compounds in shallow urban groundwater
No abstract available.
Authors
D.W. Kolpin, P. J. Squillace, J.E. Barbash, J.S. Zogorski
Occurrence of selected organochlorine compounds in fish tissue from eastern Iowa streams, 1995 Occurrence of selected organochlorine compounds in fish tissue from eastern Iowa streams, 1995
Human activities have caused dramatic changes to our Nation's landscape for over a century. Use of synthetic organic compounds in agriculture and industry has resulted in the accumulation and persistence of some of these compounds in natural systems. Concern has arisen over the contamination of our Nation's waters and the organisms that depend on them.
Authors
Linda R. Roberts
Woody debris decomposition in the Atchafalaya River Basin of Louisiana following hurricane disturbance Woody debris decomposition in the Atchafalaya River Basin of Louisiana following hurricane disturbance
The contribution of woody debris to some biogeochemical functions of forested wetlands was examined in the Atchafalaya River Basin in Louisiana following disturbance by Hurricane Andrew. Woody debris decomposition processes were characterized in terms of mass, C, N, and P dynamics. These were compared between different diameters of debris, areas recieving different intensities of...
Authors
Michael D. Rice, B. Graeme Lockaby, J.A. Stanturf, Bobby D. Keeland
Dynamic flood monitoring in coastal environments Dynamic flood monitoring in coastal environments
No abstract available.
Authors
Elijah Ramsey III
An introduction to visual programming for biologists An introduction to visual programming for biologists
No abstract available.
Authors
Jacoby Carter, Steven Castille
Polychlorinated dibenzo-p-dioxins, dibenzofurans, biphenyls and 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalents in fishes from Saginaw Bay, Michigan Polychlorinated dibenzo-p-dioxins, dibenzofurans, biphenyls and 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalents in fishes from Saginaw Bay, Michigan
Concentrations of polychlorinated biphenyls (PCBs), polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), polychlorinated naphthalenes (PCNs), polychlorinated dibenzothiophenes (PCDTs), and 2,3,7,8-tetrachlo-rodibenzo-p-dioxin (2,3,7,8-TCDD) equivalents were measured in composite samples of forage fishes and several sizes of walleyes (Stizostedion vitreum) and...
Authors
John P. Giesy, David J. Jude, Donald E. Tillitt, Robert W. Gale, John C. Meadows, James L. Zajieck, Paul H. Peterman, David A. Verbrugge, J. Thomas Sanderson, Ted R. Schwartz, Marc L. Tuchman
Organochlorine contaminants in double-crested cormorants from Green Bay, Wisconsin: II. Effects of an extract derived from cormorant eggs on the chicken embryo Organochlorine contaminants in double-crested cormorants from Green Bay, Wisconsin: II. Effects of an extract derived from cormorant eggs on the chicken embryo
White Leghorn chicken (Gallus domesticus) eggs were injected prior to incubation with one of four concentrations (0.001, 0.01, 0.1, and 1.0 egg-equivalent) of an extract derived from 1,000 double-crested cormorant (Phalacrocorax auritus) eggs collected at Spider Island adjacent to Green Bay in Lake Michigan. One egg-equivalent corresponded to the concentration of contaminants present in...
Authors
D.C. Powell, R.J. Aulerich, J.C. Meadows, D. E. Tillitt, K. L. Stromborg, T.J. Kubiak, J. P. Giesy, S.J. Bursian