Publications
Read publications and other informational products to learn more about USGS science occurring in the Mississippi Basin.
Filter Total Items: 5568
The reproductive biology of Magnolia Grandiflora The reproductive biology of Magnolia Grandiflora
No abstract available
Authors
Larry K. Allain, Michael S. Zavada, Douglas G. Matthews
Interaction of soil moisture and seedling shelters on water relations of baldcypress seedlings Interaction of soil moisture and seedling shelters on water relations of baldcypress seedlings
Stomata1 conductance, transpiration, and leaf water potential were measured during the 1996 growing season on baldcypress (Taxodium disfichum (L.) Rich.) seedlings. Seedlings were hand-planted from 1-O bareroot stock in mesic and permanently Rooded soil conditions. One-half of all seedlings were fitted with 122-cm tall polyethylene tree shelters, Seedlings were planted 1 year before the...
Authors
Ty Swirin, Hans Williams, Bob Keeland
Organochlorine residues and elemental contaminants in U.S. freshwater fish, 1976-1986: National Contaminant Biomonitoring Program Organochlorine residues and elemental contaminants in U.S. freshwater fish, 1976-1986: National Contaminant Biomonitoring Program
No abstract available.
Authors
C. J. Schmidt, James L. Zajicek, Thomas W. May, Deborah Cowman
Mississippi Basin Carbon Project; upland soil database for sites in Yazoo Basin, northern Mississippi Mississippi Basin Carbon Project; upland soil database for sites in Yazoo Basin, northern Mississippi
The conversion of land from its native state to an agricultural use commonly results in a significant loss of soil carbon (Mann, 1985; Davidson and Ackerman, 1993). Globally, this loss is estimated to account for as much as 1/3 of the net CO2 emissions for the period of 1850 to 1980 (Houghton et al, 1983). Roughly 20 to 40 percent of original soil carbon is estimated to be lost as CO2 as...
Authors
J.W. Harden, T. L. Fries, T.G. Huntington
Discovery of a second population of white-collared seedeaters, Sporophila torqueola (Passeriformes: emberizidae) along the Rio Grande of Texas Discovery of a second population of white-collared seedeaters, Sporophila torqueola (Passeriformes: emberizidae) along the Rio Grande of Texas
The range of the white-collared seedeater (Sporophila torqueola), a tropical grassland species, extends from Central America northward along both coasts of Mexico (Eitniear, 1997), including Tamaulipas and Nuevo Leon (Howell and Webb, 1995). White-collared seedeaters historically occurred commonly in extreme southern Texas (Oberholser, 1974; Rappole and Blacklock, 1994). However, since...
Authors
Marc C. Woodin, Mary K. Skoruppa, Gene W. Blacklock, Graham C. Hickman
Nutrients, pesticides, and pesticide metabolites discharged to the Mississippi River from Eastern Iowa Watersheds Nutrients, pesticides, and pesticide metabolites discharged to the Mississippi River from Eastern Iowa Watersheds
No abstract available.
Authors
D.J. Schnoebelen, Kent Becher
Comparison of water quality in four small watersheds containing animal feeding operations in Iowa Comparison of water quality in four small watersheds containing animal feeding operations in Iowa
No abstract available.
Authors
Kent Becher, Kimberlee K.B. Akers
Occurrence of acetochlor and acetochlor metabolites in alluvial aquifers in Iowa Occurrence of acetochlor and acetochlor metabolites in alluvial aquifers in Iowa
No abstract available.
Authors
Stephen J. Kalkhoff, Mark E. Savoca, Eric M. Sadorf, Dana W. Kolpin, Earl M. Thurman
Finding minimal concentrations of herbicides in ground water? Try looking for the degradates Finding minimal concentrations of herbicides in ground water? Try looking for the degradates
No abstract available.
Authors
D.W. Kolpin, E.M. Thurman, S. M. Linhart
Occurrence and distribution of chloroacetanilide and triazine pesticide metabolites in streams in eastern Iowa Occurrence and distribution of chloroacetanilide and triazine pesticide metabolites in streams in eastern Iowa
No abstract available.
Authors
Stephen J. Kalkhoff, E.M. Thurman
Winter ecology of the endangered golden-cheeked warbler Winter ecology of the endangered golden-cheeked warbler
We studied the ecology of the Golden-cheeked Warbler (Dendroica chrysoparia) during three winter seasons, 1995-1998, in Honduras, Guatemala, and Mexico. Individuals of this species occurred almost exclusively as members of mixed-species flocks, occupying sites with greater densities of encino oak and ground cover and fewer pines than random sites. Most foraging observations were recorded...
Authors
John H. Rappole, David I. King, Wylie C. Barrow