Publications
Read publications and other informational products to learn more about USGS science occurring in the Mississippi Basin.
Filter Total Items: 5589
Species frequency dynamics in an old-field succession: Effects of disturbance, fertilization and scale Species frequency dynamics in an old-field succession: Effects of disturbance, fertilization and scale
Question: Can patterns of species frequency in an old-field be explained within the context of a metapopulation model? Are the patterns observed related to time, spatial scale, disturbance, and nutrient availability?Location: Upland and lowland old-fields in Illinois, USA.Method: Species richness was recorded annually for seven years following plowing of an upland and lowland old-field...
Authors
David J. Gibson, Beth A. Middleton, K. Foster, Y. A. K. Honu, E. W. Hoyer, M. Mathis
Acute and chronic toxicity of lead in water and diet to the amphipod Hyalella azteca Acute and chronic toxicity of lead in water and diet to the amphipod Hyalella azteca
We evaluated the influence of waterborne and dietary lead (Pb) exposure on the acute and chronic toxicity of Pb to the amphipod Hyalella azteca. Test solutions were generated by a modified diluter with an extended (24‐h) equilibration period. Acute (96‐h) toxicity of Pb varied with water hardness in the range of 71 to 275 mg/L as CaCO3, despite similar dissolved Pb concentrations. Acute...
Authors
J.M. Besser, W. G. Brumbaugh, E.L. Brunson, C.G. Ingersoll
Improving removal-based estimates of abundance by sampling a population of spatially distinct subpopulations Improving removal-based estimates of abundance by sampling a population of spatially distinct subpopulations
A statistical modeling framework is described for estimating the abundances of spatially distinct subpopulations of animals surveyed using removal sampling. To illustrate this framework, hierarchical models are developed using the Poisson and negative-binomial distributions to model variation in abundance among subpopulations and using the beta distribution to model variation in capture
Authors
R.M. Dorazio, H.L. Jelks, F. Jordan
Developmental biology and ecology of the Kemp's ridley sea turtle. Lepidochelys kempii, in the eastern Gulf of Mexico Developmental biology and ecology of the Kemp's ridley sea turtle. Lepidochelys kempii, in the eastern Gulf of Mexico
Abstract not supplied at this time
Authors
J.R. Schmid, W.J. Barichivich
Spatiotemporal patterns of fish assemblage structure in a river impounded by low-head dams Spatiotemporal patterns of fish assemblage structure in a river impounded by low-head dams
We studied spatiotemporal patterns of fish assemblage structure in the Neosho River, Kansas, a system impounded by low-head dams. Spatial variation in the fish assemblage was related to the location of dams that created alternating lotic and lentic stream reaches with differing fish assemblages. At upstream sites close to dams, assemblages were characterized by species associated with...
Authors
David P. Gillette, Jeremy S. Tiemann, David R. Edds, Mark L. Wildhaber
Selenium impacts on razorback sucker, Colorado River, Colorado: II. Eggs Selenium impacts on razorback sucker, Colorado River, Colorado: II. Eggs
Effects on hatching and development of fertilized eggs in adult razorback sucker (Xyrauchen texanus) exposed to selenium in flooded bottomland sites near Grand Junction, Colorado, were determined. After 9 months exposure, fish were collected and induced to spawn and eggs collected for inorganic element analyses. A 9-day egg study was conducted with five spawns from Horsethief ponds, six...
Authors
S. J. Hamilton, K.M. Holley, K.J. Buhl, F.A. Bullard
Implications of global climatic change and energy cost and availability for the restoration of the Mississippi delta Implications of global climatic change and energy cost and availability for the restoration of the Mississippi delta
Over the past several thousand years, inputs from the Mississippi River formed the Mississippi delta, an area of about 25,000 km2. Over the past century, however, there has been a high loss of coastal wetlands of about 4800 km2. The main causes of this loss are the near complete isolation of the river from the delta, mostly due to the construction of flood control levees, and pervasive
Authors
John W. Day
Depicting coastal Louisiana land loss Depicting coastal Louisiana land loss
The Coastal Louisiana Land Loss map depicts historical (1932-2000) changes of land to water and water to land, as well as projected changes (2000-2050). Projections are based on the assumption of no future restoration.
Authors
Gregory J. Smith
Dilemma of the common species: Florida Box Turtles Dilemma of the common species: Florida Box Turtles
Abstract not supplied at this time
Authors
C.K. Dodd
Roads and Florida's herpetofauna: a review and mitigation case study Roads and Florida's herpetofauna: a review and mitigation case study
Abstract not supplied at this time
Authors
L. L. Smith, Kimberly G. Smith, W.J. Barichivich, C.K. Dodd, K. Sorensen
Occurrence of antibiotics in water from 13 fish hatcheries, 2001-2003 Occurrence of antibiotics in water from 13 fish hatcheries, 2001-2003
A 2-year study of extensive and intensive fish hatcheries was conducted to assess the general temporal occurrence of antibiotics in aquaculture. Antibiotics were detected in 15% of the water samples collected during the 2001-2002 collection period and in 31% of the samples during the 2003 collection period. Antibiotics were detected more frequently in samples from the intensive...
Authors
J.E. Dietze, E.A. Scribner, M. T. Meyer, D.W. Kolpin