Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16740
Using endoscopy to diagnose hatching problems in cranes Using endoscopy to diagnose hatching problems in cranes
No abstract available.
Authors
Glenn H. Olsen
Species, habitat alterations affect bee pollinators in U.S. northeast Species, habitat alterations affect bee pollinators in U.S. northeast
No abstract available.
Authors
H. S. Ginsberg
Marsh birds and the North American Breeding Bird Survey: judging the value of a landscape level survey for habitat specialist species with low detection rates Marsh birds and the North American Breeding Bird Survey: judging the value of a landscape level survey for habitat specialist species with low detection rates
The North American Breeding Bird Survey was started in 1966, and provides information on population change for >400 species of birds. it covers the continental United States, Canada, and Alaska, and is conducted once each year, in June, by volunteer observers. A 39.4 kIn roadside survey route is driven starting 30 min before sunrise, and a 3 min point count is conducted at each of 50...
Authors
J.R. Sauer
Successful experimental reproduction of early mortality syndrome in Lake trout: Research task report on early mortality syndrome workshop Successful experimental reproduction of early mortality syndrome in Lake trout: Research task report on early mortality syndrome workshop
No abstract available at this time
Authors
D. C. Honeyfield
Responsiveness of gill Na+/K+-ATPase to cortisol is related to gill corticosteroid receptor concentrations in juvenile rainbow trout Responsiveness of gill Na+/K+-ATPase to cortisol is related to gill corticosteroid receptor concentrations in juvenile rainbow trout
A positive relationship between receptor concentration and tissue responsiveness is an often-assumed and rarely tested principle in endocrinology. In salmonids, seasonal changes in levels of plasma cortisol and gill corticosteroid receptors (CRs) during the spring indicate a potential role for this hormone in the parr–smolt transformation. It is not known whether these seasonal changes...
Authors
J. M. Shrimpton, S. D. McCormick
Biogenic silica from the BDP93 drill site and adjacent areas of the Selenga Delta, Lake Baikal, Siberia Biogenic silica from the BDP93 drill site and adjacent areas of the Selenga Delta, Lake Baikal, Siberia
Biogenic silica contents of sediments on the lower Selenga Delta and Buguldeika saddle in Lake Baikal show distinct fluctuations that reflect changes in diatom productivity, and ultimately, climate. The pattern of the upper 50 m of the section, dating from about 334 ka, is similar to that of the marine oxygen-isotope record, increasingly so as the younger sediments become progressively...
Authors
Steven M. Colman, John A. Peck, Josephine Hatton, Eugene B. Karabanov, John W. King
Formation of natural gas hydrates in marine sediments 1. Conceptual model of gas hydrate growth conditioned by host sediment properties Formation of natural gas hydrates in marine sediments 1. Conceptual model of gas hydrate growth conditioned by host sediment properties
The stability of submarine gas hydrates is largely dictated by pressure and temperature, gas composition, and pore water salinity. However, the physical properties and surface chemistry of deep marine sediments may also affect the thermodynamic state, growth kinetics, spatial distributions, and growth forms of clathrates. Our conceptual model presumes that gas hydrate behaves in a way...
Authors
M. B. Clennell, M. Hovland, J.S. Booth, P. Henry, W.J. Winters
Dynamic replacement and loss of soil carbon on eroding cropland Dynamic replacement and loss of soil carbon on eroding cropland
Links between erosion/sedimentation history and soil carbon cycling were examined in a highly erosive setting in Mississippi loess soils. We sampled soils on (relatively) undisturbed and cropped hillslopes and measured C, N, 14C, and CO2 flux to characterize carbon storage and dynamics and to parameterize Century and spreadsheet 14C models for different erosion and tillage histories. For...
Authors
J.W. Harden, J. M. Sharpe, W.J. Parton, D.S. Ojima, T. L. Fries, Thomas G. Huntington, S. M. Dabney
Review of a natural thiamine deficiency causing reproductive failure in feral salmonid species of the Great Lakes Review of a natural thiamine deficiency causing reproductive failure in feral salmonid species of the Great Lakes
No abstract available at this time
Authors
D. C. Honeyfield, D. E. Tillitt, S.B. Brown, J.D. Fitzsimons
Characterizing backcountry camping impacts in Great Smoky Mountains National Park Characterizing backcountry camping impacts in Great Smoky Mountains National Park
This investigates resource impacts on backcounty campsites in the Great Smoky Mountains National Park, USA. Study objectives were to enhance our understanding of camping impacts and to improve campsite impact assessment procedures by means of multivariate techniques. Three-hundred and eight campsites at designated backcountry campgrounds, and 69 additional unofficial campsites were...
Authors
Y.-F. Leung, J. L. Marion
Forest area and distribution in the Mississippi alluvial valley: Implications for breeding bird conservation Forest area and distribution in the Mississippi alluvial valley: Implications for breeding bird conservation
Knowing the current forest distribution and patch size characteristics is integral to the development of geographically defined, habitat-based conservation objectives for breeding birds. Towards this end, we classified 2.6 million ha of forest cover within the Mississippi Alluvial Valley using 1992 thematic mapper satellite imagery. Although historically this area, from southern Illinois...
Authors
D.J. Twedt, C.R. Loesch