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Full-Text Articles in Life Sciences
New Rules, New Technologies, And The Shape Of Minnesota Farming, Steven J. Taff
New Rules, New Technologies, And The Shape Of Minnesota Farming, Steven J. Taff
Journal of the Minnesota Academy of Science
The future development of Minnesota agriculture will be strongly influenced by new technologies and government policies that will alter prices for farm inputs and outputs. While some farm operations will fail under most expected price regimes, a loss of farmers will probably not have a significant impact on overall farm production. However, the new technologies and government policies could shift Minnesota farming into either a more intensive (less land, higher yield) or more extensive (more land, lower yield) mode of operation. A shift either way will have important implications for Minnesotans. Ownership and residence patterns, ground water quality, habitat and …
Global Agricultural Trade Negotiations And Their Potential Impact On Minnesota, Mark Ritchie
Global Agricultural Trade Negotiations And Their Potential Impact On Minnesota, Mark Ritchie
Journal of the Minnesota Academy of Science
The two main factors determining the financial well-being of our family farmers, market prices and government payments, are primarily established by Congress through federal legislation, commonly called the Farm Bill. Although these two factors are likely to remain the main economic ingredients in Minnesota's farm economy for the foreseeable future, the political control over these issues appears to be shifting out of the hands of Congress and into the hands of our international trade negotiators. For the very first time, all price support, income subsidy, and supply management programs are on the table for alteration or elimination in this new …
Survey Of The Endogonaceae In Minnesota With Synoptic Keys To Genera And Species, F. L. Pfleger, Elwin L. Stewart
Survey Of The Endogonaceae In Minnesota With Synoptic Keys To Genera And Species, F. L. Pfleger, Elwin L. Stewart
Journal of the Minnesota Academy of Science
Sixteen species in the Endogonaceae (Zygomycotina) were identified from 22 different plant species from a native prairie, an intensively cultivated vegetable field, a reclaimed iron ore tailings basin, an undisturbed site adjacent to the iron ore tailings basin, and from a Pinus resinosa plantation. Seven species of Endogonaceae identified in this study are new records for Minnesota. Synoptic keys to genera and species are presented.
The Distribution Of Minnesota Fishes And Late Pleistocene Glaciation, James C. Underhill
The Distribution Of Minnesota Fishes And Late Pleistocene Glaciation, James C. Underhill
Journal of the Minnesota Academy of Science
No abstract provided.
Fisheries And Environmental Research By The Minnesota Sea Grant College Program, Donald C. Mcnaught
Fisheries And Environmental Research By The Minnesota Sea Grant College Program, Donald C. Mcnaught
Journal of the Minnesota Academy of Science
ABSTRACT-Minnesota's Sea Grant College Program has funded research and outreach activities since 1977. Research results combined with public education setve the citizens, government, and businesses of the state. Research on commercial and sport fisheries, aquaculture, and environmental contamination is highlighted here. This article shows Sea Grant's contributions to understanding the Lake Superior ecosystem, including its chemical, biological, and human aspects.
Mercury In Fish From Northeastern Minnesota Lakes: Historical Trends, Environmental Correlates, And Potential Sources, Edward B. Swain, Daniel D. Helwig
Mercury In Fish From Northeastern Minnesota Lakes: Historical Trends, Environmental Correlates, And Potential Sources, Edward B. Swain, Daniel D. Helwig
Journal of the Minnesota Academy of Science
ABSTRACT-High mercury concentrations in fish of some Minnesota lakes and rivers were first noted in 1971. Major anthropogenic sources of mercury to Minnesota rivers generally have been identified and controlled, but it has been difficult to identify mercury sources to remote northeastern Minnesota lakes containing fish with elevated mercury levels. Analysis of sediments from these lakes suggests that mercury deposition has increased by a factor of about 3.5 since white settlement in the state. Because the increase is spatially constant across northeastern Minnesota, atmospheric pollution appears to be responsible for the increase. Given that fish mercury varies considerably among lakes, …
Hexagenia Mayflies: Biological Monitors Of Water Quality In The Upper Mississippi River, Calvin R. Fremling
Hexagenia Mayflies: Biological Monitors Of Water Quality In The Upper Mississippi River, Calvin R. Fremling
Journal of the Minnesota Academy of Science
ABSTRACT-Analysis of Hexageniamayfiy distribution patterns has proven to be a simple, inexpensive method of monitoring water quality in the Upper Mississippi River. Burrowing Hexagenia nymphs live at the mudwater interface intimately associated with organically enriched sediments that have a strong affinity for contaminants. By their presence or absence in silted habitats, they assess the synergistic effects of hypoxia, toxins, and other stresses throughout the year. Adults are large and easily collected, providing inexpensive water quality monitoring on a river so large that comprehensive chemical, physical, and biological analyses are not logistically feasible or affordable. Pollution abatement in metropolitan Minneapolis-St. Paul …
Fishery Resource Of The Upper Mississippi River And Relationship To Stream Discharge, William A. Swenson, G. David Hebberling, Daniel J. Orr, Timothy D. Simonson
Fishery Resource Of The Upper Mississippi River And Relationship To Stream Discharge, William A. Swenson, G. David Hebberling, Daniel J. Orr, Timothy D. Simonson
Journal of the Minnesota Academy of Science
ABSTRACT-Fish population data collected through the Northern States Power Company monitoring program near its plants at Monticello and Becker, Minnesota were analyzed to describe species diversity, changes in recreational fishing, fishing success, and the influence of stream discharge on smallmouth bass year-class success and abundance. The work is part of a more extensive effort to develop a model applicable in managing the upper Mississippi River to meet the growing needs of recreation, agriculture, communities, and industry. Analysis of these data shows 48 species to be present and that smallmouth bass, Micropterus dolomieu~ is the most important game species in the …