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Full-Text Articles in Physical Sciences and Mathematics
Small Mammal Responses To Roadside Habitat Management In South Central Minnesota, Jeffrey W. Grimm, Richard H. Yahner
Small Mammal Responses To Roadside Habitat Management In South Central Minnesota, Jeffrey W. Grimm, Richard H. Yahner
Journal of the Minnesota Academy of Science
Responses of small mammals to management of roadsides in south central Minnesota were examined from August-October in 1980 and 1981. The Minnesota Department of Natural Resources established and maintained vegetation along portions of these roadsides by planting Bromus inermis and Medicago sativa as nesting cover for ring-necked pheasants (Phasianus colchicus) and with infrequent mowing. Landowners or state and county transportation departments maintained other roadside areas by frequent mowing of native vegetation. Mowing of roadsides had a negative effect on abundance of Blarina brevicauda, Peromyscus leucopus, Microtus pennsylvanicus, and Mustela erminea during both summer and autumn and on abundance of Peromyscus …
Seasonal Variations In Water Quality Parameters Of The Mississippi River Near St. Cloud, Mn, Stephen B. Ellingson, Alfred J. Hopwood
Seasonal Variations In Water Quality Parameters Of The Mississippi River Near St. Cloud, Mn, Stephen B. Ellingson, Alfred J. Hopwood
Journal of the Minnesota Academy of Science
ABSTRACT - Water quality parameters were monitored in the Mississippi River and three tributaries (Harris Channel, Watab Creek, and Sauk River) from July 1980 to April 1981. Results were correlated with water temperature and discharge to assess seasonal changes. Effects of tributary inflow on the river were determined. Planktonic carbon was estimated with the firefly luciferin-luciferase system which measures adenosine triphosphate extracted from viable cells. Particulate organic matter, planktonic carbon, and percentage viable carbon were correlated with temperature (p ~ 0.6) while nitrate plus nitrite was inversely correlated with temperature and discharge. Only the Sauk River affected the water quality …