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Articles 1 - 7 of 7
Full-Text Articles in Physical Sciences and Mathematics
Natural Science And Two Themes In Human History, Russell W. Maatman
Natural Science And Two Themes In Human History, Russell W. Maatman
Pro Rege
Reprinted by permission from Study Pamphlet No. 239, Institute for Reformational Studies, Potchefstroom University for Christian Higher Education, Potchefstroom, Republic of South Africa.
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 …
Production From The Management Of Burr Medic Pastures, C W. Thorn
Production From The Management Of Burr Medic Pastures, C W. Thorn
Journal of the Department of Agriculture, Western Australia, Series 4
No abstract provided.
Response Of Fish Communities To Habitat Alteration In A Small Ozark Stream, Danny J. Ebert, Stephen P. Filipek
Response Of Fish Communities To Habitat Alteration In A Small Ozark Stream, Danny J. Ebert, Stephen P. Filipek
Journal of the Arkansas Academy of Science
From 1984 to 1986, the Arkansas Highway and Transportation Department reconstructed and upgraded a portion of St. Hwy. 123 west of St. Hwy.7 at Pelsor, Arkansas. As a result of the construction, portions of Haw Creek, Johnson County, Arkansas, a third order stream in the Boston Mountains Ecoregion, were straightened and channelized. In reconstructing specific stream reaches, stream banks were riprapped and vegetated, gabions constructed and positioned, stream substrates and pool-riffle ratios altered. Instream and riparian habitat and fish biomass and diversity in altered reaches were radically altered. Channelized reaches became wide and shallow, lacking overstory cover and pools. Substrate …
Arkansas' Timber Resource: Yesterday, Today, And Tomorrow, Richard A. Kluender, R. L. Willett
Arkansas' Timber Resource: Yesterday, Today, And Tomorrow, Richard A. Kluender, R. L. Willett
Journal of the Arkansas Academy of Science
Demand for forest products continues to rise. Arkansas provides about 4% of the U.S. total forest production and about 12% of the south central region production. Questions exist about the ability of current forest resources to completely meet anticipated future demand. In 1985, the U.S. Forest Service and the Arkansas Timber Study Committee began to analyze the existing forest base to determine whether future demand could be met from the current forest, or if not, what management changes were needed to help meet future demand. In 1985, Arkansas forests covered approximately 48% of the total land area of the state. …
Plant Regeneration And The Control Of Dust On The South Common, Carnarvon, I W. Watson
Plant Regeneration And The Control Of Dust On The South Common, Carnarvon, I W. Watson
Journal of the Department of Agriculture, Western Australia, Series 4
No abstract provided.