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University of Minnesota Morris Digital Well

Journal

1979

Articles 1 - 10 of 10

Full-Text Articles in Life Sciences

Planting Trees-Why Rather Than How, Angelo Cohn Jan 1979

Planting Trees-Why Rather Than How, Angelo Cohn

Journal of the Minnesota Academy of Science

Three evergreen plantings over 25 years in a private woodland are described and evaluated in terms of reforestation, economics and personal satisfaction. Credit is given to government foresters and support from the Minnesota Department of Natural Resources (DN\R) and the federal Forest Incentives Program (FIP). Changes in site preparation methods, selection of species and planting procedures are discussed as outcomes of research and field experience. Cost-benefits are assigned principally to human values reflected in family learning and enhanced appreciation of the ecosystem of rural Minnesota.

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Distribution And Ecology Of Orconectes Iowaensis Fitzpatrick And Orconectes Rusticus (Girard) In Minnesota, Gary S. Phillips, Larry A. Reis Jan 1979

Distribution And Ecology Of Orconectes Iowaensis Fitzpatrick And Orconectes Rusticus (Girard) In Minnesota, Gary S. Phillips, Larry A. Reis

Journal of the Minnesota Academy of Science

During 1979, a field study was conducted to determine the species of crayfish present in southern Minnesota. Specimens of Orconectes iowaensis Fitzpatrick, Orconectes rusticus (Girard), and Orconectes virilis (Hagen) were collected. These represent new state records for O. iowaensis and O. rusticus. O. iowaensis appears restricted to the Root River drainage system in extreme southeastern Minnesota. O. rusticus was found in the West Fork of the Des Moines River in southwestern Minnesota and the Cedar River drainage system in south central Minnesota. Notes on the ecology of these species are included.

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Photoperiodicity In Adsuki Beans, A Preliminary Report, Thomas W. Clapp, Vivian L. Johnson Jan 1979

Photoperiodicity In Adsuki Beans, A Preliminary Report, Thomas W. Clapp, Vivian L. Johnson

Journal of the Minnesota Academy of Science

One variety, Adsuki beans (Phaseolus angularis or Vigna angularis) has been demonstrated to be photoperiodically sensitive, flowering within fifty days or in the three to five internode stage when grown under "short day" conditions and remaining vegetative for at least 70 days or past the 12 internode stage under "long day" conditions.

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Macroinvertebrate Populations In The Upper Mississippi River, David R. Mcconville Jan 1979

Macroinvertebrate Populations In The Upper Mississippi River, David R. Mcconville

Journal of the Minnesota Academy of Science

The macroinvertebrate community of the Mississippi River near Monticell, Minnesota, was examined for 22 months. Quantitative bottom fauna information was obtained by use of concrete block artificial substrate sampling units. Representative organisms were obtained from seven (7) orders, 15 families and 35 genera of benthic macroinvertebrates. All taxa collected displayed definite seasonal trends. The Orders Trichoptera, Diptera, and Ephemeroptera were the most abundant groups collected, Trichoptera (Hydropsyche and Cheumatopsyche) were the dominant members of the benthic population in both numbers and biomass. Midges and blackflies were the dominant Diptera. Pseudocloeon, Stenonema, and Ephemerella were the most frequently collected mayflies.

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Lichen Deterioration About A Coal-Fired Steam Electric Generating Plant, Elmer L. Schmidt, R. J. Zeyen Jan 1979

Lichen Deterioration About A Coal-Fired Steam Electric Generating Plant, Elmer L. Schmidt, R. J. Zeyen

Journal of the Minnesota Academy of Science

A survey of three common epiphytic species of foliose lichens was conducted about a coal-fired steam electric station in North-central Minnesota during the summer of 1977 to assess general lichen health on a gradient basis from a point-source of air pollution. Health, as judged by abnormal form and color, of nearly 3,500 lichen specimens was recorded in 35 vegetation survey plots from a total of 291 trees. Lichen discoloration and degeneration decreased with increased distance from the power plant, and little deterioration was observed beyond 3 miles. Within the plant vicinity, lichen damage was noted on tree boles facing the …

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Nesting And Brood Rearing Habitat Of The Upland Sandpiper, John C. Dorio, Alfred H. Grewe Jan 1979

Nesting And Brood Rearing Habitat Of The Upland Sandpiper, John C. Dorio, Alfred H. Grewe

Journal of the Minnesota Academy of Science

The upland sandpiper population breeding in Morrison county in central Minnesota was studied in 1975 and 1976. Nests were found in old fields (73 percent), pastures (20 percent), and in a sedge-grass meadow (7 percent). Most nests were discovered in vegetation 22.5 to 35.0 cm tall and on the average were 13.2 m. from an aspen or willow edge. Seven grasses and 23 forbs made up the plant species composition at 14 nest-sites. Brood rearing areas were old fields and over-grazed pastures. Upland sandpipers prefer to feed in vegetation that does not exceed 10 cm.

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Lake Itasca State Park Myxomycetes: An Annotated Checklist, M. E. Palm, E. L. Stewart, E. F. Haskins Jan 1979

Lake Itasca State Park Myxomycetes: An Annotated Checklist, M. E. Palm, E. L. Stewart, E. F. Haskins

Journal of the Minnesota Academy of Science

A lack of published information regarding Minnesota Myxomycetes prompted attempts to document species from Lake Itasca State Park in Clearwater county, in the northwest part of the state. Seventy-five species are herein recorded from 341 collections made during the years 1959, 1971,and 1975-78.

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In Vitro Experiments On Totipotency Of Dacus Carota, Karl L. Ruser Jan 1979

In Vitro Experiments On Totipotency Of Dacus Carota, Karl L. Ruser

Journal of the Minnesota Academy of Science

The intent of this project was to induce the totipotency of carrot cells in tissue culture. The information gathered would be applied to work with woody plants. Differentiated cells removed from the root were cultured in vitro using a modified White's medium. Callus was initiated and successfully sub cultured. Roots and the production of chlorophyll have been initiated in the cultures. Because some specialized equipment and facilities for tissue culture were not available at the beginning of the project, it took considerable time to gather and improvise them. A roller tube culture mixer was constructed, using the mechanism from a …

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Blue-Green Algal (Cyanophyta) Toxins, Charles P. Mason Jan 1979

Blue-Green Algal (Cyanophyta) Toxins, Charles P. Mason

Journal of the Minnesota Academy of Science

In the past toxin production by blue-green algae has been demonstrated by feeding large quantities of algae to vertebrates and observing symptoms leading to animal death. It was the purpose of this investigation to develop a more convenient way to test for the presence of an alga toxin using instead of vertebrates, other algae and those organisms with which it lives and competes in fresh water habitats. Using axenic algae cultures and three different agar media MBL, DAA and NA, the latter to check for bacterial contamination, algae were streaked on the agar surface in petri dishes to form a …

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Shovelnose Sturgeon (Scaphirhynchus Platorhynchus) In The Minnesota River, Paul Durkee, Brian Paulson, Robert Bellig Jan 1979

Shovelnose Sturgeon (Scaphirhynchus Platorhynchus) In The Minnesota River, Paul Durkee, Brian Paulson, Robert Bellig

Journal of the Minnesota Academy of Science

The shovelnose sturgeon, Scaphirhyncus platorhyncus, according to Eddy and Underhill (1974) has not been reported from the Minnesota River for a number of years. Recently, Wilcox et. al. (1978) reported a single adult taken in 1974, and two others in 1976. Our survey of the fishes in the Minnesota River showed a substantial number of shovelnose sturgeon, at least in certain locations. Twenty specimens were taken in 42 gill net days. Other data obtained included food habits and age-length relationships. Food habits were determined through volumetric analysis of stomach contents, and ages were obtained by sectioning the marginal pectoral fin …

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