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Full-Text Articles in Life Sciences
Effect Of Human Disturbance On Small Mammal Communities In Itasca State Park, Minnesota, Nancy L. Staus, Kathleen Conforti, Leslie N. Clapper, Jennifer A. Longhenry, C. C. Schoenbauer, Michael S. Rentz, John R. Tester
Effect Of Human Disturbance On Small Mammal Communities In Itasca State Park, Minnesota, Nancy L. Staus, Kathleen Conforti, Leslie N. Clapper, Jennifer A. Longhenry, C. C. Schoenbauer, Michael S. Rentz, John R. Tester
Journal of the Minnesota Academy of Science
We determined effects of different levels of human disturbance on small mammal richness and relative abundance from live-trapping data obtained in Itasca State Park in northwestern Minnesota. We developed a quantitative measure of human disturbance based on disturbance units and trapped small mammals on three study sites, each reflecting a different level of disturbance. Our data revealed that small mammal diversity decreased with increasing human disturbance. Amount of ground cover and litter depth also appeared to be important in explaining differences in the demographic patterns of small mammals among sites.
Additions And Confirmations To The Algal Flora Of Itasca State Park Ii. Diatoms From Chambers Creek, Mark B. Edlund
Additions And Confirmations To The Algal Flora Of Itasca State Park Ii. Diatoms From Chambers Creek, Mark B. Edlund
Journal of the Minnesota Academy of Science
A survey of the summer diatom flora of Chambers Creek, Clearwater County, Minnesota, is presented, continuing an inventory of the algal flora from Itasca State Park. Chambers Creek is a short, second-order, hardwater stream with great habitat diversity and a rich algal flora. One hundred and twenty-six diatom taxa representing 45 genera are reported, with many new reports from the park. Recent taxonomic revisions have been incorporated into this study and seven new nomenclatural combinations proposed.
The Itasca State Park Algal Culture Collection At Loras College, David B. Czarnecki, M. Jon Ross
The Itasca State Park Algal Culture Collection At Loras College, David B. Czarnecki, M. Jon Ross
Journal of the Minnesota Academy of Science
A list of over 125 algal cultures originating from Lake Itasca State Park is presented. These cultures, permanently housed at Loras College, Dubuque, Ia., include 115 taxa representing 68 genera from six algal Divisions. Approximately one-third of the taxa are desmids.
Additions And Confirmations To The Algal Flora Of Itasca State Park I. Desmids And Diatoms From North Deming Pond, Huan Ngo, Gerald W. Prescott, David B. Czarnecki
Additions And Confirmations To The Algal Flora Of Itasca State Park I. Desmids And Diatoms From North Deming Pond, Huan Ngo, Gerald W. Prescott, David B. Czarnecki
Journal of the Minnesota Academy of Science
The summer desmid and diatom flora of North Deming Pond in lake Itasca State Park is presented. One hundred sixty desmid taxa representing 23 genera are recorded. Of these, 15 taxa appear to be park records and 82 are apparently Minnesota records. The desmid genera, Closterium, Cosmarium, Euastrum, Micrasterias, Pleurotaenium, and Staurastrum display the most taxa. The 136 diatom taxa recorded represent 27 genera. More than half of the taxa are assignable to the genera Eunotia, Navicula, Neidium, and Pinnularia. Given the brief and cursory nature of this study, the taxomic representation of these algae indicates high species richness and …
Earthworms Of Two Minnesota Forest Areas, R. O. Morgenweck, W. H. Marshall
Earthworms Of Two Minnesota Forest Areas, R. O. Morgenweck, W. H. Marshall
Journal of the Minnesota Academy of Science
This paper reviews Lumbricidae records for Minnesota and reports on two collections in northern areas of the state. The first site, Itasca State Park, lies to the northwest with "Maple-basswood representative of climax forest to the south and southeast" and " Spruce-fir stands representative of climax forest to the north and northeast" (Buell and Gordon 1945). The Cloquet Forestry Center (CFC); site of the other collection, is near Duluth, 150 miles to the east, where the forests are largely coniferous. Here seven forest types, as described by Wenstrom (1973), and known to be used by American woodcock (Philohela minor), were …
Wood-Rotting Basidiomycetes--Itasca State Park Annotated List, Robert L. Gilbertson, Frances F. Lombard
Wood-Rotting Basidiomycetes--Itasca State Park Annotated List, Robert L. Gilbertson, Frances F. Lombard
Journal of the Minnesota Academy of Science
This study reports 216 species of wood-rotting Basidiomycetes from Lake Itasca State Park in Minnesota. Of these, two species, Gloeocystidiellum heimii Boid. and Phanerochaete cumulodentata (Nikol) Parm., are reported for the first time from North America.
Pine Reproduction In Itasca State Park: Analysis In Moisture-Nutrient Coordinates, Vilis Kurmis, Henry L. Hansen
Pine Reproduction In Itasca State Park: Analysis In Moisture-Nutrient Coordinates, Vilis Kurmis, Henry L. Hansen
Journal of the Minnesota Academy of Science
Natural pine reproduction was studied in 36 forest communities representing the range of ecological variability of the upland forest in Itasca Park, Minnesota. The method of synecological coordinates was used to evaluate reproduction in relation to stand and site conditions. In the absence of fire, predominantly medium to nutrient-rich forest soils favor the growth of herbs, shrubs, and hardwoods under the open canopies of pine and aspen stands. There are very few red pine (Pinus resinosa Ait.) and jack pine (Pinus banksiana Lamb.) seedlings under these conditions, and growth of white pine (Pinus strobus L.) seedlings is severely restricted.
Aquatic Stages Of Stratiomys Normula Unilimbata Loew. (Diptera: Stratiomyiidae), Blanchard O. Krogstad
Aquatic Stages Of Stratiomys Normula Unilimbata Loew. (Diptera: Stratiomyiidae), Blanchard O. Krogstad
Journal of the Minnesota Academy of Science
A study of the life cycle and behavior of the Stratiomys normula unilimbata Loew. in a pond in Itasca State Pork, Minnesota, showed that larvae overwinter in the bottom of the shallow pond and emerge in July. Some of the mortality factors are suggested, including the ichneumonid parasite, Ceratophygadeuon sp., reared from the larva and drowning of the pupa following a sudden increase in water level. Drastic reduction of the water level would also result in larval mortality.
Poriferan Fauna Of A Minnesota Pond, Louise A. Rollins
Poriferan Fauna Of A Minnesota Pond, Louise A. Rollins
Journal of the Minnesota Academy of Science
An examination of sponges in Lund's Pond, within Itasca State Park, Clearwater County, Minnesota, was conducted in the summer of 1970. Five species, representing four genera, were identified. Some physical characteristics and water chemistry of the pond also were examined.
Siphonaptera From Itasca State Park Region, Allen H. Benton, Omer R. Larson, Bradley A. Ven Huizen
Siphonaptera From Itasca State Park Region, Allen H. Benton, Omer R. Larson, Bradley A. Ven Huizen
Journal of the Minnesota Academy of Science
No abstract provided.
Some Helminths Of Itasca Park Fishes, Omer R. Larson
Some Helminths Of Itasca Park Fishes, Omer R. Larson
Journal of the Minnesota Academy of Science
A helminth survey was conducted'. on 12 species of fish taken from the waters of Itasca State Park. An abundant and varied helminth fauna was found, with 3 l parasitic forms identified to genus or species. By taxonomic groups these included, 20 trematodes, 5 cestodes, 2 acanthocephalans, and 4 nematodes. Every fish examined was parasitized, but yellow perch and rockbass possessed the greatest variety of helminths. Based on the results of this survey, several aspects of parasite life cycles, geographic distribution, and hast specificity are discussed.
Annual And Season Weight Changes In A Thirteen-Lined Ground Squirrel Population, Itasca State Park, Minnesota, Bonnie M. Hohn, William H. Marshall
Annual And Season Weight Changes In A Thirteen-Lined Ground Squirrel Population, Itasca State Park, Minnesota, Bonnie M. Hohn, William H. Marshall
Journal of the Minnesota Academy of Science
The ecology of the thirteen-lined ground squirrel (Citellus tridecemlineotus) has been under investigation since 1954 on the grounds of the University of Minnesota Forestry and Biological Station located in Itasca State Park, Minnesota. Over the 11-year period, data have been collected on individuals of this small, relatively isolated, population. Studies of population dynamics, movements, activity patterns, and weights have been stressed, chiefly during the three summer months of June, July, and August. In 1964, the senior author carried out field work for the entire season from April 30 to September 14.
An Analysis Of Selected Red Pine Stands In Itasca State Park, Minnesota, Roy K. Blowers
An Analysis Of Selected Red Pine Stands In Itasca State Park, Minnesota, Roy K. Blowers
Journal of the Minnesota Academy of Science
No abstract provided.
An Ecological Study Of The Upland Conifers Of Itasca State Park, Vernance Beste
An Ecological Study Of The Upland Conifers Of Itasca State Park, Vernance Beste
Journal of the Minnesota Academy of Science
No abstract provided.
A Preliminary Survey Of Insects Visiting Goldenrod In Itasca Park, Alice Endicott
A Preliminary Survey Of Insects Visiting Goldenrod In Itasca Park, Alice Endicott
Journal of the Minnesota Academy of Science
No abstract provided.
The Search For Natural History Areas In Minnesota, A. N. Wilcox, W. J. Breckenridge, R. L. Donovan, T. B. Magath, H. E. Stork, Gustav Swanson
The Search For Natural History Areas In Minnesota, A. N. Wilcox, W. J. Breckenridge, R. L. Donovan, T. B. Magath, H. E. Stork, Gustav Swanson
Journal of the Minnesota Academy of Science
No abstract provided.