Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 3 of 3
Full-Text Articles in Entire DC Network
Habitat Utilization Of Mammals In A Man-Made Forest In The Sandhills Region Of Nebraska., Richard W. Manning
Habitat Utilization Of Mammals In A Man-Made Forest In The Sandhills Region Of Nebraska., Richard W. Manning
Student Work
The Sandhills Region of Nebraska is located in the central and northern portion of Nebraska. Within this region is the Bessey Division of the Nebraska National Forest. The Bessey Division encompasses 36,560 ha of which approximately 8,900 ha are forested; all forested lands are man-planted. Forest types include monocultures of three species; ponderosa pine (Pinus ponderosa), jack pine (Pinus banksiana), and Eastern red cedar (Juniperus virginiana). This represents the largest man-made Forest in the National Forest System of the United States. The remaining 27,660 ha are of native grasses. Also a narrow strip of riparian habitat runs along the northern …
Reproduction And Morphology Of Two Annual Taxa Of Sporobolus (Poaceae)., Elvera W. Skokan
Reproduction And Morphology Of Two Annual Taxa Of Sporobolus (Poaceae)., Elvera W. Skokan
Student Work
Morphology and reproduction were studied in two annual taxa of Sporobolus (Poaceae) at eight locations in eastern Nebraska. Estimated percent cleistogamy was 93.2% in S. neglectus and 83.8% in S. vaginiflorus in specimens collected throughout the 1982 growing season. Anthers of cleistogamous florets were smaller in size and lower in number than anthers of chasmogamous florets. Pollen-ovule ratios were significantly lower in cleistogamous than in chasmogamous florets and cleistogamous florets showed precocious development. Agamospermous reproduction may also be present in the taxa. The lack of intermediate forms between the two taxa in the locations studied may be attributable to the …
Vegetational Changes Under Isolated Juniperus Virginiana In An Eastern Nebraska Bluestem Prairie., Janet L. Gehring
Vegetational Changes Under Isolated Juniperus Virginiana In An Eastern Nebraska Bluestem Prairie., Janet L. Gehring
Student Work
Changes in species composition of a Bluestem prairie were evaluated under isolated, 10-22 year old Juniperus virginiana (Eastern Red Cedar) in eastern Nebraska. Percent canopy cover was measured in full-canopy, canopy-edge, and open-canopy plots which were located along transects oriented to the cardinal compass directions. A total of 53 species were recorded. Andropogon scoparius and A. gerardii dominated open-canopy and canopy-edge plots; Poa pratensis and A. scoparius dominated full-canopy plots. Canopy cover of most prairie species decreased under full canopy but Poa pratensis and Carex spp. increased. There was a positive correlation between tree size and both the decrease of …