Life Sciences Commons^™

Distribution And Structure Of The Forests Of Eastern Nebraska, John M. Aikman

Papers from the University Studies series (University of Nebraska)

This paper is a study of the distribution and structure of the forests of extreme eastern Nebraska. The Missouri river, which forms the eastern boundary of the state, has so greatly modified the climate, that along its course an arm of the deciduous forest extends far into the grassland. Most of the trees and shrubs composing this forest are at the extreme western limit of their range. The range, grouping, and behavior of the several dominants and subdominants, under the environmental conditions imposed upon them, and the transition of forest to grassland are the subjects of this investigation. This region …

Further Studies In The Ecotone Between Prairie And Woodland, R. J. Pool, J. E. Weaver, F. C. Jean

Papers from the University Studies series (University of Nebraska)

A series of intensive investigations of the ecological features of the tension zone between prairie and woodland in the Mississippi valley was begun by Weaver and Thiel in 1915. These studies were continued for two seasons in Minnesota and were also extended to the prairies of eastern Nebraska in 1916. These investigations represent the first attempt to attack the prairie-forest problem on a comprehensive scale by means of the quantitative methods of modern ecology. Some of the results secured from these studies have been published as the first paper of a series planned to deal with critical investigations in the …

A Study Of The Vegetation Of Southeastern Washington And Adjacent Idaho, J. E. Weaver

Papers from the University Studies series (University of Nebraska)

Noone at all botanically inclined can travel through southeastern Washington without being impressed with the marked changes which a distance of only a few miles may show in the vegetation. Traveling eastward from a point fifty miles west of the Idaho state line, one passes from a region of scab-land sagebrush through one of rolling hills covered with bunch-grasses. Upon steadily ascending the great Columbia Plateau, the 'bunchgrasses give way to well developed prairies, and these in turn, near the Idaho line, to forests of yellow pine, Douglas fir, white fir, tamarack, and cedar. Or starting from Spokane in the …

Ecological Investigations Upon The Germination And Early Growth Of Forest Trees, Richard H. Boerker

Papers from the University Studies series (University of Nebraska)

Briefly stated the purpose of the present investigation is to inquire into the effect of the more important habitat and seed factors upon the germination and early development of certain American forest trees in control cultures in the greenhouse for the purpose of obtaining data that may be used in the ~ilvicultural management of these species.

Prefatory Note 1 / Preliminary Considerations 7 / Historical 7 / Classification and Resume of Habitat Factors 11 / The Germination Process 15 / Method of Attacking Problem at Hand 19/ Methods and Apparatus Used 2 1/ The Control of Habitat Factors 24 / …

Plant Migration Studies: Forest Trees, Charles E. Bessey

Papers from the University Studies series (University of Nebraska)

It is a familiar fact that new species appear from time to time among the native plants of a region. Such newcomers turn out on examination to be new only in the sense that they have not previously lived in the region, and in every instance these new plants are found to have come from other regions where they had existed for a longer or shorter period of time. In some cases the · new species remain for a time and then disappear, or at least become inconspicuous, but more commonly they crowd in among the former plants and become …