Publication Date

1962

Document Type

Dissertation/Thesis

First Advisor

Mathers, Carrol K.||Grosklags, James H.||Terwilliger, George L.

Degree Name

M.S. (Master of Science)

Department

Department of Biological Sciences

LCSH

Club mosses||Ecology--Illinois

Abstract

The occurrence for the first time in the state of Illinois of lycopodium obscurum (L.) appears to be direct­ly related to the geological and climatological conditions found in the Castle Rock area. Rock River Valley, Illinois. There also appears to be a correlation between the occurrence in Illinois and three recent spontaneous occurrences in the state of Ohio. The correlating factor is that all of the occurrences are located in a habitat structure dominated by either man-made or naturally disturbed geological features. In the Castle Rock area of Rock River Valley the geo­logical disturbance factor is that of slumping. The slump­ing of the sandy detrital soil coupled with a high water table has produced a microhabitat with a Dfb climate. As to the origin of the plants in the microhabitat one can make the assumption, based on the research of Cobb in Colorado, that the occurrence is the result of high level wind spore dissemination. There also is the possibility that the occurrence may be a pleistocine relict or, perhaps, the work of man.

Comments

Includes bibliographical references.||Includes illustrations and maps.

Extent

v, 59 pages

Language

eng

Publisher

Northern Illinois University

Rights Statement

In Copyright

Rights Statement 2

NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.

Media Type

Text

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