Browsing by people, organizations and landmarks: year:
LONG-TERM GRAZING EFFECTS ON AN ILLINOIS SAND PRAIRIE AND COMPARISONS WITH UNGRAZED NATURAL AREAS (3.114671)
Date: 1992Creator: Bowles, Marlin L.
Type: Article
Description:This two-year study compares the effects of three treatments: open grazing, reduced grazing (in ten partly open exclosures), and former grazing (on a 40 acre area) on vegetation structure (height and cover per 1/4meter2) of dry-mesic sand prairie, the dominant vegetation type at the Savanna Army Depot, IL.
Extent: 7 pages
The Morton Arboretum's Gravel and Dolomite Prairie Restoration Development Plan (3.114672)
Date: March 1992Creator: Bowles, Marlin L.
Type: Document
Description:This paper covers The Morton Arboretum's plan to restore a gravel and dolomite prairie on the Arboretum's grounds, It covers the natural communities, the endangered and threatened plants included in the restoration, and the steps necessary to establish and maintain the restoration.
Extent: 58 pages
Presentation of $8,000 check to The Morton Arboretum from Chevron Corporation (3.4063)
Date: April 1992Type: Photographic image
Description:Presentation of $8,000 check to The Morton Arboretum from Chevron Corporation, for subsidizing a paper on restoration of ecosystems for Cambridge University Press by Arboretum researchers, Christopher Whelan and Marlin Bowles
(L to R): Dr. Gerry Donnelly, Patrick Y. O'Brien (Coordinator for Chevron, Ecological Services and Conservation Health Environment and Loss Prevention)
Extent: 1 photograph
Status and Population Fluctuations of the Eastern Prairie Fringed Orchid [Platanthera leucophaea (Nutt.) Lindl] in Illinois (3.57437)
Date: 1992Creator: Bowles, Marlin L.
Type: Article
Endangered Species Habitat (3.6177)
Date: March 26 1992Creator: Tyznik, Anthony
Type: Map
Description:Layout of habitat with elevations
Extent: 1 sheet
1992 Annual Report, Research Group (3.81725)
Date: 1992Type: Document
Description:Annual report for the Research Group of the Morton Arboretum which contains a mission statement, group structure, chronology of events, interactions, priorities, and strengths and weaknesses.
Extent: 8 sheets