Award Date

1-1-1990

Degree Type

Thesis

Degree Name

Master of Science (MS)

Department

Biological Science

First Committee Member

Stanley D. Smith

Number of Pages

74

Abstract

Fossil woodrat middens from a wash near Searchlight Nevada were used to reconstruct the timing and magnitude of vegetation change using Larrea tridentata, Coleogyne ramosissima, and Yucca sp. The study revealed that Coleogyne appeared in the midden at 600 {dollar}\pm{dollar} 50 yr B.P., and full Coleogyne community establishment occurred by 470 {dollar}\pm{dollar} 60 yr B.P. The increase in Coleogyne was coincident with the climatic shifts during the Little Ice Age, 1250 A.D. to 1800 A.D., and was probably caused by increased precipitation.

Keywords

Little Ice Age; Impact; Nevada; Southern; Vegetation

Controlled Subject

Ecology; Paleoecology

File Format

pdf

File Size

1966.08 KB

Degree Grantor

University of Nevada, Las Vegas

Language

English

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