Author

Graduation Date

Spring 1993

Document Type

Thesis

Program

Other

Program

Masters of Arts

Committee Chair Name

John O. Sawyer

Committee Chair Affiliation

Cal Poly Humboldt Faculty or Staff

Second Committee Member Name

Jenneth L. Lang

Third Committee Member Name

Andrea J. Pickart

Fourth Committee Member Name

Mike Mesler

Keywords

x

Abstract

This study documents vegetation changes on coastal dunes between Mad River and Little River, Humboldt County, California, from 1969 to 1990. Vegetation was sampled using a three-step successive refinement approach. After reconnaissance, a stratified random sampling design was used to locate 250 circular plots. Plant cover was estimated by species. Agglomerative hierarchical cluster analysis and divisive hierarchical two-way indicator species analysis (TWINSPAN) was used to document vegetation pattern. The resulting dendrograms and plots by species matrices allowed for a classification and description of the vegetation types.

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