The ecology of native and introduced thistles

by

Daniel A. Gluesenkamp

B.A. (University of California, Santa Cruz) 1992

A thesis submitted in partial satisfaction of the

requirements for the degree of

Doctor of Philosophy

in

Integrative Biology

in the

GRADUATE DIVISION

of the

UNIVERSITY of CALIFORNIA, BERKELEY

Committee in charge:

Professor Carla M. D’Antonio, Chair

Professor Wayne P. Sousa

Professor Steven Welter

Spring 2001

Introductory materials.

Factors controlling the relative abundance of two thistle species.

Direct and indirect effects of soil fertility on the population biology of thistles.