Skip to main content
U.S. flag

An official website of the United States government

Publications

Filter Total Items: 1990

Nonnative brome grasses in the new national monument

No abstract available.
Authors
D. W. Davidson, Jayne Belnap

Evolution and life-history organization of Yellowstone cutthroat trout

No abstract available.
Authors
Robert E. Gresswell, Richard N. Williams, K. Shiokawa

A resource in crisis: Changing the measure of salmon management

No abstract available.
Authors
C.A. Frissell, W.J. Liss, R. E. Gresswell, R.K. Nawa

Alternative silvicultural approaches to timber harvesting: Variable retention harvest systems

No abstract available.
Authors
J.F. Franklin, D.F. Berg, D. Thornburg, J. C. Tappeiner

Perception of neighboring plants by rhizomes and roots: Morphological manifestations of a clonal plant

A previous study showed that clonal morphology of the rhizomatous grass Elymus lanceolatus ssp. lanceolatus (Scibner & J.G. Smith Gould) was influenced more by neighbouring root systems than by the local distribution of nutrients. In this study we determine whether individual rhizomes or roots of E. lanceolatus perceive neighbouring root systems and how this is manifested in morphological response
Authors
Elisabeth Huber-Sannwald, M. M. Caldwell, David A. Pyke

Field studies on pesticides and birds: Unexpected and unique relations

We review the advantages and disadvantages of experimental and field studies for determining effects of pesticides on birds. Important problems or principles initially discovered in the field include effects of DDT (through its metabolite DDE) on eggshell thickness, reproductive success, and population stability; trophic-level bioaccumulation of the lipid-soluble organochlorine pesticides; indirec
Authors
Lawrence J. Blus, Charles J. Henny