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Perhaps you meant tropic levels?

Search results for "trophic levels"

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The Effects of Atomic Radiation on Oceanography and Fisheries  (1957)

Insect-Pest Management and Control  (1969)

Radioactivity in the Marine Environment  (1971)

Fire Research Abstracts and Reviews, Volume 17  (1975)

Effects of a Polluted Environment: Research and Development Needs  (1977)

Arsenic: Medical and Biological Effects of Environmental Pollutants  (1977)

Consensus Study Report

Atmosphere-Biosphere Interactions: Toward a Better Understanding of the Ecological Consequences of Fossil Fuel Combustion  (1981)

Climate in Earth History: Studies in Geophysics  (1982)

Disposal of Industrial and Domestic Wastes: Land and Sea Alternatives  (1984)

Acid Deposition: Effects on Geochemical Cycling and Biological Availability of Trace Elements  (1985)

Consensus Study Report

Oil in the Sea: Inputs, Fates, and Effects  (1985)

Consensus Study Report

Ecological Knowledge and Environmental Problem-Solving: Concepts and Case Studies  (1986)

Consensus Study Report

The Mono Basin Ecosystem: Effects of Changing Lake Level  (1987)

Fisheries Technologies for Developing Countries  (1988)

Biodiversity  (1988)

Consensus Study Report

Opportunities in Biology  (1989)

Contaminated Marine Sediments: Assessment and Remediation  (1989)