TERRESTRIAL ECOLOGY RESEARCH

An ecologist inspects cages placed around bagworm infestations of a red cedar tree that had been injected with radioactive cesium-134 to determine uptake of radioactivity in the larvae.

Checking pine seedlings exposed to ionizing radiation from a radioactive source (on tripod) in a controlled ecosystem. Seedlings on left were fully exposed, those in the middle were exposed on their tops only, and those on the right were exposed on their stems only.

Biologist studying the root distribution of plants by injecting radionuclides into the soil and measuring plant uptake.

A thriving Messerschmidia plant growing on Rongelap Atoll is studied for growth-rate and root-systems data after the island was accidentally subjected to radioactive fallout.