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Updated: Mar 29, 2026

Methods of Soil Resampling to Monitor Changes in the Chemical Concentrations of Forest Soils
Published on: November 25, 2016
Different cesium-137 transfers to forest and stream ecosystems
Masaru Sakai1, Takashi Gomi1, Junjiro N Negishi2
1Graduate School of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8, Saiwai-cho, Fuchu, Tokyo 183-8509, Japan.
Cesium-137 (137Cs) moves differently in forest versus stream ecosystems. Aquatic systems show reduced 137Cs in food resources and animals due to leaching, impacting nuclear contamination assessments.
Area of Science:
- Environmental Science
- Radiochemistry
- Ecology
Background:
- Understanding cesium-137 (137Cs) movement is vital for nuclear contamination management.
- Previous research on 137Cs transfer has largely focused on single ecosystems.
Purpose of the Study:
- To investigate the differential movement of 137Cs in adjacent forest and stream ecosystems.
- To compare 137Cs concentrations in detrital-based food webs of terrestrial and aquatic environments.
Main Methods:
- Comparative analysis of 137Cs concentrations in litter and animal communities.
- Study of adjacent forest and stream ecosystems with similar food web structures.
Main Results:
- Stream litter exhibited significantly lower 137Cs concentrations than forest litter due to leaching.
- 137Cs concentrations were reduced in both basal food resources and higher trophic animals in the stream ecosystem.
- Differences in litter 137Cs concentrations were reflected in the animal community.
Conclusions:
- Terrestrial and aquatic ecosystems show distinct pathways for 137Cs flow.
- Aquatic systems receiving terrestrial litter subsidies exhibit lower 137Cs burdens.
- This highlights the importance of considering ecosystem interactions in nuclear contamination studies.
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