Related Experiment Video
Updated: Jun 1, 2026
08:39
Simulating Temperature in a Soil Incubation Experiment
Published on: October 28, 2022
Soil warming, carbon-nitrogen interactions, and forest carbon budgets
Jerry M Melillo1, Sarah Butler, Jennifer Johnson
1The Ecosystem Center, Marine Biological Laboratory, Woods Hole, MA 02543, USA. jmelillo@mbl.edu
Summary
Soil warming caused carbon loss from forest soil but increased tree growth, leading to a near balance by year seven. This highlights the crucial role of nitrogen in forest carbon storage.
Area of Science:
- Forestry
- Ecology
- Climate Science
Background:
- Forest ecosystems play a vital role in global carbon storage.
- Climate change, particularly warming, can significantly impact these ecosystems.
- Understanding soil and plant responses to warming is crucial for predicting future carbon dynamics.
Purpose of the Study:
- To quantify the effects of soil warming on carbon storage in a deciduous forest.
- To investigate the interplay between soil organic matter decomposition, nitrogen availability, and plant carbon uptake.
- To assess the net carbon balance in response to long-term soil warming.
Main Methods:
- A 7-year field experiment involving soil warming in a New England deciduous forest.
- Monitoring of carbon fluxes between soil, plants, and the atmosphere.
- Measurement of soil organic matter decomposition rates and nitrogen availability.
- Assessment of carbon sequestration in tree woody tissues.
Main Results:
- Soil warming led to increased decomposition of soil organic matter and carbon loss from the soil.
- Warming stimulated carbon gains in tree woody tissues, primarily due to increased nitrogen availability.
- A cumulative net loss of carbon from the ecosystem was observed over the 7-year study.
- By the seventh year, carbon gains in plants nearly offset carbon losses from the soil.
Conclusions:
- Soil warming alters forest carbon dynamics by increasing both soil carbon loss and plant carbon uptake.
- Nitrogen availability is a key factor mediating plant responses to warming.
- Accurate earth system models require the integration of carbon-nitrogen interactions to simulate land feedbacks to climate change.
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