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Related Experiment Video

Updated: May 8, 2026

An Optimized Rhizobox Protocol to Visualize Root Growth and Responsiveness to Localized Nutrients
07:45

An Optimized Rhizobox Protocol to Visualize Root Growth and Responsiveness to Localized Nutrients

Published on: October 22, 2018

Ecosystem-level controls on root-rhizosphere respiration.

Francesca Hopkins1, Miquel A Gonzalez-Meler, Charles E Flower

  • 1Department of Earth System Science, University of California, Irvine, CA 92697, USA.

The New Phytologist
|August 15, 2013
PubMed
Summary
This summary is machine-generated.

Soil respiration is driven by photosynthesis, not just temperature. New models are needed to predict carbon sequestration by incorporating root respiration linked to gross primary productivity (GPP).

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Area of Science:

  • Soil science
  • Ecology
  • Biogeochemistry

Background:

  • Soil respiration is a key process in the carbon cycle.
  • Understanding the drivers of soil respiration is crucial for ecosystem modeling.
  • Recent advances allow partitioning of soil respiration into autotrophic and heterotrophic components.

Purpose of the Study:

  • To synthesize research on soil respiration components.
  • To evaluate the effects of nitrogen, temperature, and photosynthesis on autotrophic soil respiration.
  • To assess the role of gross primary productivity (GPP) in ecosystem root respiration.

Main Methods:

  • Literature synthesis of recent research on soil respiration partitioning.
  • Analysis of high temporal resolution soil respiration datasets.
  • Evaluation of biotic and environmental controls on respiration fluxes.

Main Results:

  • Gross primary productivity (GPP) significantly influences ecosystem root respiration and, to some extent, heterotrophic respiration.
  • Seasonal variations in photosynthetic products in the rhizosphere impact heterotrophic respiration.
  • Stored root carbon contribution to respiration varies seasonally, decoupling it from photosynthetic carbon.

Conclusions:

  • Ecosystem-scale models need updating to incorporate root respiration as a function of GPP.
  • Environmental variables modify belowground carbon allocation, impacting respiration.
  • Improved models are essential for predicting future ecosystem carbon sequestration.