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Related Experiment Video

Updated: Jun 22, 2026

Linking Predation Risk, Herbivore Physiological Stress and Microbial Decomposition of Plant Litter
10:20

Linking Predation Risk, Herbivore Physiological Stress and Microbial Decomposition of Plant Litter

Published on: March 12, 2013

Litter decomposition across multiple spatial scales in stream networks.

Scott D Tiegs1, Philips O Akinwole, Mark O Gessner

  • 1Department of Aquatic Ecology, Eawag: Swiss Federal Institute of Aquatic Science and Technology, Kastanienbaum, Switzerland. tiegs@oakland.edu

Oecologia
|June 9, 2009
PubMed
Summary
This summary is machine-generated.

Litter decomposition rates in stream networks showed minimal variation across spatial scales, with detritivores likely driving unexplained variability. This suggests litter decomposition assays are reliable for assessing ecosystem integrity.

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Area of Science:

  • Ecology
  • Ecosystem Science
  • Environmental Science

Background:

  • Understanding how ecological processes vary across spatial scales is crucial for ecological research.
  • Stream networks offer a hierarchical model for studying spatial variation in ecosystem processes.

Purpose of the Study:

  • To assess how litter decomposition rates vary across multiple spatial scales within stream networks.
  • To test if increasing spatial extent and stream size significantly influence decomposition variability.

Main Methods:

  • Litter decomposition was measured using coarse- and fine-mesh litter bags in riffles across 3rd-order streams within 4th-order watersheds.
  • Decomposition rates were also assessed along a stream-size gradient (orders 1-4).

Main Results:

  • Mesh size differences explained significant variability, while variation across watersheds was minor.
  • Differences in decomposition rates among streams and riffles were statistically significant but small.
  • Most variance (51%) remained unexplained, suggesting within-riffle processes and detritivore activity are key.

Conclusions:

  • Contrary to expectations, variability in litter decomposition did not consistently increase with spatial extent or stream size.
  • Detritivore activity likely contributes significantly to unexplained variance in decomposition rates.
  • Litter decomposition assays can reliably assess ecosystem integrity despite natural variability.