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Updated: Aug 20, 2025
Linking Predation Risk, Herbivore Physiological Stress and Microbial Decomposition of Plant Litter
Published on: March 12, 2013
Fauna access outweighs litter mixture effect during leaf litter decomposition
Denis Mburu Njoroge1, Gbadamassi G O Dossa2, Luping Ye3
1CAS Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla, Yunnan 666303, China; CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China; University of Chinese Academy of sciences (UCAS), Beijing 100049, China; Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan 430074, China.
Soil fauna significantly accelerate litter decomposition, with their impact being additive to litter mixture effects. Litter decomposition and mixture effects are influenced by incubation time and litter quality dissimilarities.
Area of Science:
- Ecology
- Soil Science
- Biogeochemistry
Background:
- Litter decomposition is influenced by species diversity, litter quality, and decomposer interactions.
- Previous studies show conflicting results on litter mixture richness effects.
- The combined impact of litter diversity and soil fauna on decomposition is not well understood.
Purpose of the Study:
- To investigate how litter diversity and soil fauna interactions affect litter mixture decomposition rates.
- To disentangle the contributions of different soil fauna groups to decomposition.
- To understand the role of litter quality dissimilarity and incubation duration on decomposition.
Main Methods:
- A 16-month common garden experiment using litterbags with three mesh sizes (micro, meso, macro).
- Examined decomposition of five single litters and 26 mixtures (2-5 species).
- Evaluated mass loss at multiple time points (1, 3, 6, 9, 16 months).
Main Results:
- Soil fauna accelerated mass loss by 29.8% on average.
- Mesofauna contribution was similar to meso- and macrofauna combined.
- Litter mixture effects decreased over time and were influenced by litter quality dissimilarity and fauna.
Conclusions:
- Soil fauna's contribution to decomposition is additive and independent of litter richness or dissimilarity.
- Understanding litter decomposition requires considering both species dissimilarity and soil fauna.
- Incubation duration, litter quality dissimilarity, and soil fauna interact to determine mixture effects.
