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Updated: Jul 5, 2026
12:24
Laboratory Estimation of Net Trophic Transfer Efficiencies of PCB Congeners to Lake Trout (Salvelinus namaycush) from Its Prey
Published on: August 29, 2014
Global synthesis reveals systematic variation in trophic transfer efficiency across and within ecosystems
Danping Wu1, Junjie Zheng1,2, Shipeng Nie1
1Institute of Ecology, College of Urban and Environmental Sciences, and State Key Laboratory of Vegetation Structure, Function and Construction (VegLab), Peking University, Beijing, China.
Science Advances
|July 3, 2026
Summary
Trophic transfer efficiency (TTE) averages 5.92% for energy, below the 10% rule. Nutrient transfer efficiency (TTEn) averaged 11.13%, showing ecosystem-specific variations.
Area of Science:
- Ecology
- Ecosystem Dynamics
- Nutrient Cycling
Background:
- Trophic transfer efficiency (TTE) quantifies energy/nutrient flow between trophic levels.
- A widely accepted ~10% rule for energy transfer lacks broad empirical validation.
- Understanding TTE is crucial for ecological modeling and sustainability assessments.
Purpose of the Study:
- To empirically test the 10% rule for energy transfer.
- To compare energy transfer efficiency (TTEe) and nutrient transfer efficiency (TTEn).
- To investigate factors influencing TTE variation across ecosystems.
Main Methods:
- Compiled 2052 TTE estimates from 122 diverse ecological studies.
- Analyzed TTEe and TTEn data across marine, freshwater, and terrestrial ecosystems.
- Examined relationships between TTEe and environmental factors (e.g., temperature) and consumer traits.
Main Results:
- Average TTEe was 5.92%, significantly lower than the 10% assumption.
- Average TTEn was 11.13%.
- Marine ecosystems showed higher TTEe (8.13%) than freshwater (5.53%) and terrestrial (1.52%) systems. TTEe decreased with temperature in freshwater and was lower for higher trophic levels and endotherms.
Conclusions:
- The 10% rule for energy transfer is not universally supported by empirical data.
- Significant variation exists in TTE across different ecosystems and conditions.
- Further research is needed to refine our understanding of TTE dynamics and their ecological implications.
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