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Related Experiment Video

Updated: May 22, 2026

Continuous Hydrologic and Water Quality Monitoring of Vernal Ponds

Continuous Hydrologic and Water Quality Monitoring of Vernal Ponds

Published on: November 13, 2017

Reciprocal subsidies in ponds: does leaf input increase frog biomass export?

Julia E Earl¹, Raymond D Semlitsch

¹Division of Biological Sciences, University of Missouri, Columbia, MO, 65211, USA. jee9rb@mail.missouri.edu

|May 25, 2012

Summary

Ecosystem subsidies can increase resource export, but ambient resources matter. Leaf litter subsidies, not primary productivity, were key for frog biomass export in this pond-forest study.

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Area of Science:

Ecology
Ecosystem Science
Aquatic Ecology

Background:

Reciprocal subsidies involve paired ecosystems exchanging resources.
The impact of ambient resources on subsidy export dynamics remains unclear.
Understanding these interactions is crucial for ecosystem management.

Purpose of the Study:

To develop a conceptual framework for reciprocal subsidies.
To empirically test this framework using a pond-forest system.
To investigate the influence of ambient resources and detrital inputs on reciprocal subsidy export.

Main Methods:

Utilized in situ pond mesocosms to simulate ecosystem interactions.
Introduced three anuran species (wood frogs, American toads, southern leopard frogs).
Manipulated ambient resources (primary productivity) and detrital subsidy input (leaf litter).

Main Results:

Increased primary productivity decreased frog biomass, except when leaf litter was added.
Leaf litter input decoupled the negative effect of primary productivity on frog biomass.
Subsidy inputs generally increased reciprocal exports, partially supporting the conceptual framework.

Conclusions:

Detrital subsidies and associated microbial communities are critical for aquatic-forest subsidy dynamics.
Algal productivity's role in frog production may be less significant than detrital inputs.
Findings highlight the complex interplay between resource subsidies and ecosystem productivity.