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Scatter-hoarding rodents prefer slightly astringent food
1Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Yunnan, China.
Plos One
|November 3, 2011
Summary
Rodents prefer seeds with moderate tannin levels, avoiding high concentrations that harm their health. This suggests a balanced co-evolution between plants and rodents, benefiting both without precise chemical control.
Area of Science:
- Ecology
- Animal Behavior
- Plant-Animal Interactions
Background:
- Mutualistic interactions between scatter-hoarding rodents and seed plants are complex.
- Plants use defensive compounds like tannins to influence rodent foraging, but evidence is inconclusive.
Purpose of the Study:
- To investigate the role of tannin concentration in rodent scatter-hoarding behavior.
- To determine the impact of dietary tannin levels on rodent health and survival.
Main Methods:
- Utilized an artificial seed system to control tannin concentrations.
- Conducted feeding trials and field observations to assess rodent behavior and health outcomes.
Main Results:
- Rodents favored seeds with intermediate tannin levels (~5%) in field studies.
- High tannin diets (10-25%) negatively impacted rodent survival and health.
- Tannin levels from 0-5% did not significantly affect rodent outcomes.
Conclusions:
- Scatter-hoarding rodents exhibit a preference for slightly astringent seeds.
- Tannins may reduce general predation but do not precisely control mutualistic rodent behavior.
- Plant-rodent interactions appear to be a co-evolved balance benefiting both partners.
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