Journal
OIKOS
Volume 125, Issue 12, Pages 1712-1718Publisher
WILEY
DOI: 10.1111/oik.03297
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Funding
- Natural Science Foundation of China [31330013, 31470113, 31372212]
- State Key Laboratory of Integrated Management of Pest Insects and Rodents [ChineseIPM1404]
- 'Strategic Priority Research Program' of the Chinese Academy of Sciences [XDB11050300]
- State Key Laboratory of Forest and Soil Ecology [LFSE2015-01]
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Scatter-hoarding of seeds by animals plays an essential role in seed dispersal of plants and in shaping plant-animal interactions in forest ecosystems, but the function of scatter-hoarding behavior is still unclear. We hypothesize that weak olfactory cues between seeds and scatter-hoarding animals would increase scatter-hoarding. Using a rodent-plant system of Siberian chipmunks Tamias sibiricus and Korean pines Pinus koraiensis, we tested the effects on seed scatter-hoarding intensity by measuring and modifying the seed odor intensities and the abilities of the animals to detect seed odor. Siberian chipmunks seemed to scatter-hoard more seeds with weaker odor signals, and Siberian chipmunks with reduced olfactory ability scatter-hoarded more seeds, supporting our hypothesis. Our studies suggest that olfaction may have played an important role in the evolution of the strength of seed odor and scatter-hoarding behavior of animals, and in shaping plant-animal interactions.
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