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Water stress strengthens mutualism among ants, trees, and scale insects.

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Academic year: 2017

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Figure 1. Schematic of relationships among water, carbon, and mutualistic carbohydrate allocation strategies
Figure 3. Mutualism strength increases as water availability decreases. (A) Relationship between annual precipitation of a site and the density of scale insects for all 26 sites (R 2 = 0.31, F 1,24 = 12.15, p,0.002)
Figure 4. Tree NSC pools and water stress. Total NSCs, starch and sucrose pools in main stems in (A) the late dry season (April 2009) at a wetter site (Santa Rosa; black bars) and a drier site (Chamela; white bars) and (B) the early dry season (October 200

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