Data from: Cushion plant morphology controls biogenic capability and facilitation effects of Silene acaulis along an elevation gradient

Giuliano Bonanomi, Adriano Stinca, Giovanni Battista Chirico, Giampiero Ciaschetti, Antonio Saracino & Guido Incerti
The stress-gradient hypothesis (SGH) predicts that the balance of plant–plant interactions shifts along abiotic environmental gradients, with facilitation becoming more frequent under stressful conditions. However, recent studies have challenged this perspective, reporting that positive interactions are, in some cases, more common at the intermediate level of environmental severity gradients. Here, we test whether and how neighbour effects by Silene acaulis cushions vary along a 700 m wide altitudinal transect, in relation to cushion morphological traits...
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