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Are soil lichen communities structured by biotic interactions?

April 26, 2017biotic communities lichen lichens null soil structured symbiosis

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Are soil lichen communities structured by biotic interactions?

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Question: Are soil lichen communities structured by biotic interactions? Location: Gypsum outcrops located next to Belmonte del Tajo, central Spain. Methods: We sampled a total of 68 (50 cm x 50 cm) plots in gypsum outcrops from central Spain. Each plot was divided into 100 (5 cm x 5 cm) sampling quadrats, and the presence of all lichen species in every quadrat was recorded (6800 quadrats in total). We used two realistic null models to generate random communities unstructured by biotic interactions, and used them to test the hypothesis that soil lichen species co-occur less often than expected by chance.