Expanding the mutualistic niche: parallel symbiont turnover along climatic gradients

Gregor Rolshausen, Uwe Hallman, Francesco Dal Grande, Juergen Otte, Kerry Knudsen & Imke Schmitt
Keystone mutualisms, such as corals, lichens, or mycorrhizae sustain fundamental ecosystem functions. Range dynamics of these symbioses are, however, inherently difficult to predict because host species may switch between different symbiont partners in different environments, thereby altering the range of the mutualism as a functional unit. Biogeographic models of mutualisms thus have to consider both, the ecological amplitudes of various symbiont partners, and the abiotic conditions that trigger symbiont replacement. To address this challenge, we...

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