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Modelling mycorrhizal fungi dispersal by the mycophagous swamp wallaby (Wallabia bicolor)

Citation

Danks, Melissa A. et al. (2020), Modelling mycorrhizal fungi dispersal by the mycophagous swamp wallaby (Wallabia bicolor), Dryad, Dataset, https://doi.org/10.5061/dryad.08kprr50t

Abstract

Despite the importance of mammal-fungal interactions, tools to estimate the mammal-assisted dispersal distances of fungi are lacking. Many mammals actively consume fungal fruiting bodies, the spores of which remain viable after passage through their digestive tract. Many of these fungi form symbiotic relationships with trees and provide an array of other key ecosystem functions. We present a flexible, general model to predict the distance a mycophagous mammal would disperse fungal spores. We modelled the probability of spore dispersal by combining animal movement data from GPS-telemetry with data on spore gut-retention time. We test this model using an exemplar generalist mycophagist, the swamp wallaby (Wallabia bicolor). We show that swamp wallabies disperse fungal spores hundreds of metres—and occasionally up to 1265 m—from the point of consumption, distances that are ecologically significant for many mycorrhizal fungi. In addition to highlighting the ecological importance of swamp wallabies as dispersers of mycorrhizal fungi in eastern Australia, our simple modelling approach provides a novel and effective way of empirically describing spore dispersal by a mycophagous animal. This approach is applicable to the study of other animal-fungi interactions in other ecosystems.

Methods

Methods are described in the published article.

Funding

Hermon Slade Foundation, Award: HSF08-6

Australian Research Council, Award: DP0557022