Disentangling the relative importance of spatio-temporal parameters and host selectivity in shaping AMF communities in temperate forests

Many woody and herbaceous plants in temperate forests cannot establish and survive in the absence of mycorrhizal associations. Here, we address and hierarchize how Glomeromycota, a group of soil-borne fungi, forming a ubiquitous type of mycorrhiza, varied in a temperate forest patch in Germany with time, space, plant hosts but also the proximity to Glomeromycota-associating woody species. The communities of Glomeromycota in our study were non-random. We observed that space had a greater impact on fungal community structure than either time or proximity to Glomeromycota-associating trees but unlike host identity did not alter Glomeromycotan richness. The set of parameters which we addressed has rarely been studied together and we believe that the resulting ranking could ease prioritizing some of them to include in future surveys. Glomeromycota are crucial for the establishment of understory plants in temperate forests making it desirable to further explore how they vary in time and space.