Koorem Kadri, Snoek Basten L, Bloem Janneke, Geisen Stefan, Kostenko Olga, Manrubia Marta, Ramirez Kelly S, Weser Carolin, Wilschut Rutger A, van der Putten Wim H
Netherlands Institute of Ecology Wageningen The Netherlands.
Department of Botany Institute of Ecology and Earth Sciences University of Tartu Tartu Estonia.
J Ecol. 2020 Sep;108(5):1860-1873. doi: 10.1111/1365-2745.13409. Epub 2020 Jun 12.
Plant species that expand their range in response to current climate change will encounter soil communities that may hinder, allow or even facilitate plant performance. It has been shown repeatedly for plant species originating from other continents that these plants are less hampered by soil communities from the new than from the original range. However, information about the interactions between intra-continental range expanders and soil communities is sparse, especially at community level.Here we used a plant-soil feedback experiment approach to examine if the interactions between range expanders and soil communities change during range expansion. We grew communities of range-expanding and native plant species with soil communities originating from the original and new range of range expanders. In these conditioned soils, we determined the composition of fungi and bacteria by high-throughput amplicon sequencing of the ITS region and the 16S rRNA gene respectively. Nematode community composition was determined by microscopy-based morphological identification. Then we tested how these soil communities influence the growth of subsequent communities of range expanders and natives.We found that after the conditioning phase soil bacterial, fungal and nematode communities differed by origin and by conditioning plant communities. Despite differences in bacterial, fungal and nematode communities between original and new range, soil origin did not influence the biomass production of plant communities. Both native and range expanding plant communities produced most above-ground biomass in soils that were conditioned by plant communities distantly related to them. . Communities of range-expanding plant species shape specific soil communities in both original and new range soil. Plant-soil interactions of range expanders in communities can be similar to the ones of their closely related native plant species.
因当前气候变化而扩大其分布范围的植物物种，将会遇到可能阻碍、允许甚至促进植物生长的土壤群落。对于源自其他大陆的植物物种，已有反复研究表明，相较于来自原生分布范围的土壤群落，这些植物在新分布范围受到的土壤群落阻碍更小。然而，关于大陆内部分布范围扩张植物与土壤群落之间相互作用的信息却很稀少，尤其是在群落层面。在此，我们采用植物-土壤反馈实验方法，来研究分布范围扩张植物与土壤群落之间的相互作用在分布范围扩张过程中是否会发生变化。我们用源自分布范围扩张植物原生和新分布范围的土壤群落，培育分布范围扩张植物和本地植物物种的群落。在这些经过处理的土壤中，我们分别通过对ITS区域和16S rRNA基因进行高通量扩增子测序，来确定真菌和细菌的组成。线虫群落组成则通过基于显微镜的形态学鉴定来确定。然后，我们测试了这些土壤群落如何影响后续分布范围扩张植物和本地植物群落的生长。我们发现，在处理阶段之后，土壤细菌、真菌和线虫群落因来源以及处理植物群落的不同而有所差异。尽管原生和新分布范围的细菌、真菌和线虫群落存在差异，但土壤来源并未影响植物群落的生物量生产。本地植物群落和分布范围扩张植物群落在与它们亲缘关系较远的植物群落处理过的土壤中，地上生物量产量最高。分布范围扩张植物物种群落在原生和新分布范围的土壤中，都会塑造特定的土壤群落。分布范围扩张植物在群落中的植物-土壤相互作用，可能与其亲缘关系密切的本地植物物种相似。
