Ecological Farming Systems, Agroscope Reckenholz Tänikon, Research Station ART, Reckenholzstrasse 191, CH-8046 Zürich, Switzerland.
Ecol Lett. 2011 Oct;14(10):1001-9. doi: 10.1111/j.1461-0248.2011.01666.x. Epub 2011 Jul 25.
Soil microbes play key roles in ecosystems, yet the impact of their diversity on plant communities is still poorly understood. Here we demonstrate that the diversity of belowground plant-associated soil fungi promotes plant productivity and plant coexistence. Using additive partitioning of biodiversity effects developed in plant biodiversity studies, we demonstrate that this positive relationship can be driven by complementarity effects among soil fungi in one soil type and by a selection effect resulting from the fungal species that stimulated plant productivity the most in another soil type. Selection and complementarity effects among fungal species contributed to improving plant productivity up to 82% and 85%, respectively, above the average of the respective fungal species monocultures depending on the soil in which they were grown. These results also indicate that belowground diversity may act as insurance for maintaining plant productivity under differing environmental conditions.
土壤微生物在生态系统中发挥着关键作用，但它们的多样性对植物群落的影响仍知之甚少。在这里，我们证明了地下植物相关土壤真菌的多样性可以促进植物生产力和植物共存。我们利用在植物生物多样性研究中开发的生物多样性效应的附加分区方法，证明这种正相关关系可以由一种土壤类型中的土壤真菌之间的互补效应驱动，也可以由一种选择效应驱动，这种选择效应是由在另一种土壤类型中最能刺激植物生产力的真菌物种产生的。真菌物种之间的选择和互补效应分别使植物生产力提高了 82%和 85%，高于各自真菌物种在生长土壤中单培养的平均水平。这些结果还表明，地下多样性可以作为在不同环境条件下维持植物生产力的保险。
