Key Laboratory of Plant-Soil Interactions, Ministry of Education, Beijing Key Laboratory of Biodiversity and Organic Farming, College of Resources and Environmental Sciences, China Agricultural University, 2 Yuan Ming Yuan West Road, Beijing 100193, PR China.
School of Biological Sciences and Institute of Agriculture, The University of Western Australia, 35 Stirling Highway, Crawley, Perth, WA 6009, Australia; National Academy of Agriculture Green Development, China Agricultural University, 2 Yuan Ming Yuan West Road, Beijing 100193, PR China.
Trends Plant Sci. 2021 Dec;26(12):1227-1235. doi: 10.1016/j.tplants.2021.07.014. Epub 2021 Aug 13.
High biodiversity increases ecosystem functions; however, belowground facilitation remains poorly understood in this context. Here, we explore mechanisms that operate via 'giving-receiving feedbacks' for belowground facilitation. These include direct effects via root exudates, signals, and root trait plasticity, and indirect biotic facilitation via the effects of root exudates on soil biota and feedback from biota to plants. We then highlight that these two- or three-way mechanisms must affect biodiversity-ecosystem function relationships via specific combinations of matching traits. To tango requires a powerful affinity and harmony between well-matched partners, and such matches link belowground facilitation to the effect of biodiversity on function. Such matching underpins applications in intercropping, forestry, and pasture systems, in which diversity contributes to greater productivity and sustainability.
高生物多样性增加生态系统功能；然而，在这种情况下，地下促进作用仍知之甚少。在这里，我们探索通过“给予-接收反馈”来实现地下促进作用的机制。这些机制包括通过根分泌物、信号和根性状可塑性的直接效应，以及通过根分泌物对土壤生物群的间接生物促进作用和生物群对植物的反馈。然后，我们强调这两种或三种机制必须通过匹配特征的特定组合来影响生物多样性-生态系统功能关系。要想共舞，需要强大的亲和力和默契的舞伴之间的和谐，而这种匹配将地下促进作用与生物多样性对功能的影响联系起来。这种匹配是间作、林业和牧场系统中多样性有助于提高生产力和可持续性的基础。
