Multidiversity-multifunctionality relationship is driven by different body size soil organisms and season: Evidence from rubber plantation agroforestry system in Southwestern China

Four main taxa, using molecular (bacteria, fungi, and nematodes) and morphological (arthropods) tools were selected for assessing soil multidiversity ranging from bacteria to invertebrates. We measured 12 ecosystem functions regulated by soil organisms under the following categories: provisioning services (litter mass: particularly aboveground litter content), water availability (soil moisture), belowground primary productivity (biomass of fine root), nutrient provisioning (extracellular enzyme activities related to sugar degradation [β- glucosidase and saccharase], chitin degradation [N-acetylglucosamines], P mineralization [phosphatase], soil total C, N, and P availability), element cycling (HyN), and nutrient relations (pH).

本研究遴选四大生物类群，分别借助分子生物学手段（应用于细菌、真菌与线虫类群）与形态学鉴定手段（应用于节肢动物类群），对覆盖细菌至无脊椎动物的土壤多类群生物多样性开展评估。本研究测定了由土壤生物调控的12项生态系统功能，相关指标划分为以下类别：供给服务（provisioning services）（枯落物量：尤以地上枯落物含量为代表）、水分可利用性（土壤含水率）、地下初级生产力（细根生物量）、养分供给（糖类降解相关胞外酶活性[β-葡萄糖苷酶（β-glucosidase）与蔗糖酶（saccharase）]、几丁质降解相关胞外酶活性[N-乙酰葡糖胺（N-acetylglucosamines）]、磷矿化相关胞外酶活性[磷酸酶（phosphatase）]，以及土壤总碳、总氮与总磷可利用性）、元素循环（HyN）与养分关系（pH值）。