文献类型：期刊文献

中文题名：A test of the mycorrhizal-associated nutrient economy framework in two types of tropical rainforests under nutrient enrichments

作者：Qingshui Yu[1] Suhui Ma[1] Xiaofeng Ni[1] Lai Jiang[1] Zhang Zhou[2] Jiangling Zhu[1] Chengjun Ji[1] Zhiyao Tang[1] Xiaoli Cheng[3] Jingyun Fang[1]

第一作者：Qingshui Yu

机构：[1]Institute of Ecology,College of Urban and Environmental Sciences,Key Laboratory for Earth Surface Processes of the Ministry of Education,Peking University,Beijing,100871,China;[2]Research Institute of Tropical Forestry,Chinese Academy of Forestry,Guangzhou 510520,China;[3]Key Laboratory of Soil Ecology and Health in Universities of Yunnan Province,School of Ecology and Environmental Science,Yunnan University,Kunming,650091,China

年份：2023

卷号：10

期号：1

起止页码：12-20

中文期刊名：森林生态系统：英文版

外文期刊名：Forest Ecosystems

收录：CSTPCD;;Scopus;CSCD:【CSCD2023_2024】；PubMed;

基金：supported by the National Natural Science Foundation of China(No.31988102);National Key Research and Development Program of China(No.2017YFC0503906)。

语种：英文

中文关键词：Nutrient cycling;Nutrient addition;Mycorrhizal association;Arbuscular mycorrhiza;Ectomycorrhiza;Tropical rainforest

分类号：S759.9

摘要：Shifts in tree species and their mycorrhizal associations driven by global change play key roles in biogeochemical cycles. In this paper, we proposed a framework of the mycorrhizal-associated nutrient economy(MANE), and tested it using nutrient addition experiments conducted in two tropical rainforests. We selected two tropical rainforests dominated by arbuscular mycorrhizal(AM) and ectomycorrhizal(ECM) trees, and established eighteen20 m×20 m plots in each rainforest. Six nitrogen(N) and phosphorus(P) addition treatments were randomly distributed in each rainforest with three replicates. We examined the differences in soil carbon(C) and nutrient cycling, plant and litter productivity between the two rainforests and their responses to 10-year inorganic N and P additions. We also quantified the P pools of plants, roots, litter, soil and microbes in the two rainforests. Overall,distinct MANE frameworks were applicable for tropical rainforests, in which soil C, N and P were cycled primarily in an inorganic form in the AM-dominated rainforest, whereas they were cycled in an organic form in the ECMdominated rainforest. Notably, the effects of mycorrhizal types on soil P cycling were stronger than those on C and N cycling. The intensified N and P deposition benefited the growth of AM-dominated rainforests instead of ECMdominated rainforests. Our findings underpin the key role of mycorrhizal types in regulating biogeochemical processes, and have important implications for predicting the ecological consequences of global changes.