文献类型：期刊文献

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

作者：Yu, Qingshui[1] Ma, Suhui[1] Ni, Xiaofeng[1] Jiang, Lai[1] Zhou, Zhang[2] Zhu, Jiangling[1] Ji, Chengjun[1] Tang, Zhiyao[1] Cheng, Xiaoli[3] Fang, Jingyun[1,4]

第一作者：Yu, Qingshui

通信作者：Fang, JY[1];Fang, JY[2]

机构：[1]Peking Univ, Inst Ecol, Coll Urban & Environm Sci, Key Lab Earth Surface Proc,Minist Educ, Beijing 100871, Peoples R China;[2]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Peoples R China;[3]Yunnan Univ, Sch Ecol & Environm Sci, Key Lab Soil Ecol & Hlth Univ Yunnan Prov, Kunming 650091, Yunnan, Peoples R China;[4]Peking Univ, Inst Ecol, Beijing 100871, Peoples R China

年份：2023

卷号：10

外文期刊名：FOREST ECOSYSTEMS

收录：;Scopus(收录号：2-s2.0-85145725168);WOS:【SCI-EXPANDED(收录号:WOS:000938191200001)】；

基金：Funding This work was supported by the National Natural Science Foundation of China (No. 31988102) and National Key Research and Development Program of China (No. 2017YFC0503906) .

语种：英文

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

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 eighteen m x 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 an inorganic form in the AM-dominated rainforest, whereas they were cycled in an organic form in the ECM -dominated rainforest. Notably, the effects of mycorrhizal types on soil P cycling were stronger than those on C and cycling. The intensified N and P deposition benefited the growth of AM-dominated rainforests instead of ECM -dominated 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.