Tree mycorrhizal strategies regulate diversity-productivity relationships across forest strata along soil fertility  

作　　者：Ying Che Guangze Jin 

机构地区：[1]School of Ecology,Northeast Forestry University,Harbin,150040,China [2]Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education,Northeast Forestry University,Harbin,150040,China [3]Northeast Asia Biodiversity Research Center,Northeast Forestry University,Harbin,150040,China

出　　处：《Forest Ecosystems》2025年第2期335-345,共11页森林生态系统(英文版)

基　　金：financially supported by the Natural Science Foundation of Heilongjiang Province of China(No.TD2023C006);the Fundamental Research Funds for the Central Universities(No.2572022DS13).

摘　　要：The symbiotic relationships between trees and different mycorrhizal fungi affect the biodiversity-ecosystem functioning relationships within forest communities,particularly across different strata from the understorey to the overstorey.However,current research on this relationship has not yet reached a definitive conclusion.In this study,we used regression analyses and structural equation modelling based on a 9-ha mixed broadleaved-Korean pine(Pinus koraiensis)forest plot to explore the effects of different types of mycorrhizal fungi(arbuscular mycorrhizal(AM)and ectomycorrhizal(EM)fungi)on the relationship between tree species diversity and productivity.The study found that the dominance and productivity of AM species increased in the understorey with increasing soil nutrients,whereas the productivity of EM species declined despite increasing diversity.In the overstorey,the productivity of AM species continued to increase with increasing soil nutrients,while that of EM species decreased due to increased competition.As for diversity-productivity relationships(DPRs),in the understorey,both AM and EM tree species demonstrated a positive DPR,suggesting the presence of the niche complementarity effect.In the overstorey,AM species continue to exhibit positive DPR due to their competitive advantage in nutrient-rich environments.In contrast,EM species exhibit negative DPR due to increased competition or less efficient resource use.Additionally,slope influenced forest productivity indirectly by altering the accumulation and distribution of soil nutrients,thereby affecting species distribution and growth conditions.This indirect effect highlights the potential negative impact of slope on soil nutrients within forest ecosystems,as well as its influence on the relationships between biodiversity and ecosystem functions.The study reveals how AM and EM trees influence forest productivity through distinct adaptability and competitive strategies across different forest strata,with a particular emphasis on the strata-dependent ef

关 键 词：Arbuscular mycorrhizal ECTOMYCORRHIZAL Soil fertility Forest productivity Species diversity 

分 类 号：S718.5[农业科学—林学]