Canopy structure:An intermediate factor regulating grassland diversity-function relationships under human disturbances
作者机构：State Key Laboratory of Vegetation and Environmental ChangeInstitute of BotanyChinese Academy of SciencesBeijing 100093China University of Chinese Academy of SciencesBeijing 100049China Institute of EcologyCollege of Urban and Environmental SciencePeking UniversityBeijing 100871China Patent Examination Cooperation Sichuan Center of the Patent OfficeChina National Intellectual Property AdministrationChengduSichuan 610213China Department of Environmental SciencesPolicy and ManagementUniversity of CaliforniaBerkeleyCA 94720United States Division of Agriculture and Natural ResourcesUniversity of CaliforniaBerkeleyCA 94720United States Institute of Remote Sensing and Geographical Information SystemsSchool of Earth and Space SciencesPeking UniversityBeijing 100871China
出 版 物：《Fundamental Research》 (自然科学基础研究（英文版）)
年 卷 期：2023年第3卷第2期
页 面：179-187页
核心收录：
基 金：supported by the Strategic Priority Research Program of Chinese Academy of Sciences (XDA26010101 XDA23080301)
主 题：Grassland ecosystem function Canopy structure Plant species diversity Human activity intensity Northern agro-pastoral ecotone
摘 要：Grasslands are one of the largest coupled human-nature terrestrial ecosystems on Earth,and severe anthropogenic-induced grassland ecosystem function declines have been reported *** factors influencing grassland ecosystem functions is critical for making sustainable management *** structure is an important factor influencing plant growth through mediating within-canopy microclimate(e.g.,light,water,and wind),and it is found coordinating tightly with plant species diversity to influence forest ecosystem ***,the role of canopy structure in regulating grassland ecosystem functions along with plant species diversity has been rarely ***,we investigated this problem by collecting field data from 170 field plots distributed along an over 2000 km transect across the northern agro-pastoral ecotone of *** net primary productivity(ANPP)and resilience,two indicators of grassland ecosystem functions,were measured from field data and satellite remote sensing *** laser scanning data were collected to measure canopy structure(represented by mean height and canopy cover).Our results showed that plant species diversity was positively correlated to canopy structural traits,and negatively correlated to human activity *** structure was a significant indicator for ANPP and resilience,but their correlations were inconsistent under different human activity intensity *** to plant species diversity,canopy structural traits were better indicators for grassland ecosystem functions,especially for *** structure equation modeling analyses,we found that plant species diversity did not have a direct influence on ANPP under human ***,it had a strong indirect effect on ANPP by altering canopy structural *** to resilience,plant species diversity had both a direct positive contribution and an indirect contribution through mediating canopy *** study highlig
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