No consistent legacy effects of invasion by giant goldenrod(Solidago gigantea)via soil biota on native plant growth  

作　　者：Jenifer König Mark van Kleunen Wayne Dawson 

机构地区：[1]Department of Biology,University of Konstanz,Universitaetsstrasse 10,Konstanz D78457,Germany

出　　处：《Journal of Plant Ecology》2016年第3期320-327,共8页植物生态学报（英文版）

基　　金：funding from the Deutsche Forschungsgemeinschaft(AZ DA 1502/1-1).

摘　　要：Aims Changes in soil microbial communities after occupation by invasive alien plants can represent legacy effects of invasion that may limit recolonization and establishment of native plant species in soils previously occupied by the invader.In this study,for three sites in southern Germany,we investigated whether invasion by giant goldenrod(Solidago gigantea)leads to changes in soil biota that result in reduced growth of native plants compared with neighbouring uninvaded soils.Methods We grew four native plant species as a community and treated those plants with soil solutions from invaded or uninvaded soils that were sterilized,or live,with live solutions containing different fractions of the soil biota using a decreasing sieve mesh-size approach.We measured aboveground biomass of the plants in the communities after a 10-week growth period.Main FindingsAcross all three sites and regardless of invasion,communities treated with<20μm soil biota or sterilized soil solutions had significantly greater biomass than communities treated with the complete soil biota solution.This indicates that soil biota>20μm are more pathogenic to the native plants than smaller organisms in these soils.Across all three sites,there was only a non-significant tendency for the native community biomass to differ among soil solution types,depending on whether or not the soil was invaded.Only one site showed significant differences in community biomass among soil solution types,depending on whether or not the soil was invaded;community biomass was significantly lower when treated with the complete soil biota solution than with soil biota<20μm or sterilized soil solutions,but only for the invaded soil.Our findings suggest that efforts to restore native communities on soils previously invaded by Solidago gigantea are unlikely to be hindered by changes in soil microbial community composition as a result of previous invasion.

关 键 词：exotic plants invasive plant impacts plant-soil feedback soil microbes 

分 类 号：S15[农业科学—土壤学]