Impact of the non-indigenous shrub species Spartium junceum (Fabaceae) on native vegetation in central Spain  

作　　者：Rosario G.Gavilán Daniel Sánchez-Mata Mylena Gaudencio Alba Gutiérrez-Girón Beatriz Vilches 

机构地区：[1]Departamento de Biología Vegetal II,Facultad de Farmacia,Universidad Complutense,Plaza de Ramón y Cajal s/n,E-28040 Madrid,Spain

出　　处：《Journal of Plant Ecology》2016年第2期132-143,共12页植物生态学报（英文版）

基　　金：Madrid Regional Government(REMEDINAL2 Project:S2009/AMB-1783 and REMEDINAL3-CM,S2013/MAE-2719).

摘　　要：Aims The introduction of potentially invasive species through ornamental cultivation or for rehabilitation purposes is a serious environmental problem.They cause damage to biodiversity through loss,increased mortality or‘in situ’selection phenomena in natural flora.Spartium junceum is a Mediterranean shrub that is not native in most areas of the Iberian Peninsula,although it is extensively grown for the rehabilitation of roadsides.We have investigated the effect on the native vegetation of an old S.junceum(Fabaceae)plantation in a conservation area in the centre of the Iberian Peninsula:the Cuenca Alta del Manzanares nature reserve in Madrid.Methods We compared S.junceum stands with the native nanophanerophytic Cistus ladanifer community at different ecosystem properties:soil properties,temporal soil seed bank contents,standing vegetation and net primary production of annual grasslands growing in these shrublands.Important Findings The results highlighted S.junceum’s ability to become established in the new environment(marginal areas of the nature reserve)and ensure its successful growth.This is more apparent in northern and eastern exposures where this formation contacts with the core of the best conserved native vegetation in the nature reserve.Soils under Spartium showed a higher nitrogen content,indicating its capacity-in common with other legumes-to fix N,and conferring an advantage over Cistus,which is N-limited.Other soil nutrients such as phosphorus,magnesium and calcium and water availability are also higher in Spartium soils than in Cistus.Phosphorus is usually a constraint for N-fixers,but in our study,it is the most significant soil variable in both shrub formations and is important to the success of Spartium.Water availability is a key factor for Mediterranean vegetation,and particularly in autumn when soils are recharged.The Spartium formation is able to retain water as its growth produces a closer canopy than Cistus,thereby preventing water evaporation and contributing to the success of this

关 键 词：Cistus ladanifer community structure old fields invasive species Mediterranean plant communities non-native species soil seed bank SHRUBLANDS rehabilitation practices 

分 类 号：S15[农业科学—土壤学]