Effects of different invasion degrees of Ageratina adenophora on species diversity and functional diversity of herbaceous layer
Ageratina adenophora is one of the most harmful invasive plant species in China.To explore the effects of A.adenophora with different invasion degrees on the species diversity and functional diversity of plant communities,plots with different invasion degrees of A.adenophora were set up in the Xishan Nature Reserve of Chuxiong City,and the correlation between species diversity index and functional diversity index of herbaceous layer plants and environmental factors was analyzed.The results showed that,(1)There were multiple mechanisms dynamically influencing the herbaceous layer with different invasion levels;(2)Highly invasive A.adenophora significantly reduced the species diversity of the native plant community;(3)With the increase of invasion intensity,the functional trait structure of the community moved from aggregation to dispersal,and the role of competitive exclusion was gradually obvious;(4)The soil moisture content was a key environmental factor influencing the invasion of A.adenophora in this region.Therefore,both species diversity and functional diversity in the herbaceous layer were affected by the invasion of A.adenophora,and the local species with strong anti-interference ability can effectively resist the invasion pressure and maintain a stable population.
the degree of invasionAgeratina adenophoraChuxiong Cityspecies diversityfunctional diversity
NETL
NSTL
万方数据
