银胶菊对漳州市杂草群落和物种多样性的影响

利用样方法调查漳州市不同生境下银胶菊分布区的杂草种类和分布情况,计算杂草重要值和生物多样性指数,探讨银胶菊对杂草群落组成和物种多样性的影响以及评估漳州市银胶菊入侵状况。结果表明,漳州市银胶菊分布区中有杂草26科91种;影响银胶菊及伴生杂草分布发生的主要因素是人为干扰、土壤水分、光照条件;在银胶菊为单优势种的建筑荒地和拓荒地生境,群落Shannon-Wiener指数和Pielou均匀度指数明显低于银胶菊重要值较低的农田生境;漳州市银胶菊现在处于种群建立后期,在这一阶段会形成强大土壤种子库,如不采取有效措施,将可能对当地生态和经济造成重大损失。

Influence of Parthenium hysterophorus on Weed Community and Species Diversity in Zhangzhou

Using the intercept method,this paper investigated Parthenium hysterophorus distritution area's weed species and distribution with different habitats in Zhangzhou.The important value of weed and diversity index were caculated.The aim were to study influence of Parthenium hysterophorus on community of weed and species diversity and estimation of invation of Parthenium hysterophorus.The results showed there were 26 families and 91 speciese weed in habitats with Parthenium hysterophorus in Zhangzhou.The levels of human disturbance,the soil humidity and illumination were main factors affecting the occurrence and distribution of weed species.The Shannon-Wiener index and Pielou evenness indexes in construction waste and frontier land where Parthenium hysterophorus was dominant species were lower than those in farmland where Parthenium hysterophorus was not dominant species.Zhangzhou Parthenium hysterophorus lied in the later estabish stage which powerful soil weed bank was farmen.If effective measures were not taken,the invasion of Parthenium hysterophorus would cause the local ecological and economic great loss.