某金矿排水沟沿线植物多度和物种多样性分析

Analysis on the Abundance of Plant and Diversity of Species along the Gold Mine Drainage

以潼关县某金矿生产区废水沟沿线植物为研究对象,对其进行抽样调查、标本采集和鉴定,分析各物种组成的数量特征及各样区植物的多样性。结果表明,污水道沿途各样区受污染影响植物组成偏少;所有植物中分布极多的植物种类较少,仅有葎草(Humulus scandens)和狗牙根[Cynodondactylon(Linn.)Pers.];分布稀少和个别的植物种类较多,占全部植物种类的38%;样区11的物种多样性指数为所有调查样区中最高,香农-威纳指数为2.47,均匀度为0.82;而样区32无植物生长,为大片裸地。

The plant around wastewater ditch at Tongguan county was chosen as the research object, and the sampling sur- vey, specimen collection and appraisal were carried on, quantitative characteristic of each species and diversity of plants in each area were analyzed. The results showed that all sampling areas had less species with being affected by pollution. The sort numbers of plant having a wide distribution was few, only included Humulus scandens and Cynodondactylon （Linn.） Pers. The plants having a rare distribution were a lot, and the occupation rate was 38%. The abundance index in eleventh sampling area was ＇the highest in all sampling areas, and its Shannon-Weiner index and species evenness individually was 2.47 and 0.82 respectively. No plant growed in the thirty-second sampling area and it was a bare land.