不同立地条件下白羊草群落物种多样性研究

Study on Species Diversity of Bothriochloa Ischaemum Community under Different Site Conditions

采用野外走访调查和样方法对沧州白羊草群落进行物种多样性研究,分析白羊草群落物种多样性对坡度和坡向的响应.结果表明:峁顶Peilou均匀度指数最大;阴坡Simpson优势度指数最大;Shannon-Wiener多样性指数、丰富度指数、Simpson多样性指数表现为阳坡最大.坡度较为平缓时,物种的种类较多.在不同坡向下,物种多样性指数之间的相关性达到了显著水平甚至极显著水平,而在不同坡度下,物种多样性指数之间无显著相关性.

The species diversity of Bothriochloa ischaemum community in Cangzhou was studied by field investigation and sampling method,and the response of species diversity of the community to slope and aspect was analyzed.The results showed that:both the Peilou evenness index of the hill top and the Simpson dominance index of the shady slope are the highest;the Shannon Wiener diversity index,richness index and Simpson diversity index of the sunny slope is the highest.When the slope is gentle,there are more species.Under different slopes,the correlation between species diversity indexes is significant or even extremely significant,while there is no noticeable correlation between species diversity indexes under different slopes.