山西霍山落叶阔叶林边缘效应的研究

通过对山西霍山暖温带森林植被片断化后不同地带不同群落边缘的边缘植被的调查，运用Shannon-Wiener物种多样性指数(D)，Simpson生态优势度指数(C)，边缘效应强度指数(Z)和各层次各物种的重要值(IV)，对霍山暖温带落叶阔叶林的边缘效应进行了初步的研究。研究表明：(1)在群落的各种边缘区，边缘具有增大物种多样性的作用．(2)距林道边缘10m左右，物种多样性指数呈一峰值，10m以后指数逐渐降低并趋于平缓，在距自然空地5～10m处是物种多样性指数最高的地段，随后，随进入林内而逐渐减少并趋于平缓，在人工林的交错区内是物种多样性指数的高峰段，随后进入林内逐渐减少。距灌木丛交错区10m以后物种多样性指数出现高峰，随后逐渐减少并趋于平缓．(3)连翘、羊胡子草等植物是群落的优势种，且大多呈连续分布。

Study on edge effect of deciduous broad-leaved forest in warm-temperate zone of Mt.Huoshan

In the paper,the edge effect of deciduous broad-leaved forest in the warm-temperate zone were studied by means of using Shannon-Wiener species diversity index (D),Simpson index (C),the strength of the edge effect index,and importance value (IV) of every species in every distance as well.The results as follows:(1) Near the edge,there appeared a highest value of species diversity;(2) Between 0~5 m,the species diversity is higher,and revealed significant diversity after 5 m;(3) Carex buergeriana,Forsythia suspensa (Thunb) Vahl are the essentials and distribute continually.