残次油松林群落特征与生物多样性恢复

在河北省兴隆县雾灵山国家级自然保护区研究了经长期人为破坏的残次油松林的群落特征及其在不同保护年限下的生物多样性恢复规律。研究表明，与正常林分相比，残次林的物种多样性指数大幅度降低，物种数量显著减少。在植物和昆早群落各参数的变化中，以灌木和天敌昆虫类群受影响最大，其科数分别减少５５．５６％和６０％，科－种多样性指数分别减少３０．１％和６０．７２％。

Community characteristics of degraded Chinese pine stands and their biodiversity restoration

The community characteristics of degraded Chinese pine ( Pinus tabulaeformis Carr.) stands which were damaged for a long time (23 years) by mankind and the restoration of their biodiversity after different years (2,5,11 and 19 years) of protection were studied. Investigations showed that the numbers of species in the degraded stands were obviously reduced and their diversity indices were significantly lower compared with that in the stands without damage. For the variation degrees of plant and insect gro...