退化红壤区植被恢复过程中灌木层主要种群的生态位特征

选择闽西典型退化红壤地区,对6个不同恢复阶段的封育马尾松群落灌木层主要种群的生态位特征进行了分析,结果表明,多数种群的生态位宽度较窄,对资源的利用不充分,生态位宽度较大的种群顺序与其重要值大小顺序存在一致性,同时种群间生态位重叠较为普遍,对资源的利用方式相对一致。这些结果与退化红壤区植被恢复过程中生境条件的变化密切相关,有助于理解植被恢复动态规律,指导运用人工措施以加快恢复进程。

The niche characters of dominant species in shrub layer of restoring communities in degraded red soil region

With the important value, the niche of dominant species in shrub layer of restoring %Pinus massoniana %Lamb. communities during 6 different restoration periods in typical degraded red soil region in west of Fujian Province was studied. The results showed that niche breadth values of most populations were narrow, the resources were not utilized completely, and the species order sorted by niche breadth values accorded with that sorted by important values. The results also showed that there were prevalent niche overlap among the populations, indicating the ways were similar in use of resources by the populations. These results correlated closely with changes of habitate in restoring communities, which can help us to understand the dynamics of restoration community and offer more useful approaches to accelerate the restoration process.