Study on spatiotemporal changes of fine genetic structure along with regeneration processes of tree species.

本文研究了林木更新的三种不同过程对林分精细遗传结构的影响：（1）种子的二次传播，（2）多个世代的重叠，（3）个体间的完整。(1)二次扩散延长了种子在栓皮栎和水曲柳中的扩散距离。二次种子传播削弱了遗传结构。(2)重叠的队列削弱了遗传结构内的立场Stewartia monadelpha。(3)白桦种植园个体间的竞争主要表现为同胞个体间的竞争大于非亲缘个体间的竞争。因此，B天然更新同龄林分具有较强的遗传结构。maximowiczana将在其更新的早期阶段消失。

We studied on effects of three different processes of tree regeneration on fine genetic structure within stand ;(1) secondary seed dispersal,(2) overlapping of multi cohorts and(3) completion among individuals.(1) Distance of seed dispersal was prolonged by the secondary dispersal both in Quercus crispula and Fraxinus mandshurica. Then the genetic structure supposed to be weakened by the secondary seed dispersal.(2) Overlapped cohorts weakened the genetic structure within a stand of Stewartia monadelpha.(3) The competition among individuals was severer among siblings than among nonrelated individuals in a young plantation of Betula maximowicziana. Therefore, the strong genetic structure of naturally regenerated even-aged stand of B. maximowiczana will disappears in the early stage of its regeneration.