植冠种子库及其生态意义研究

Canopy seed bank and its ecological significance:A review.

植冠种子库由成熟的种子宿存在植冠上形成.种子可在植物植冠中存留1～30年或者更长时间.40属木本植物中有1 200种植物具有植冠种子库,它们大多分布在火灾易发区和干旱区.植冠种子库是植物繁殖对策的一个方面,具有延缓繁殖体传播、使繁殖体免受捕食、调节萌发时间、将种子降落在适宜位置等生态功能.本文对植冠种子库的概念、分类、具有植冠种子库物种的地理分布、植冠种子库的研究现状及植冠种子库研究中存在的问题进行了论述.应加强对干旱区植冠种子库种子脱落机制和沙漠地区植冠种子库生态意义的研究.

Canopy seed bank refers to the seed retention in plant canopy. About 1200 species of 40 woocty genera can retain seeds in their canopy for 1 - 30 years or more, and most of these species are distributed in fire-prone floras and arid regions. Canopy seed bank functions the protection of seeds from predator, and the adjustment of seed germination time. This paper presented the concept of canopy seed bank, its classification, and the geographical distribution of species with canopy seed bank, aimed to provide valuable information for concerned studies, and suggested that the studies on the release mechanisms of canopy-stored seeds and the ecological significance of canopy seed bank on sand dune should be strengthened.