湿地种子库研究中的几个问题探讨

Several topics on wetland seeds bank research

湿地种子库研究对于生物多样性保护、湿地恢复和管理具有重要意义。国内外开展了大量湿地种子库以及利用种子库进行湿地植被恢复的研究,但是也存在一些问题。在分析了国内外湿地种子库研究的基础上,指出无性繁殖在湿地生态系统中广泛存在,而且很多优势物种以无性繁殖为主要的繁殖方式,因此,在湿地种子库研究中,采用广义种子库的概念更为科学。此外,干扰因素,尤其是水文条件变化对湿地种子库的影响非常大。水位的高低,洪水的强度、持续时间和频率都会显著影响种子库的物种组成和种子萌发格局,进而对地表植物群落产生影响。研究事实证明,在利用种子库进行湿地恢复时,也必须考虑干扰等因素的影响,否则很难实现群落结构和物种多样性的恢复。

The research of wetland seeds bank is important to biodiversity conservation, restoration and management of wetland. There were many researches on wetland seeds bank and wetland restoration through seeds bank. However, there were also some problems. Based on the analysis of research on wetland seeds bank both at home and abroad, the authors argued that vegetative propagation existed extensively in wetland ecosystems and was the main reproductive way for many dominant species. Therefore, it is scientific to use seed banks concept in a general way when conducting wetland seeds bank research. In addition, disturbance, especially hydrological changes, had a great influence on wetland seeds bank. Species composition and seed germination patterns, which would affect plant communities, were significantly influenced by water level, intensity and frequency of flood. The research indicated that disturbances should be taken into consideration when restoring the wetland with seeds tank, otherwise it would be difficult to restore the community structure and biodiversity. [Ch, 45 ref.]