Peng Shao-Lin, Ren Hai, Wu Jian-Guo, Lu Hong-Fang
South China Institute of Botany, Chinese Academy of Sciences, Guangzhou 510650, China.
J Environ Sci (China). 2003 May;15(3):367-71.
The removal of litterfall in the Eucalyptus plantations in South China affected the plant biodiversity in these ecosystems was found based on the field observation and lab analysis. The protection times of species diversity of three Eucalyptus communities were different (Community I with no protection, Community II with 7-year-protection, Community III with 35-year-protection). The total numbers of species in these communities (from Community I to II to III) are 1, 6, and 17 respectively. The results showed that the protection of litterfall from being taken out of the ecosystem is important and can increase plant species diversity. This study combined biomass data, the chemical and physical properties of the soil, and the diversity of microbes in the communities. It is concluded that the mechanism of the effects of litter removal on biodiversity includes three factors: removing the suitable habitat of microbe and animal, decreasing the soil nutrient, and changing the special habitat for the germination and growth of invading plants. These results should have important implications for managing these Eucalyptus forest ecosystems in South China.
基于实地观察和实验室分析发现，在中国南方桉树人工林中去除凋落物会影响这些生态系统中的植物生物多样性。三个桉树群落物种多样性的保护时间各不相同（群落I无保护，群落II保护7年，群落III保护35年）。这些群落中的物种总数（从群落I到群落II再到群落III）分别为1、6和17种。结果表明，保护凋落物不被从生态系统中移除很重要，并且可以增加植物物种多样性。本研究结合了生物量数据、土壤的化学和物理性质以及群落中微生物的多样性。得出的结论是，去除凋落物对生物多样性的影响机制包括三个因素：去除微生物和动物的适宜栖息地、降低土壤养分以及改变入侵植物萌发和生长的特殊栖息地。这些结果对中国南方这些桉树林生态系统的管理应具有重要意义。
