摘要
本文从物种结构、水平结构和垂直结构三方面结合其时间特征对湖北省斧头湖莲群落的结构进行了分析,结果表明:①莲群落物种组成复杂,生长型类型多样,是一多优群落,挺水、浮水和沉水三个植被层都很发达;②莲群落中明显地表现出了优势种的替代过程,沉水植被层中菹草、黑藻和金鱼藻的替代尤为明显,各物种的个体生态学习性的差异是造成这种现象的主要原因;③莲群落内部表现出不同物种的种群分布在水平方向上的分化,莲的叶片和花果均表现出群聚分布的式样,是一种形态学格局;④莲群落垂直结构复杂,一般存在三个植被层,不同植被层的变化各有其特征。
The structure of Com. Nelumbo nucifera was analysed in detail. The community was a polydominant one, characterised by its rich flora and growth-form, and had well developed emergent, leaves-floating and submersed vegetation strata. The dominant species showed obvious alternation, especially Potamogeton crispus, Hydrilla verticillata and Ceratophyllum demersum in the submersed stratum. We think the main reason for this phenomenon is their different autecological characters. The distributions of different populations showed zonation. In addition, the leaves, flowers and fruits of N. nucifera showed patterns which could be attributed to the branching features of its rhizom system. The vertical structure was also described, three vegetation strata(emergent, leaves-floating, submersed) could be distinguished in most area of the community. Owing to the growth pattern of the parvopotamids and the water level, a microstratification was developed in the submersed stratum.
出处
《武汉植物学研究》
CSCD
1992年第3期273-279,共7页
Journal of Wuhan Botanical Research
基金
国家教委博士点基金
关键词
莲群落
挺水植被
植物群落学
Com.Nelumbo nucifera
Species composition
Vertical structure
Horizontal structure
