摘要
以开垦小叶章湿地的恢复植被为对象,研究了不同自然恢复年限(5、8和12年)湿地植被的植物群落结构及物种多样性变化规律。结果表明:经过一定年限的自然恢复,植被已经较初期发生了明显的群落演替;植物种类逐渐增加,优势种由旱生植物宽叶山蒿逐渐演变为湿生植物小叶章,样地之间的物种组成存在明显差异;随着恢复年限的增加,植物群落的多样性指数Shannon-Wiener(H)值和优势度指数Simpson(D)值变化较为复杂,H值逐渐降低,D值则是先降低,后升高;对于同以小叶章为优势种的2个样地而言,恢复年限为8年的湿地H值要高于恢复年限为12年的湿地;经过不同时间的恢复,恢复年限为5年和8年湿地植物群落的相似度系数为50%,恢复年限为5年和12年湿地植物群落的相似度系数为43%,说明3个恢复湿地植物群落的组成之间存在一定的内在联系,随着恢复年限的增加,其相似性缓慢下降。
With the vegetations on reclaimed Calamagrostis angustifolia wetland as test objects, this paper studied the change patterns of their community structure and species diversity after different years （5, 8 and 12 years） of natural restoration. After definite years＇ restoration, the vegetations had a visible community succession. Plant species increased gradually, dominant species changed from Artemisia stolonifera to C. angustifolia, and species composition differed evidently with restoration year. With the increase of restoration year, the Shannon-Wiener index （H） was decreasing, while Simpson index （D） increased after an initial decrease. As for the two plots both with C. angustifolia as the dominant species, the plot with 8-year restoration had a higher H value than that with 12-year restoration. After different years＇ restoration, the Similarity index of the plant community between the wetlands with 5-year and 8-year restoration was 50% , and that between the wetlands with 5-year and 12-year restoration was 43%, suggesting that there was a definite inherent relationship between plant community composition and restoration year, i. e. , the longer the restoration year, the lower the plant community composition similarity.
出处
《生态学杂志》
CAS
CSCD
北大核心
2009年第9期1808-1812,共5页
Chinese Journal of Ecology
基金
国家自然科学基金重点项目(40830535/D0101)
中国科学院知识创新工程项目(KSCX2-YW-N-46-06)
中国科学院东北振兴科技行动计划重点资助项目(DBZX-2-204)
关键词
开垦湿地
湿地植被恢复
物种多样性
reclaimed wetland
wetland vegetation restoration
species diversity.
