摘要
通过对浑善达克沙地种子植物的生活型和水分生态型多样性分析,结果表明:科的生活型中,含草本的科占主导地位,占种子植物总科数的65.4%,且大部分属于世界分布类型;属的生活型中,落叶灌木和陆生草本相对发达,且大部分属于温带分布类型,尤其以北温带成分占优势,世界分布的属也占有相当的比例;种的生活型中,草本植物共有900种,占本区总种数的85.2%,其中,种子植物区系中草本植物占绝对优势并组成以草本植物为主的植被类型;种的水分生态型中,中生植物所占的比例最大,占总种数的46.0%,其次是旱生植物,这也表明本区仍保留有典型草原的特征,中生植物在本区的组成成分中占绝对优势。
Some basic methods and principles of the floristic geography were applied to analyze the life forms and water ecotypes of seed plants in Hunshandake sand. The results indicated that for the life forms of the families, the families including herb account 65.4% for the total seed plant families, and majority of them belong to the world distributed type. For the life forms of the genera, defoliate shrubs and terrestrial herbs are relatively developed, and majority of belonged to the temperate zone distribution type, north temperate zone component take dominant position, the world distribution also account for a bit of proportion. In life forms of the species, there are 900 species of herbage, which account 85.2% for the total species of the seed plant. In the seed plant flora the herb account the absolute superiority and compose the herb vegetation types. In water ecotypes of the species, the mesophyte occupies the bigger proportion, which account 46.0% for the total species of the seed plant, next is the xerophil, which also indicated that the tudy area still remain the typical steppe characteristics, the mesophyte occupies the absolute superiority in the components.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2009年第3期166-170,共5页
Journal of Arid Land Resources and Environment
基金
中国科学院知识创新工程项目(KSCX1-08)
国家自然科学基金项目(30560128)资助
