摘要
在对乐清湾和杭州湾滩涂湿地的植被、植物种类及围垦时间进行生态调查的基础上,分析了围垦后植物多样性的变化及引起变化的原因.结果显示:(1)建塘时间对植物种类有明显的影响,物种数随着建塘时间的推移而增加;当建塘时间超过30年,其土壤已基本接近中性,群落中的植物种类明显增加.(2)离海塘的距离对物种多样性有着及其重要的影响,一般来说,随着离海塘距离的增加,物种多样性明显增加.(3)土地利用方式对植物种类有明显影响,不同的利用方式,植物种类明显不同.(4)互花米草Spartina alterniflora与芦苇Phragmites australis具有相近的生长特性和竞争力,慈溪样地这两个物种之间表现出一种消长关系.
Based upon a survey of vegetation, species and reclaimed time in Yueqing Bay and Hangzhou Bay, the variation of species diversity after reclamation and its reason were analyzed. The obtained data were analyzed by the adiversity estimation formulas, and the results showed that: (1) Plant species was affected significantly by the terms of seawall built. Species number increased along with seawall built time, and species in communities increased greatly when the seawall built time was over tri-decades. (2) Species diversity increased crucially with the distance far away from seawall. The farther distance was, the higher was the diversity. (3) Species composition was different among the distinguishing utilization approaches of land. (4) Spartina alterni flora and Phragmites australis posed ebb and flow from each other in Cixi plot, because their similar growth characters and competitive capability,
出处
《浙江大学学报(理学版)》
CAS
CSCD
北大核心
2006年第3期324-328,332,共6页
Journal of Zhejiang University(Science Edition)
基金
浙江省自然科学基金重大项目"浙江省滩涂围垦对湿地生态系统的影响与围垦模式研究"(No.ZE0204)
关键词
滩涂湿地
围垦
植物多样性
beach wetland
reclamation
plant diversity