湖泊科学2011，Vol.23Issue(3)：417-423,7.
上海淀山湖水生高等植物现状及其近30年变化
Current status and 30-year changes in aquatic macrophytes in Lake Dianshan, Shanghai
摘要
Abstract
The current status of aquatic macrophytes in Lake Dianshan was surveyed from August 2009 to May 2010. The succession tendency of aquatic vegetation and reasons for the diversity loss were discussel. The results showed that the aquatic flora in the Lake Dianshan included 29 species which belong to 25 genera, 18 families, now the proportion of cultivated or exotic species was higher than that in the past. The aquatic vegetation, especially submerged vegetation, was shrinking dramatically during the past 30 years. Main vegetation type now has switched from submerged to free-floating, meanwhile Potamogeton malaianus has replaced Vallisneria natans to be the dominant species of submerged vegetation. In addition, increased nutrient concentration and decreased water transparency, combined with enhanced growth of planktonic and epiphytic algae, accounted for substantial portions of both the decline of aquatic vegetation and succession of submerged dominant species. Furthermore, a range of human activities alang with urban and fisheries development have accelerated the aquatic vegetation decline as well as influenced the direction of succession and diversity patterns. The high natrient level, low water transparency and intensive human disturbance in Lake Dianshen would make recovery of aquatic vegetation difficult.关键词
淀山湖/水生高等植物/生物多样性/人为干扰/逆向演替Key words
Lake Dianshan/ aquatic maecrophytes/ biodiversity/ artificial disturbance/ degradation引用本文复制引用
施文,刘利华,达良俊..上海淀山湖水生高等植物现状及其近30年变化[J].湖泊科学,2011,23(3):417-423,7.基金项目
海市科委重大科技攻关研究项目(08DZ1203101,08DZ1203102)、上海市科技兴农重点攻关项目(沪农科攻字(2007)第1-v4号)和国家自然科学基金项目(40971041)联合资助. （08DZ1203101,08DZ1203102）
