程海水生植被现状及其演变趋势

近20年来，程海水生植物种类和群落类型进一步趋于简单化，水生植被覆盖度由24％～75％变为0．2％～85％，分布最大水深虽由4．5m延伸至5．5m，分布面积却由527．8hm2缩减为73．05hm2，资源蕴藏量由4766吨降低至314．53吨。分析认为：程海南部大面积适生生境破坏、水质污染、水体富营养化、不合理放养草鱼是加剧其水生植被衰退的主要原因。提出了恢复南部湿地、削减入湖污染物、禁止投放草鱼、控制水质污染和水体富营养化等保护对策。

Current Status and Evolution Trend of Aquatic Vegetation in Chenghai Lake

Aquatic species and population in Chenghai Lake had been dramatically changed in recent two decades. Coverage percentage of aquatic vegetation had varied from a range of 24%-75% to that of 0.2%-85%; and its maximum distribution depth had increased from 4.5m to 5.5m; but the corresponding coverage area had been shrunk from 527.8hm2 to 73.05hm2; the resource storage had reduced from 4766 tons to 314.53 tons. Analysis indicates that destruction of suitable habitat in southern part of the lake, pollution, eutro...