烟台四十里湾营养物质产生特征及影响分析

2004年5月3日至10日,烟台四十里湾养殖区发生了由棕囊藻、夜光藻剧增而引发的赤潮,此前,在1998年8月中旬至9月中旬,该湾约五十平方公里的近岸海域,也曾发生了红色裸甲藻剧增而引发的赤潮。暴发赤潮的条件仍可认为是丰富的营养物质基础和适宜的环境条件。初步分析结果表明,赤潮形成所必须的营养物质主要是养殖粪便及其废弃物提供的,其次是陆岸生活污水提供的;环境条件是风、雨引起了水体扰动;雨过天晴水温偏高;大雨造成海水盐度降低;养殖过密,海流不畅对污染物扩散不利。

Producttion and Feature of nutrition at Sishi Li Harbor in Yantai and it infanalysis

From May 3~(rd) to May 10~(th) 2004,the red-tide caused by the intense increase of Phaeocystis sp and Noctiluca scientillans happened at Sishi Li Harbor Culture District.From mid-August to mid-September in 1998,a red-tide caused by the great increase of Gymnodinium sanguineum happened at the coast which is about 50 square meters from Laishan District Yantai to Yangma Island Muping.The reason of the red-tide can still be counted as the abundant nutrients and suitable environment.It can be conclude from the first analysis that the nutrients contributing to the red-tide are mainly provided by the culture dejecta and its offals,and partly provided by the polluted water from the coastal area.Referring to the environmental situation,it can be concluded as follows: first the rain and wind cause the movement of the water,then temperature of water will increase when it's fine after rain.And the salinity of the sea water decreases because of the rain.The high density and the block of water will hinder the diffusion of the pollutant.