Maritime safety and environmental experts have pointed out for years that this route passes through some of the stormiest seas and one of the most productive marine ecosystem in the world , and thus efforts should be increased to prevent and respond to vessel casualties in this region 多年来，海上安全和环境专家指出，这条航线穿过世界上一些最多风暴的海域和一个物产丰富的海洋生态系统，因而应该在这个区域加强努力来阻止和减少船员伤亡。
Friday , november 26 , 1999 three kinds of fishing apparatus and devices detrimental to fisheries and the marine eco - system will be prohibited starting december 31 , 1999 . the fisheries protection ( specification of apparatus ) notice gazetted today ( friday ) sets out the classes of apparatus to be prohibited for fishing under the fisheries protection regulations ( cap 政府今日（星期五）根据《渔业保护规例》在宪报刊登《渔业保护（指明器具）公告》 ，规定由一九九九年十二月三十一日起，禁止使用三种会对渔业及海洋生态系统造成损害的捕鱼器具。
However , except nitrate , the nitrogen concentration including nitrite , ammonia , don , pn and tn in spring 1998 were higher than those in autumn 1997 , with the average concentration of 4 . 9714 . 65 , 0 . 67 ? . 20 , 0 . 7210 . 30 , 9 . 2516 . 88 , 7 . 3014 . 42 and 22 . 9 ? 0 . 2 mol / dm3 in autumn , and 4 . 5812 . 39 , 0 . 70 + 0 . 14 , 2 . 2611 . 05 , 9 . 8814 . 92 , 7 . 8816 . 21 and 25 . 318 . 94 mol / dm3 in spring , respectively . the n / p ratio in autumn 1997 was 13 . 217 . 54 in average which a little lower than redfield ratio , nevertheless in spring 1998 the value was as high as 25 . 6113 . 0 , much hi gher than redfield ratio . there shows a clear seasonal variation of phosphorus structure in two seasons , but the nitrogen structure almost unchanged 两个季节海水中磷的结构变化明显，秋季磷主要以pp ( 54 )为主，而春季长江口营养盐、石油烃对海洋生态系统影响及动力学研究主要以po4一p ( 51 % )为主;两季节氮的结构基本一致，溶解氮都以don为主，分别为40 %和39 % :秋季no3一n比例较春季略高( 22 % ) ，而春季nh4一n比例较秋季略高( 9 % ) 。
The site provides information resources focusing on limnology ， lake management and freshwater benthic ecology ， as well as the domain of sustainable development of freshwater and marine eco - systems ， including knowledge of limnology , eutrophication , pollutants , lake restoration , as well as other related information 该网站重点提供有关湖沼学、湖泊管理和淡水底层生态学以及淡水和海洋生态系统可持续发展领域的信息资源，内容包括湖沼学、富营养化、污染物、湖泊恢复的知识以及其他有关的信息。
