A study published in the December 2009 Ecological Applications shows that keeping more fish in the sea may give an ecosystem some protection against unwanted algae.
在2009年12月号生态学应用杂志上发表的一项研究显示海中鱼类增多可保护生态系统不受讨厌的海藻污染。
Because countless ecological opportunities remained for fish underwater, plenty of them remained aquatic.
因为海底的生态环境仍然为水族提供了无尽的生存机会，所以很多鱼仍然是水栖动物。
In May, the department completed a trial scheme of dredging the seabed sediment in the Cheung Sha Wan and Sham Wan Fish Culture Zones with a view to improving the Marine ecological environment there.
在五月，该处完成一项试验计划，清理长沙湾及深湾海鱼养殖区海﨟的淤泥，以期改善该等水域的生态环境。
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