英语听力：自然百科 大堡礁 珊瑚礁至雨林(21)（在线收听）

A combination of all these factors means the population in the southern part of the reef has halfed in the last decade.

综合以上因素，在过去的10年里，大堡礁南部地区的儒艮数量下降了一半。

Now there are just 11 thousand left in the entire great barrier reef region.

现在整个大堡礁仅剩下11000只。

Yet there are still more dugongs in Australian waters than any other place on earth.

不过澳大利亚的儒艮数量却是全球各水域里最多的。

Dugongs are not the only animals to feed on sea grass, young green turtles like it too.

除了儒艮，幼年的绿海龟也是海草牧场的常客。

He's after the most tender shoots, and this is his exclusive patch.

它爱吃嫩叶子，这片草场是它的专属牧场。

He's very choosy about what he likes and what he doesn't.

它可是个挑剔的主儿，喜欢什么不喜欢什么，界线分明。

Like a lawn, sea grass needs to be constantly cut short for healthy growth, so he's actually farming his own little plot that he'll tend for several months before moving on.

如我们的草坪一样，海草也得不断修剪才能长得更茁壮。以此来看，海龟是在照料它的自留地。在此照料几个月后，绿海龟将继续向大海进发。

Sea grass meadows are also nurserys for baby fish like these domino damselfish.

海草牧场也是幼鱼们的育婴堂。比如这群三点白。