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A combination of all these factors means the population in the southern part of the reef has halfed in the last decade.
綜合以上因素，在過去的10年里，大堡礁南部地區的儒艮數量下降了一半。
Now there are just 11 thousand left in the entire great barrier reef region.
現在整個大堡礁僅剩下11000只。
Yet there are still more dugongs in Australian waters than any other place on earth.
不過澳大利亞的儒艮數量卻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，幼年的綠海龜也是海草牧場的常客。
He's after the most tender shoots, and this is his exclusive patch.
它愛吃嫩葉子，這片草場是它的專屬牧場。
He's very choosy about what he likes and what he doesn't.
它可是個挑剔的主兒，喜歡什么不喜歡什么，界線分明。
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.
如我們的草坪一樣，海草也得不斷修剪才能長得更茁壯。以此來看，海龜是在照料它的自留地。在此照料幾個月后，綠海龜將繼續向大海進發。
Sea grass meadows are also nurserys for baby fish like these domino damselfish.
海草牧場也是幼魚們的育嬰堂。比如這群三點白。
