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The river animals have it worst.
河流中生活的物種正經歷最糟糕的困境。
Thanks to water extraction, dam building and other river-changing pursuits, more than three-quarters of river amphibians, fish and mammals have disappeared since 1970.
由于水源抽取、大壩建設及河道改遷等原因，自1970年以來超過四分之三的兩棲動物、魚類及哺乳動物已經從地球上消失。
That's not three quarters of species, mind you, it's three quarters of the individuals in a given population.
這里需要注意的是，不是四分之三的物種，而是一個族群的四分之三。
And it's not just the rivers.
不僅是河流里的動植物落得這樣的下場，
Nearly 40 percent of both land and sea animals, from sardines to elephants, have disappeared over the same time span.
近40%的陸地及海洋生物，從沙丁魚到大象無一幸免幾乎都在同一時間從地球上消失。
The numbers are from a new report from the conservation group World Wildlife Fund.
這是來自野生動植物保護組織世界野生動植物基金會最新報告所公布的數據。
These lost animals have been replaced by either people or our domesticated animals—chickens, cows and pigs, among others.
這些消失的動物已經被人工養殖或者家養的雞、奶牛、豬以及其它牲畜取代。
Farms to feed people displace forests that feed wildlife.
野生動植物提供給養的森林已經被為人們提供食物的農場所取代。
And people also eat wildlife directly, from fish to bushmeat.
此外，人們亦直接進食從魚到獸肉的野生動植物。
As a result, the survey finds fewer and fewer individuals among more than 3,000 species and 10,000 populations surveyed.
結果這份調查報告在3000多物種及1萬人口的調查中發現個體族群越來越少。
But there is hope.
但仍然存有希望。
The vast majority of these beleaguered species are not extinct.
大多數物種還沒有滅絕。
And in rich regions like the U.S., Europe and Japan, wildlife numbers are actually increasing:
而比如美國、歐洲和日本等物種豐富的地方野生動植物的數量實際上呈現增長趨勢：
coyote, deer, turkey and other forest animals, for example, as the forest regrows along the east coast of North America.
叢林狼、鹿、火雞等其它一些森林中生活的動物，由于北美東海岸的森林再生，個體數量也在增加。
Exporting that trend could help stave off the gathering sixth mass extinction.
這一趨勢有助于延緩第6次大規模物種滅絕。
