而且一种生态系统越来越多物种的离开，也意味着沼泽、树林或池塘将失去其独特性，变为其他，这是一种体系水平的灭绝。

And taking more and more species from an ecosystem raises concerns that the swamp, woods or pond will lose its distinctive traits, becoming something else, in a form of system-level extinction.

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它们常见于淡水沼泽和池塘，从哥伦比亚一直到巴西，足迹遍布整个亚马逊盆地。

They are found in freshwater marshes and pools throughout the Amazon Basin, from Colombia to Brazil.

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后来，工人挖开一条新河道，不料将池塘和沼泽中的小鱼困住。

Then workers opened a freshly dug river channel that? Stranded small fish in ponds and marshes.

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