An estimated four thousand types of forams live in the world's oceans.
据估计，在海洋中生活着4000种有孔虫。
Forams thus play a significant role in the carbon cycle. (Magnification 75x)
有孔虫在整个地球的碳循环过程中扮演着重要的角色。
A marsh is typically home to several species of forams, which each prefer slightly different conditions.
不同种类的有孔虫可同时生存于一处沼泽中，但其各自所喜好的环境仍有些许不同。
Co-author Professor Malcolm Hart are presenting the research to the 2010 FORAMS meeting in Bonn on Friday 6 September.
合著者马尔科姆·哈特教授9月6日星期五在波恩举行的2010有孔虫会议上提交了该研究报告。
The record keepers are foraminifera - "forams" for short - creatures so small that several could sit together on a pinhead.
记录的保管者是有孔虫类-简称“有孔虫”-它非常小，小到几个有孔虫可以一起坐在针尖上。
The scientists began decoding that record by mapping the distribution of different foraminifera species -- or "forams" -- at 10 North Carolina marsh sites.
科学家们则通过对10处盐沼中不同种类有孔虫的分布情况进行绘图，从而对这一记录进行破解。
During glacial periods, the forams' shells contain more of the heavier of two oxygen isotopes, as the lighter one is preferentially accumulated in snow and ice rather than the ocean.
冰河时期海洋中多空虫贝壳化石中积聚的较重的氧同位素比较多，而另一种轻的氧同位素则更多地积聚在古代冰层和积雪中。
'Previous studies have shown a reduction in diversity of 30%, but this is even bigger for forams', said Dr Jason Hall-Spencer, one of the study's co-authors.' a tipping point occurs at mean pH 7.8.
“以前的研究已显示物种种类减少了30%，但有孔虫种类减少的则更多”，该研究报告的合著者之一，贾森·霍尔斯宾塞博士说：“在平均pH值7.”8时就会出现一个临界点。
'Previous studies have shown a reduction in diversity of 30%, but this is even bigger for forams', said Dr Jason Hall-Spencer, one of the study's co-authors.' a tipping point occurs at mean pH 7.8.
“以前的研究已显示物种种类减少了30%，但有孔虫种类减少的则更多”，该研究报告的合著者之一，贾森·霍尔斯宾塞博士说：“在平均pH值7.”8时就会出现一个临界点。
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