Summary of results of <sup>13</sup>C and <sup>15</sup>N isotope analysis (standard deviation in brackets) for taxa collected in the pre- (1993) and postdreissenid periods (2007–2009).
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资源简介：
Number in brackets beside year of collection and preservation method indicates how many of the total number of samples (n) were collected in that year or preserved using that method for taxa for which samples from more than one year or preservation methods were used.
创建时间：
2012-12-17
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