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Stable Isotope Diagrams of Freshwater Food Webs
Author(s) -
Fry Brian
Publication year - 1991
Publication title -
ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.144
H-Index - 294
eISSN - 1939-9170
pISSN - 0012-9658
DOI - 10.2307/1941580
Subject(s) - ecology , stable isotope ratio , food web , content (measure theory) , geography , environmental science , biology , trophic level , mathematics , physics , quantum mechanics , mathematical analysis
This formula may be used to calculate 95% confidence intervals around mi values (Fig. 1), aiding the comparison of survivorship patterns in the cohorts (Lee 1980). When this procedure is applied to the data of Pyke and Thompson (1986), the analysis shows that the mortality rates differ significantly in the two cohorts during the intervals between days 0-10, 10-20, 30-40, and 50-60, confirming the conclusions of the analysis of the residuals generated during calculation of the logrank statistic.