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The effect of temperature on the sensitivity of Daphnia magna to cyanobacteria is genus dependent
Author(s) -
Hochmuth Jennifer D.,
De Schamphelaere Karel A.C.
Publication year - 2014
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.2681
Subject(s) - aphanizomenon , daphnia magna , cyanobacteria , anabaena , oscillatoria , biology , microcystis , daphnia , botany , microcystis aeruginosa , branchiopoda , cladocera , cylindrospermopsis raciborskii , ecology , zooplankton , toxicity , chemistry , bacteria , organic chemistry , genetics
In the present study, the authors investigated the effects of 6 different genera of cyanobacteria on multiple endpoints of Daphnia magna in a 21‐d life table experiment conducted at 3 different temperatures (15 °C, 19 °C, and 23 °C). The specific aims were to test if the effect of temperature on Daphnia 's sensitivity to cyanobacteria differed among different cyanobacteria and if the rank order from most to least harmful cyanobacteria to Daphnia reproduction changed or remained the same across the studied temperature range. Overall, the authors observed a decrease in harmful effects on reproduction with increasing temperature for Microcystis , Nodularia , and Aphanizomenon , and an increase in harmful effects with increasing temperature for Anabaena and Oscillatoria . No effect of temperature was observed on Daphnia sensitivity to Cylindrospermopsis . Harmful effects of Microcystis and Nodularia on reproduction appear to be mirrored by a decrease in length. On the other hand, harmful effects of Anabaena , Aphanizomenon , and Oscillatoria on reproduction were correlated with a decrease in intrinsic rate of natural increase, which was matched by a later onset of reproduction in exposures to Oscillatoria . In addition, the results suggest that the cyanobacteria rank order of harmfulness may change with temperature. Higher temperatures may increase the sensitivity of D. magna to the presence of some cyanobacteria ( Anabaena and Oscillatoria ) in their diet, whereas the harmful effects of others ( Microcystis, Nodularia , and Aphanizomenon ) may be reduced by higher temperatures. Environ Toxicol Chem 2014;33:2333–2343 . © 2014 SETAC