| Abstract: | Pyrocystis lunula is a unicellular, marine, photoautotrophic, bioluminescent dinoflagellate. This organism is used in the Lumitox ?? bioassay with inhibition of bioluminescence re-establishment as the endpoint. Experiments determined if acute changes in pH, salinity, or temperature had an effect on the organisms‘ ability to re-establish bioluminescence, or on the bioassay‘s potential to detect sodium dodecyl sulfate (SDS) and copper toxicity. The re-establishment of bioluminescence itself was not very sensitive to changes in pH within the pH 6-10 range, though reducing pH from 8 to levels below 6 decreased this capacity. Increasing the pH had little effect on Cu or SDS toxicity, but decreasing the pH below 7 virtually eliminated the toxicity of either compound in the bioassay. Lowering the salinity from 33 to 27??? or less resulted in a substantial decrease in re-establishment of bioluminescence, while increasing the salinity to 43 or 48 ??? resulted in a small decline. Salinity had little influence on the bioassay‘s quantification of Cu toxicity, while the data showed a weak negative relationship between SDS toxicity and salinity. Re-establishment of bioluminescence showed a direct dependence on temperature, but only at 10??C did temperature have an obvious effect on the toxicity of Cu in this bioassay. ?? 2003 Elsevier Science Ltd. All rights reserved. |
| Genre: | Article |
| ProdID: | 70025217 |
| Citation Author: | Craig, J. M.; Klerks, P. L.; Heimann, K.; Waits, J. L. |
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| Citation End Page: | 275 |
| Citation Issue: | 2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Environmental Pollution |
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| Citation Number Of Pages: | 9 |
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| Citation Search Results Text: | Effects of salinity, pH and temperature on the re-establishment of bioluminescence and copper or SDS toxicity in the marine dinoflagellate Pyrocystis lunula using bioluminescence as an endpoint; 2003; Article; Journal; Environmental Pollution; Craig, J. M.; Klerks, P. L.; Heimann, K.; Waits, J. L. |
| Citation Start Page: | 267 |
| Citation Volume: | 125 |
| Citation Year: | 2003 |
| Type: | citation/reference |
| Text: | Effects of salinity, pH and temperature on the re-establishment of bioluminescence and copper or SDS toxicity in the marine dinoflagellate Pyrocystis lunula using bioluminescence as an endpoint; 2003; Article; Journal; Environmental Pollution; Craig, J. M.; Klerks, P. L.; Heimann, K.; Waits, J. L. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1016/S0269-7491(03)00059-9 |
| Date Other: | Wed, 1 Jan 2003 00:00 -0600 |
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