Effects of trichlorobenzene on natural phytoplankton populations

✍ Scribed by N. A. Andresen; L. Sicko-Goad

• Publisher: Springer
• Year: 1993
• Tongue: English
• Weight: 762 KB
• Volume: 2
• Category: Article
• ISSN: 0963-9292
• DOI: 10.1007/bf00368534

✦ Synopsis

Natural phytoplankton assemblages from an offshore station in Lake Michigan were exposed to individual isomers of trichlorobenzene (TCB) and incubated in situ for a 24 h period. One set of exposures was initiated with a lake assemblage collected at 0330 h from 30 m and the TCB isomers added at 0400 h. The second exposure experiment was initiated with an assemblage from 30 m collected at 1530 h and the TCB isomers added at 1600 h.

Comparisons of the chlorophyll a to neutral lipid ratio and the neutral to polar lipid ratios suggest that 1,2,3-TCB is more toxic than 1,2,4-TCB. Furthermore, more effects were observed when exposures were initiated at 0400 h when compared with a parallel experiment initiated at 1600 h. These studies with natural assemblages support culture studies of effect as a function of time of exposure.