Physiological state of microbial communities and mats of the bottom sediments in the marine shallow-water hydrothermal ecosystem of Kraternaya Bight (Kurile Islands)

• Published in: Russian journal of marine biology Vol. 35; no. 4; pp. 323 - 330
• Main Authors: Kharlamenko, V. I, Imbs, A. B, Tarasov, V. G
• Format: Journal Article
• Language: English
• Published: Dordrecht Dordrecht : SP MAIK Nauka/Interperiodica 01.07.2009; SP MAIK Nauka/Interperiodica
• Subjects: Biomedical and Life Sciences; Ecology; Freshwater & Marine Ecology; Life Sciences; lipid markers; Marine; microbial communities; shallow-water hydrothermal ecosystem; stress; INW, Russia, Sakhalinskaya, Kurilskiye Is., Ushishir Is., Yankicha I., Kraternaya Bight; stress; microbial communities; shallow-water hydrothermal ecosystem; lipid markers
• ISSN: 1063-0740; 1608-3377
• DOI: 10.1134/S1063074009040075

The physiological state of littoral and sublittoral microbial communities in a marine shallow-water hydrothermal ecosystem (Kraternaya Bight) was studied using lipid biomarkers. The ratio trans/cis (n-7) isomers of monoenic fatty acids (FAs) of polar lipids in intertidal and subtidal algobacterial and bacterial mats of the bight exceeded 0.1 significantly; this indicated a stress state in bacteria. No concomitant increase was found in the ratio of cyclopropane fatty acids to 16: 1 and 18: 1 (n-7) cis monoenic fatty acids. In bottom sediments, the ratio trans/cis (n-7) isomers of monoenic fatty acids was below 0.1. A positive correlation (r = 0.71) was revealed between the ratio trans/cis isomers of (n-7) monoenic fatty acids and the content of saturated fatty acids.