<te- 3. mynd. Taumar af Chloroflexus í H2S-ríkum vatnshver á háhitasvæði. - Streamers of Chloroflexus in a sulfide-containing, alkaline hot spring. (Mynd/photo Jakob K. Krist- jánsson) 10 20 VEGALENGD. METRAR 4. mynd. Áhrif hitastigs (O) og brennisteinsvetnis (H2S) () á hlutfall karotena og blaðgrænu (A) í H2S-ríkum vatnshver. - The effect of temperature (O) and sulfide (%) on ratio of carotenoids and chlorophyll (A) in a sulf- ide-containing, alkaline hot spring. 56