Adaptations to hot and cold Deep sea hydrothermal vents Hostile Hostile environment environment • Steep and Steep and variable variable thermal thermal gradients gradients • metabolic metabolic toxins toxins - H 2 S, S, elevated elevated CO CO 2 , heavy , heavy metals metals Alvinella pompejana 60-80 C? Thermal tolerance
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Deep sea hydrothermal vents Adaptations to hot and coldrlee/ocean/ventthermal.pdfAdaptations to hot and cold Deep sea hydrothermal vents Hostile environment • Steep and variable
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Adaptations to hot and cold
Deep sea hydrothermal vents
Hostile Hostile
environmentenvironment•• Steep and Steep and
variable variable
thermal thermal
gradientsgradients
•• metabolic metabolic
toxins toxins --
HH22S, S,
elevated elevated
COCO22, heavy , heavy
metalsmetals
Alvinella pompejana 60-80 C?
Thermal tolerance
High pressure systemHigh pressure system
Investigate temperature and sulfide tolerance
• P. sulfincola type I&II
• P. palmiformis type II, III
• L. fucensis, D. globulus type II,III, IV&V
D. globulus and P. palmiformis
P. sulfincola 42-43 degrees C P. sulfincola at 50-52 degrees C
P. sulfincola
P. palmiformis
D. globulus
L. fucensis
10 20 30 40 50 60
degrees Celsius
1. active 2. reduced activity
3. active/not active after 4. not active
Effects of experimental temperature on activity of chimney macrofauna. Each data point represents an observation of a single chamber from one temperature experiment. Behavior was categorized as follows: (1) Activity at experimental temperature with continued activity following return to low temperatures, (2) obvious reduction or cessation of activity with restoration of activity following return to low temperatures, (3) activity at experimental temperature but cessation of activity at higher temperatures and/or no activity after return to low temperature, or (4) no activity with no return of activity at lower temperatures.
Lee, 2003
Enzyme thermal stability
Rinke and Lee 2008
Can we be sure that 55 C is the thermal maximum for P.