Re: Rule for Reproduction Rate?

From: Tom Hendricks (tomhendricks474_at_cs.com)
Date: 03/15/05 

Date: Tue, 15 Mar 2005 01:08:25 -0500 (EST)

IRR wrote:
> "Tom Hendricks" <tomhendricks474@cs.com> wrote in message
> news:d0tu03$284d$1@darwin.ediacara.org...
> > IRR wrote:
> >> <TomHendricks474@cs.com> wrote in message
> >> news:d0e4v1$5ki$1@darwin.ediacara.org...
> >> > Does anyone know of a rule for reproduction rate
> >> > that says that replication speeds up with environmental
> >> > temperatures?
> >>
> >> Despite what you might try to extrapolate from enzyme kinetics,
there
> > is no
> >> such 'rule' in a strict sense, only organism-specific local maxima
> > along
> >> temperature gradients mostly reflecting niche adaptation. In
other
> > words,
> >> organisms (particularly prokaryotes) replicate fastest at the
> > temperature
> >> they're adapted to, and there's no global trend corresponding to
> >> temperature. In fact, some of the most prolific hyperthermophiles
> > yet
> >> discovered (e.g. Lidy hot springs) are among the slowest growing
> > organisms
> >> known.
> >
> > There may be more to this. Are you talking about anhydrobiosis?
> > That would not be an exception to the rule, because that is a
reaction
> > to lack of water which would be the major cause of slow replication
> > rates.
> >
> > And remember I had the caveat of saying ' all other things being
> > similar' - and
> > lack of water would not be similar - it would be a major
difference.
> >
> > In general I would ask if you know of any
> > thermophiles living in the liquid water range,
> > that reproduce more slowly (all other necessities to
> > life being the same) than say bacteria surviving in the coldest
> > environments
> > in the liquid water range.
> >
> > Tom
>
> As 'spring' in Lidy hot spring implies, these are liquid water
communities.

So, to clarify, you are saying these hyperthermophiles reproduce slower
than the bacteria
in my refrigerator? Could you give a specific ex.? Thanks
Tom