[sci.bio] Phosphorescent algae

rw@aiva.ed.ac.uk (Richard White) (07/29/88)

This is a re-posting. Our mail/news links have been flaky lately, so
I don't know if this got out, or if anyone responded. Pardon the
repetition if you have seen this before:-



One night last week some friends and I did a night dive in one 
of the Scottish sea lochs amongst an amazing display of 
phosphorescence. I have been told that this is due to the presence of
phosphorescent algae in the water. This prompted the following questions:

How do the algae phosphoresce? They only seem to glow when the water is 
agitated.

Why do they do it? Is there an evolutionary advantage in doing so?

Do they phosphoresce all the time or just when it is dark?

Hopefully someone in sci.bio-land can shed some light on this (pun
intended :-)

Thanks 

Richard White,				JANET: R.White@uk.ac.edinburgh
Department of Artificial Intelligence,  ARPA: R.White%uk.ac.ed@nss.ucl.ac.uk
University of Edinburgh			UUCP: ...!ukc!ed.ac.uk!R.White