Hi! First correct the spelling it is "psychrophilic".

check the following literature you get some useful information.

http://www.montana.edu/priscu/DOCS/Publications/MorganKissEtAlChlorella2008.pdf

http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20100002095.pdf

http://mcm.lternet.edu/reports/lakes/PockockEtAl2004GreenAlga.pdf

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC440686/pdf/plntphys00527-0066.pdf

http://www2.ulg.ac.be/biochlab/pdf/pub/cmls_2003.pdf

Jetty,

First, thank you for your input as I look forward to reading the text.

Second, RG Administrator rewrote the "question" and performed the incorrect spelling as well as omission of the term "freshwater".

Jon