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demographic data needed: Vallisneria americana

RAMAS ramas at
Tue Mar 19 09:05:03 EST 1996

I'm building a structured population model for Vallisneria
americana (American wild celery, a submerged aquatic macrophyte) 
and I'm interested in including
the effects of temporal variation in vital rates.  If anyone knows
where I could find the following information, I'd be very grateful:

Measures of variation (e.g. temporal coefficient of variation, means for
two or more successive years at the same site) for:
number of rosettes per plant
number of winter buds per plant/per rosette
winter bud survival
shoot establishment from winter buds

Either for V. americana or even for related species e.g. V. spiralis.  But
I have a deadline of end of March 96.  Thanks for taking the time to read

Matt Spencer,
Applied Biomathematics,
100 North Country Road,
NY 11733,

phone (516)751-4350
fax (516)751-3435
email ramas at gramercy.ios.com

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