The values observed for 021N Eikelboom's type, in
Camarma plant were higher than the values for Boadilla
and Las Matas-PenÄascales plants, but they were between
the scant and rare categories.
The seasonal variance was only signi®cant with Beggiatoa
ssp. This microorganisms was abundant during
spring, summer, and autumn, and decreased to rare in
winter