Abstract:
This research has aims to know Estuary fecundity zoom Rokan's River is
sighted from nitrate concentration, phosphate, and profusion at diatom and
relationship among concentrates nitrate, phosphate with profusion at diatom.the
research was performed on 16th June 2012 at River Estuary waters Rokan,
Sinaboy's district Rokan's regency Riau's province Downstream. These result
points out that nitrate concentration on basic station sampling at 0,027 0,032 mg /
L. Meanwhile phosphate concentration on each ranging station 0,875 – 0,916 mg /
L. base on the research station is found 27 specieses at diatom, species at diatom
that often emerges at each station is Skeletonema Costatum. This species gets
character euryhaline andeurythermal.
Concentration nitrate the River Estuary waters Rokan categorised lush
reducing waters (oligotropik)meanwhile for phosphate concentration comprises
(mesotropik). According to subjective research result nitrate concentration with
profusion at diatom while blows over to be gotten can r =0,84 and while assemble
to be can r=0,34. Meanwhile for relationship among phosphate concentration with
profusion at diatom upon subsiding being gottencan r=0,58 and at the moment
tide are gotten assesses canr=0,25 subjective matternitrate concentration with
profusion at diatom upon subsiding categorised strong and at the moment rank
tide rans down meanwhile for phosphate concentration with profusion at diatom
upon subsiding categorised be and at the moment rank tide rans down.
