Saunders-Davies, A. 1995 Factors affecting the
distribution of benthic and littoral rotifers in
a large marine lagoon, together with a description
of a new species. Hydrobiologia, 313-314: 69-74.
A significant population of rotifers living in
the algae in the Fleet was investigated, including
a description of a potential new species Proales
fleetensis sp. nov. Measurements of salinity
(conductivity), air and water temperature, nitrogen
as nitrate and as ammonia were made at the time
of sampling for rotifers on algae. pH values were
high at the Abbotsbury end, probably due to photosynthesis
by seagrasses. pH was lower and less variable towards
Ferrybridge (8.3 to 8.9), possibly due to the buffering
effects of seawater. Salinity around Ferrybridge
was close to that of normal seawater (0.98 to 1.01
not given) and fairly constant. At Abbotsbury salinity
was lower and much more variable (0.17 to 0.65).
Nitrogen levels, both as nitrate and ammonia, were
generally low, but variable.
Rotifer species richness and total abundance increased
with decreasing salinity from Ferrybridge to Abbotsbury.
During the period of the survey (June to Sept 1993)
an explosive growth of the sulphur bacterium Thiopedia
roseola occurred at Morkham=s
Lake. At this time rotifers disappeared from the
benthic algae, which became covered in the bacterium,
but were abundant in the mats of filamentous algae
floating clear of the bottom.