In the southern regions where calcareous periphyton is the dominant primary producer, pigments typical of diatoms and chrysophytes dominate.
(calcareous periphyton; is; the dominant primary producer; L:the southern regions) (pigments typical of diatoms and chrysophytes; dominate; L:In the southern regions)
calcareous periphyton pigments typical of diatoms and chrysophytes
is dominate
the dominant primary producer L:the southern regions
L:In the southern regions