Iskopaemye izvestkovye vodorosli SSSR [Fossil calcareous algae
I became fascinated by calcareous algae
. Why would a plant that needs the sun make itself a coat of armour?
In this study, nineteen genera and twelve species of benthic foraminifera, one genus of planktic foraminifera, three genera and four species of calcareous algae
and Lingulogavelinella arnagerensis assemblage zone were identified.
Macro- and calcareous algae
abundance did not differ between reefs but high coralline algae abundance was measured in Shimoni compared to all other reefs.
Treatments involved the addition of a calcium source to the concentrate, either limestone (LI) (calcitic limestone, Iguatama, Brazil) or a product derived from calcareous algae
(CA) (Top buffer[R] Sanphar, Campinas, Brazil), with or without the presence of monensin (MO) (Bovensin[R] Phibro, Guarulhos, Brazil).
The functional groups were determined following Steneck & Dethier (1994): a) foliose algae, b) filamentous algae, c) corticated foliose algae, d) corticated algae, e) articulated calcareous algae
, and d) crustose algae.
Forms of green algae mainly calcified are recognized as skeletal calcareous algae
. They commonly exhibit segments of (dasycladacead algae, according to the classification of Wray, 1977) with honeycomb structure and walls commonly of fine grained fibrous calcite (Fig.
Coronado and Rodriguez (2009) recognized syringoporoid corals in the algal-mounds of Cosgaya Formation in Cantabria (Spain) where they occur associated with calcareous algae
, chaetetids and rugose corals.
Among bigger algal species, tough cement makers called crustose calcareous algae
help hold a reef together and create ridges that withstand pounding waves.