Accession Number : AD0738885

Title :   Research on and Culture of Calcareous Green Algae.

Descriptive Note : Final rept. 1 Mar 67-31 Dec 70,

Corporate Author : OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS

Personal Author(s) : Hillis-Colinvaux,Llewellya

Report Date : 11 FEB 1972

Pagination or Media Count : 30

Abstract : Four genera of coral reef Siphonales, Halimeda, Penicillus, Rhipocephalus and Udotea were grown in laboratory aquaria under light intensities of 650, 200-375 and 125-200 ft-candles. The commercial preparation 'Instant Ocean' was tested for use with plants. Penicillin and Lindane were tested for their effect on epiphytes and other nuisances. The growth and development of all 4 genera from tiny protuberances above the sand to white, dying and disintegrating was followed. All produced new individuals from rhizoidal-like filaments that extended outwards through the sand from the holdfast of an older plant. I demonstrated how vegetative reproduction might occur with partial burying of individuals by shifting sands in a reef, or from portions of plant broken off by grazing or other natural activities. Plants produced vegetatively are not initially epiphytized and so may be a source of clean plants for laboratory experiment. Insight into the role of calcareous plants in a reef was obtained by a productivity study which combined a census of such plants in a reef and a laboratory measure of oxygen changes in an entire aquarium. (Author)

Descriptors :   (*ALGAE, *MARINE BIOLOGY), (*CORAL REEFS, ALGAE), GROWTH(PHYSIOLOGY), REPRODUCTION(PHYSIOLOGY), ECOLOGY, CALCIFICATION, PLANTS(BOTANY), LABORATORIES

Subject Categories : Anatomy and Physiology
      Biological Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE