EFFECT OF LIGHT INTENSITY ON THE CELL DENSITY, DIAMETER AND CELL VOLUME ZOOXANTHELLAE FROM ISOLATE SOFTCORAL ZOANTHUS SP
ABSTRACT: Coral reefs are one
of the aquatic ecosystem trophic productive for aquatic organisms. Coral reefs
can not be separated from the various threat of causing damage. Physiological
damage that is visible coral bleaching. Bleaching of coral reefs due to causes
it may be the biggest threat to coral ecosystems due to widespread in various
regions. Coral bleaching causing the loss of endosymbiont coral or reduction of
photosynthetic pigments zooxanthellae of corals. Zooxanthellae need light for
photosynthesis. The process will produce energy which serves for the
biosynthesis cell, growth and cell division. Therefore light plays an important
role in the process of photosynthesis. This research aims were to know the cell
density, diameter and volume zooxanthellae cells on different light intensity.
The research was conducted on July-August 2016, in the Aquaculture Laboratory,
Program Study of Aquaculture Faculty of Agriculture University of Lampung.
Observed parameters were the density, diameter and volume zooxanthellae cells.
Research used the 4 treatments and 5 replications namely 3800 lux (IC1), 6250
lux (IC2), 7980 lux (IC3), and 11800 lux (IC4). Measurement of the density and
diameter of zooxanthellae cells used a hemocytometer neubauer improved and
objective micrometer (0.01 mm). Data were analyzed by analysis of variance
(ANOVA) and followed by LSD test. The results showed that the intensity of
light significantly affected the density, diameter and volume zooxanthellae
cells. Intensity light given by zooxanthellae responded with increased density
and a decrease the diameter and volume zooxanthellae cells in the early stages
of culture (0-18 hours).
Keywords: Bleaching, algae,
light, photosyn-thesis
Penulis: Suliswati, Esti
Harpeni, Moh. Muhaemin
Kode Jurnal: jpperikanandd160178
