1. Padjadjaran
University
Bandung - Indonesia
• Phytoplankton and water sample were taken weekly at four chosen
stations with different crowd levels of FCA
• Phytoplankton data was analyzed by calculating the abundance,
Simpson’s dominance index, Simpson’s diversity index and Sorenson
similiarity coeficient. Ordination technique was used in order to see if
there is a correlation between diversity index and different of crowd
levels of FCA in each stations.
Organic input
materials from fish
feed residue, fecal
pellets and
metabolism
Decomposition
Aerobic
(NO3, PO4)
Anaerobic
(CH4, H2S)
Changes in physical
and chemical in
water reservoir
Changes in
community
structure of
Phytoplankton
Fig. 1. Scheme of the problem approach
There is a positive correlation between the density FCA with abundance
of phytoplankton in Djuanda reservoir. However, increasing density of
FCA causes a decrease of diversity index of phytoplankton
Further studies to determine the location, density, size or determining
the amount of FCA based on the movement of water and bio-
decomposition of bio-organic matter and also to study the carrying
capacity the reservoir, especially related to sustainable aquaculture
Fiddy Semba Prasetiya
Faculty of Science and Bio-engineering, ICP Ecological Marine Management
Vrije Universiteit Brussel, Campus Etterbeek, Pleinlaan 2, 1050 Elsene – Brussels, Belgium
mail to: fsembapr@vub.ac.be Tel: +32485833827
Fig. 2. Map of Djuanda reservoir. Numbers represent the sampling sites where
both of water and phytoplankton samples were taken
0.96%
2.08%
96.80%
0.16%
0%
Bacillariophyceae
Chlorophyceae
Cyanophyceae
Dinophyceae
Euglenophyceae
0.96%
2.08%
96.80%
0.16%
0%
Bacillariophyceae
Chlorophyceae
Cyanophyceae
Dinophyceae
Euglenophyceae
• 4 classes with 18 genera of
phytoplankton were found
Bacillariophyceae (5 genus),
Chlorophyceae (8 genus),
Cyanophyceae (3 genus), &
Dinophyceae (2 genus) (Fig.
3)
Fig. 3. Percentage of phytoplankton based on the class
form Djuanda reservoir
• Microcystis sp. has the
abundance of 4428 ind/L
• Highest abundance of
phytoplankton was found in
station IV (Fig. 4)
Fig. 4 Abundancy of phytoplankton (individu/L) at 4 different sampling stations
• Relationship between
different crowd levels of
FCA were found with
correlation coefficient value
of – 0.835
• Relationship between
different crowd levels of
FCA were found with
correlation coefficient value
of – 0.835
The Effect of fish cage aquaculture
on the community structure of phytoplankton
in Djuanda reservoir, West Java – Indonesia