Sedimentation rate and nutrients at coral reef of Talang-talang Island, Sematan, Sarawak
A study was conducted to determine the rate of sedimentation and nutrients at coral reef area in Talang-Talang Island from July 2011 to April 2012. The sedimentation rates were determined by setting up sedimentation traps at three selected stations and water samples were collected at four selected...
| Main Author: | |
|---|---|
| Format: | Final Year Project Report / IMRAD |
| Language: | English |
| Published: |
Universiti Malaysia Sarawak, UNIMAS
2012
|
| Subjects: | |
| Online Access: | http://ir.unimas.my/id/eprint/6254/ http://ir.unimas.my/id/eprint/6254/1/Lee%20Xue%20Li%20ft.pdf |
| Summary: | A study was conducted to determine the rate of sedimentation and nutrients at coral reef area in Talang-Talang
Island from July 2011 to April 2012. The sedimentation rates were determined by setting up sedimentation traps
at three selected stations and water samples were collected at four selected stations within the coral reef area. The
sediments collected were analysed to determine particle size while water samples were collected to analyse total
suspended solids (TSS) and nutrients. The mean sedimentation rates ranged from 5.35 - 13.95 mg/cm²/day in
November 2011 and from 77.78 - 136.27 mg/cm²/day in April 2012. The mean concentration of TSS ranged from
21.62±4.74 to 27.07±3.33 mg/l. Analysis on the composition of sediment shows that the percentage of sand
ranged from 24.61 to 52.79 %, silt ranged from 44.88 to 68.20 % and clay ranged from 2.33 to 24.67 %. Mean
concentration of orthophosphate, nitrate-N and ammonia-N ranged from 0.02 – 0.09 mg/l, 0.01 - 2.90 mg/l and
0.45 – 1.23 mg/l respectively. Sedimentation rates at Talang-Talang Island exceeded the natural sedimentation
rates especially at Station 2. High sedimentation rates and nutrients concentration were influenced by
environmental factors and human activities but they affected the growth, reproduction and metabolism of corals. |
|---|