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IJMS Vol.30(4) [December 2001] >


Title: Photosynthesis of seagrass Cymodocea serrulata (Magnoliophyta/ Potamogetonales/Cymodoceaceae) in field and laboratory
Authors: Hena, M K Abu
Misri, K
Sidik, B Japar
Hishamuddin, O
Hidir, H
Issue Date: Dec-2001
Publisher: CSIR
Abstract: In situ photosynthetic study for seagrass Cymodocea serrulata at two depths (0.5 m, 2.0 m) at Port Dickson, Negeri Sembilan was conducted. The photosynthetic rate at 0.5 m was comparatively higher (0.476±0.080 mg O2/hr/g fr wt or 0.571±0.182 mg O2/hr/cm2) than at 2.0 m depth (0.292±0.030 mg O2/hr/g fr wt or 0.426±0.135 mg O2/hr/cm2). Respiration rate was not significantly difference at the two depths. Laboratory study showed that the rate of photosynthesis varied with light intensity, exhibiting saturation at 200-800 mmol/m2/sec with a light compensation point at 20-40 mmol/m2/sec. The in situ light measurement recorded at 2.0 m depth was 108.33±9.18 mmol/m2/sec, which is comparatively higher than those at compensation light point, which suggests that this seagrass may inhabit the depth more than 2.0 m. However, based on field observation, this seagrass was only found at depth of 1.5-2.0 m HWL.
Page(s): 253-256
ISSN: 0975-1033 (Online); 0379-5136 (Print)
Source:IJMS Vol.30(4) [December 2001]

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