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Title: Photosynthesis of seagrass <i style="">Cymodocea serrulata</i> (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: <i style="">In situ</i> photosynthetic study for seagrass <i style="">Cymodocea serrulata</i> 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 O<sub>2</sub>/hr/g fr wt or 0.571±0.182 mg O<sub>2</sub>/hr/cm2) than at 2.0 m depth (0.292±0.030 mg O<sub>2</sub>/hr/g fr wt or 0.426±0.135 mg O<sub>2</sub>/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 <i style="">in situ</i> 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.
Description: 253-256
ISSN: 0975-1033 (Online); 0379-5136 (Print)
Appears in Collections:IJMS Vol.30(4) [December 2001]

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