Please use this identifier to cite or link to this item: https://doi.org/10.1071/MF19178
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dc.titleContribution of epiphyte load to light attenuation on seagrass leaves is small but critical in turbid waters
dc.contributor.authorOw, Yan Xiang
dc.contributor.authorNg, Kai Jun
dc.contributor.authorLai, Samantha
dc.contributor.authorYaakub, Siti Maryam
dc.contributor.authorTodd, Peter
dc.date.accessioned2022-07-27T02:40:35Z
dc.date.available2022-07-27T02:40:35Z
dc.date.issued2020-06-30
dc.identifier.citationOw, Yan Xiang, Ng, Kai Jun, Lai, Samantha, Yaakub, Siti Maryam, Todd, Peter (2020-06-30). Contribution of epiphyte load to light attenuation on seagrass leaves is small but critical in turbid waters. MARINE AND FRESHWATER RESEARCH 71 (8) : 929-934. ScholarBank@NUS Repository. https://doi.org/10.1071/MF19178
dc.identifier.issn13231650
dc.identifier.issn14486059
dc.identifier.urihttps://scholarbank.nus.edu.sg/handle/10635/229249
dc.description.abstractQuantifying contributors to light attenuation is useful for the management of seagrass meadows. Epiphytic growth on seagrasses can lead to diminished light for the host plant, impairing photosynthesis and growth. Here, we quantify the contributions of the water column and epiphytic load to light attenuation in a Cymodocea rotundata meadow at Chek Jawa, Singapore. Using a modified spectrometer and seagrass mimics (clear polyethene strips) colonised by epiphytes, we determined the relationship between light transmission (400-700 nm) and epiphyte load. Subsequently, we derived the percentage of surface light that reaches the leaf surface (PLL) over a range of epiphyte biomass and water-column light-attenuation coefficients (Kd). Results indicated that the relative contribution to light attenuation by epiphytic biomass was greater in clearer waters (Kd < 0.5) than in turbid waters. As Kd increases, the amount of epiphytic material required to reduce PLL to minimum light requirement (11%) decreases exponentially. At Chek Jawa, the average epiphytic load was 32 mg DW cm-2, which was close to the estimated amount (33 mg DW cm-2) required to reduce PLL to 11% at prevailing turbidity levels. Our findings suggest that high epiphyte load is benign in clear waters, but becomes critical in turbid waters.
dc.language.isoen
dc.publisherCSIRO PUBLISHING
dc.sourceElements
dc.subjectScience & Technology
dc.subjectLife Sciences & Biomedicine
dc.subjectPhysical Sciences
dc.subjectFisheries
dc.subjectLimnology
dc.subjectMarine & Freshwater Biology
dc.subjectOceanography
dc.subjectCymodocea rotundata
dc.subjectepiphytes
dc.subjectseagrass-leaf mimic
dc.subjectZOSTERA-MARINA L
dc.subjectQUALITY
dc.subjectBIOMASS
dc.subjectGROWTH
dc.subjectBAY
dc.subjectPRODUCTIVITY
dc.subjectFLORIDA
dc.subjectALGAE
dc.typeArticle
dc.date.updated2022-07-20T02:46:10Z
dc.contributor.departmentDEPT OF BIOLOGICAL SCIENCES
dc.contributor.departmentTROPICAL MARINE SCIENCE INSTITUTE
dc.description.doi10.1071/MF19178
dc.description.sourcetitleMARINE AND FRESHWATER RESEARCH
dc.description.volume71
dc.description.issue8
dc.description.page929-934
dc.published.statePublished
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