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Photosynthetic oxygen flux by Macrocystis pyrifera: a mass transfer model with experimental validation


Hansen, A and Hondzo, M and Hurd, CL, Photosynthetic oxygen flux by Macrocystis pyrifera: a mass transfer model with experimental validation, Marine Ecology Progress Series, 434 pp. 45-55. ISSN 0171-8630 (2011) [Refereed Article]

Copyright Statement

Copyright 2011 Inter-Research

DOI: doi:10.3354/meps09196


The present paper elaborates the development of a mass transfer model to determine rates of photosynthetic oxygen flux from the giant kelp Macrocystis pyrifera in a moving fluid. The model can be used to calculate local dissolved oxygen flux, blade-averaged oxygen flux and daily average net primary productivity for a kelp forest. Predicted rates of photosynthetic oxygen flux agree well with previously reported direct measurements. This model was derived from the fundamental principles of conservation of mass and momentum over a flat plate using an integral method approach and is applicable in laminar, transitional and turbulent flows. It predicts oxygen flux as an explicit function of fluid flow conditions above the kelp blade. Experimental velocity profiles and dissolved oxygen concentration profiles, measured under a range of fluid flow conditions, followed power-law scaling and demonstrated local similarity between oxygen and velocity distribution within the boundary layers above the kelp blade. The proposed model provides a useful tool for estimating rates of photosynthesis with minimal data collection.

Item Details

Item Type:Refereed Article
Keywords:photosynthesis, primary production, model, mass transfer
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Phycology (incl. marine grasses)
Objective Division:Environmental Policy, Climate Change and Natural Hazards
Objective Group:Adaptation to climate change
Objective Field:Ecosystem adaptation to climate change
UTAS Author:Hurd, CL (Professor Catriona Hurd)
ID Code:91469
Year Published:2011
Web of Science® Times Cited:8
Deposited By:IMAS Research and Education Centre
Deposited On:2014-05-20
Last Modified:2014-11-24

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