Comparative studies on phosphorus uptake and growth kinetics of the microalga Tetraselmis subcordiformis and the macroalga Ulva pertusa |
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| Authors: | Nan Chunrong and Dong Shuanglin |
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| Institution: | (1) Aquaculture Research Laboratory, Ocean University of China, 266003 Qingdao, P.R.China;(2) Marine Biology Institute, Science Center, Shantou University, 515063 Shantou, P.R.China |
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| Abstract: | Short-term uptake experiments and long-term semicontinuous culture experiments were performed under the condition of phosphorus
(P) limitation to estimate and compare the P uptake and growth kinetics of the microalga Tetraselmis subcordiformis and the macroalga Ulva pertusa. Two new parameters, the maximum specific uptake rate (V
m
sp
) and the maximal growth efficiency (β), are introduced to achieve uniformity for the comparison of nutrient uptake and growth
efficiency between microalgae and macroalgae. T. subcordiformis possesses 3 times lower half saturation uptake constant, 4 times higher maximal growth rate and 20 times higher maximum specific
uptake rate than U. pertusa, while U. pertusa possesses 4 times higher maximal growth efficiency than T. subcordiformis. |
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| Keywords: | Ulva pertusa Tetraselmis subcordiformis phosphorus kinetics maximum specific uptake rate maximal growth efficiency |
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