Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 404135
Title Modification of light utilization for skeletal growth by water flow in the scleractinian coral Galaxea fascicularis
Author(s) Schutter, M.; Kranenbarg, S.; Wijffels, R.H.; Verreth, J.A.J.; Osinga, R.
Source Marine Biology 158 (2011)4. - ISSN 0025-3162 - p. 769 - 777.
DOI http://dx.doi.org/10.1007/s00227-010-1605-3
Department(s) Aquaculture and Fisheries
Experimental Zoology
Bioprocess Engineering
VLAG
WIAS
Publication type Refereed Article in a scientific journal
Publication year 2011
Keyword(s) reef coral - madracis-mirabilis - photosynthesis - calcification - oxygen - respiration - rates - temperatures - mechanisms - organisms
Abstract In this study, we tested the hypothesis that the importance of water flow for skeletal growth (rate) becomes higher with increasing irradiance levels (i.e. a synergistic effect) and that such effect is mediated by a water flow modulated effect on net photosynthesis. Four series of nine nubbins of G. fascicularis were grown at either high (600 µE m-2 s-1) or intermediate (300 µE m-2 s-1) irradiance in combination with either high (15–25 cm s-1) or low (5–10 cm s-1) flow. Growth was measured as buoyant weight and surface area. Photosynthetic rates were measured at each coral’s specific experimental irradiance and flow speed. Additionally, the instantaneous effect of water flow on net photosynthetic rate was determined in short-term incubations in a respirometric flowcell. A significant interaction was found between irradiance and water flow for the increase in buoyant weight, the increase in surface area, and specific skeletal growth rate, indicating that flow velocity becomes more important for coral growth with increasing irradiance levels. Enhancement of coral growth with increasing water flow can be explained by increased net photosynthetic rates. Additionally, the need for costly photo-protective mechanisms at low flow regimes could explain the differences in growth with flow.
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