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High Temperature Decreases the Pic / Poc Ratio and Increases Phosphorus Requirements in Coccolithus Pelagicus (Haptophyta) : Volume 11, Issue 1 (16/01/2014)

By Gerecht, A. C.

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Book Id: WPLBN0004004598
Format Type: PDF Article :
File Size: Pages 31
Reproduction Date: 2015

Title: High Temperature Decreases the Pic / Poc Ratio and Increases Phosphorus Requirements in Coccolithus Pelagicus (Haptophyta) : Volume 11, Issue 1 (16/01/2014)  
Author: Gerecht, A. C.
Volume: Vol. 11, Issue 1
Language: English
Subject: Science, Biogeosciences, Discussions
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2014
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Henderiks, J., Gerecht, A. C., Probert, I., Edvardsen, B., & Šupraha, L. (2014). High Temperature Decreases the Pic / Poc Ratio and Increases Phosphorus Requirements in Coccolithus Pelagicus (Haptophyta) : Volume 11, Issue 1 (16/01/2014). Retrieved from http://www.ebooklibrary.org/


Description
Description: CEES, Dept. of Biosciences, University of Oslo, P.O. Box 1066 Blindern, 0316 Oslo, Norway. Rising ocean temperatures will likely increase stratification of the water column and reduce nutrient input into the photic zone. This will increase the likelihood of nutrient limitation in marine microalgae, leading to changes in the abundance and composition of phytoplankton communities, which in turn will affect global biogeochemical cycles. Calcifying algae, such as coccolithophores, influence the carbon cycle by fixing CO2 into particulate organic carbon (POC) through photosynthesis and into particulate inorganic carbon (PIC) through calcification. As calcification produces a net release of CO2, the ratio of PIC / POC determines whether coccolithophores act as a source (PIC / POC > 1) or a sink (PIC / POC < 1) of atmospheric CO2. We studied the effect of phosphorus (P-) limitation and temperature stress on the physiology and PIC / POC ratios of two subspecies of Coccolithus pelagicus. This large and heavily calcified species (PIC / POC generally > 1.5) is a major contributor to calcite export from the photic zone into deep-sea reservoirs. Phosphorus limitation did not influence exponential growth rates in either subspecies, but P-limited cells had significantly lower cellular P-content. A 5 °C temperature increase did not affect exponential growth rates either, but nearly doubled cellular P-content under both high and low phosphate availability. The PIC / POC ratios did not differ between P-limited and nutrient-replete cultures, but at elevated temperature (from 10 to 15 °C) PIC / POC ratios decreased by 40–60%. Our results suggest that elevated temperature may intensify P-limitation due to a higher P-requirement to maintain growth and POC production rates, possibly reducing abundances in a warmer ocean. Under such a scenario C. pelagicus may decrease its calcification rate relative to photosynthesis, resulting in PIC / POC ratios < 1 and favouring CO2-sequestration over release. Phosphorus limitation by itself is unlikely to cause changes in the PIC / POC ratio in this species.

Summary
High temperature decreases the PIC / POC ratio and increases phosphorus requirements in Coccolithus pelagicus (Haptophyta)

Excerpt
Archer, D.: Modeling the calcite lysocline, J. Geophys. Res., 96, 17037–17050, 1991.; Armstrong, R. A., Lee, C., Hedges, J. I., Honjo, S., and Wakeham, S. G.: A new, mechanistic model for organic carbon fluxes in the ocean based on the quantitative association of POC with ballast minerals, Deep-Sea Res. Pt. II, 49, 219–236, 2002.; Balch, W. M., Holligan, P. M., and Ackleson, S. G.: Biological and optical properties of mesoscale coccolithophore blooms in the Gulf of Maine, Limnol. Oceanogr., 36, 629–643, 1991.; Balch, W. M., Kilpatrick, K. A., and Holligan, P. M.: Coccolith production and detachment by Emiliania huxleyi (Prymnesiophyceae), J. Phycol., 29, 566–575, 1993.; Barnard, R., Batten, S. D., Beaugrand, G., Buckland, C., Conway, D. V. P., Edwards, M., Finlayson, J., Gregory, L. W., Halliday, N. C., John, A. W. G., Johns, D. G., Johnson, A. D., Jonas, T. D., Lindley, J. A., Nyman, J., Pritchard, P., Reid, P. C., Richardson, A. J., Saxby, R. E., Sidey, J., Smith, M. A., Stevens, D. P., Taylor, C. M., Tranter, P. R. G., Walne, A. W., Wootton, M., Wotton, C. O. M., and Wright, J. C.: Continuous plankton records: Plankton atlas of the North Atlantic Ocean (1958–1999), II. Biogeographical charts, Mar. Ecol.-Prog. Ser., Supplement, 11–75, 2004.; Beardall, J. and Raven, J. A.: The potential effects of global climate change on microalgal photosynthesis, growth and ecology, Phycologia, 43, 26–40, 2004.; Baumann, K.-H., Young, J. R., Cachão, M., and Ziveri, P.: Biometric study of Coccolithus pelagicus and its palaeoenvironmental utility, J. Nannoplankton Res., 22, p. 82, 2000.; Beaufort, L.: Weight estimates of coccoliths using the optical properties (birefringence) of calcite, Micropaleontology, 51, 289–297, 2005.; Beaufort, L. and Heussner, S.: Coccolithophorids on the continental slope of the Bay of Biscay – production, transport and contribution to mass fluxes, Deep-Sea Res. Pt. II, 46, 2147–2174, 1999.; Beaufort, L., Barbarin, N., and Gally, Y.: Protocol for optical measurements of calcite crystal thickness and mass of thin ($< 4.5$ \mum) carbonate particles such as coccoliths, Nat. Protoc., in press, 2014.; Broerse, A. T. C., Ziveri, P., and Honjo, S.: Coccolithophore (-CaCO3) flux in the Sea of Okhotsk: seasonality, settling and alteration processes, Mar. Micropaleontol., 39, 179–200, 2000.; Buitenhuis, E. T., van Bleijswijk, J., Bakker, D., and Veldhuis, M.: Trends in inorganic and organic carbon in a bloom of Emiliania huxleyi in the North Sea, Mar. Ecol.-Prog. Ser., 143, 271–282, 1996.; Buitenhuis, E. T., Pangerc, T., Franklin, D. J., Le Quere, C., Malin, G.: Growth rates of six coccolithophorid strains as a function of temperature, Limnol. Oceanogr., 53, 1181–1185, 2008.; Båtvik, H., Heimdal, B. R., Fagerbakke, K. M., and Green, J. C.: Effects of unbalanced nutrient regime on coccolith morphology and size in Emiliania huxleyi (Prymnesiophyceae), Eur. J. Phycol., 32, 155–165, 1997.; Cachão, M. and Moita, M. T.: Coccolithus pelagicus, a productivity proxy related to moderate fronts off Western Iberia, Mar. Micropaleontol., 39, 131–155, 2000.; Cubillos, J. C., Henderiks, J., Beaufort, L., Howard, W. R., and Hallegraeff, G. M.: Reconstructing calcification in ancient coccolithophores: Individual coccolith weight and morphology of Coccolithus pelagicus (sensu lato), Mar. Micropaleontol., 92–93, 29–39, 2012.; Feng, Y., Warner, M. E., Zhang, Y., Sun, J., Fu, F.-X., Rose, J. M., and Hutchins, D. A.: Interactive effects of increased pCO2, temperature and irradiance on the marine coccolithophore Emiliania huxleyi (Prymnesiophyceae), Eur. J. Phycol., 43, 87–98, 2008.; Fernández, E., Boyd, P., Holligan, P. M., and Harbour, D. S.: Production of organic and inorganic carbon within a large-scale coccolithophore bl

 

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