Phaeocystis, major link in the biogeochemical cycling of by M.A. van Leeuwe, J. Stefels, S. Belviso, C. Lancelot, P.G.

By M.A. van Leeuwe, J. Stefels, S. Belviso, C. Lancelot, P.G. Verity, W.W.C. Gieskes

The ubiquitous marine microalgal species Phaeocystis performs an immense position in biogeochemical cycles. Phaeocystis has a sophisticated existence cycle, which makes it not easy to decipher the position of this organism in atmosphere dynamics and for this reason its position in elemental cycles. This quantity bargains a range of papers which were awarded on the ultimate assembly of operating workforce # a hundred and twenty ''Phaeocystis, significant hyperlink within the biogeochemical biking of climate-relevant elements'', of the medical Committee on Oceanic study (SCOR). the combo of a various but good chosen spectrum of clinical disciplines – various from phylogeny to microbiogeochemistry and ecological modeling – makes this a really whole quantity; it's going to without doubt develop into a massive connection with all these operating with Phaeocystis. This e-book includes very important overview papers by means of a variety of best authors within the box. subject matters which are addressed achieve from the organism point (taxonomy and existence cycles) to atmosphere dynamics (interaction with viruses and grazing dynamics). The function of Phaeocystis in carbon biking is concentration of assorted chapters, in addition to its function in sulphur biking. The final treatise of this quantity includes a synthesis of all of the shows of the assembly. This bankruptcy highlights the main appropriate insights which were received to this point and defines pressing questions that have to be addressed in destiny examine.

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1992). The ecology of P. globosa morphotypes Many tentative hypotheses have been proposed to understand the dominance, alternation and succession of P. , nanoplanktonic cells and large gelatinous colonies 41 (Lancelot and Rousseau 1994; Lancelot et al. 2002; Verity and Medlin 2003). In general, these studies conclude an advantageous status accrues to the colonial stage over free-living cells due to higher growth characteristics and resistance to losses. The success of P. globosa colonies during blooms has been related to the peculiar physiology and ecology of the gelatinous colonies (Lancelot and Rousseau 1994; Lancelot et al.

Lagerheim and Phaeocystis globosa ScherVel I. Colony shapes and temperature tolerances. Hydrobiol Bull 21:141– 147 Jahnke J (1989) The light and temperature dependence of growth rate and elemental composition of Phaeocystis globosa ScherVel and P. ) Lagerh. in batch cultures. Neth J Sea Res 23:15–21 John U, Groben R, Beszteri B, Medlin LK (2004) Utility of AmpliWed Fragment Length Polymorphisms (AFLP) to analyse genetic structures within the Al- 13 exandrium tamarense species complex. Protist 155:169–179 Karsten G (1905) Das Phytoplankton des Antarktischen Meeres nach dem Material der deutschen TiefseeExpedition 1898–1899.

Whipple Skidaway Institute of Oceanography, 10 Ocean Science Circle, Savannah, GA, 31411, USA scaly Xagellate producing star-forming Wlaments (all species except P. jahnii) or not (P. globosa and P. jahnii). In three colony-forming species, P. globosa, P. pouchetii and P. antarctica, three morphotypes are observed: a Xagellate with scales and Wlaments, a colonial cell, and a Xagellate devoid of scales and Wlaments. In the non-colonyforming species, P. scrobiculata and P. cordata, only Xagellates with scales and Wlaments have been observed.

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