FN Archimer Export Format PT CHAP TI Ecophysiology of phyto- and bacterioplankton growth in the Prydz Bay area during the Austral summer 1987: Part I :modelling phytoplankton growth BT Proceedings of the Belgian National Colloquium on Antarctic Research (Brussels, October 20, 1987). pp. 133-146 AF Billen, Gilles Lancelot, Christiane Mathots, Sylvie AS 1:1;2:1;3:1; FF 1:;2:;3:; C1 Université Libre de Bruxelles Groupe de Microbiologie des Milieux Aquatiques Campus de la Plaine, CP 221, Boulevard du Triomphe - 1050 Bruxelles Belgium C2 UNIV LIBRE BRUXELLES, BELGIQUE UR https://archimer.ifremer.fr/doc/00767/87877/93472.pdf LA English DT Book section DE ;Heterotrophic bacteria;growth rates;thymidine incorporation;Southern Ocean;Prydz Bay. AB In order to assess the quantitative role of heterotrophic bacterial activity in the cycling of primary produced organic matter, measurements of bacterial biomass, growth and mortality rates were carried out in the Prydz Bay area in February - March 1987. These measurements, along with data from other authors collected in the same area allow to reconcile contradictory opinions published in the literature concerning the significance of the microbial loop in the Antarctic ecosystem in comparizon with temperate marine systems : (i) A similar significant part of primary production is utilized by planktonic heterotrophic bacteria. (ii) A much longer delay in the response of bacteria to phytoplankton development exists in Antarctica. These results are discussed in the light of the ecological structure of the Antarctic Fcosystem PY 1988 ID 87877 ER EF