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29/1 Date

29/1 Date

Fig. 4 The time course of the Kendall's correlation coefficient s, estimated between the 100 simultaneous measurements of chlorophyll concentrations and seawater viscosity at each sampling date. The open and black diamonds represent significant (P < 0.05) and nonsignificant Kendall's s, and the open dots the two correlation patterns observed on May 10 (see Fig. 2). The grey bar indicates the period of foam formation (May 3 to June 10). The sampling conducted on 26 September has been used as a separate reference sample, characteristic of non-bloom conditions positively correlated, and (ii) a release of large TEP from the mucilaginous matrix of P. globosa colonies subsequent to colony disruption (caused by nutrient depletion) where TEP and chlorophyll a concentration were negatively correlated. The causes of colony disruption observed by Mari et al. (2005) and the area described in the present work might diverge. The similarity between the dynamics of chlorophyll a concentration-excess viscosity shown in the present work and chlorophyll a concentration-TEP concen-

3ffl0 5/12

3ffl0 5/12

J 100

I 50

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