In contrast, carbon specific B12 utilization by the 2–
20 mm size classes was 40% lower in the bloom than non-bloom
water while there was significantly higher carbon-specific B12
utilization in the >20 mm size fraction (58% higher; p < 0.01;
Fig. 7C). Mean vitamin B1 turnover times were similar for non-bloom
and bloom samples (5.86 0.62 and 4.99 0.80 d, respectively)
while vitamin B12 was cycled seven-fold faster inside the bloom
(1.53 0.22 d) compared to non-bloom samples (10.3 1.35 d). On 9
August, 2 September, and 7 September of 2010 uptake of B12 was high
enough to deplete the ambient vitamin pool in 0.32, 0.72, and 0.87
days, respectively (Figs. 2 and 6C).
In contrast, carbon specific B12 utilization by the 2–20 mm size classes was 40% lower in the bloom than non-bloomwater while there was significantly higher carbon-specific B12utilization in the >20 mm size fraction (58% higher; p < 0.01;Fig. 7C). Mean vitamin B1 turnover times were similar for non-bloomand bloom samples (5.86 0.62 and 4.99 0.80 d, respectively)while vitamin B12 was cycled seven-fold faster inside the bloom(1.53 0.22 d) compared to non-bloom samples (10.3 1.35 d). On 9August, 2 September, and 7 September of 2010 uptake of B12 was highenough to deplete the ambient vitamin pool in 0.32, 0.72, and 0.87days, respectively (Figs. 2 and 6C).
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