Nitrogenous nutrition of Alexandrium catenella (Dinophyceae) in cultures and in Thau lagoon, southern France
Nitrogenous nutrition of Alexandrium catenella (Dinophyceae) in cultures and in Thau lagoon, southern France
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DOI：
10.1046/j.1529-8817.2004.03034.x
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发表时间：
2004-02-01
影响因子：
2.9
通讯作者：
Souchu, P
中科院分区：
文献类型：
--
作者：
Collos, Y;Gagne, C;Souchu, P
链状亚历山大藻（Whedon等Kofoid）Balech是从陶泻湖（北方地中海）和它的生长和吸收特性测定硝酸盐，铵，尿素。虽然亲和常数并不表明铵的偏好超过硝酸盐，有一个强烈的抑制硝酸盐吸收铵时，两个氮（N）源存在。在文化的增长过程中的氮预算显示溶解氮的减少和颗粒氮的增加之间的主要不平衡，表明在生长阶段的早期和吸收的溶解有机氮的排泄在后期的部分。在2001年11月的一次准单藻水华（4 × 10（6）细胞.L-1）中，可以测量硝酸盐、亚硝酸盐、铵和尿素的吸收; catenella;和放牧率对这种生物。亲和常数表明，当氮素浓度较低时，它不是氮素的强竞争者（
Alexandrium catenella (Whedon et Kofoid) Balech was isolated from Thau lagoon (northern Mediterranean) and its growth and uptake characteristics measured for nitrate, ammonium, and urea. Although affinity constants did not indicate a preference for ammonium over nitrate, there was a strong inhibition of nitrate uptake by ammonium when both nitrogen (N) sources were present. Nitrogen budgets during growth in cultures revealed major imbalances between decreases in dissolved N and increases in particulate N, indicating excretion of dissolved organic N during the early part of the growth phase and uptake during the later part. A quasi-unialgal bloom in November 2001 (4x10(6) cells.L-1) allowed measurements of uptake of nitrate, nitrite, ammonium, and urea; net and gross growth rate of A. catenella; and grazing rates on this organism. The affinity constants indicate that it is not a strong competitor for the N nutrients tested when these are in low concentrations (