Nitrogen form, concentration, and micronutrient availability affect microcystin production in cyanobacterial blooms.
Nitrogen form, concentration, and micronutrient availability affect microcystin production in cyanobacterial blooms.
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氮的形态、浓度和微量营养素的有效性影响蓝藻水华中微囊藻毒素的产生。
DOI：
10.1016/j.hal.2021.102002
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发表时间：
2021-03
期刊：
影响因子：
6.6
通讯作者：
Scott JT
中科院分区：
文献类型：
--
作者：
Wagner ND;Quach E;Buscho S;Ricciardelli A;Kannan A;Naung SW;Phillip G;Sheppard B;Ferguson L;Allen A;Sharon C;Duke JR;Taylor RB;Austin BJ;Stovall JK;Haggard BE;Chambliss CK;Brooks BW;Scott JT
有害藻华（HABs）的规模，频率和持续时间不断增加的人为因素，如富营养化和改变气候制度。虽然氮（N）和磷的浓度和比例与水华生物量和蓝藻毒素的生产相关，但对氮形态和微量营养素（MN）如何相互作用以调节赤潮和蓝藻毒素的生产知之甚少。在这里，我们使用了两种不同的方法来研究如何N和MN供应影响蓝藻生物量和蓝藻毒素的生产。首先，我们使用了微囊藻实验室培养，以研究如何N和MN浓度和N的形式影响的生物量，颗粒N，和微囊藻毒素LR浓度和细胞配额。然后，我们监测了N，铁，钼，和总微囊藻毒素的浓度从一个过度富营养化水库。从这个过度富营养化水库，我们进行了社区赤潮生物测定，研究如何N和MN除了影响生物量，颗粒N，和微囊藻毒素浓度。微囊藻实验室培养物生长在高尿素和MN条件下产生更多的生物量，颗粒N，并有类似的C：N化学计量，但较低的微囊藻毒素LR浓度和细胞配额相比，高硝酸盐和MN条件。我们的社区HAB生物测定显示，N浓度和MN之间没有相互作用，除了造成非限制性的MN背景浓度。生物量，颗粒态氮，微囊藻毒素的浓度增加与N添加。与非MN修正的社区HAB相比，用MN修正的社区HAB导致更大的微囊藻毒素-LA浓度。我们的研究结果强调了非生物变量如何控制生物量和蓝藻毒素生产的复杂性，在实验室培养的微囊藻和社区赤潮。
Harmful algal blooms (HABs) are increasing in magnitude, frequency, and duration caused by anthropogenic factors such as eutrophication and altered climatic regimes. While the concentrations and ratios of nitrogen (N) and phosphorus are correlated with bloom biomass and cyanotoxin production, there is less known about how N forms and micronutrients (MN) interact to regulate HABs and cyanotoxin production. Here, we used two separate approaches to examine how N and MN supply affects cyanobacteria biomass and cyanotoxin production. First, we used a Microcystis laboratory culture to examine how N and MN concentration and N form affected the biomass, particulate N, and microcystin-LR concentration and cell quotas. Then, we monitored the N, iron, molybdenum, and total microcystin concentrations from a hypereutrophic reservoir. From this hypereutrophic reservoir, we performed a community HAB bioassay to examine how N and MN addition affected the biomass, particulate N, and microcystin concentration. Microcystis laboratory cultures grown in high urea and MN conditions produced more biomass, particulate N, and had similar C:N stoichiometry, but lower microcystin-LR concentrations and cell quotas when compared to high nitrate and MN conditions. Our community HAB bioassay revealed no interactions between N concentration and MN addition caused by non-limiting MN background concentrations. Biomass, particulate N, and microcystin concentration increased with N addition. The community HAB amended with MN resulted in greater microcystin-LA concentration compared to non-MN amended community HABs. Our results highlight the complexity of how abiotic variables control biomass and cyanotoxin production in both laboratory cultures of Microcystis and community HABs.
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影响因子：
4.2
作者：
Chernoff N;Hill D;Lang J;Schmid J;Farthing A;Huang H
通讯作者：
Huang H
影响因子：
2.4
作者：
Downs, Theresa M.;Schallenberg, Marc;Burns, Carolyn W.
通讯作者：
Burns, Carolyn W.
影响因子：
2.7
作者：
Erratt, Kevin J.;Creed, Irena F.;Trick, Charles G.
通讯作者：
Trick, Charles G.
影响因子：
1.4
作者：
Davis, Timothy W.;Harke, Matthew J.;Gobler, Christopher J.
通讯作者：
Gobler, Christopher J.
影响因子：
4.5
作者：
Downing, TG;Meyer, C;van de Venter, M
通讯作者：
van de Venter, M