Widespread anatoxin-a detection in benthic cyanobacterial mats throughout a river network.
Widespread anatoxin-a detection in benthic cyanobacterial mats throughout a river network.
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DOI：
10.1371/journal.pone.0197669
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发表时间：
2018
期刊：
影响因子：
3.7
通讯作者：
Power ME
中科院分区：
文献类型：
--
作者：
Bouma-Gregson K;Kudela RM;Power ME
在许多阳光充足的河流中，底栖藻类为夏季食物网提供了燃料，是初级和次级生产和生物地球化学循环的热点。令人担忧的是，河流底栖藻类组合可能被有毒的蓝藻控制，威胁水质和公众健康。在北加州的鳗鱼河，自2000年以来，有十几只狗死于氰毒素中毒。在2013-2015年夏季，我们记录了该流域蓝藻毒素浓度的时空格局，显示了底栖蓝藻席中anatoxin-a的广泛分布。每周部署固相吸附毒素跟踪（SPATT）采样器，在整个流域的10个地点记录溶解的微囊藻毒素和微囊藻毒素a水平，并从27个地点收集187个以水藻或磷为主的蓝藻垫样品，以测量细胞内的微囊藻毒素a （ATX）和微囊藻毒素（MCY）。SPATT样品（平均MCY = 0.8, ATX = 4.8 ng g-1 d -1）和蓝藻垫样品（平均MCY = 0.074, ATX = 1.89 μg -1 DW）的Anatoxin-a水平均高于微囊藻毒素。其中，58.9%的底栖垫检出anatoxin-a (max = 70.93 μg -1 DW)， 37.6%的底栖垫检出微囊藻毒素（max = 2.29 μg -1 DW）。SPATT的蓝藻毒素水平在夏季中期在分水岭温暖的主要流域达到峰值。这是广泛的anatoxin-a发生在底栖蓝藻垫在北美流域的第一个文件之一。
Benthic algae fuel summer food webs in many sunlit rivers, and are hotspots for primary and secondary production and biogeochemical cycling. Concerningly, riverine benthic algal assemblages can become dominated by toxic cyanobacteria, threatening water quality and public health. In the Eel River in Northern California, over a dozen dog deaths have been attributed to cyanotoxin poisonings since 2000. During the summers of 2013–2015, we documented spatial and temporal patterns of cyanotoxin concentrations in the watershed, showing widespread distribution of anatoxin-a in benthic cyanobacterial mats. Solid phase adsorption toxin tracking (SPATT) samplers were deployed weekly to record dissolved microcystin and anatoxin-a levels at 10 sites throughout the watershed, and 187 Anabaena-dominated or Phormidium-dominated cyanobacterial mat samples were collected from 27 locations to measure intracellular anatoxin-a (ATX) and microcystins (MCY). Anatoxin-a levels were higher than microcystin for both SPATT (mean MCY = 0.8 and ATX = 4.8 ng g resin-1 day-1) and cyanobacterial mat samples (mean MCY = 0.074 and ATX = 1.89 μg g-1 DW). Of the benthic mats sampled, 58.9% had detectable anatoxin-a (max = 70.93 μg g-1 DW), while 37.6% had detectable microcystins (max = 2.29 μg g-1 DW). SPATT cyanotoxin levels peaked in mid-summer in warm mainstem reaches of the watershed. This is one of the first documentations of widespread anatoxin-a occurrence in benthic cyanobacterial mats in a North American watershed.
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影响因子：
4.2
作者：
Backer LC;Landsberg JH;Miller M;Keel K;Taylor TK
通讯作者：
Taylor TK
影响因子：
6.6
作者：
Kudela, Raphael M.
通讯作者：
Kudela, Raphael M.
影响因子：
6.6
作者：
Fetscher, A. Elizabeth;Howard, Meredith D. A.;Sheath, Robert G.
通讯作者：
Sheath, Robert G.
影响因子：
6.6
作者：
Kaminski, Ariel;Bober, Beata;Bialczyk, Jan
通讯作者：
Bialczyk, Jan
影响因子：
6.6
作者：
Gibble, Corinne M.;Peacock, Melissa B.;Kudela, Raphael M.
通讯作者：
Kudela, Raphael M.