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首页> 外文期刊>Harmful Algae >Empirical Models Of Toxigenic Pseudo-nitzschia Blooms: Potential Use As A Remote Detection Tool In The Santa Barbara Channel
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Empirical Models Of Toxigenic Pseudo-nitzschia Blooms: Potential Use As A Remote Detection Tool In The Santa Barbara Channel

机译：产毒假性奈瑟菌绽放的经验模型：潜在用作圣塔芭芭拉通道中的远程检测工具

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The Santa Barbara Channel, CA is a highly productive region where wind-driven upwelling and mesoscale eddies are important processes driving phytoplankton blooms. In recent years, the spring bloom has been dominated by the neurotoxin-producing diatom, Pseudo-nitzschia spp. In this paper, we relate a 1.5-year time series of Pseudo-nitzschia spp. abundance and domoic acid concentration to physical, chemical, and biological data to better understand the mechanisms controlling local Pseudo-nitzschia spp. bloom dynamics. The data were used to define the ranges of environmental conditions associated with Pseudo-nitzschia spp. bloom development in the Santa Barbara Channel. The time series captured three large toxic events (max. particulate domoic acid concentration, pDA ～6000 ng L~(-1); max. cellular domoic acid concentrations, cDA ～88 pg cell~(-1)) in the springs of 2005-2006 and summer 2005 corresponding to bloom-level Pseudo-nitzschia spp. abundance (>5.0 × 10~4 cells L~(-1)). In general, large increases in Pseudo-nitzschia spp. abundance were accompanied by increases in cDA levels, and cDA peaks preceded pDA peaks by at least one month in both the springs of 2005 and 2006. Statistical models incorporating satellite ocean color (MODIS-Aqua and SeaWiFS) and sea surface temperature (AVHRR) data were created to determine the probability that a remotely sensed phytoplankton bloom contains a significant population of toxic Pseudo-nitzschia spp. Models correctly estimate 98% of toxic bloom situations, with a 7-29% rate of false positive identification. Conditions most associated with high cDA levels are low sea surface temperature, high salinity, increased absorption by cDOM (412 nm), increased reflectance at 510/ 555 nm, and decreased particulate absorption at 510 nm. Future efforts to merge satellite and regionally downscaled forecasting products with these habitat models will help assess bloom forecasting capabilities in the central CA region and any potential connections to large-scale climate modes.
机译：加利福尼亚州圣塔芭芭拉海峡是一个高产地区，风力驱动的上升流和中尺度涡旋是推动浮游植物开花的重要过程。近年来，春季开花已由产生神经毒素的硅藻假拟南芥属（Pseudo-Nitzschia spp）主导。在本文中，我们关联了假性尼氏菌属的1.5年时间序列。对物理，化学和生物数据的丰度和海藻酸浓度，以更好地了解控制本地假性奈瑟菌属的机制。绽放动态。数据被用来定义与假奈瑟菌属相关的环境条件的范围。在圣塔芭芭拉海峡（Santa Barbara Channel）绽放。该时间序列捕获了2005年春季的三大毒害事件（最大颗粒状海藻酸浓度，pDA〜6000 ng L〜（-1）；最大细胞态海藻酸浓度，cDA〜88 pg cell〜（-1））。 -2006年和2005年夏季对应于花朵级别的拟南芥属（Pseudo-nitzschia spp）。丰度（> 5.0×10〜4个细胞L〜（-1））。通常，假性尼兹菌属物种大量增加。在2005年春季和2006年春季，cDA含量都随之增加，并且cDA峰值先于pDA峰值至少一个月。统计模型包括卫星海洋颜色（MODIS-Aqua和SeaWiFS）和海面温度（AVHRR）数据为了确定遥感浮游植物水华中含有大量有毒假单胞菌属物种的可能性，我们创建了这些信息。模型可以正确估计98％的中毒情况，假阳性识别率为7-29％。与高cDA水平最相关的条件是海面温度低，盐度高，cDOM（412 nm）吸收增加，在510/555 nm处反射率增加以及在510 nm处颗粒物吸收减少。未来将卫星和区域缩小的预测产品与这些栖息地模型合并的努力将有助于评估中部CA地区的花朵预测能力以及与大规模气候模式的任何潜在联系。

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