Toward predicting Dinophysis blooms off NW Iberia: A decade of events
Toward predicting Dinophysis blooms off NW Iberia: A decade of events
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DOI：
10.1016/j.hal.2015.12.002
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发表时间：
2016-03-01
期刊：
影响因子：
6.6
通讯作者：
Oliveira, Paulo B.
中科院分区：
文献类型：
--
作者：
Teresa Moita, Ma;Pazos, Yolanda;Oliveira, Paulo B.
尖鳍甲藻和尖鳍甲藻是伊比利亚西北部海域的常见种，但它们的爆发条件不同。十年（2004-2013年）位于Rias de Aveiro-AV入口处的两个监测站每种物种的每周数据（葡萄牙西北部，北纬40度38.6'）和蓬特韦德拉-PO（西班牙加利西亚，北纬42度21.5'），用于研究与物种检测相关的区域同步性和中尺度差异，水华（>200 cells L ~（-1））的发生和发展。结果突出了高年际变化的水华事件，并总结了相关的气象/海洋条件。D.在2004-2008年和2013年观察到了锐藻水华，并且在AV处的物种最高峰发生在其猎物中缢虫的最高峰之后，时滞为2-3周。D.在这两个监测站每年都观察到尖形水华。细胞浓度时间序列表明，水华一般呈现3月份开始的序列，D。acuminata，3周后在AV组，D.急性发作，从AV开始，三个月后在PO。特别是，D。在春季上升流（2007年）或径流量（2010年）较高的年份，AV的渐尖型水华发生早于PO。D.在2008年秋季出现异常的强烈上升流后，发生了急性水华，这被解释为种群核心向赤道移动的结果。数值模型的解决方案被用来分析每月沿岸电流异常和测试运输假设选定的事件。结果表明，向极/向赤道流的年际变化与上升流强迫风的变化有关，D。从AV到PO的急性开花和D. AV的acuminata水华可能是由PO向南平流的接种物引起的。然而，拉格朗日示踪剂的垂直位置的结果的敏感性，呼吁更多的研究物种分布在不同的开花阶段。(C)2015爱思唯尔B. V.保留所有权利。
Dinophysis acuminata and Dinophysis acuta are recurrent species off NW Iberia but their outbreaks occur under different conditions. A decade (2004-2013) of weekly data for each species at two sentinel stations located at the entrance of Rias de Aveiro-AV (NW Portugal, 40 degrees 38.6' N) and Pontevedra-PO (Galicia, Spain, 42 degrees 21.5' N), were used to investigate the regional synchronism and mesoscale differences related to species detection, bloom (>200 cells L-1) initiation and development. Results highlight the high interannual variability of bloom events and summarize the associated meteorological/oceanographic conditions. D. acuta blooms were observed in 2004-2008 and 2013, and the species highest maxima at AV occurred after the highest maxima of its prey Mesodinium, with a time-lag of 2-3 weeks. D. acuminate blooms were observed every year at both stations. The cell concentration time series shows that the blooms generally present a sequence starting in March with D. acuminata in PO and three weeks later in AV, followed by D. acuta that starts at AV and three months later in PO. Exceptionally, D. acuminate blooms occurred earlier at AV than PO, namely in high spring upwelling (2007) or river runoff (2010) years. A four-year gap (2009-2012) of D. acuta blooms occurred after an anomalous 2008 autumn with intense upwelling which is interpreted as the result of an equatorward displacement of the population core. Numerical model solutions are used to analyze monthly alongshore current anomalies and test transport hypotheses for selected events. The results show a strong interannual variability in the poleward/equatorward currents associated with changes in upwelling forcing winds, the advection of D. acute blooms from AV to PO and the possibility that D. acuminata blooms at AV might result from inocula advected southward from PO. However, the sensitivity of the results to vertical position of the lagrangian tracers call for more studies on species distribution at the various bloom stages. (C) 2015 Elsevier B.V. All rights reserved.