Tomasa Cuellar-Martinez , Aurora del Rocío Huanca Ochoa , Sonia Sánchez , Arturo Aguirre-Velarde , Elmer Omar Martínez Ocas , Angélica María Rodriguez Velasquez , Rosa Isabel Saavedra Querevalú , François Colas , Jorge Tam , Dimitri Gutiérrez
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Results showed that the most abundant species was <em>Heterosigma akashiwo</em>, and the most frequent ones were <em>Pseudo-nitzschia delicatisima</em> and <em>seriata</em> complexes. The majority of blooms were caused by <em>H. akashiwo</em> (21 events) and <span><em>Dinophysis acuminata</em></span><span><span> (19 events). Canonical correspondence analysis revealed the preference of dinoflagellates to warmer </span>sea surface temperatures and more stable conditions (indicated by low wind velocities) than </span><em>Pseudo-nitzschia</em><span> species. Generalized additive models (GAMs) indicated that wind velocities > 3.7 m s</span><sup>−1</sup><span> and El Niño conditions favor </span><em>Pseudo-nitzschia</em> species while warm temperatures (> 20 °C), weaker winds (< 3.7 m s<sup>−1</sup><span>), and cold periods associated with La Niña promoted higher densities of </span><em>D. acuminata</em> complex. A recent increasing trend in the density of <em>D. acuminata</em> was observed. This information is useful to understand the dynamics of potentially toxic species in upwelling regions.</p></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":null,"pages":null},"PeriodicalIF":2.7000,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":"{\"title\":\"Abundance and distribution of potentially toxic phytoplankton in aquaculture sites along the Peruvian coast\",\"authors\":\"Tomasa Cuellar-Martinez , Aurora del Rocío Huanca Ochoa , Sonia Sánchez , Arturo Aguirre-Velarde , Elmer Omar Martínez Ocas , Angélica María Rodriguez Velasquez , Rosa Isabel Saavedra Querevalú , François Colas , Jorge Tam , Dimitri Gutiérrez\",\"doi\":\"10.1016/j.jmarsys.2023.103865\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p><span><span>The presence of harmful microalgae in aquaculture sites represents a risk for production and human health, so surveillance of these species is relevant for early warning of harmful algal blooms. 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引用次数: 3
摘要
水产养殖场中有害微藻的存在对生产和人类健康构成风险,因此对这些物种的监测与有害藻华的早期预警有关。在这里,我们研究了秘鲁沿海地区与养殖紫锥藻和其他软体动物天然库有关的潜在有毒浮游植物的监测结果。我们评估了这些物种的密度、频率、时间和空间分布,以及2011年至2019年发生的水华。结果表明,赤纹异西格玛的数量最多,最常见的是美味拟菱形藻和绢云母复合体。大多数水华是由H.akashiwo(21个事件)和Dinophysis acuminata(19个事件)引起的。典型对应分析表明,甲藻比拟菱形藻更喜欢温暖的海面温度和更稳定的条件(以低风速表示)。广义加性模型(GAM)表明,风速>;3.7 m s−1和厄尔尼诺条件有利于伪菱形藻物种,而温暖的温度(>;20°C)、较弱的风(<;3.7 m s–1)和与拉尼娜现象相关的寒冷时期促进了尖锥藻复合体的更高密度。近几年来,观察到渐尖锥虫的密度有增加的趋势。这些信息有助于了解上升流地区潜在有毒物种的动态。
Abundance and distribution of potentially toxic phytoplankton in aquaculture sites along the Peruvian coast
The presence of harmful microalgae in aquaculture sites represents a risk for production and human health, so surveillance of these species is relevant for early warning of harmful algal blooms. Here we examine the monitoring results of potentially toxic phytoplankton in Peruvian coastal sites associated with the cultivation of Argopecten purpuratus and natural banks of other mollusks. We evaluated the density, frequency, temporal and spatial distribution of these species, as well as blooms occurred from 2011 to 2019. Results showed that the most abundant species was Heterosigma akashiwo, and the most frequent ones were Pseudo-nitzschia delicatisima and seriata complexes. The majority of blooms were caused by H. akashiwo (21 events) and Dinophysis acuminata (19 events). Canonical correspondence analysis revealed the preference of dinoflagellates to warmer sea surface temperatures and more stable conditions (indicated by low wind velocities) than Pseudo-nitzschia species. Generalized additive models (GAMs) indicated that wind velocities > 3.7 m s−1 and El Niño conditions favor Pseudo-nitzschia species while warm temperatures (> 20 °C), weaker winds (< 3.7 m s−1), and cold periods associated with La Niña promoted higher densities of D. acuminata complex. A recent increasing trend in the density of D. acuminata was observed. This information is useful to understand the dynamics of potentially toxic species in upwelling regions.
期刊介绍:
The Journal of Marine Systems provides a medium for interdisciplinary exchange between physical, chemical and biological oceanographers and marine geologists. The journal welcomes original research papers and review articles. Preference will be given to interdisciplinary approaches to marine systems.