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Spatial modeling to detect potential incidence zones of harmful algae blooms in Veracruz, Mexico
Estuarine, Coastal and Shelf Science ( IF 2.8 ) Pub Date : 2020-07-25 , DOI: 10.1016/j.ecss.2020.106908
Alma Gabriela Copado-Rivera , Javier Bello-Pineda , José Antolín Aké-Castillo , Patricia Arceo

Harmful algae blooms (HABs) are proliferations of microscopic algae associated with rapid production of biomass and/or toxic substances. This production's accumulation may cause massive death of marine life and affect human health with devastating economic repercussions. Monitoring HABs usually involves precise but costly field sampling and laboratory analyses. Satellite images and some of its derived products such as the Fluorescence Line Height (FLH) have become cost-effective tools that have been proved useful for identification and monitor HABs at the Florida coast. In this study we used a spatially explicit modeling approach to identify potential incidence zones of HABs at Veracruz, Mexico. We relied on two sets of data: The first set consists of reports of HABs-related events published in both scientific journals and journalistic notes for the 2004 to 2015 period. The second set is comprised of FLH monthly products derived from the MODIS-Aqua satellite imagery for the same period. We conducted a retrospective analysis of monthly FLH values to analyze the spatial and temporal extent of potential HABs and compared them with published reports. It was noted that HABs events registered in literature for that period were identified with our spatial analysis, but most of the events identified as potential HABs with our analysis were not registered in literature. We conducted a “Hot- spots” analysis and identified four well-defined incidence zones for the entire coast of Veracruz state: the Port of Veracruz, Alvarado, Coatzacoalcos, and the Tamiahua Lagoon. Of the four zones, only the Port of Veracruz has been reported as an incidence zone for HABs events, while the other three have very few or no reports of HABs related events. We found this technique is accurate for HABs detection, as the analysis is based upon the local knowledge of harmful algae species.



中文翻译:

空间模型可检测墨西哥韦拉克鲁斯州有害藻华的潜在发生区

有害藻华(HABs)是与快速产生生物质和/或有毒物质有关的微小藻类的繁殖。这种生产的积累可能导致海洋生物的大规模死亡,并给人类健康带来灾难性的经济影响。监测HAB通常涉及精确但昂贵的现场采样和实验室分析。卫星图像及其衍生产品(例如荧光线高度(FLH))已成为具有成本效益的工具,已被证明可用于识别和监视佛罗里达海岸的HAB。在这项研究中,我们使用空间显式建模方法来识别墨西哥韦拉克鲁斯州HAB的潜在发病区。我们依靠两组数据:第一组包括2004年至2015年期间在科学期刊和新闻记录中发表的与HAB相关事件的报告。第二组包括同期从MODIS-Aqua卫星影像获得的FLH月度产品。我们对每月FLH值进行了回顾性分析,以分析潜在HAB的时空范围,并将其与已发表的报告进行比较。需要注意的是,在那个时期在文献中注册的HAB事件是通过我们的空间分析确定的,但是在我们的分析中被识别为潜在HAB的大多数事件并未在文献中注册。我们进行了“热点”分析,并确定了韦拉克鲁斯州整个海岸的四个明确定义的发生区:韦拉克鲁斯州港口,阿尔瓦拉多,Coatzacoalcos和塔米亚瓦泻湖。在这四个区域中,只有韦拉克鲁斯港被报告为HAB事件的发生区,而其他三个区域则很少或没有关于HAB相关事件的报告。我们发现此技术对于HABs检测是准确的,因为分析是基于有害藻类物种的本地知识。

更新日期:2020-07-25
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