Image-derived indicators of phytoplankton community responses to Pseudo-nitzschia blooms

IF 5.5 1区 生物学 Q1 MARINE & FRESHWATER BIOLOGY
Vitul Agarwal , Virginie Sonnet , Keisuke Inomura , Audrey B. Ciochetto , Colleen B. Mouw
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引用次数: 0

Abstract

Phytoplankton populations in the natural environment interact with each other. Despite rising global concern with Pseudo-nitzschia blooms, which can produce the potent neurotoxin domoic acid, we still do not fully understand how other phytoplankton genera respond to the presence of Pseudo-nitzschia. Here, we used a 4-year high-resolution imaging dataset for 9 commonly found phytoplankton genera in Narragansett Bay, alongside environmental data, to identify potential interactions between phytoplankton genera and their response to elevated Pseudo-nitzschia abundance. Our results indicate that Pseudo-nitzschia tends to bloom either concurrently with or right after other phytoplankton genera. Such bloom periods coincide with higher water temperatures and lower salinity. Pseudo-nitzschia image abundance tends to increase the most from March-May and peaks during May-Jun, whereas the image-derived biovolume and width of Pseudo-nitzschia chains increase the most during Jan-Feb. For most phytoplankton genera, their relationship with Pseudo-nitzschia abundance is noticeably different from their relationship with Pseudo-nitzschia image features. Despite the complexity in the phytoplankton community, our analysis suggests several ecological indicators that may be used to determine the risk of harmful algal blooms.

浮游植物群落对伪尾柱虫藻华反应的图像衍生指标
自然环境中的浮游植物种群会相互影响。尽管全球日益关注可产生强效神经毒素多莫西酸的伪黑藻藻华,但我们仍不完全了解其他浮游植物属如何应对伪黑藻的存在。在这里,我们利用纳拉甘西特湾 9 个常见浮游植物属的 4 年高分辨率成像数据集以及环境数据,来确定浮游植物属之间的潜在相互作用及其对假尼茨藻丰度升高的反应。我们的研究结果表明,假尼茨藻往往与其他浮游植物同时或紧随其后绽放。这种开花期与较高的水温和较低的盐度相吻合。假水蚤的图像丰度在 3-5 月间增长最快,5-6 月间达到顶峰,而假水蚤链的图像生物体积和宽度在 1-2 月间增长最快。对于大多数浮游植物属来说,它们与伪水草丰度的关系明显不同于它们与伪水草图像特征的关系。尽管浮游植物群落很复杂,但我们的分析提出了几个生态指标,可用于确定有害藻华的风险。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Harmful Algae
Harmful Algae 生物-海洋与淡水生物学
CiteScore
12.50
自引率
15.20%
发文量
122
审稿时长
7.5 months
期刊介绍: This journal provides a forum to promote knowledge of harmful microalgae and macroalgae, including cyanobacteria, as well as monitoring, management and control of these organisms.
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