HABs and HAB nots: Dynamics of phytoplankton blooms across similar oligotrophic reservoirs

IF 2 4区 环境科学与生态学 Q2 LIMNOLOGY
Christina A. Murphy , Amanda M.M. Pollock , Ivan Arismendi , Sherri L. Johnson
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Abstract

Increasing frequency and intensity of cyanobacterial Harmful Algal Blooms (HABs) threaten human and aquatic ecosystem health. Improving our understanding of HABs across a range of systems will be critical to understanding and potentially minimizing risk, especially where HABs are occurring in less productive and less studied waterbodies. Here, the characteristics and annual dynamics of phytoplankton communities were examined, focusing on the timing, magnitude, and predictability of cyanobacterial blooms in five multi-purpose flood-control reservoirs from the Willamette Basin, Oregon, USA. A high similarity in phytoplankton composition and consistency in the timing of cyanobacterial dominance was hypothesized to occur across these oligotrophic reservoirs. However, periods of dominance by potentially HABs producing genera were inconsistent both in their timing and abundances among reservoirs and across years within each reservoir. The lack of regional predictability indicates the importance of local drivers in the formation, intensity, and composition of phytoplankton blooms. These findings have important implications for reservoir management and safeguarding freshwater drinking sources, as not all reservoirs appear to experience cyanobacterial blooms at the same time, demonstrating non-concurrent risks of HABs.

有害藻华与非有害藻华:浮游植物在类似贫营养水库中的繁殖动态
蓝藻有害藻华的频率和强度不断增加,威胁着人类和水生生态系统的健康。提高我们对一系列系统中有害生物的理解,对于理解并潜在地将风险降至最低至关重要,尤其是当有害生物发生在生产力较低、研究较少的水体中时。在这里,研究了浮游植物群落的特征和年度动态,重点是美国俄勒冈州威拉米特盆地五个多用途防洪水库蓝藻水华的时间、规模和可预测性。假设浮游植物组成的高度相似性和蓝藻优势时间的一致性发生在这些贫营养水库中。然而,潜在产生HABs的属的优势期在储层之间以及每个储层内的年份之间的时间和丰度都不一致。缺乏区域可预测性表明了当地驱动因素对浮游植物水华的形成、强度和组成的重要性。这些发现对水库管理和保护淡水饮用源具有重要意义,因为并非所有水库都同时出现蓝藻水华,这表明赤潮的风险不同时存在。
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来源期刊
Limnologica
Limnologica 环境科学-湖沼学
CiteScore
3.70
自引率
5.90%
发文量
64
审稿时长
3 months
期刊介绍: Limnologica is a primary journal for limnologists, aquatic ecologists, freshwater biologists, restoration ecologists and ecotoxicologists working with freshwater habitats.
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