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首页> 外文期刊>Estuarine Coastal and Shelf Science >Drivers of phytoplankton dynamics in old Tampa Bay, FL (USA), a subestuary lagging in ecosystem recovery
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Drivers of phytoplankton dynamics in old Tampa Bay, FL (USA), a subestuary lagging in ecosystem recovery

机译：美国佛罗里达州坦帕湾（美国）的浮游植物动力学驱动因素，这是生态系统恢复滞后的河口

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摘要

In the past four decades, consistent and coordinated management actions led to the recovery of Tampa Bay, FL (USA) an estuary that was declared dead in the 1970s. An exception to this success story is Old Tampa Bay, the northernmost subestuary of the system. Compared to the other bay segments, Old Tampa Bay is characterized by poorer water quality and spring and summer blooms of cyanobacteria, pico-plankton, diatoms, and the saxitoxin-producing dinoflagellate Pyrodinium bahamense. Together, these blooms contribute to light attenuation and lagging recovery of seagrass beds. Yet, studies of phytoplankton dynamics within Old Tampa Bay have been limited both in number and in their spatiotemporal resolution. In this, study, we used field sampling and continuous monitoring to (1) characterize temporal and spatial variability in phytoplankton biomass and community composition and (2) identify key drivers of the different phytoplankton blooms in Old Tampa Bay. Overall, temporal variability in phytoplankton biomass (using chlorophyll a as a proxy) and community composition surpassed spatial variability of these parameters. We found a base community of small diatoms and flagellates, as well as certain dinoflagellates, that persisted year round in the system. Seasonally, freshwater runoff stimulated phytoplankton growth, specifically that of chlorophytes, cyanobacteria and other dinoflagellates consistent with predictions based on ecological theory. On shorter time scales, salinity, visibility, and freshwater inflows were important predictors of phytoplankton biomass. With respect to P. bahamense, environmental drivers including salinity, temperature and dissolved nutrient concentrations explained 24% of the variability in cell abundance, indicating missing explanatory parameters in our study for this taxon, such as cyst density and location of cyst beds. Spatially, we found differences in community trajectories across north south and west east gradients, with the northernmost sampling station being the most unique in the region. This work contributes to the knowledge of phytoplankton biomass and community composition in Tampa Bay by generating spatially and temporally rich phytoplankton community and environmental data for the Old Tampa Bay subestuary. Moreover, it enhances our understanding of bloom drivers and provides recommendations for ecosystem management. Specifically, our findings support continued nutrient reduction measures as a way to mitigate seasonal blooms of diatoms, cyanobacteria and chlorophytes, but not necessarily blooms of P. bahamense. Prediction and mitigation of P. bahamnese blooms should incorporate first order drivers such as cyst location and abundance. (C) 2016 Elsevier Ltd. All rights reserved.
机译：在过去的四十年中，一致而协调的管理行动导致佛罗里达州坦帕湾（美国）的复原，该河口在1970年代被宣布死亡。这个成功案例的一个例外是老坦帕湾，该系统的最北端河口。与其他海湾地区相比，老坦帕湾的特点是水质较差，并且蓝藻，皮克浮游生物，硅藻和产沙毒素的鞭毛二鞭毛藻（Pyrodinium bahamense）的春季和夏季开花。这些花朵共同促进了海草床的光衰减和滞后恢复。然而，老坦帕湾内浮游植物动力学的研究在数量和时空分辨率上都受到限制。在这项研究中，我们使用现场采样和连续监测来（1）表征浮游植物生物量和群落组成的时空变化，以及（2）识别旧坦帕湾不同浮游植物开花的关键驱动因素。总体而言，浮游植物生物量的时间变化（以叶绿素a为代表）和群落组成超过了这些参数的空间变化。我们发现了一个小硅藻和鞭毛虫以及某些鞭毛鞭毛虫的基础群落，它们在系统中全年都持续存在。季节性地，淡水径流刺激了浮游植物的生长，特别是绿藻，蓝细菌和其他鞭毛藻的生长，与基于生态学理论的预测一致。在较短的时间尺度上，盐度，能见度和淡水流入量是浮游植物生物量的重要预测指标。对于巴哈马疟原虫，包括盐度，温度和溶解的营养物浓度在内的环境驱动因素解释了细胞丰度变化的24％，这表明我们在该研究中缺少该分类群的解释性参数，例如囊肿密度和囊肿床位。在空间上，我们发现了南北和西东坡度的群落轨迹差异，其中最北端的采样站是该地区最独特的。通过为老坦帕湾子河口生成时空丰富的浮游植物群落和环境数据，这项工作有助于坦帕湾浮游植物生物量和群落组成的知识。此外，它增进了我们对绽放驱动力的理解，并为生态系统管理提供了建议。具体而言，我们的发现支持持续的营养减少措施，以减轻硅藻，蓝藻和绿藻类植物的季节性开花，但不一定减轻巴哈姆氏菌的开花。预测和缓解巴氏假单胞菌的花期应纳入一级驱动因素，例如囊肿的位置和丰度。 （C）2016 Elsevier Ltd.保留所有权利。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2017年第5期|130-140|共11页
  • 作者

    Corcoran Alina A.; Wolny Jennifer; Leone Erin; Ivey James; Murasko Susan;

  • 作者单位

    Fish & Wildlife Res Inst, Florida Fish & Wildlife Conservat Commiss, 100 8th Ave SE, St Petersburg, FL 33701 USA;

    Fish & Wildlife Res Inst, Florida Fish & Wildlife Conservat Commiss, 100 8th Ave SE, St Petersburg, FL 33701 USA|Maryland Dept Nat Resources, 1919 Lincoln Dr, Annapolis, MD 21401 USA;

    Fish & Wildlife Res Inst, Florida Fish & Wildlife Conservat Commiss, 100 8th Ave SE, St Petersburg, FL 33701 USA;

    Fish & Wildlife Res Inst, Florida Fish & Wildlife Conservat Commiss, 100 8th Ave SE, St Petersburg, FL 33701 USA|Univ S Florida, Dept Environm Sci Policy & Geog, 140 7th Ave 5, St Petersburg, FL 33701 USA;

    Fish & Wildlife Res Inst, Florida Fish & Wildlife Conservat Commiss, 100 8th Ave SE, St Petersburg, FL 33701 USA;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Phytoplankton; Algal blooms; Community composition; Monitoring; Pyrodinium bahamense; USA; Florida; Tampa Bay;

    机译：浮游植物;藻类开花;群落组成;监测;巴哈毕赤酵母;美国;佛罗里达;坦帕湾;

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