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首页> 外文期刊>Estuarine Coastal and Shelf Science >Influence of hydrography on the spatiotemporal variability of phytoplankton assemblages and primary productivity in Funka Bay and the Tsugaru Strait
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Influence of hydrography on the spatiotemporal variability of phytoplankton assemblages and primary productivity in Funka Bay and the Tsugaru Strait

机译：水文对丰卡湾和津轻海峡浮游植物组合时空变异和初级生产力的影响

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摘要

Phytoplankton community structures and primary productivity were assessed in relation to the oceanographic conditions in the coastal waters of Funka bay and the eastern end of the Tsugaru Strait, adjacent to southwestern Hokkaido, Japan, from April 2010 to January 2012. Phytoplankton community compositions, as estimated from chemotaxonomic analysis based on high-performance liquid chromatography of pigments, showed diatom blooms during spring in both 2010 and 2011. However, spatial heterogeneity of chlorophyll a (Chl a) concentration and primary productivity were found between regions investigated within and outside of Funka Bay during the spring diatom blooms in April 2010. The low Chl a concentrations within Funka Bay in April 2010 were related to the depletion of dissolved inorganic macronutrients, which implies that this difference was related to both the small inflow of the cold Coastal Oyashio Current (COW),into the bay and the development of clockwise circulation caused by discharge of fresh water into the bay. After the spring diatom blooms, the major phytoplankton groups in the study area were Chl b-containing phytoplanktons (chlorophytes and prasinophytes) because of changes in salinity associated with river discharge during the melting season. The results indicate that these phytoplanktons play an important role in the carbon cycle after the spring bloom in Funka Bay and the eastern end of the Tsugaru Strait. The thermohaline fronts created by the COW and the Tsugaru Warm Water in late February produced north south differences in phytoplankton community structures in the eastern end of the Tsugaru Strait. Diatoms with high Chl a concentrations dominated in the northern section of the front. In the southern section, the proportions of chlorophytes and cryptophytes were high. Increases in cyanobacterial abundance and temperature were detected in both regions. Additionally, the contribution of pico-plus nano-sized phytoplanlcton productivity to the total primary productivity at the surface was concomitant with increases in temperature. Our results suggest that small-sized phytoplankton become more important part of the food web during summer, even in the coastal waters. (C) 2017 Elsevier Ltd. All rights reserved.
机译：于2010年4月至2012年1月，对与日本北海道西南部毗邻的Funka湾沿海地区和津轻海峡东端的海洋学状况，对浮游植物群落结构和初级生产力进行了评估。基于色素高效液相色谱的化学分类学分析显示，2010年和2011年春季都出现了硅藻绽放。但是，在Funka湾内外调查的区域之间发现了叶绿素a（Chl a）浓度的空间异质性和初级生产力。在2010年4月的春季硅藻盛开期间。2010年4月在Funka湾内Chl a的低浓度与溶解的无机大量营养素的消耗有关，这意味着这种差异与寒冷的沿海Oyashio Current（COW）的少量流入有关。 ），由迪斯科进入海湾和顺时针循环的发展冲入海湾的淡水。春季硅藻开花后，由于融化季节中与河水排放有关的盐度变化，研究区域中主要的浮游植物群为含Chbb的浮游植物（绿藻类和绿藻类）。结果表明，这些浮游植物在春季春季开花之后在Funka湾和津轻海峡东端的碳循环中起着重要作用。 2月下旬，COW和Tsugaru暖水所形成的温盐线锋在Tsugaru海峡东端的浮游植物群落结构产生了南北差异。 Chl a浓度高的硅藻在前部的北部占主导地位。在南部地区，绿化植物和隐生植物的比例很高。在两个区域中都检测到了蓝细菌的丰度和温度的增加。此外，随着温度的升高，皮克级以上的纳米级浮游植物生产力对表面总初级生产力的贡献也随之增加。我们的结果表明，即使在沿海水域，小型浮游植物在夏季也成为食物网中更重要的部分。 （C）2017 Elsevier Ltd.保留所有权利。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2017年第15期|199-211|共13页
  • 作者

    Isada Tomonori; Hirawake Toru; Nakada Satoshi; Kobayashi Tsukuru; Sasaki Kenichi; Tanaka Yoshiyuki; Watanabe Shuichi; Suzuki Koji; Saitoh Sei-Ichi;

  • 作者单位

    Hokkaido Univ, Fac Fisheries Sci, 3-1-1 Minato Cho, Hakodate, Hokkaido 0418611, Japan|Hokkaido Univ, Field Sci Ctr Northern Biosphere, Akkeshi Marine Stn, Aikappu 1, Akkeshi Cyo, Hokkaido 0881113, Japan;

    Hokkaido Univ, Fac Fisheries Sci, 3-1-1 Minato Cho, Hakodate, Hokkaido 0418611, Japan;

    Kobe Univ, Grad Sch Maritime Sci, Higashinada Ku, 5-1-1 Fukae Minami, Kobe, Hyogo 6580022, Japan;

    Hokkaido Univ, Fac Fisheries Sci, 3-1-1 Minato Cho, Hakodate, Hokkaido 0418611, Japan;

    Japan Agcy Marine Earth Sci & Technol, Mutsu Inst Oceanog, Kita Sekine 690, Sekine Mutsu, Aomori, Japan;

    Japan Agcy Marine Earth Sci & Technol, Mutsu Inst Oceanog, Kita Sekine 690, Sekine Mutsu, Aomori, Japan|Hachinohe Inst Technol, Ctr Liberal Arts & Sci, Ohbiraki 88-1, Hachinohe, Aomori 0318501, Japan;

    Japan Agcy Marine Earth Sci & Technol, Mutsu Inst Oceanog, Kita Sekine 690, Sekine Mutsu, Aomori, Japan;

    Hokkaido Univ, Grad Sch Environm Sci, Kita Ku, North 10 West 5, Sapporo, Hokkaido 0600810, Japan;

    Hokkaido Univ, Fac Fisheries Sci, 3-1-1 Minato Cho, Hakodate, Hokkaido 0418611, Japan;

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  • 正文语种 eng
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  • 关键词

    Phytoplankton assemblages; HPLC-CHEMTAX; Primary productivity; Seasonal change; Coastal ecosystem; River discharge;

    机译：浮游植物组合;HPLC-CHEMTAX;初级生产力;季节变化;沿海生态系统;河流排放;

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