Typhoon-induced response of phytoplankton and bacteria in temperate coastal waters.
Typhoon-induced response of phytoplankton and bacteria in temperate coastal waters.
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台风引起的温带沿海水域浮游植物和细菌的反应。
DOI：
10.1016/j.ecss.2015.10.026
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
A
中科院分区：
文献类型：
--
作者：
Tsuchiya;K.;Sano;T.;Kawasaki;N.;Fukuda;H.;Tomioka;N.;Hamasaki;K.;Tada;Y.;Shimode;S.;Toda;T. and Imai;A
2010年台风马卢因过境后，每天在两个近岸（Sta. A）和离岸（Sta. M）站，研究了细菌和浮游植物对台风过境引起的物理化学环境变化的响应，结果表明，台风过境导致两个站盐度急剧下降，营养盐含量大幅增加。盐度和营养盐浓度之间的关系表明，主要的营养来源是陆地径流在Sta。M和沉积物再悬浮除了陆地径流在Sta。A.在Sta.马卢传代后1天，A显示114 ± 21 mg Cm −3d− 1，而初级生产力（PP）为76 ± 8 mg Cm −3d−1，表明BP占主导地位（BP/PP比值= 1.5）。Malou传代后2天PP超过BP，5天后达到最大值554 ± 32 mg Cm-3d-1（BP/PP比值= 0.10）。PP在Sta中一直占主导地位。M（BP/PP比值= 0.13 ± 0.05）。BP与细菌丰度的比值（BP/BA比值）在Sta. M与PP呈正相关，表明细菌生产力取决于来自浮游植物的自生基质。在Sta. A与PP无相关性，表明PP不仅能提高细菌的生产力，而且还能增加外源底物的负荷。BP/BA比值随PO 4和NH 4浓度的增加呈指数增加，这些浓度可能来自沉积物孔隙沃茨。结果表明，沉积物再悬浮诱导台风通过后，细菌的生产力突然在近海站通过。台风过境后，不同营养源的相对贡献差异可以调节细菌的反应。
After the passage of typhoonMalouin 2010, daily field samplings were conducted at both inshore (Sta. A) and offshore (Sta. M) stations in Sagami Bay, Japan, to evaluate responses of bacteria and phytoplankton to variations of physical-chemical environments induced by typhoon passage.Maloupassage caused an abrupt decline of salinity and a large increase in the amount of nutrients at both stations. The relationships between salinity and nutrient concentrations suggested that major nutrient sources were terrestrial runoff at Sta. M and sediment resuspension in addition to terrestrial runoff at Sta. A. Bacterial production (BP) at Sta. A showed 114 ± 21 mg C m−3d−1one day afterMaloupassage, while primary production (PP) was 76 ± 8 mg C m−3d−1, suggesting the dominance of BP (BP/PP ratio = 1.5). PP exceeded BP two days afterMaloupassage, and then reached a maximum of 554 ± 32 mg C m−3d−1five days later (BP/PP ratio = 0.10). PP was always dominant at Sta. M throughout the study period (BP/PP ratio = 0.13 ± 0.05). The ratio of BP to bacterial abundance (BP/BA ratio) at Sta. M showed a positive correlation with PP, suggesting that bacterial productivity depended on autochthonous substrates derived from phytoplankton. The BP/BA ratio at Sta. A showed no relationship with PP, suggesting that bacterial productivity was enhanced not only by PP, but also loading of allochthonous substrates. BP/BA ratios at both stations increased exponentially with the increase of PO4and NH4concentrations; these concentrations are likely coming from sediment pore waters. The results suggest that sediment resuspension induced by typhoon passage enhanced bacterial productivity abruptly just after the passage at an inshore station. The bacterial response could be regulated by difference in relative contribution of nutrient sources after the passage of typhoon.