Response of phytoplankton and bacterial biomass during a wastewater effluent diversion into nearshore coastal waters

Caron David A.; Gellene Alyssa G.; Smith Jayme; Seubert Erica L.; Campbell Victoria; Sukhatme Gaurav S.; Seegers Bridget; Jones Burton H.; Lie Alle A. Y.; Terrado Ramon; Howard Meredith D. A.; Kudela Raphael M.; Hayashi Kendra; Ryan John; Birch James; Demir-Hilton Elif; Yamahara Kevan; Scholin Chris; Mengel Michael; Robertson George

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Response of phytoplankton and bacterial biomass during a wastewater effluent diversion into nearshore coastal waters

机译：废水排入近岸沿海水域期间浮游植物和细菌生物量的响应

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A 3-week diversion of the Orange County Sanitation District effluent discharge into nearshore waters off Newport Beach, CA constituted a considerable injection of secondarily-treated effluent into the coastal ecosystem. The location approximate to 1.6 km from shore, shallow water depth (approximate to 16 m), volume and nutrient content of the discharge (approximate to 53 x 10(8) L day(-I) of effluent with inorganic nitrogen concentration >2 mM) during the diversion raised concerns regarding the potential for stimulating phytoplankton blooms and, in particular, blooms of toxic species. Remarkably, phytoplankton standing stocks during the event and shortly thereafter did not reach values associated even with minor blooms historically observed in the region (generally <5 mu g 1(-1)), although shifts in community composition were observed. Diatom abundances increased early during the diveision, dinoflagellates, phototrophic picoplanktonic eukaryotes and other algae increased mid-diversion, and cyanobacteria (Synechococcus, Prochlorococcus) increased near the end of the diversion. Concentrations of domoic acid (a phycotoxin commonly present in the area) remained near or below detection throughout the diversion, and abundances of potentially-harmful algal species were unresponsive. Bacterial biomass increased during the diversion, and equaled or exceeded total phytoplankton biomass in most samples. Abundances of microbial grazers were also elevated during the diversion. We speculate that nutrient uptake by the bacterial biomass, acting in concert with or a response to a negative effect of disinfection byproducts associated with chlorination on phytoplankton physiology, played a significant role in muting the response of the phytoplankton to nutrients released in the effluent. (C) 2015 Elsevier Ltd. All rights reserved.

机译：在加利福尼亚州纽波特比奇附近，奥兰治县卫生区废水排放进行了为期3周的转移到近岸水域，构成了将大量经过二次处理的废水注入沿海生态系统。该位置距岸边约1.6 km，浅水深度（约16 m），排水量和养分含量（无机氮浓度> 2 mM的出水量约为53 x 10（8）L day（-I））在转移过程中引起了人们对刺激浮游植物水华，特别是有毒物种水华的潜力的担忧。值得注意的是，尽管观察到群落组成发生了变化，但活动期间以及此后不久的浮游植物常备种群甚至没有达到与该地区历史上观察到的小花期有关的值（通常<5μg 1（-1））。在剥离过程中，硅藻的丰度在早期增加，鞭毛藻，光养微微浮游真核生物和其他藻类在过渡过程中增加，而蓝细菌（Synechococcus，Prochlorococcus）在过渡结束时增加。在整个转移过程中，海藻酸（该地区普遍存在的植物毒素）的浓度保持在检测附近或以下，并且对潜在有害藻类的丰富性没有反应。在转移过程中，细菌生物量增加，并且在大多数样本中，细菌总生物量等于或超过总浮游生物量。在转移过程中，微生物放牧者的数量也增加了。我们推测细菌生物量吸收养分，与氯化相关的消毒副产物对浮游植物生理的协同作用或对之产生的负面影响，在抑制浮游植物对废水中释放的养分的反应中起着重要作用。（C）2015 Elsevier Ltd.保留所有权利。

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来源
《Estuarine Coastal and Shelf Science》 |2017年第ptab期|223-236|共14页
作者
Caron David A.; Gellene Alyssa G.; Smith Jayme; Seubert Erica L.; Campbell Victoria; Sukhatme Gaurav S.; Seegers Bridget; Jones Burton H.; Lie Alle A. Y.; Terrado Ramon; Howard Meredith D. A.; Kudela Raphael M.; Hayashi Kendra; Ryan John; Birch James; Demir-Hilton Elif; Yamahara Kevan; Scholin Chris; Mengel Michael; Robertson George;
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作者单位

Univ Southern Calif, Dept Biol Sci, Los Angeles, CA 90089 USA;

Univ Southern Calif, Dept Biol Sci, Los Angeles, CA 90089 USA;

Univ Southern Calif, Dept Biol Sci, Los Angeles, CA 90089 USA;

Univ Southern Calif, Dept Biol Sci, Los Angeles, CA 90089 USA;

Univ Southern Calif, Dept Biol Sci, Los Angeles, CA 90089 USA;

Univ Southern Calif, Dept Comp Sci, Los Angeles, CA 90089 USA;

Univ Southern Calif, Dept Biol Sci, Los Angeles, CA 90089 USA;

Univ Southern Calif, Dept Biol Sci, Los Angeles, CA 90089 USA|King Abdullah Univ Sci & Technol, 4700 KAUST, Thuwal 239556900, Saudi Arabia;

Univ Southern Calif, Dept Biol Sci, Los Angeles, CA 90089 USA;

Univ Southern Calif, Dept Biol Sci, Los Angeles, CA 90089 USA;

Southern Calif Coastal Water Res Project, 3535 Harbor Blvd, Costa Mesa, CA 92626 USA;

Univ Calif Santa Cruz, Ocean Sci, 1156 High St, Santa Cruz, CA 95064 USA|Univ Calif Santa Cruz, Inst Marine Sci, 1156 High St, Santa Cruz, CA 95064 USA;

Univ Calif Santa Cruz, Ocean Sci, 1156 High St, Santa Cruz, CA 95064 USA|Univ Calif Santa Cruz, Inst Marine Sci, 1156 High St, Santa Cruz, CA 95064 USA;

Monterey Bay Aquarium Res Inst, 7700 Sandholdt Rd, Moss Landing, CA 95039 USA;

Monterey Bay Aquarium Res Inst, 7700 Sandholdt Rd, Moss Landing, CA 95039 USA;

Monterey Bay Aquarium Res Inst, 7700 Sandholdt Rd, Moss Landing, CA 95039 USA;

Monterey Bay Aquarium Res Inst, 7700 Sandholdt Rd, Moss Landing, CA 95039 USA;

Monterey Bay Aquarium Res Inst, 7700 Sandholdt Rd, Moss Landing, CA 95039 USA;

Orange Cty Sanitat Dist, 10844 Ellis Ave, Fountain Valley, CA 92708 USA;

Orange Cty Sanitat Dist, 10844 Ellis Ave, Fountain Valley, CA 92708 USA;

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原文格式 PDF
正文语种 eng
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关键词
Bacteria; Phytoplankton; Nutrients; Coastal ecology; HABs; Effluent;

机译：细菌;浮游植物;营养物;沿海生态学;HABs;出水;

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Response of phytoplankton and bacterial biomass during a wastewater effluent diversion into nearshore coastal waters

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