Microbial food web dynamics in the oceanic Gulf of Mexico

Microbial food web dynamics in the oceanic Gulf of Mexico
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墨西哥湾海洋微生物食物网动态

DOI:
10.1093/plankt/fbab021
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发表时间:
2021
影响因子:
2.1
通讯作者:
Quackenbush, Cameron R
Quackenbush, Cameron R
中科院分区:
环境科学与生态学3区
文献类型:
--
作者:
Landry, Michael R;Selph, Karen E;Stukel, Michael R;Swalethorp, Rasmus;Kelly, Thomas B;Beatty, Jennifer L;Quackenbush, Cameron R

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浮游植物生长和微型浮游动物摄食率在稀释实验的重复配置文件中进行了测量,以评估墨西哥湾寡营养蓝鳍金枪鱼产卵栖息地的微生物生产和食物网特征(5月产卵高峰季节,2017-2018年)。放牧往往超过增长的过程更平衡的整体在表面混合层,但生物量积累在中间真光区。与太平洋类似的公海研究相比,群落生产力估计值(260-500 mg C m− 2天−1)较低,原绿球藻一直是生产力的主要贡献者(113-204 mg C m− 2天−1),而硅藻和甲藻(分别为2-10和4-13 mg C m− 2天−1)一直较低。Prymnesiophytes是最具活力的成分(34-134 mg C m− 2 day −1),在2017年的实验中占主导地位。放牧相对于生产意外的不平衡,观察到所有微型浮游生物种群(原绿球藻,集球藻和异养细菌),这表明在没有大型微型浮游动物的中型浮游动物捕食的营养级联。丰富的金枪鱼幼虫的研究地点有最浅的深叶绿素最大值和显着的净正浮游植物的增长低于混合层。
Phytoplankton growth and microzooplankton grazing rates were measured in repeated profiles of dilution experiments incubatedin situon a drift array in order to assess microbial production and food web characteristics in the oligotrophic bluefin tuna spawning habitat of the Gulf of Mexico (May peak spawning seasons, 2017–2018). Grazing often exceeded growth with the processes more balanced overall in the surface mixed layer, but biomass accumulated in the mid-euphotic zone. Community production estimates (260–500 mg C m−2day−1) were low compared to similar open-ocean studies in the Pacific Ocean.Prochlorococcuswas a consistent major contributor (113–204 mg C m−2day−1) to productivity, while diatoms and dinoflagellates (2–10 and 4–13 mg C m−2day−1, respectively) were consistently low. Prymnesiophytes, the most dynamic component (34–134 mg C m−2day−1), co-dominated in 2017 experiments. Unexpected imbalances in grazing relative to production were observed for all picoplankton populations (Prochlorococcus,Synechococcusand heterotrophic bacteria), suggesting a trophic cascade in the absence of mesozooplankton predation on large microzooplankton. Study sites with abundant larval tuna had the shallowest deep chlorophyll maxima and significant net positive phytoplankton growth below the mixed layer.
哥斯达黎加穹顶的浮游植物产量和分类单元特定增长率。
DOI: --
发表时间: 2016
影响因子: 2.1
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影响因子: 2.1
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发表时间: 2020
影响因子: 4.5
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寡营养海洋食物网中的蓝鳍金枪鱼幼虫,浮游动物营养物质的调查:BLOOFINZ-墨西哥湾计划概述
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发表时间: 2022
影响因子: 2.1
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Gerard, Trika;Lamkin, John T.;Kelly, Thomas B.;Knapp, Angela N.;Laiz-Carrión, RaÚl;Malca, Estrella;Selph, Karen E.;Shiroza, Akihiro;Shropshire, Taylor A.;Stukel, Michael R.
通讯作者: Stukel, Michael R.