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首页> 外文期刊>Marine biology >The role of fungi in processing marine organic matter in the upwelling ecosystem off Chile
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The role of fungi in processing marine organic matter in the upwelling ecosystem off Chile

机译：智利沿海上升生态系统中真菌在处理海洋有机物中的作用

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摘要

In a study that spanned from March 2007 through November 2009, we report high fungal biomass and over 90% of extracellular enzymatic activity occurring in the size classes dominated by fungi during periods of high autotrophic biomass in surface waters of the upwelling ecosystem off central-southern Chile (36°30.80'S-73°07.70'W). Fungal biomass in the water column was determined by the abundance of hyphae and was positively correlated with the concentration of the fungal biomarker 18:2ω6. High fungal biomass during active upwelling periods was comparable to that of prokaryotes (bacteria plus archaea) and was associated with an increase in phy-toplankton biomass and in extracellular enzymatic hydrolysis in waters from the depth of maximum fluorescence. We show fungi as a new microbial component in the coastal upwelling ecosystem of the Humboldt Current System off central Chile. Our results suggest that the temporal pattern in fungal biomass in the water column during a year cycle is a reflection of their capacity to hydrolyze organic polymers and, in consequence, fungal biomass and activity respond to a seasonal cycle of upwelling in this ecosystem.
机译：在一项从2007年3月到2009年11月的研究中，我们报告了中南部南部上升流生态系统地表水中自养生物量较高的时期，真菌高生物量和90％以上的细胞外酶活性发生在以真菌为主的大小类别中。智利（36°30.80'S-73°07.70'W）。水柱中的真菌生物量取决于菌丝的丰度，并且与真菌生物标记物18：2ω6的浓度呈正相关。在活跃的上升流时期，高真菌生物量可与原核生物（细菌加古细菌）相媲美，并且与浮游植物生物量的增加以及从最大荧光深度开始的水中细胞外酶水解有关。我们将真菌显示为智利中部洪堡洋流系统沿海上升生态系统中的一种新型微生物成分。我们的结果表明，一年周期中水柱中真菌生物量的时间模式反映了它们水解有机聚合物的能力，因此，真菌生物量和活性响应了该生态系统中上升季节的周期性。

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  • 来源
    《Marine biology》 |2011年第1期|p.205-219|共15页
  • 作者

    M. H. Gutierrez; S. Pantoja; E. Tejos; R. A. Quinones;

  • 作者单位

    Graduate Program in Oceanography, Department of Oceanography, University of Concepcion, P. O. Box 160-C, Concepcion, Chile,Program of Marine Research of Excellence (PIMEX-Nueva Aldea), Faculty of Natural and Oceanographic Sciences, University of Concepcion, P. O. Box 160-C, Concepcion, Chile;

    Department of Oceanography and Center for Oceanographic Research in the Eastern South Pacific, University of Concepcion, P. O. Box 160-C, Concepcion, Chile,Program of Marine Research of Excellence (PIMEX-Nueva Aldea), Faculty of Natural and Oceanographic Sciences, University of Concepcion, P. O. Box 160-C, Concepcion, Chile;

    Program of Marine Research of Excellence (PIMEX-Nueva Aldea), Faculty of Natural and Oceanographic Sciences, University of Concepcion, P. O. Box 160-C, Concepcion, Chile;

    Department of Oceanography and Center for Oceanographic Research in the Eastern South Pacific, University of Concepcion, P. O. Box 160-C, Concepcion, Chile,Program of Marine Research of Excellence (PIMEX-Nueva Aldea), Faculty of Natural and Oceanographic Sciences, University of Concepcion, P. O. Box 160-C, Concepcion, Chile;

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