...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine ecology progress series >Dissolved organic matter uptake in a temperate seagrass ecosystem
【24h】

Dissolved organic matter uptake in a temperate seagrass ecosystem

机译：温带海草生态系统中溶解有机物的吸收

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We assessed the utilization of inorganic and organic nitrogen compounds of different complexity by primary producers and bacteria in a seagrass ecosystem. Using double-labeled (~(13)C and ~(15)N) substrates, the net transfers from the dissolved nitrogen and carbon pools to phytoplank-ton, planktonic bacteria, epiphytes, seagrasses (Zostera noltii and Cymodocea nodosa), and a macroalga (Caulerpa prolifera) were quantified in field incubations. Phytoplankton was the largest nitrogen sink, followed by the epiphytic community. In contrast, carbon fixation was dominated by the macrophytes. Although compartment-specific variations existed, NH_4~+ was generally preferred over NO_3~- and urea. Specific uptake rates of individual amino acids were inversely related to their C:N ratio and their structural complexity (glycine > L-leucine > L-phenylalanine). In addition, biomarker-specific measurements (polar lipid-derived fatty acids and D-alanine) indicated increasing bacterial contributions to carbon uptake with increasing amino acid structural complexity. All primary producers acquired nitrogen from a complex pool of algae-derived dissolved organic matter (DOM), but algae-derived dissolved organic carbon (DOC) was almost exclusively used by the planktonic compartment. In contrast, a similar complex pool of bacteria-derived DOM was not taken up in significant quantities by any of the primary producers. Our results illustrate that dissolved organic nitrogen (DON) can provide bioavailable nitrogen to primary producers and bacteria in seagrass ecosystems on very short time-scales, and DON and DOC dynamics are largely uncoupled and must be investigated as 2 separate interacting pools.
机译：我们评估了海草生态系统中初级生产者和细菌对不同复杂程度的无机和有机氮化合物的利用情况。使用双标记（〜（13）C和〜（15）N）底物，净值从溶解的氮和碳库转移到浮游植物，浮游细菌，附生植物，海草（Zostera noltii和Cymodocea nodosa）和在田间温育中对大型藻（Caulerpa prolifera）进行定量。浮游植物是最大的氮汇，其次是附生群落。相反，碳固定主要由大型植物决定。尽管存在特定于室的变化，但NH_4〜+通常优于NO_3〜-和尿素。单个氨基酸的比吸收率与其C：N比及其结构复杂度（甘氨酸> L-亮氨酸> L-苯丙氨酸）成反比。此外，生物标志物特异性检测（极性脂质衍生的脂肪酸和D-丙氨酸）表明，细菌对碳吸收的贡献随着氨基酸结构复杂性的增加而增加。所有初级生产者都从藻类衍生的溶解有机物（DOM）的复杂库中获取了氮，但是藻类衍生的溶解有机碳（DOC）几乎完全被浮游生物所利用。相反，任何初级生产者都没有大量吸收类似的细菌来源的DOM复杂库。我们的结果表明，溶解的有机氮（DON）可以在很短的时间范围内为海草生态系统中的初级生产者和细菌提供生物利用的氮，并且DON和DOC动力学在很大程度上是不耦合的，必须作为两个独立的相互作用池进行研究。

著录项

  • 来源
    《Marine ecology progress series》 |2013年第25期|87-100|共14页
  • 作者

    Tom Van Engeland; Tjeerd J. Bouma; Edward P. Morris; Fernando G. Brun; Gloria Peralta; Miguel Lara; Iris E. Hendriks; Pieter van Rijswijk; Bart Veuger; Karline Soetaert; Jack J. Middelburg;

  • 作者单位

    Royal Netherlands Institute for Sea Research (NIOZ-Yerseke), 440 INT Yerseke, The Netherlands;

    Royal Netherlands Institute for Sea Research (NIOZ-Yerseke), 440 INT Yerseke, The Netherlands;

    Department of Biology (Area of Ecology), Faculty of Environmental and Marine Science, University of Cadiz, 11510 Puerto Real, Cadiz, Spain;

    Department of Biology (Area of Ecology), Faculty of Environmental and Marine Science, University of Cadiz, 11510 Puerto Real, Cadiz, Spain;

    Department of Biology (Area of Ecology), Faculty of Environmental and Marine Science, University of Cadiz, 11510 Puerto Real, Cadiz, Spain;

    Department of Biology (Area of Ecology), Faculty of Environmental and Marine Science, University of Cadiz, 11510 Puerto Real, Cadiz, Spain;

    Mediterranean Institute for Advanced Studies (IMEDEA), 07190 Esporles, Mallorca, Spain;

    Royal Netherlands Institute for Sea Research (NIOZ-Yerseke), 440 INT Yerseke, The Netherlands;

    Royal Netherlands Institute for Sea Research (NIOZ-Yerseke), 440 INT Yerseke, The Netherlands;

    Royal Netherlands Institute for Sea Research (NIOZ-Yerseke), 440 INT Yerseke, The Netherlands;

    Royal Netherlands Institute for Sea Research (NIOZ-Yerseke), 440 INT Yerseke, The Netherlands,Faculty of Geosciences, Utrecht University, 3508 TA Utrecht, The Netherlands;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    dissolved organic matter; seagrass ecosystems; uptake; complexity; phytoplankton; epiphytes; zostera noltii; cymodocea nodosa; caulerpa prolifera;

    机译：溶解的有机物海草生态系统;摄取复杂;浮游植物附生植物诺氏带菌cymodocea nodosa;花椰菜;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号