首页> 外文OA文献 >Ecosystem metabolism in salt marsh tidal creeks and ponds : applying triple oxygen isotopes and other gas tracers to novel environments
【2h】

Ecosystem metabolism in salt marsh tidal creeks and ponds : applying triple oxygen isotopes and other gas tracers to novel environments

机译:盐沼沼泽潮汐小溪和池塘中的生态系统代谢:将三氧同位素和其他气体示踪剂应用于新环境

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

Salt marshes are physically, chemically, and biologically dynamic environments found globally at temperate latitudes. Tidal creeks and marshtop ponds may expand at the expense of productive grass-covered marsh platform. It is therefore important to understand the present magnitude and drivers of production and respiration in these submerged environments in order to evaluate the future role of salt marshes as a carbon sink. This thesis describes new methods to apply the triple oxygen isotope tracer of photosynthetic production in a salt marsh. Additionally, noble gases are applied to constrain air-water exchange processes which affect metabolism tracers. These stable, natural abundance tracers complement traditional techniques for measuring metabolism. In particular, they highlight the potential importance of daytime oxygen sinks besides aerobic respiration, such as rising bubbles. In tidal creeks, increasing nutrients may increase both production and respiration, without any apparent change in the net metabolism. In ponds, daytime production and respiration are also tightly coupled, but there is high background respiration regardless of changes in daytime production. Both tidal creeks and ponds have higher respiration rates and lower production rates than the marsh platform, suggesting that expansion of these submerged environments could limit the ability of salt marshes to sequester carbon.
机译:盐沼是全球在温带纬度存在的物理,化学和生物动态环境。潮汐小溪和沼泽顶池塘可能会扩大,但以草覆盖的高产沼泽地平台为代价。因此,重要的是要了解这些淹没环境中目前的生产和呼吸强度及其驱动因素,以便评估盐沼作为碳汇的未来作用。本文描述了在盐沼中应用光合作用的三重氧同位素示踪剂的新方法。另外,稀有气体被施加以约束影响代谢示踪剂的空气-水交换过程。这些稳定的天然丰度示踪剂补充了用于测量代谢的传统技术。特别是,它们突出了除有氧呼吸(例如上升的气泡)以外,白天氧气吸收的潜在重要性。在潮汐小溪中,增加养分可能会增加产量和呼吸作用,而净新陈代谢没有任何明显变化。在池塘中,白天的生产和呼吸也紧密相连,但是无论白天的生产如何变化,背景呼吸都很高。潮汐小溪和池塘都比沼泽平台具有更高的呼吸速率和更低的生产率,这表明这些水下环境的扩展可能会限制盐沼隔离碳的能力。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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