...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ecosystems >Carbon Exports from Terrestrial Ecosystems: A Critical-Zone Framework
【24h】

Carbon Exports from Terrestrial Ecosystems: A Critical-Zone Framework

机译：陆地生态系统的碳出口：一个关键区域框架

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

In terrestrial ecosystems, vascular plants photosynthesize and respire to produce organic matter and CO2, respectively. Fractions of these products dissolve and are processed belowground to become dissolved organic carbon (DOC) and dissolved inorganic carbon (DIC) for export in landscape drainage to receiving inland waters. This paper gathers findings from across the Earth and ecological sciences to assemble a simple framework explaining the interplay among these processes in the critical zone (CZ), the skin of Earth from the top of the vegetation canopy through soil and subsoil to the base of active groundwater circulation. In this framework, chemical weathering, that is the dissolution of soil and subsoil mineral material, is a keystone process fueling carbon and energy flow through the system. The ecologic function of weathering dynamically generates nutrients positively feeding back into biosynthesis (and DOC generation) supporting heterotrophy. Root and heterotrophic respiration in turn drive the geologic function of weathering, entraining and stabilizing CO2 in solution (DIC generation) for storage in the hydrosphere and lithosphere. The CZ framework supports straightforward explanations of spatiotemporal patterns of DOC and DIC exports from catchments, including how they differentially respond to hydrologic and ecosystem development dynamics. Mechanisms that generate and export dissolved C also fuel and affect dynamics of stream emission of CO2 to the atmosphere. At larger time scales, terrestrial C-export rates and dynamics co-evolve with CZ development and disturbance. Ultimately terrestrial C exports are plate-tectonically and thermostatically capped and floored by volcanic CO2 production and carbonate chemistry in Earth's crust.
机译：在陆地生态系统中，血管植物光合作用和呼吸分别产生有机物和CO2。这些产品的级分溶解并在地下处理，以使溶解的有机碳（DOC）和溶解的无机碳（DIC）出口，以在横向排水中出口，以接受内陆水域。本文从地球和生态科学聚集了一个简单的框架，以弥补临界区（CZ）中这些过程中这些过程之间的相互作用，从植被冠层的顶部通过土壤和底层到活跃的基础地下水循环。在该框架中，化学风化，即土壤和骨质矿物质的溶解，是燃料碳和能量流过系统的梯形工艺。风化的生态功能动态地产生正面喂回的生物合成（和DOC生成）的营养物质产生营养物质。根和异养呼吸反过来驱动风化，夹带和稳定CO2的地质函数在溶液（DIC代）中用于储存水层和岩石圈。 CZ框架支持直接解释的Doc和DIC从集水区的出口的速度，包括如何差异地响应水文和生态系统发展动态。产生和导出溶解的机制也燃料并影响二氧化碳流排放的动态和影响大气的动态。在较大的时间尺度，地面C-出口率和动态与CZ开发和干扰共同发展。最终的陆地C导出是由地壳中的火山二氧化碳生产和碳酸盐化学的板构造和恒温覆盖和地板。

著录项

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