首页> 外文学位 >Biogeochemical cycling of carbon and nitrogen by the coral-zooxanthellae symbiosis.
【24h】

Biogeochemical cycling of carbon and nitrogen by the coral-zooxanthellae symbiosis.

机译:珊瑚-草黄体共生作用对碳和氮的生物地球化学循环。

获取原文
获取原文并翻译 | 示例

摘要

Production of dissolved organic carbon (DOC) and nitrogen (DON) by symbiotic corals has been demonstrated. Three coral species were used for this investigation, including Diploria strigosa, Porites astreoides, and Porites divericata. During short-term incubations, the dissolved pools of carbon and nitrogen were monitored; changes in these pools were attributed to the symbiosis. DOM production occurred as several large pulse events overlying a more constant background production. Measured rates of DOC production range from 17 to 37 mug C · cm-2 · day -1 and agree with previously published rates. DOC production represents a significant pathway in the photoautotrophic carbon cycle of these animals. In the three species investigated, DOC production accounts for 11--21% of the dissolved inorganic carbon (DIC) drawdown. Released dissolved organic matter (DOM) tends to be rich in nitrogen, with DOC/DON ratios of 3/1 in both D. strigosa and P. divericata. This nitrogen-rich material, some of which is urea, has the potential to be an important source of carbon and nitrogen to the reef community. Extrapolating measured release rates of urea production for D. strigosa over the entire Bermuda platform, results presented demonstrate that corals are likely a dominant component of the seasonal urea cycle in this reef ecosystem.
机译:已证明共生珊瑚可生产溶解性有机碳(DOC)和氮(DON)。此调查使用了三种珊瑚物种,其中包括Diploria strigosa,Porites astreoides和Porites divericata。在短期孵育过程中,监测了碳和氮的溶解库;这些库的变化归因于共生。 DOM产生是由于几个较大的脉冲事件覆盖了更恒定的背景产生。 DOC的测得速率范围为17至37马克杯C·cm-2·天-1,与先前公布的速率一致。 DOC的产生代表了这些动物光合自养碳循环的重要途径。在所调查的三个物种中,DOC产量占溶解无机碳(DIC)消耗量的11--21%。释放的溶解有机物(DOM)往往富含氮,D。strigosa和P. dipricata中的DOC / DON比为3/1。这种富含氮的物质(其中一些是尿素)有可能成为珊瑚礁群落重要的碳和氮源。外推在整个百慕大平台上测得的粉饰线虫的尿素释放速率,结果表明,珊瑚可能是该礁生态系统中季节性尿素循环的主要组成部分。

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