...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine ecology progress series >Biogenic structures and cable bacteria interactions: redox domain residence times and the generation of complex pH distributions
【24h】

Biogenic structures and cable bacteria interactions: redox domain residence times and the generation of complex pH distributions

机译：生物结构和电缆细菌相互作用：氧化还原结构域停留时间和复杂pH分布的产生

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

Cable bacteria are multicellular filamentous bacteria that conduct electrons nonlocally between anoxic and oxic sediment regions, creating characteristic electrogenic pH fingerprints. These microbes aggregate in 3D patterns near biogenic structures, and filament fragments are also dispersed throughout deposits. Utilizing pH-sensitive planar optodes to investigate the dynamic response of electrogenic pH fingerprints to sediment reworking, we found that mobile bioturbators like nereid polychaetes (ragworms) can disturb the pH signatures. Sudden sediment disturbance associated with burrows at sub- to multi-centimeter scales eliminates detection of pH signatures. However, electrogenic pH fingerprints can recover in as little as 13 h near abandoned, closed burrows. Sequential collapse and regeneration of electrogenic pH fingerprints are associated with occupied and dynamic burrow structures, with the response time positively related to the scale of disturbance. In the case of relatively stable tube structures, built by benthos like spionid polychaetes and extending mm to cm into deposits, the electrogenic pH fingerprint is evident around the subsurface tubes. Cable filaments clearly associate with subsurface regions of enhanced solute exchange (oxidant supply) and relatively stable biogenic structures, including individual tubes and patches of tubes (e.g. made by Sabaco, a bamboo worm). Physically stable environments, favorable redox gradients, and enhanced organic/inorganic substrate availability promote the activity of cable bacteria in the vicinity of tubes and burrows. These findings suggest complex interactions between electrogenic activity fingerprints and species-specific patterns of bioturbation at multiple spatial and temporal scales, and a substantial impact of electrogenic metabolism on subsurface pH and early diagenetic reaction distributions in bioturbated deposits.
机译：电缆细菌是多细胞丝状细菌，在缺氧和沉积物区域之间进行电子进行电子，产生特征的电泳pH指纹。这些微生物在近生物结构附近的3D模式聚集，并且灯丝片段也分散在整个沉积物中。利用pH敏感的平面光电图调查电素指纹与沉积物返工的动态响应，我们发现移动生物风格如整体聚氯乙烯（rggworms）可以扰乱pH签名。突然与级级级级别相关的沉积物扰动消除了pH签名的检测。然而，电素pH指纹可以在遗弃的闭洞附近的13小时内恢复。发次塌陷和电致指纹的再生与占用和动态的洞穴结构相关联，响应时间与干扰的规模正相关。在相对稳定的管结构的情况下，由诸如Spionid PolyChaetes的Benthos构建并将Mm延伸到沉积物中，电影pH指纹在地下管周围是显而易见的。电缆长丝清楚地与增强型溶质交换（氧化剂供应）和相对稳定的生物结构的地下区域相关联，包括单独管和管子（例如由Sabaco制造的竹虫）。物理稳定的环境，有利的氧化还原梯度，增强的有机/无机基板可用性促进了管和洞穴附近的电缆细菌的活性。这些发现表明了在多个空间和时间尺度的生物和生物尺度的生物扰动的特异性特异性模式之间的复杂相互作用，以及生物扰动沉积物中的地下pH和早期成岩性反应分布的电气代谢的显着影响。

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