• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Oceanography and Marine Biology: An Annual Review >QUATERNARY SEA-LEVEL AND PALAEOTIDAL CHANGES: A REVIEW OF IMPACTS ON, AND RESPONSES OF, THE MARINE BIOSPHERE
【24h】

QUATERNARY SEA-LEVEL AND PALAEOTIDAL CHANGES: A REVIEW OF IMPACTS ON, AND RESPONSES OF, THE MARINE BIOSPHERE

机译：第四纪海平面和古猿的变化：对海洋生物的影响和响应的回顾

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Driven by the glacio-eustatic mechanism, Earth is currently experiencing a phase of high-amplitude sea-level cycles as large as any during its history. Since shelf seas only develop during transgres-sive highstands, they are transient, yet they are recognized as disproportionately biologically and biogeochemically significant within Earth's system. This review explores the significance of the transience of the shelf seas by considering impacts on, and responses of, the marine biosphere to Quaternary sea-level cycles and to concomitant palaeotidal changes. Geological evidence for sea-level changes and their simulation by glacio-isostatic adjustment (GIA) models is reviewed, enabling the timing, duration and extent of shelf inundation to be assessed. Biological impacts of sea-level change include adjustments in habitat type and extent, species' distributions, biodiversity and reproductive isolation leading to genetic change. Conflict between physical palaeoenvironmen-tal evidence and molecular marker data indicating cryptic northern glacial refugia in the Northern Hemisphere remains unresolved. Changes in tidal amplitudes and tide-dependent parameters (bed stress, seasonal stratification) in response to sea-level changes can be simulated using palaeotidal and palaeowave models constrained by geological data. Palaeotidal changes have significant impacts on productivity, dispersal and benthic habitat distribution. The balance of production and respiration in shelf seas is altered by changing sea-level and tidal dynamics influencing atmospheric pCO2. The significant potential of GIA, palaeotidal and palaeo-environmental niche modelling approaches for quantifying the biological and biogeochemical impacts of sea-level and palaeotidal change is emphasized.
机译：在冰河恒流机制的驱动下，地球目前正经历着一个高振幅的海平面周期阶段，这一阶段与它历史上的任何一个周期一样大。由于架子海仅在过渡性高潮时期才发生，因此它们是短暂的，但在地球系统中，它们在生物学和生物地球化学上的重要性不相称。这篇综述通过考虑海洋生物圈对第四纪海平面旋回和伴随的古生物变化的影响和响应，探讨了架子海瞬变的重要性。审查了海平面变化的地质证据及其通过冰川等静压调整（GIA）模型进行的模拟，从而可以评估架子被淹的时间，持续时间和程度。海平面变化的生物影响包括栖息地类型和程度，物种分布，生物多样性和导致遗传变化的生殖隔离的调整。物理古环境证据与分子标记数据之间的冲突尚未解决，该数据表明北半球隐秘的北部冰川避难所。可以使用受地质数据约束的古潮汐和古波模型模拟响应海平面变化的潮汐幅值和潮汐相关参数（床应力，季节性分层）的变化。古生物变化对生产力，散布和底栖生境分布有重大影响。通过改变影响大气pCO2的海平面和潮汐动力学，可以改变架子海的生产和呼吸平衡。强调了GIA，古生物和古环境生态位建模方法在量化海平面和古生物变化的生物和生物地球化学影响方面的巨大潜力。

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