Microbialites as environmental archives from 16 ka BP to the present

微生物岩作为 16 ka BP 至今的环境档案

• 批准号: 63444706
• 负责人: Professorin Dr. Hildegard Westphal
• 金额: --
• 依托单位: Leibniz-Zentrum für Marine Tropenforschung (ZMT)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2008
• 资助国家: 德国
• 起止时间: 2007-12-31 至 2011-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/63444706?language=en
• 关键词: Microbialites; environmental; archives; 16; ka

The proposed project is designed to study the microbialites of French Polynesian reefs as environmental archives in a quasi-continuous record from the post-LGM to the present. The aim is to create a consistent database for different sea-level situations and different hinterland types that will help to unravel the wealth of environmental information stored in microbialites. During IODP Expedition #310 ("Tahiti sea-level"), a reefal record from the end of the Last Glacial Maximum to 10,000 years BP was recovered that shows the peculiarity of being volumetrically dominated by microbialites. These microbialites are currently being studied by the proponent. Previous work by French colleagues focused on cores that had recovered younger reef material ("Papeete cores"; around 13,800-3000 years), and on samples from the modem environment. The proposed study has two aims: (1) closing the gap between 3000 years and the present; (2) creating comparability of the databases of all time slices. Ultimately this will help to better understand (1) the distribution of microbialites through the time interval studied, (2) changes in microbial communities, and (3) the environmental significance of microbialite occurrences.

拟议项目的目的是研究法属波利尼西亚珊瑚礁的微生物，作为从末次冰期后到现在的准连续记录中的环境档案。其目的是为不同的海平面情况和不同的内陆类型创建一个一致的数据库，这将有助于揭示存储在微生物中的丰富的环境信息。在IODP远征#310（“塔希提海平面”）期间，恢复了从末次冰期最大期结束到10，000年BP的珊瑚礁记录，显示了微生物岩在体积上占主导地位的特点。这些微生物目前正在由提议者进行研究。法国同事先前的工作主要集中在已经恢复了较年轻的珊瑚礁物质（“帕皮提核心”;大约13，800 -3000年）的核心，以及现代环境的样本。这项研究有两个目的：（1）缩小3000年与现在之间的差距;（2）建立所有时间段数据库的可比性。最终，这将有助于更好地了解（1）通过研究的时间间隔微生物的分布，（2）微生物群落的变化，以及（3）微生物发生的环境意义。