Microbialites as environmental archives from 16 ka BP to the present

拟建项目旨在研究法属波利尼西亚珊瑚礁的微生物群落，作为从lgm后到现在的准连续记录的环境档案。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，这将有助于揭示储存在微生物中丰富的环境信息。在IODP考察#310（“塔希提海平面”）期间，从末次盛冰期结束到距今1万年的珊瑚礁记录被恢复，显示了微生物生物在体积上占主导地位的特点。倡议者目前正在研究这些微生物。法国同事先前的工作集中在恢复了较年轻珊瑚礁物质的岩芯（“帕皮提岩芯”；大约13,800-3000年），以及来自现代环境的样本上。提出的研究有两个目的：(1)缩小3000年与现在之间的差距；(2)建立各时间片数据库的可比性。最终，这将有助于更好地理解(1)微生物岩在研究时间间隔内的分布，(2)微生物群落的变化，以及(3)微生物岩发生的环境意义。

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.