LARISSA: Impact of ice-shelf loss on geochemical profiles and microbial community composition in marine sediments of the Larsen A embayment, Antarctic Peninsula

Ice-shelf loss along the east coast of the Antarctic Peninsula over recent decades has brought new sources of carbon and energy to the marine benthos likely affecting sediment geochemistry and microbial community composition. To better understand the long-term effects of ice-shelf loss on benthic microbial communities, we conducted a five-station survey along a 160 km transect following the historic path of retreat of the Larsen A ice shelf. All microbial community sequence data is publicly available through the Metagenomics Analysis Server at Argonne National Laboratory (MG-RAST). The project title is \"Impact of ice-shelf loss on geochemical profiles and microbial community composition in marine sediments of the Larsen A embayment, Antarctic Peninsula\". A key word search using terms from this title at the MG-RAST portal (http://metagenomics.anl.gov/) will return the complete sample list. This submitted dataset summarizes the measured environmental parameters for these same samples (lat., long., water depth, sediment depth, pH, alkalinity, dissolved oxygen, silicate, phosphate, nitrate, nitrite, and ammonium).

近几十年来，南极半岛东海岸冰架的消失为海洋底栖环境（marine benthos）带来了新的碳源和能源，可能影响沉积物地球化学及微生物群落组成。为深入理解冰架消失对底栖微生物群落的长期效应，我们沿拉森A冰架历史退缩路径，开展了160公里断面的五站位调查。所有微生物群落序列数据均可通过阿贡国家实验室（Argonne National Laboratory）的宏基因组学（Metagenomics）分析服务器MG-RAST公开获取。项目标题为“南极半岛拉森A冰架湾海洋沉积物中冰架消失对地球化学剖面及微生物群落组成的影响”。在MG-RAST门户（网址：http://metagenomics.anl.gov/）使用该标题中的术语进行关键词搜索，即可获取完整样本列表。提交的本数据集汇总了这些样本的实测环境参数，包括纬度、经度、水深、沉积物深度、pH值、碱度、溶解氧、硅酸盐、磷酸盐、硝酸盐、亚硝酸盐及铵盐。