Plankton dynamics and geochemistry of Beaver Lake

Preliminary Metadata record for data expected from ASAC Project 2324See the link below for public details on this project.---- Public Summary from Project ----Epishelf lakes are freshwater lakes situated adjacent to ice-shelves. Their basins continue beneath the ice-shelf, thereby providing hydraulic connection to the sea. Recent work (Laybourn-Parry et al., 2001) on Beaver Lake (Eastern Antarctica) has demonstrated that epishelf lakes are ecosystems on the edge of existence, and that their populations of largely microbial organisms live under permanent stress. It has been suggested that epishelf lakes are old and have acted as refugia for Antarctic organisms. Thus one might expect to find that a significant component of their biota has a circum-polar distribution. Our approach has two main aims, firstly to examine the biodiversity of the microbial plankton using molecular techniques, and secondly to produce models of carbon cycling in the water column for the summer, thereby elucidating the functional dynamics of the plankton community.There are two files available for download from the URL given below. One is a text document detailing the methods used in the collection of these data, and the other is an excel spreadsheet of these data.The fields in this dataset are:DateDepthIce DepthTemperaturePARDOCTOCAmmoniumNitrateSRPChlorophyllBacteriaVirusesHNANPNANCiliateAskenasiaMonodiniumscuticociliatesStrombidiumMesodiniumZooplanktonBoeckellaPrimary ProductionBacterial Production

ASAC项目2324号预期数据的初步元数据记录，有关该项目的公开详情请参阅下述链接。
——项目公开摘要——
冰架毗邻湖（epishelf lake）是毗邻冰架的淡水湖泊，其湖盆延伸至冰架下方，由此与海洋形成水力连通。针对南极东部比弗湖（Beaver Lake）的近期研究（Laybourn-Parry等，2001）表明，冰架毗邻湖是处于生存边缘的生态系统，其主导的微生物类群始终处于生存压力之下。有研究提出，冰架毗邻湖历史悠久，曾是南极生物的避难所，因此可推测，其生物群落中有相当比例的类群具有环极地分布特征。
本研究的方法包含两大核心目标：其一，借助分子技术探究微型浮游生物的生物多样性；其二，构建夏季水体碳循环模型，以此阐明浮游生物群落的功能动态。
下述链接提供两份文件供下载：其一为详述该数据集采集方法的文本文档，其二为包含该数据集的Excel电子表格。
本数据集包含以下字段：
日期
深度
冰层厚度
水温
光合有效辐射（PAR）
溶解氧（DO）
电导率（CT）
有机碳（OC）
铵态氮
硝态氮
可溶性活性磷（SRP）
叶绿素
细菌
病毒
高核酸类微生物（HNA）
PNP
NPNA
纤毛虫
阿克西虫属（Askenasia）
单甲藻属（Monodinium）
盾纤毛虫类（scuticociliates）
纺锤纤毛虫属（Strombidium）
中缢虫属（Mesodinium）
浮游动物
博克虫属（Boeckella）
初级生产力
细菌生产力