Sediment bioturbation photographs from the antFOCE (Antarctic Free Ocean Carbon Enrichment) experiment at Casey Station

Refer to antFOCE report section 4.4.5 for deployment, sampling and analysis details.https://data.aad.gov.au/metadata/records/AAS_4127_antFOCE_Project4127One camera and flash unit was mounted on the top middle section of each chamber to take one photo of the sediment every 30 minutes. The download file contains two folders with the photos taken from the 28th of January to the 23rd of February 2015 – one for Chamber A and one for Chamber C. A video time-lapse compilation of the Chamber A images is also included. Malfunctioning cameras deployed on Chamber A and C and on B and D during this same period and at other times, meant that no useful images were obtained. Background The antFOCE experimental system was deployed in O'Brien Bay, approximately 5 kilometres south of Casey station, East Antarctica, in the austral summer of 2014/15. Surface and sub-surface (in water below the sea ice) infrastructure allowed controlled manipulation of seawater pH levels (reduced by 0.4 pH units below ambient) in 2 chambers placed on the sea floor over natural benthic communities. Two control chambers (no pH manipulation) and two open plots (no chambers, no pH manipulation) were also sampled to compare to the pH manipulated (acidified) treatment chambers. Details of the antFOCE experiment can be found in the report – "antFOCE 2014/15 – Experimental System, Deployment, Sampling and Analysis". This report and a diagram indicating how the various antFOCE data sets relate to each other are available at:https://data.aad.gov.au/metadata/records/AAS_4127_antFOCE_Project4127

有关部署、采样与分析的详细信息，请参阅antFOCE报告第4.4.5节。相关元数据链接：https://data.aad.gov.au/metadata/records/AAS_4127_antFOCE_Project4127

每个实验舱的顶部中段均安装了一台相机与闪光灯单元，每30分钟拍摄一张沉积物照片。

下载文件包含两个文件夹，分别存储2015年1月28日至2月23日期间拍摄的照片：一个对应实验舱A，另一个对应实验舱C。此外还附带了实验舱A照片的延时视频合成文件。

同期及其他时段部署在实验舱A、C、B与D上的相机均出现故障，未能获取有效图像。

背景：antFOCE实验系统于2014/2015年南极夏季部署在东南极洲凯西站以南约5公里的奥布莱恩湾。该系统的海面及冰下（海冰下方水体）基础设施可对放置在海底自然底栖生物群落上方的两个实验舱的海水pH值进行可控调控（相较于环境水平降低0.4个pH单位）。同时设置了两个对照实验舱（不进行pH调控）以及两个开放样地（无实验舱、不进行pH调控），用于与酸化处理实验舱进行对比。

antFOCE实验的详细信息可参阅报告《antFOCE 2014/15 – Experimental System, Deployment, Sampling and Analysis》。该报告以及展示各antFOCE数据集相互关联关系的示意图可通过以下链接获取：https://data.aad.gov.au/metadata/records/AAS_4127_antFOCE_Project4127