SRE4 Metals in treatment Oils

Sediment Recruitment Experiment 4 (SRE4) was a large, long term (5 year) field experiment run at Casey Station (from 2001 to 2006) testing the effects of 4 different hydrocarbons on marine sediment ecosystems. Four different types of hydrocarbons were individually mixed with defaunated marine sediments and deployed in trays on the seabed at O'Brien Bay-1. Trays were collected after deployment periods of 5 weeks, 56 weeks, 62 weeks, 2 years and 5 years. In addition there was a bioturbation treatment using the burrowing urchin Abatus (at 56 weeks only). Samples were collected from 4 replicate trays of each treatment at each sampling time. Analyses were done of sediment hydrocarbon chemistry, microbial communities, meiofaunal communities, macrofaunal communities and diatom communities. The hydrocarbon treatments were: a synthetic Mobil lubricating oil; the same Mobil lubricating oil after 125? hours use in a vehicle engine; a Fuchs synthetic lubricating oil marketed as highly biodegradable; and Special Antarctic Blend diesel fuel (SAB). A control uncontaminated sediment treatment was used for comparison.

沉积物招募实验4（Sediment Recruitment Experiment 4，SRE4）是一项于2001年至2006年在凯西站（Casey Station）开展的大型长期野外实验，实验周期长达5年，旨在探究4种不同烃类物质对海洋沉积物生态系统的影响。实验将4种不同烃类分别与脱除底栖生物的海洋沉积物混合，随后放置于奥布莱恩湾1号（O'Brien Bay-1）的海底实验托盘内。分别在部署时长为5周、56周、62周、2年及5年时回收托盘。此外，实验还设置了一项仅在56周采样节点开展的生物扰动处理，采用穴居海胆Abatus进行操作。每个采样时间点下，每种处理组均设置4个重复托盘，从中采集实验样本。后续分析涵盖沉积物烃类化学组成、微生物群落、小型底栖生物群落、大型底栖生物群落以及硅藻群落。本次实验的烃类处理组包括：合成型美孚润滑油；经汽车发动机使用125小时后的同款美孚润滑油；以高生物降解性为宣传卖点的福斯合成润滑油；以及特种南极混合柴油（Special Antarctic Blend diesel fuel，SAB）。同时设置未受污染的对照组沉积物，用于与各处理组进行对照比较。