Biochemical investigation of multicorer sediment profile PS74/121-1

To detect and track the impact of large-scale environmental changes in a the transition zone between the northern North Atlantic and the central Arctic Ocean, and to determine experimentally the factors controlling deep-sea biodiversity, the Alfred- Wegener-Institute for Polar and Marine Research (AWI) established the deep-sea long-term observatory HAUSGARTEN, which constitutes the first, and until now only open-ocean long-term station in a polar region. Virtually undisturbed sediment samples have been taken using a video-guided multiple corer (MUC) at 13 HAUSGARTEN stations along a bathymetric (1,000 – 4,000 m water depth) and a latitudinal transect in 2,500 m water depth as well as two stations at 230 and 1,200 m water depth within the framework of the KONGHAU project. Various biogenic sediment compounds were analyzed to estimate the input of organic matter from phytodetritus sedimentation, benthic activities (e.g. bacterial exoenzymatic activity), and the total biomass of the smallest sediment-inhabiting organisms (size range: bacteria to meiofauna).

为检测和追踪北大西洋北部与北冰洋中部过渡带大规模环境变化的影响，并通过实验确定控制深海生物多样性的因素，阿尔弗雷德·韦格纳极地与海洋研究所（Alfred-Wegener-Institute for Polar and Marine Research, AWI）建立了深海长期观测站HAUSGARTEN，该观测站是极地地区首个且迄今为止唯一的开放海洋长期观测站。在KONGHAU项目框架下，研究人员使用视频引导多管取样器（video-guided multiple corer, MUC）在HAUSGARTEN的13个站点采集了几乎未受干扰的沉积物样本，这些站点沿等深线（水深1000–4000米）和2500米水深的纬度断面分布，另有两个站点位于水深230米和1200米处。研究人员分析了多种生物成因沉积物成分，以估算浮游生物碎屑沉降带来的有机物输入、底栖生物活动（如细菌外酶活性）以及最小型沉积物栖息生物（大小范围：细菌至小型底栖生物）的总生物量。