Size-fractionated chlorophyll concentrations, Mississippi Canyon, Gulf of Mexico, spring 2012 and 2013.

Two research cruises, one in 2012 one in 2013, were conducted to continue to monitor the microbial and planktonic communities and to assess rates of particle flux and the rates of removal of PAHs from the system via this process and accumulation of PAHs in bottom sediments. Size-fractionated chlorophyll samples were collected from full water column CDT casts and microzooplankton grazing experiment samples at various stations in the Gulf of Mexico during April 2012 and April 2013. Chlorophyll concentrations were calculated according to EPA Method 445.0. Grazing experiments were carried out according to now-standard dilution method protocols first used by Landry and Hassett (1982).本研究于2012年和2013年实施了两次科考航次，旨在持续监测微生物与浮游生物群落，并评估颗粒通量速率、系统内多环芳烃（Polycyclic Aromatic Hydrocarbons，PAHs）通过该过程的去除速率，以及多环芳烃在海底沉积物中的积累量。2012年4月与2013年4月期间，研究团队在墨西哥湾的多个站位，通过全水深CDT剖面采集了分级粒径叶绿素样品，并采集了微型浮游动物摄食实验样品。叶绿素浓度的计算参照美国环境保护署（EPA）方法445.0执行。微型浮游动物摄食实验遵循兰德里与哈塞特（Landry and Hassett）1982年首次提出的标准化稀释法实验规程开展。