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Cruise report: regional assessment of ecosystem condition and stressor impacts along the northeastern Gulf of Mexico shelf; NOAA Ship Nancy Foster NF-10-09-RACOW (August 13-21, 2010)

机译:巡游报告:对墨西哥湾东北部大陆架沿线生态系统状况和压力源影响的区域评估; NOAA船南希·福斯特NF-10-09-RACOW(2010年8月13日至21日)

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摘要

This cruise report is a summary of a field survey conducted along the continental shelf of the northeastern Gulf of Mexico (GOM), encompassing 70,062 square kilometers of productive marine habitats located between the Mississippi Delta and Tampa Bay, August 13–21, 2010 on NOAA Ship Nancy Foster Cruise NF-10-09-RACOW. Synoptic sampling of multiple ecological indicators was conducted at each of 50 stations throughout these waters using a random probabilistic sampling design. At each station samples were collected for the analysis of benthic community structure and composition; concentrations of chemical contaminants (metals, pesticides, TPHs, PAHs, PCBs, PBDEs) in sediments and target demersal biota; sediment toxicity; nutrient and chlorophyll levels in the water column; and other basic habitat characteristics such as depth, salinity, temperature, dissolved oxygen, turbidity, pH, CDOM fluorescence, sediment grain size, and organic carbon content. Discrete water samples were collected just below the sea surface, in addition to any deeper subsurface depths where there was an occurrence of suspicious CDOM fluorescence signals, and analyzed for total BTEX/TPH and carcinogenic PAHs using immunoassay test kits. Other indicators of potential value from a human-dimension perspective were also recorded, including presence of any vessels, oil rigs, surface trash, visual oil sheens in sediments or water, marine mammals, or noxious/oily sediment odors.ududThe overall purpose of the survey was to collect data to assess the status of ecosystem condition and potential stressor impacts throughout the region, based on these various indicators and corresponding management thresholds, and to provide this information as a baseline for determining how such conditions may be changing with time. In addition to the original project goals, both the scientific scope and general location of this project are relevant to addressing potential ecological impacts of the Deepwater Horizon oil spill. While sample analysis is still ongoing, a few preliminary results and observations are reported here. A final report will be completed once all data have been processed.
机译:这份航行报告是对墨西哥东北部(GOM)大陆架进行的野外调查的摘要,该野外调查于2010年8月13日至21日在密西西比河三角洲和坦帕湾之间的70,062平方公里的生产性海洋栖息地上,NOAA南希·福斯特(Nancy Foster)邮轮NF-10-09-RACOW。使用随机概率抽样设计在这些水域的50个站点中的每个站点进行了多个生态指标的概要采样。在每个站点收集样本,以分析底栖动物群落的结构和组成;沉积物和目标海底生物区系中化学污染物(金属,农药,TPH,PAH,PCB,PBDEs)的浓度;沉积物毒性水柱中的营养和叶绿素水平;以及其他基本的栖息地特征,例如深度,盐度,温度,溶解氧,浊度,pH,CDOM荧光,沉积物粒径和有机碳含量。除了出现可疑CDOM荧光信号的任何更深的地下深度以外,还收集了海面以下的离散水样本,并使用免疫分析试剂盒分析了总BTEX / TPH和致癌的PAH。从人的角度来看,还记录了其他潜在价值指标,包括是否存在任何船只,抽油装置,地面垃圾,沉积物或水中的可见油污,海洋哺乳动物或有毒/油性沉积物气味。 ud ud该调查的目的是基于这些各种指标和相应的管理阈值,收集数据以评估整个地区的生态系统状况和潜在的压力源影响,并提供此信息作为确定此类状况如何随时间变化的基准。时间。除了最初的项目目标外,该项目的科学范围和总体位置都与解决“深水地平线”溢油的潜在生态影响有关。尽管样品分析仍在进行中,但此处报告了一些初步结果和观察结果。处理完所有数据后,最终报告将完成。

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