Environmental Toxicology and Chemistry
Environmental Toxicology and Chemistry
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DOI：
10.1002/etc.4459
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发表时间：
2019-07
影响因子：
4.1
通讯作者：
Lukas Mustajärvi;I. Nybom;Ann;Kristin Eriksson;Wiklund;E. Eek;G. Cornelissen;Anna Sobeka
中科院分区：
文献类型：
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作者：
Lukas Mustajärvi;I. Nybom;Ann;Kristin Eriksson;Wiklund;E. Eek;G. Cornelissen;Anna Sobeka
在本研究中，最近开发的底栖流动室被用来评估多环芳烃（PAHs）的沉积物-水通量在瑞典波罗的海沿岸的4个站点。流通室允许评估生物扰动对疏水性有机污染物的沉积物-水通量的潜在影响。4个调查点沉积物中生物扰动生物的污染程度和密度各不相同。在4个地点，用流通室测量的单个多环芳烃的通量范围为21和510，11和370，3和9700，以及62和2300 ng m-2 d-1。为了评估生物扰动对沉积物-水通量的潜在影响，在每个地点平行部署了3个流通和封闭室。底栖生物的活动因封闭的底栖室中氧气耗尽而减弱或停止。因此，使用2种不同腔室设计测量的通量差异作为生物扰动可能影响的指示。在生物扰动生物密度高的地点（例如，Marenzelleria spp.，Monoporeia affinis和Macoma balthica，约860-1200个个体m-2），但在生物密度低得多的地点（<200个个体m-2）。一个网站有一个高的生物密度和低的潜在影响的生物扰动，我们假设是由优势的寡毛/多毛类在这个网站，因为蠕虫（Marenzelleria属）。比原生甲壳类和软体动物更深入沉积物。环境毒理化学2019;38：1803-1810。联系我们_SETAC
In the present study a recently developed benthic flow‐through chamber was used to assess the sediment‐to‐water flux of polycyclic aromatic hydrocarbons (PAHs) at 4 sites on the Swedish Baltic Sea coast. The flow‐through chamber allows for assessment of the potential effect of bioturbation on the sediment‐to‐water flux of hydrophobic organic contaminants. The sediments at the 4 investigated sites have both varying contamination degree and densities of bioturbating organisms. The flux of individual PAHs measured with the flow‐through chamber ranged between 21 and 510, 11 and 370, 3 and 9700, and 62 and 2300 ng m–2 d–1 for the 4 sites. To assess the potential effect of bioturbation on the sediment‐to‐water flux, 3 flow‐through and closed chambers were deployed in parallel at each site. The activity of benthic organisms is attenuated or halted because of depletion of oxygen in closed benthic chambers. Therefore, the discrepancy in flux measured with the 2 different chamber designs was used as an indication of a possible effect of bioturbation. A potential effect of bioturbation on the sediment‐to‐water flux by a factor of 3 to 55 was observed at sites with a high density of bioturbating organisms (e.g., Marenzelleria spp., Monoporeia affinis, and Macoma balthica of approximately 860–1200 individuals m–2) but not at the site with much lower organism density (<200 individuals m–2). One site had a high organism density and a low potential effect of bioturbation, which we hypothesize to be caused by the dominance of oligochaetes/polychaetes at this site because worms (Marenzelleria spp.) reach deeper into the sediment than native crustaceans and mollusks. Environ Toxicol Chem 2019;38:1803–1810. © 2019 SETAC