| 报告题名: | Thin layer capping of fjord sediments in Grenland. Chemical and biological monitoring 2009-2013 |
| 作者: | Schaanning, Morten; Beylich, Bjørnar; Raymond, Caroline; Gunnarsson, Jonas S.
|
| 出版者: | Norsk institutt for vannforskning
|
| 出版年: | 2014
|
| 发表日期: | 2014
|
| 国家: | 挪威
|
| 语种: | 英语
|
| 英文关键词: | VDP::Matematikk og naturvitenskap: 400
; VDP::Mathematics and natural scienses: 400
; Bunnfauna / Bottom communities
; Dioksiner / Dioxins
; Naturlige felteksperimenter / Natural field experiments
; Tiltak / Measures
|
| 中文主题词: | 碳
; 广动物区系
; 底栖生态环境
; 沉积物
; 大型土壤动物
; 峡湾
|
| 主题词: | CARBON
; MACROFAUNA
; BENTHIC HABITAT
; SEDIMENTS
; FJORDS
|
| 英文摘要: | A field experiment on thin layer capping was initiated in the Grenland fjords in September 2009. A primary objective
of the field experiment was to assess the capacity of the different cap designs to reduce bioavailability of dioxins as well
as the disturbance and recovery expected of the benthic habitat and macrofauna communities. The test fields were
investigated in samples collected in 2009, shortly after capping, and in 2010, one year after capping. The bioavailability
was determined in box-cores transferred from the test fields to a mesocosm laboratory for ex situ measurements of
uptake of dioxins in sediment-living organisms and passive samplers exposed in the overlying water. The results
showed that caps containing activated carbon effectively reduced the bioavailability of dioxins, but adverse effects were
found on benthic communities. In one of the two test fields treated with activated carbon, the community severely
deteriorated during the first year after capping. In order to follow the further succession of the benthic community and
the degree of sustainment of dioxin immobilization, extended monitoring was performed in 2012 and 2013, 3-4 years
after cap placement. Here we report the results from this latter investigation and compare with the results obtained in
the previous investigations. The new results confirmed maintenance of positive effects of activated carbon on the
bioavailability of dioxins. The benthic habitat appeared to have improved since 2010, but adverse effects were still
present in the macrofauna communities, in particular at one of the test fields treated with activated carbon at which
recovery appeared to have stagnated at about two years after cap placement. |
| URL: | https://brage.bibsys.no/xmlui/bitstream/handle/11250/284003/6724_2014_200dpi.pdf?sequence=4&isAllowed=y
|
| 资源类型: | 研究报告
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/28973
|
| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
|
| File Name/ File Size |
Content Type |
Version |
Access |
License |
|
|---|
| 6724_2014_200dpi.pdf（3744KB） | 研究报告 | -- | 开放获取 | | View
Download
|
|
| Recommended Citation: | |
Schaanning, Morten,Beylich, Bjørnar,Raymond, Caroline,et al. Thin layer capping of fjord sediments in Grenland. Chemical and biological monitoring 2009-2013. 2014-01-01.
|
|
|