globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.12854
论文题名:
Decrease in water clarity of the southern and central North Sea during the 20th century
作者: Capuzzo E.; Stephens D.; Silva T.; Barry J.; Forster R.M.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期:6
起始页码: 2206
结束页码: 2214
语种: 英语
英文关键词: Chlorophyll ; Coastal seas ; Long-term changes ; North Sea ; Secchi disk ; Suspended particulate materials ; Water clarity
Scopus关键词: biogeochemistry ; chlorophyll ; coastal zone ; concentration (composition) ; long-term change ; marine ecosystem ; seafloor ; suspended particulate matter ; twentieth century ; Atlantic Ocean ; East Anglia ; England ; North Sea ; United Kingdom ; sea water ; analysis ; climate ; environmental monitoring ; North Sea ; phytoplankton ; procedures ; season ; sediment ; water pollution ; Climate ; Environmental Monitoring ; Geologic Sediments ; North Sea ; Phytoplankton ; Seasons ; Seawater ; Water Pollution
英文摘要: Light in the marine environment is a key environmental variable coupling physics to marine biogeochemistry and ecology. Weak light penetration reduces light available for photosynthesis, changing energy fluxes through the marine food web. Based on published and unpublished data, this study shows that the central and southern North Sea has become significantly less clear over the second half of the 20th century. In particular, in the different regions and seasons investigated, the average Secchi depth pre-1950 decreased between 25% and 75% compared to the average Secchi depth post-1950. Consequently, in summer pre-1950, most (74%) of the sea floor in the permanently mixed area off East Anglia was within the photic zone. For the last 25+ years, changes in water clarity were more likely driven by an increase in the concentration of suspended sediments, rather than phytoplankton. We suggest that a combination of causes have contributed to this increase in suspended sediments such as changes in sea-bed communities and in weather patterns, decreased sink of sediments in estuaries, and increased coastal erosion. A predicted future increase in storminess (Beniston et al., 2007; Kovats et al., 2014) could enhance the concentration of suspended sediments in the water column and consequently lead to a further decrease in clarity, with potential impacts on phytoplankton production, CO2 fluxes, and fishery production. © 2015 John Wiley & Sons Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61833
Appears in Collections:影响、适应和脆弱性

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作者单位: Centre for Environment, Fishery and Aquaculture Science, Cefas, Lowestoft, United Kingdom; Institute of Estuarine and Coastal Studies (IECS), University of Hull, Hull, United Kingdom

Recommended Citation:
Capuzzo E.,Stephens D.,Silva T.,et al. Decrease in water clarity of the southern and central North Sea during the 20th century[J]. Global Change Biology,2015-01-01,21(6)
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