globalchange  > 气候变化与战略
DOI: 10.1029/2018GB006068
论文题名:
Factors Regulating Nitrification in the Arctic Ocean: Potential Impact of Sea Ice Reduction and Ocean Acidification
作者: Shiozaki T.; Ijichi M.; Fujiwara A.; Makabe A.; Nishino S.; Yoshikawa C.; Harada N.
刊名: Global Biogeochemical Cycles
ISSN: 0886-6236
EISSN: 1944-9224
出版年: 2019
卷: 33, 期:8
语种: 英语
英文关键词: acidification ; ammonium ; halocline ; light intensity ; nitrification ; nitrogen cycle ; reduction ; sea ice ; substrate ; Arctic Ocean ; Atlantic Ocean
学科: Arctic Ocean ; nitrification ; nitrogen cycling ; ocean acidification ; sea ice reduction
中文摘要: Nitrification is susceptible to changes in light and pH and, thus, could be influenced by recent sea ice reductions and acidification in the Arctic Ocean. We investigated the sensitivity of nitrification to light, pH, and substrate availability in a natural nitrifier community of the Arctic Ocean. Nitrification was active near the bottom of the shelf region (<60 m) and in the halocline layer (50–200 m) of the Arctic basin, where ammonium was abundant, but was low in the ammonium-depleted Atlantic layer (>250 m). In pH control experiments, nitrification rates significantly declined when the pH was manipulated to be 0.22 lower than the controls. However, nitrification was relatively insensitive to changes in pH compared to changes in light. Light control experiments showed that nitrification was inhibited by a light intensity above 0.11 mol photons m−2 day−1, which was presumably the light threshold. A light intensity greater than the light threshold extended to the shelf bottom and upper halocline layer, limiting nitrification in these waters. Satellite data analyses indicated that the area where light levels inhibit nitrification has increased throughout the Arctic Ocean due to the recent sea ice reduction, which may lead to a declining trend in nitrification. Our results suggest that stronger light levels in the future Arctic Ocean could further suppress nitrification and alter the composition of inorganic nitrogen, with implications for the structure of ecosystems. ©2019. The Authors.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160112
Appears in Collections:气候变化与战略

Files in This Item:

There are no files associated with this item.


作者单位: Earth Surface System Research Center, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan; Atmosphere and Ocean Research Institute, The University of Tokyo, Chiba, Japan; Institute of Arctic Climate and Environment Research, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan; Project Team for Development of New-generation Research Protocol for Submarine Resources, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan; Department of Biogeochemistry, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan

Recommended Citation:
Shiozaki T.,Ijichi M.,Fujiwara A.,et al. Factors Regulating Nitrification in the Arctic Ocean: Potential Impact of Sea Ice Reduction and Ocean Acidification[J]. Global Biogeochemical Cycles,2019-01-01,33(8)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Shiozaki T.]'s Articles
[Ijichi M.]'s Articles
[Fujiwara A.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Shiozaki T.]'s Articles
[Ijichi M.]'s Articles
[Fujiwara A.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Shiozaki T.]‘s Articles
[Ijichi M.]‘s Articles
[Fujiwara A.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.