globalchange  > 气候减缓与适应
DOI: 10.3354/ame01883
WOS记录号: WOS:000446361600005
论文题名:
Differential responses of bacteria to diatom-derived dissolved organic matter in the Arctic Ocean
作者: Dadaglio, Laetitia1; Dinasquet, Julie1,2; Obernosterer, Ingrid1; Joux, Fabien1
通讯作者: Joux, Fabien
刊名: AQUATIC MICROBIAL ECOLOGY
ISSN: 0948-3055
EISSN: 1616-1564
出版年: 2019
卷: 82, 期:1, 页码:59-72
语种: 英语
英文关键词: Arctic Ocean ; Sea ice ; Diatom-derived organic matter ; Biodegradation ; Bacterial growth ; Bacterial diversity ; 16S rRNA sequencing
WOS关键词: EXTRACELLULAR POLYMERIC SUBSTANCES ; SEA-ICE ; MARINE BACTERIOPLANKTON ; MICROBIAL COMMUNITIES ; MULTIVARIATE ANALYSES ; PHYTOPLANKTON BLOOMS ; PROTEIN-SYNTHESIS ; COASTAL WATERS ; FLOW-CYTOMETRY ; DIVERSITY
WOS学科分类: Ecology ; Marine & Freshwater Biology ; Microbiology
WOS研究方向: Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Microbiology
英文摘要:

The Arctic sea ice cover is undergoing an unprecedented decline due to climate change. This loss may result in the earlier start of ice algae blooms and more intense phyto-plankton blooms, leading to higher concentrations of dissolved organic matter (DOM) derived from primary production. We investigated the response of early summer Arctic bacterial communities to the addition of Arctic diatom-derived DOM through biodegradation experiments in Baffin Bay. DOM produced by the planktonic diatom Chaetoceros neogracilis and the sea ice diatom Fragilariopsis cylindrus was added to seawater from 3 stations with different ice cover (2 ice zones and 1 open water zone) for 12 d. At the 3 stations, the addition of inorganic nutrients (PO4 and NO3) was not sufficient to stimulate bacterial growth compared to the controls, suggesting that bacteria were mainly limited by organic carbon. The addition of DOM from C. neogracilis stimulated bacterial abundance and production, with a more pronounced response in the ice zone compared to the open water zone. The enhanced bacterial metabolism was ac companied by changes in the bacterial community composition determined by 16S rRNA sequencing, driven by operational taxonomic units (OTUs) related to Pseudoalteromonas and Polaribacter that increased in relative abundance with DOM addition. Moreover, in the ice zone, DOM from C. neogracilis induced a priming effect on the bacterial utilization of ambient DOM. Our findings suggest that phytoplankton blooms, through the production of labile organic matter, will strongly affect bacterial heterotrophic activity, composition and dissolved organic carbon cycling in the Arctic Ocean.


Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/127478
Appears in Collections:气候减缓与适应

Files in This Item:

There are no files associated with this item.


作者单位: 1.Sorbonne Univ, CNRS, Lab Oceanog Microbienne LOMIC, Observ Oceanol Banyuls, F-66650 Banyuls Sur Mer, France
2.UCSD, Scripps Inst Oceanog, Marine Biol Res Div, La Jolla, CA 92037 USA

Recommended Citation:
Dadaglio, Laetitia,Dinasquet, Julie,Obernosterer, Ingrid,et al. Differential responses of bacteria to diatom-derived dissolved organic matter in the Arctic Ocean[J]. AQUATIC MICROBIAL ECOLOGY,2019-01-01,82(1):59-72
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Dadaglio, Laetitia]'s Articles
[Dinasquet, Julie]'s Articles
[Obernosterer, Ingrid]'s Articles
百度学术
Similar articles in Baidu Scholar
[Dadaglio, Laetitia]'s Articles
[Dinasquet, Julie]'s Articles
[Obernosterer, Ingrid]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Dadaglio, Laetitia]‘s Articles
[Dinasquet, Julie]‘s Articles
[Obernosterer, Ingrid]‘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.