Arid
DOI10.1016/j.csr.2018.03.003
Atmospheric bulk deposition of dissolved nitrogen, phosphorus and silicate in the Gulf of Gabes (South Ionian Basin); implications for marine heterotrophic prokaryotes and ultraphytoplankton
Khammeri, Yosra1,2; Hamza, Ismail Sabeur1; Zouari, Amel Bellaaj1; Hamza, Asma1; Sahli, Emna1; Akrout, Fourat1; Ben Kacem, Mohamed Yassine1; Messaoudi, Sabri2; Hassen, Malika Bel1
通讯作者Hassen, Malika Bel
来源期刊CONTINENTAL SHELF RESEARCH
ISSN0278-4343
EISSN1873-6955
出版年2018
卷号159页码:1-11
英文摘要

Monthly variability of atmospheric deposition of dissolved nitrogen, phosphorus and silicate was assessed during the year period from June 2014 to May 2015 in the Gulf of Gabes, situated near the most active source of dust. Nutrient concentrations, ultraphytoplankton < 10 mu m and heterotrophic prokaryotes abundances were simultaneously investigated in the surface coastal water near the sampling site. Results showed that most of the bulk nutrient deposition (more than 66%) occurred during wet season, from October to February, characterized by air masses originating from the Tunisian desert. Dissolved Inorganic Nitrogen (DIN) deposition was very low, whereas Dissolved Inorganic Phosphorus (DIP) bulk deposition was within the range of that observed in the Eastern Mediterranean. High organic nitrogen (30.47%) and phosphorus (83,5%) content contributed to the bulk nitrogen and phosphorus deposition respectively. Months marked by high deposition were accompanied by an increase of carbon biomass from picophytoplankton, Synecococcus and heterotrophic prokaryotes while nano-phytoplankton biomass decreased from 62.38% to 43.39% towards the wet season. During the wet season, heterotrophic prokaryotes become the first contributors to the carbon biomass in the surface water. This suggests a possible contribution of bacteria to the organic nutrient pool driven by atmospheric deposition or/and a reinforcement of the heterotrophic character of the system due to the organic content mineralization processes.


英文关键词Nutrients deposition Saharan dust Heterotrophic prokaryotes Ultraphytoplankton Gulf of Gabes
类型Article
语种英语
国家Tunisia
收录类别SCI-E
WOS记录号WOS:000430889600001
WOS关键词EASTERN MEDITERRANEAN SEA ; SAHARAN DUST ; COMMUNITY COMPOSITION ; BACTERIAL PRODUCTION ; ORGANIC NITROGEN ; WATER-COLUMN ; LOW NUTRIENT ; WESTERN ; INPUT ; AEROSOL
WOS类目Oceanography
WOS研究方向Oceanography
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/208490
作者单位1.INSTM, 28 Rue 2 Mars 1934, Salammbo 2025, Tunisia;
2.Fac Sci Bizerte, Jarzouna 7021, Tunisia
推荐引用方式
GB/T 7714
Khammeri, Yosra,Hamza, Ismail Sabeur,Zouari, Amel Bellaaj,et al. Atmospheric bulk deposition of dissolved nitrogen, phosphorus and silicate in the Gulf of Gabes (South Ionian Basin); implications for marine heterotrophic prokaryotes and ultraphytoplankton[J],2018,159:1-11.
APA Khammeri, Yosra.,Hamza, Ismail Sabeur.,Zouari, Amel Bellaaj.,Hamza, Asma.,Sahli, Emna.,...&Hassen, Malika Bel.(2018).Atmospheric bulk deposition of dissolved nitrogen, phosphorus and silicate in the Gulf of Gabes (South Ionian Basin); implications for marine heterotrophic prokaryotes and ultraphytoplankton.CONTINENTAL SHELF RESEARCH,159,1-11.
MLA Khammeri, Yosra,et al."Atmospheric bulk deposition of dissolved nitrogen, phosphorus and silicate in the Gulf of Gabes (South Ionian Basin); implications for marine heterotrophic prokaryotes and ultraphytoplankton".CONTINENTAL SHELF RESEARCH 159(2018):1-11.
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