Arid
DOI10.3389/fmars.2016.00226
The Potential Impact of Saharan Dust and Polluted Aerosols on Microbial Populations in the East Mediterranean Sea, an Overview of a Mesocosm Experimental Approach
Herut, Barak1; Rahav, Eyal1,2; Tsagaraki, Tatiana M.3,4; Giannakourou, Antonia5; Tsiola, Anastasia3; Psarra, Stella3; Lagaria, Anna5; Papageorgiou, Nafsika3; Mihalopoulos, Nikos6; Theodosi, Christina N.6; Violaki, Kalliopi6; Stathopoulou, Eleni7; Scoullos, Michael7; Krom, Michael D.8,9; Stockdale, Anthony8; Shi, Zongbo10; Berman-Frank, Ilana2; Meador, Travis B.11; Tanaka, Tsuneo12; Paraskevi, Pitta3
通讯作者Herut, Barak ; Rahav, Eyal
来源期刊FRONTIERS IN MARINE SCIENCE
EISSN2296-7745
出版年2016
卷号3
英文摘要

Recent estimates of nutrient budgets for the Eastern Mediterranean Sea (EMS) indicate that atmospheric aerosols play a significant role as suppliers of macro- and micro- nutrients to its Low Nutrient Low Chlorophyll water. Here we present the first mesocosm experimental study that examines the overall response of the oligotrophic EMS surface mixed layer (Cretan Sea, May 2012) to two different types of natural aerosol additions, "pure" Saharan dust (SD, 1.6 mg l(-1)) and mixed aerosols (A-polluted and desert origin, 1 mg l(-1)). We describe the rationale, the experimental set-up, the chemical characteristics of the ambient water and aerosols and the relative maximal biological impacts that resulted from the added aerosols. The two treatments, run in triplicates (3 m(3) each), were compared to control-unamended runs. Leaching of similar to 2.1-2.8 and 2.2-3.7 nmol PO4 and 20-26 and 53-55 nmol NOx was measured per each milligram of SD and A, respectively, representing an addition of similar to 30% of the ambient phosphate concentrations. The nitrate/phosphate ratios added in the A treatment were twice than those added in the SD treatment. Both types of dry aerosols triggered a positive change (25-600% normalized per 1 mg l(-1) addition) in most of the rate and state variables that were measured: bacterial abundance (BA), bacterial production (BP), Synechococcus (Syn) abundance, chlorophyll-a (chl-a), primary production (PP), and dinitrogen fixation (N-2-fix), with relative changes among them following the sequence BP> Pip approximate to N2-fix>chl-aP approximate to Bk approximate to Syn. Our results show that the "polluted" aerosols triggered a relatively larger biological change compared to the SD amendments (per a similar amount of mass addition), especially regarding BP and PP. We speculate that despite the co-limitation of P and N in the EMS, the additional N released by the A treatment may have triggered the relatively larger response in most of the rate and state variables as compared to SD. An implication of our study is that a warmer atmosphere in the future may increase dust emissions and influence the intensity and length of the already well stratified water column in the EMS and hence the impact of the aerosols as a significant external source of new nutrients.


英文关键词mesocosm experiments dust aerosols nutrients trace metals Eastern Mediterranean Sea
类型Article
语种英语
国家Israel ; Greece ; Norway ; England ; Germany ; France
收录类别SCI-E
WOS记录号WOS:000457358000222
WOS关键词SURFACE WATERS ; OLIGOTROPHIC WATERS ; COMMUNITY STRUCTURE ; ATMOSPHERIC INPUT ; LEVANTINE BASIN ; METABOLIC STATE ; CHLOROPHYLL-A ; SOUTH-PACIFIC ; N-2 FIXATION ; MINERAL DUST
WOS类目Environmental Sciences ; Marine & Freshwater Biology
WOS研究方向Environmental Sciences & Ecology ; Marine & Freshwater Biology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/193045
作者单位1.Natl Inst Oceanog, Israel Oceanog & Limnol Res, Haifa, Israel;
2.Bar Ilan Univ, Mina & Everard Goodman Fac Life Sci, Ramat Gan, Israel;
3.Hellen Ctr Marine Res, Inst Oceanog, Iraklion, Crete, Greece;
4.Univ Bergen, Dept Biol, Bergen, Norway;
5.Hellen Ctr Marine Res, Inst Oceanog, Athens, Greece;
6.Univ Crete, Dept Chem, Iraklion, Crete, Greece;
7.Univ Athens, Lab Environm Chem, Dept Chem, Athens, Greece;
8.Univ Leeds, Sch Earth & Environm, Leeds, W Yorkshire, England;
9.Univ Haifa, Dept Marine Biol, Charney Sch Marine Sci, Haifa, Israel;
10.Univ Birmingham, Dept Geog Earth & Environm Sci, Birmingham, W Midlands, England;
11.MARUM Ctr Marine Environm Sci, Bremen, Germany;
12.Univ Mediterranee, Lab Oceanog Phys & Biogeochim, Marseille, France
推荐引用方式
GB/T 7714
Herut, Barak,Rahav, Eyal,Tsagaraki, Tatiana M.,et al. The Potential Impact of Saharan Dust and Polluted Aerosols on Microbial Populations in the East Mediterranean Sea, an Overview of a Mesocosm Experimental Approach[J],2016,3.
APA Herut, Barak.,Rahav, Eyal.,Tsagaraki, Tatiana M..,Giannakourou, Antonia.,Tsiola, Anastasia.,...&Paraskevi, Pitta.(2016).The Potential Impact of Saharan Dust and Polluted Aerosols on Microbial Populations in the East Mediterranean Sea, an Overview of a Mesocosm Experimental Approach.FRONTIERS IN MARINE SCIENCE,3.
MLA Herut, Barak,et al."The Potential Impact of Saharan Dust and Polluted Aerosols on Microbial Populations in the East Mediterranean Sea, an Overview of a Mesocosm Experimental Approach".FRONTIERS IN MARINE SCIENCE 3(2016).
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