Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.3389/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
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EISSN | 2296-7745 |
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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