Effect of a nitrogen pulse on ecosystem N processing at different temperatures: A mesocosm experiment with (NO3-)-N-15 addition
文献类型：期刊论文
| 作者 | Olsen, Saara7,8; Cao, Yu4; Florencia Gutierrez, Maria3; Risgaard-Petersen, Nils1,2; Brucet, Sandra5,6,8; Landkildehus, Frank8; Lauridsen, Torben L.7,8; Davidson, Thomas A.8; Sondergaard, Martin7,8; Jeppesen, Erik7,8 |
| 刊名 | FRESHWATER BIOLOGY
 |
| 出版日期 | 2017-07-01 |
| 卷号 | 62期号:7页码:1232-1243 |
| 关键词 | N-15 addition mesocosm nitrogen pulses primary production temperature |
| ISSN号 | 0046-5070 |
| DOI | 10.1111/fwb.12940 |
| 英文摘要 | Shallow lakes may play an important role for the nitrogen (N) balance in drainage basins by processing, transferring and retaining N inputs. An increase in the frequency of storm-induced short-term N pulses and increased water temperatures are both likely outcomes of climate change, potentially affecting the N processing in lakes. An experiment with a (KNO3-)-N-15 pulse addition (increase in NO3- concentration from c.0.1 to 2mg/L) was carried out in 12 mesocosms with relatively low (applies to Danish lakes) total N (TN) and total phosphorus (TP) concentrations (c.0.3mgNL(-1) and 0.04mgPL(-1)) to assess the effects of an N pulse on N processing and storage in shallow lake ecosystems. The mesocosms have a hydraulic retention time of approximately two and a half months, and at the time of the experiment, they had been adapted to contrasting temperatures for a period of 10years: ambient, T3 (heating according to the Intergovernmental Panelon Climate Change 2007 A2 scenario, +3.7-4.5 degrees C, depending on season) and T5 (heating with A2+50%, +4.9-6.6 degrees C). Macrophytes and filamentous algae retained up to 40% and 30% of the added N-15, respectively, reflecting their high biomass in the mesocosms. Macrophytes and filamentous algae constituted between 70% and 80% of the biomass of all primary producers during the experiment in the T3 and ambient treatments and between 20% and 40% in T5. By comparison, less than 1% of the added N-15 diffused to the sediment and less than 5% was lost to the atmosphere as N-2 gas. Snails represented the long-term storage of N-15, retaining up to 6% of the tracer and with detectable enrichment 100days after tracer addition. We found no significant differences among the temperature treatments in the N-15 turnover after pulse dosing. However, a larger percentage of N-15 was stored in macrophytes in the ambient and T3 mesocosms, reflecting higher biomasses than in T5 where filamentous algae were more abundant. Macrophytes and filamentous algae rather than temperature were therefore key controllers of N processing during the summer N pulse in these shallow, relatively low TP lakes. |
| 资助项目 | SDC (Sino-Danish Centre for Education and Research) ; Aarhus University ; NSF-China[30570291] ; NSF-China[31500296] ; CLEAR ; MARS ; 7th EU Framework[603378] ; PROGNOS ; CSC (The China Scholarship Council) ; Marie Curie Intra European Fellowship[330249] ; Danish National Research Foundation[DNRF104] |
| WOS研究方向 | Marine & Freshwater Biology |
| 语种 | 英语 |
| WOS记录号 | WOS:000403021500010 |
| 出版者 | WILEY |
| 源URL | [http://202.127.146.157/handle/2RYDP1HH/1350]  |
| 专题 | 中国科学院武汉植物园 |
| 通讯作者 | Olsen, Saara; Cao, Yu |
| 作者单位 | 1.Aarhus Univ, Dept Biosci, Microbiol Sect, Aarhus, Denmark 2.Aarhus Univ, Dept Biosci, Ctr Geomicrobiol, Aarhus, Denmark 3.Inst Nacl Limnol CONICET UNL, Ciudad Univ, Santa Fe, Argentina 4.Chinese Acad Sci, Wuhan Bot Garden, Key Lab Aquat Bot & Watershed Ecol, Wuhan, Hubei, Peoples R China 5.Cent Univ Catalonia, Aquat Ecol Grp, Univ Vic, Catalonia, Spain 6.ICREA, Catalan Inst Res & Adv Studies, Barcelona, Spain 7.Sino Danish Ctr Educ & Res SDC, Beijing, Peoples R China 8.Aarhus Univ, Dept Biosci, Silkeborg, Denmark |
| 推荐引用方式 GB/T 7714 | Olsen, Saara,Cao, Yu,Florencia Gutierrez, Maria,et al. Effect of a nitrogen pulse on ecosystem N processing at different temperatures: A mesocosm experiment with (NO3-)-N-15 addition[J]. FRESHWATER BIOLOGY,2017,62(7):1232-1243. |
| APA | Olsen, Saara.,Cao, Yu.,Florencia Gutierrez, Maria.,Risgaard-Petersen, Nils.,Brucet, Sandra.,...&Jeppesen, Erik.(2017).Effect of a nitrogen pulse on ecosystem N processing at different temperatures: A mesocosm experiment with (NO3-)-N-15 addition.FRESHWATER BIOLOGY,62(7),1232-1243. |
| MLA | Olsen, Saara,et al."Effect of a nitrogen pulse on ecosystem N processing at different temperatures: A mesocosm experiment with (NO3-)-N-15 addition".FRESHWATER BIOLOGY 62.7(2017):1232-1243. |
入库方式： OAI收割
来源：武汉植物园
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