Stream Dissolved Organic Matter in Permafrost Regions Shows Surprising Compositional Similarities but Negative Priming and Nutrient Effects
文献类型：期刊论文
| 作者 | Wologo, Ethan; Shakil, Sarah; Zolkos, Scott; Textor, Sadie; Ewing, Stephanie; Klassen, Jane; Spencer, Robert G. M.; Podgorski, David C.; Tank, Suzanne E.; Baker, Michelle A. |
| 刊名 | GLOBAL BIOGEOCHEMICAL CYCLES
 |
| 出版日期 | 2021 |
| 卷号 | 35期号:1 |
| ISSN号 | 0886-6236 |
| 关键词 | permafrost cryosphere and high-latitude processes thermokarst rivers carbon cycling nutrients and nutrient cycling |
| DOI | 10.1029/2020GB006719 |
| 文献子类 | Article |
| 英文摘要 | Permafrost degradation is delivering bioavailable dissolved organic matter (DOM) and inorganic nutrients to surface water networks. While these permafrost subsidies represent a small portion of total fluvial DOM and nutrient fluxes, they could influence food webs and net ecosystem carbon balance via priming or nutrient effects that destabilize background DOM. We investigated how addition of biolabile carbon (acetate) and inorganic nutrients (nitrogen and phosphorus) affected DOM decomposition with 28-day incubations. We incubated late-summer stream water from 23 locations nested in seven northern or high-altitude regions in Asia, Europe, and North America. DOM loss ranged from 3% to 52%, showing a variety of longitudinal patterns within stream networks. DOM optical properties varied widely, but DOM showed compositional similarity based on Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) analysis. Addition of acetate and nutrients decreased bulk DOM mineralization (i.e., negative priming), with more negative effects on biodegradable DOM but neutral or positive effects on stable DOM. Unexpectedly, acetate and nutrients triggered breakdown of colored DOM (CDOM), with median decreases of 1.6% in the control and 22% in the amended treatment. Additionally, the uptake of added acetate was strongly limited by nutrient availability across sites. These findings suggest that biolabile DOM and nutrients released from degrading permafrost may decrease background DOM mineralization but alter stoichiometry and light conditions in receiving waterbodies. We conclude that priming and nutrient effects are coupled in northern aquatic ecosystems and that quantifying two-way interactions between DOM properties and environmental conditions could resolve conflicting observations about the drivers of DOM in permafrost zone waterways. |
| 学科主题 | Environmental Sciences ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences |
| 电子版国际标准刊号 | 1944-9224 |
| 出版地 | WASHINGTON |
| WOS关键词 | BOREAL CATCHMENT UNDERLAIN ; CARBON BIODEGRADABILITY ; PEEL PLATEAU ; NITROGEN AVAILABILITY ; LITTER DECOMPOSITION ; MASS-SPECTROMETER ; WATER CHEMISTRY ; SOIL CARBON ; THAW ; RIVER |
| WOS研究方向 | Science Citation Index Expanded (SCI-EXPANDED) |
| 语种 | 英语 |
| 出版者 | AMER GEOPHYSICAL UNION |
| WOS记录号 | WOS:000613330700002 |
| 资助机构 | Montana Agricultural Experimental Station (MAES project) [MONB00389] ; National Park Service via the Northwest Alaska ; National Park Service via Rocky Mountain Cooperative Ecosystem Study Units (CESUs) ; MSU Bayard Taylor Fellowship ; U.S. National Science Foundation (NSF) [1446328, 1846855, 1637459, 1916567, 1916565] ; program of the Netherlands Earth System Science Centre (NESSC) - Ministry of Education, Culture and Science (OCW) [024.002.001] ; Natural Sciences and Engineering Research Council of Canada (NSERC) ; Polar Continental Shelf Program ; University of Alberta Northern Research Awards Program ; Northern Scientific Training Program ; NSF [1208732, 1754216, 1464392] ; NASA-ABoVE Project [14-14TE-0012 (NNX15AU07A)] ; USGS Biological Carbon Sequestration Program ; National Park Service Inventory and Monitoring program ; USGS Changing Arctic Ecosystems program ; National Science Foundation Division of Chemistry [DMR-1644779] ; State of Florida ; Institutional Development Awards (IDeA) from the National Institute of General Medical Sciences of the National Institutes of Health [P20GM103474, U54GM115371, 5P20GM104417] |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/26725]  |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Textor, Sadie; Spencer, Robert G. M.; Podgorski, David C.] Florida State Univ, Dept Earth Ocean & Atmospher Sci, Tallahassee, FL 32306 USA 2.Frei, Rebecca J.] Univ Alberta, Dept Renewable Resources, Edmonton, AB, Canada 3.Howe, Jansen; Frei, Rebecca J.; Bratsman, Samuel P.; Abbott, Benjamin W.] Brigham Young Univ, Dept Plant & Wildlife Sci, Provo, UT 84602 USA 4.CNRS, Environm Ville Soc, UMR5600, Lyon, France 5.Dean, Joshua F.] Univ Liverpool, Sch Environm Sci, Liverpool, Merseyside, England 6.Dean, Joshua F.; Vonk, Jorien E.] Vrije Univ Amsterdam, Dept Earth Sci, Amsterdam, Netherlands 7.Finnish Environm Inst SYKE, Joensuu, Finland 8.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China 9.Michigan State Univ, Dept Earth & Environm Sci, E Lansing, MI 48824 USA 10.Wickland, Kimberly P.; Foks, Sydney S. W.] USGS, Water Resources Mission Area, Boulder, CO USA |
| 推荐引用方式 GB/T 7714 | Wologo, Ethan,Shakil, Sarah,Zolkos, Scott,et al. Stream Dissolved Organic Matter in Permafrost Regions Shows Surprising Compositional Similarities but Negative Priming and Nutrient Effects[J]. GLOBAL BIOGEOCHEMICAL CYCLES,2021,35(1). |
| APA | Wologo, Ethan.,Shakil, Sarah.,Zolkos, Scott.,Textor, Sadie.,Ewing, Stephanie.,...&Abbott, Benjamin W..(2021).Stream Dissolved Organic Matter in Permafrost Regions Shows Surprising Compositional Similarities but Negative Priming and Nutrient Effects.GLOBAL BIOGEOCHEMICAL CYCLES,35(1). |
| MLA | Wologo, Ethan,et al."Stream Dissolved Organic Matter in Permafrost Regions Shows Surprising Compositional Similarities but Negative Priming and Nutrient Effects".GLOBAL BIOGEOCHEMICAL CYCLES 35.1(2021). |
入库方式： OAI收割
来源：植物研究所
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