干旱区生态环境知识资源中心(Arid): Hydrologic connectivity determines dissolved organic matter biogeochemistry in northern high-latitude lakes

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DOI	10.1002/lno.11417
	Hydrologic connectivity determines dissolved organic matter biogeochemistry in northern high-latitude lakes
	Johnston, Sarah Ellen; Striegl, Robert G.; Bogard, Matthew J.; Dornblaser, Mark M.; Butman, David E.; Kellerman, Anne M.; Wickland, Kimberly P.; Podgorski, David C.; Spencer, Robert G. M.
通讯作者	Johnston, SE
来源期刊	LIMNOLOGY AND OCEANOGRAPHY
ISSN	0024-3590
EISSN	1939-5590
出版年	2020
卷号	65 期号:8 页码:1764-1780
英文摘要	Northern high-latitude lakes are undergoing climate-induced changes including shifts in their hydrologic connectivity with terrestrial ecosystems. How this will impact dissolved organic matter (DOM) biogeochemistry remains uncertain. We examined the drivers of DOM composition for lakes in the Yukon Flats Basin in Alaska, an arid region of low relief that is characteristic of over one-quarter of circumpolar lake area. Utilizing the vascular plant biomarker lignin, chromophoric dissolved organic matter (CDOM), and ultrahigh-resolution mass spectrometry, we interpreted DOM compositional changes using lake-water stable isotope (delta O-18-H2O) composition as a proxy for lake hydrologic connectivity with the landscape. We observed a relative decrease in CDOM in more hydrologically isolated lakes (enriched delta O-18-H2O) without a corresponding decrease in dissolved organic carbon (DOC) concentration. Although DOC and CDOM were weakly correlated, a significant positive relationship between lignin and CDOM (r(2)= 0.67) demonstrates that optical parameters are useful for estimating lignin concentration and thus vascular plant contribution to lake DOM. Indicators of allochthonous DOM, including lignin carbon normalized yields, CDOM aromaticity proxies, and relative abundances of polyphenolic and condensed aromatic compound classes, were negatively correlated with delta O-18-H2O (r(2) > 0.45), suggesting there is little allochthonous DOM supplied to many of these hydrologically isolated lakes. We conclude that decreased lake hydrologic connectivity, driven by ongoing climate change (i.e., decreased precipitation, warming temperatures), will reduce allochthonous DOM contributions and shift lakes toward lower CDOM systems with ecosystem-scale ramifications for heat transfer, photochemical reactions, productivity, and ultimately their biogeochemical function.
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000559364000007
WOS关键词	TERRESTRIAL CARBON ; OPTICAL-PROPERTIES ; AQUATIC CONTINUUM ; MASS-SPECTROMETER ; FINNISH LAKES ; YUKON RIVER ; CLIMATE ; DOC ; CDOM ; REACTIVITY
WOS类目	Limnology ; Oceanography
WOS研究方向	Marine & Freshwater Biology ; Oceanography
来源机构	United States Geological Survey
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325609
作者单位	[Johnston, Sarah Ellen; Kellerman, Anne M.; Podgorski, David C.; Spencer, Robert G. M.] Florida State Univ, Natl High Magnet Field Lab Geochem Grp, Tallahassee, FL 32306 USA; [Johnston, Sarah Ellen; Kellerman, Anne M.; Podgorski, David C.; Spencer, Robert G. M.] Florida State Univ, Dept Earth Ocean & Atmospher Sci, Tallahassee, FL 32306 USA; [Striegl, Robert G.; Dornblaser, Mark M.; Wickland, Kimberly P.] US Geol Survey, Boulder, CO USA; [Bogard, Matthew J.; Butman, David E.] Univ Washington, Sch Environm & Forest Sci, Seattle, WA 98195 USA; [Butman, David E.] Univ Washington, Dept Civil & Environm Engn, Seattle, WA 98195 USA; [Johnston, Sarah Ellen; Bogard, Matthew J.] Univ Lethbridge, Dept Biol Sci, Lethbridge, AB, Canada; [Podgorski, David C.] Univ New Orleans, Dept Chem, Pontchartrain Inst Environm Sci, New Orleans, LA 70148 USA
推荐引用方式 GB/T 7714	Johnston, Sarah Ellen,Striegl, Robert G.,Bogard, Matthew J.,et al. Hydrologic connectivity determines dissolved organic matter biogeochemistry in northern high-latitude lakes[J]. United States Geological Survey,2020,65(8):1764-1780.
APA	Johnston, Sarah Ellen.,Striegl, Robert G..,Bogard, Matthew J..,Dornblaser, Mark M..,Butman, David E..,...&Spencer, Robert G. M..(2020).Hydrologic connectivity determines dissolved organic matter biogeochemistry in northern high-latitude lakes.LIMNOLOGY AND OCEANOGRAPHY,65(8),1764-1780.
MLA	Johnston, Sarah Ellen,et al."Hydrologic connectivity determines dissolved organic matter biogeochemistry in northern high-latitude lakes".LIMNOLOGY AND OCEANOGRAPHY 65.8(2020):1764-1780.