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DOI	10.1007/s10533-020-00664-9
	Measuring the influence of environmental conditions on dissolved organic matter biodegradability and optical properties: a combined field and laboratory study
	Landsman-Gerjoi M.; Perdrial J.N.; Lancellotti B.; Seybold E.; Schroth A.W.; Adair C.; Wymore A.
发表日期	2020
ISSN	0168-2563
起始页码	37
结束页码	52
卷号	149 期号:1
英文摘要	Fluorescence spectroscopy is a common tool to assess optical dissolved organic matter (DOM) and a number of characteristics, including DOM biodegradability, have been inferred from these analyses. However, recent findings on soil and DOM dynamics emphasize the importance of ecosystem-scale factors, such as physical separation of substrate from soil microbial communities and soil physiochemical cycles driving DOM stability. We apply this principle to soil derived DOM and hypothesize that optical properties can only supply information on biodegradability when evaluated in the larger ecosystem because substrate composition and the activity/abundance of the microbial community ultimately drive DOM degradation. To evaluate biodegradability in this context, we assessed aqueous soil extracts for water extractable organic carbon (WEOC) content, biodegradability, microbial biomass and DOM characteristics using fluorescence spectroscopy across a range of environmental conditions (covariant with season and land use) in northern Vermont, USA. Our results indicate that changes in environmental conditions affect composition, quantity, and biodegradability of DOM. WEOC concentrations were highest in the fall and lowest in the summer, while no significant differences were found between land covers; however, DOM biodegradability was significantly higher in the agricultural site across seasons. Despite a shift in utilized substrate from less aromatic DOM in summer to more aromatic DOM in winter, biodegradability was similar for all seasons. The only exception was cold temperature incubations where microbial activity was depressed, and processing was slowed. These results provide examples on how fluorescence based metrics can be combined with context relevant environmental parameters to evaluate bioavailability in the context of the larger ecosystem. © 2020, Springer Nature Switzerland AG.
英文关键词	Biodegradability; Dissolved organic matter; Fluorescence spectroscopy; PARAFAC; Seasonal variability
语种	英语
scopus关键词	bioavailability; biodegradation; dissolved organic matter; environmental conditions; field method; laboratory method; land cover; microbial activity; microbial community; optical property; physicochemical property; soil microorganism; United States; Vermont
来源期刊	Biogeochemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153149
作者单位	Environmental Biogeochemistry Lab, Geology Department, University of Vermont, 180 Colchester Avenue, Burlington, VT 05405, United States; Vermont EPSCoR Basin Resilience to Extreme Events (BREE), Burlington, VT, United States; Global Biogeochemistry Lab, Rubenstein School, University of Vermont, Burlington, VT, United States; Geology Department, University of Vermont Burlington, Burlington, VT, United States; Department of Natural Resources and the Environment, University of New Hampshire, Durham, NH, United States; Kansas Geological Survey, University of Kansas, Lawrence, KS, United States
推荐引用方式 GB/T 7714	Landsman-Gerjoi M.,Perdrial J.N.,Lancellotti B.,et al. Measuring the influence of environmental conditions on dissolved organic matter biodegradability and optical properties: a combined field and laboratory study[J],2020,149(1).
APA	Landsman-Gerjoi M..,Perdrial J.N..,Lancellotti B..,Seybold E..,Schroth A.W..,...&Wymore A..(2020).Measuring the influence of environmental conditions on dissolved organic matter biodegradability and optical properties: a combined field and laboratory study.Biogeochemistry,149(1).
MLA	Landsman-Gerjoi M.,et al."Measuring the influence of environmental conditions on dissolved organic matter biodegradability and optical properties: a combined field and laboratory study".Biogeochemistry 149.1(2020).