Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017WR022168 |
Using In-Situ Optical Sensors to Understand the Biogeochemistry of Dissolved Organic Matter Across a Stream Network | |
Wymore, Adam S.; Potter, Jody; Rodriguez-Cardona, Bianca; McDowell, William H. | |
2018-04-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:4页码:2949-2958 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The advent of high-frequency in situ optical sensors provides new opportunities to study the biogeochemistry of dissolved organic matter (DOM) in aquatic ecosystems. We used fDOM (fluorescent dissolved organic matter) to examine the spatial and temporal variability in dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) across a heterogeneous stream network that varies in NO3- concentration. Across the ten study streams fDOM explained twice the variability in the concentration of DOC (r(2) = 0.82) compared to DON (r(2) = 0.39), which suggests that the N-rich fraction of DOM is either more variable in its sources or more bioreactive than the more stable C-rich fraction. Among sites, DON molar fluorescence was approximately 3x more variable than DOC molar fluorescence and was correlated with changes in inorganic N, indicating that DON is both more variable in composition as well as highly responsive to changes in inorganic N. Laboratory results also indicate that the fDOM sensors we used perform as well as the excitation-emission wavelength pair generally referred to as the "tryptophan-like'' peak when measured under laboratory conditions. However, since neither the field sensor not the laboratory measurements explained a large percentage of variation in DON concentrations, challenges still remain for monitoring the ambient pool of dissolved organic nitrogen. Sensor networks provide new insights into the potential reactivity of DOM and the variability in DOC and DON biogeochemistry across sites. These insights are needed to build spatially explicit models describing organic matter dynamics and water quality. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000434186400025 |
WOS关键词 | CHEMICAL FRACTIONATION ; FLUORESCENCE ; NITROGEN ; NITRATE ; RATIOS ; CARBON ; SEA ; BOD ; STOICHIOMETRY ; ECOSYSTEMS |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/21170 |
专题 | 资源环境科学 |
作者单位 | Univ New Hampshire, Deparment Nat Resources & Environm, Durham, NH 03824 USA |
推荐引用方式 GB/T 7714 | Wymore, Adam S.,Potter, Jody,Rodriguez-Cardona, Bianca,et al. Using In-Situ Optical Sensors to Understand the Biogeochemistry of Dissolved Organic Matter Across a Stream Network[J]. WATER RESOURCES RESEARCH,2018,54(4):2949-2958. |
APA | Wymore, Adam S.,Potter, Jody,Rodriguez-Cardona, Bianca,&McDowell, William H..(2018).Using In-Situ Optical Sensors to Understand the Biogeochemistry of Dissolved Organic Matter Across a Stream Network.WATER RESOURCES RESEARCH,54(4),2949-2958. |
MLA | Wymore, Adam S.,et al."Using In-Situ Optical Sensors to Understand the Biogeochemistry of Dissolved Organic Matter Across a Stream Network".WATER RESOURCES RESEARCH 54.4(2018):2949-2958. |
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