Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019WR025025 |
Coupling Concentration- and Process-Discharge Relationships Integrates Water Chemistry and Metabolism in Streams | |
O&; 39;Donnell, B. | |
2019-12-06 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
卷号 | 55期号:12页码:10179-10190 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Stream ecosystem processes, such as metabolism, are dynamically impacted by flow intensity. Therefore, without integrating ecosystem processes with water quality, we miss opportunities to develop frameworks to understand metabolic responses to changing flow. Flow simultaneously affects the material transport and biological opportunities for material transformation. Combining the strengths of ecohydrology and stream ecology to understand how flow variation alters ecosystem processes, we analyzed more than 5 years of water quality and stream metabolism data. We created segmented process-discharge (P-Q) relationships to examine how metabolism rates vary across discharge and compared them to concentration-discharge (C-Q) relationships to explore the dynamic effects of discharge on processes and physicochemical parameters. Within the segmented P-Q relationships, we found the behavior of ecosystem respiration (ER), gross primary production (GPP), and net ecosystem production (NEP) to be different at high and low flows with varying degrees of statistical significance, demonstrating the potential for divergent metabolic responses across changing flows. GPP declined with increasing discharge. The rate of ER declined with discharge initially but then became unchanging at higher flows. NEP reflected the divergent trends between ER and GPP, as the relationship of NEP to Q was flat at lower discharge and declined at higher flows. Interrelated physicochemical parameters and ecosystem processes, such as pH and NEP, had mirrored responses to discharge. Coupling analyses of flow, water quality, and metabolism offers a more complete picture of interrelated ecosystem processes, allowing for a better understanding of ecosystem response to the physical and chemical changes that occur across flows. |
英文关键词 | concentration-discharge metabolism catchment C-Q |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000500768600001 |
WOS关键词 | DISSOLVED ORGANIC-CARBON ; ECOSYSTEM METABOLISM ; NUTRIENT ; CATCHMENT ; PATTERNS ; SEDIMENT ; NITRATE ; EVENTS ; CYCLE |
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/223955 |
专题 | 资源环境科学 |
作者单位 | Virginia Polytech Inst & State Univ, Dept Biol Sci, Blacksburg, VA 24061 USA |
推荐引用方式 GB/T 7714 | O&,39;Donnell, B.. Coupling Concentration- and Process-Discharge Relationships Integrates Water Chemistry and Metabolism in Streams[J]. WATER RESOURCES RESEARCH,2019,55(12):10179-10190. |
APA | O&,&39;Donnell, B..(2019).Coupling Concentration- and Process-Discharge Relationships Integrates Water Chemistry and Metabolism in Streams.WATER RESOURCES RESEARCH,55(12),10179-10190. |
MLA | O&,et al."Coupling Concentration- and Process-Discharge Relationships Integrates Water Chemistry and Metabolism in Streams".WATER RESOURCES RESEARCH 55.12(2019):10179-10190. |
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