气候变化领域集成服务门户(CCPortal): Large-Scale Landscape Drivers of CO 2 , CH 4 , DOC, and DIC in Boreal River Networks

CCPortal

DOI	10.1029/2018GB006106
	Large-Scale Landscape Drivers of CO 2 , CH 4 , DOC, and DIC in Boreal River Networks
	Hutchins R.H.S.; Prairie Y.T.; del Giorgio P.A.
发表日期	2019
ISSN	0886-6236
EISSN	1944-9224
起始页码	125
结束页码	142
卷号	33 期号:2
英文摘要	The boreal biome is characterized by extremely dense and complex fluvial networks that are closely coupled to land. Reconstructing the role that these fluvial networks play in regional carbon (C) budgets requires identifying landscape and environmental drivers of riverine C that operate at the whole network scale and that can be applied across landscapes. Here we explore drivers of CO 2 , CH 4 , and dissolved organic (DOC) and inorganic C (DIC) across 190 streams and rivers spanning 8 Strahler orders over an area of 500,000 km 2 of heterogeneous boreal landscape in Québec, focusing on those drivers that can be readily obtained from remote sensing data. Each C species (except DIC) could be modeled as a function of a proximal network-scale property, such as flow distance or elevation, but adding regional structure to these models greatly improved predictions. These modeled regional effects were similar for DOC, CO 2 , and CH 4 and were strongly related to average regional soil organic content and especially to NPP, the latter integrating regional differences in climate and other environmental factors. These results suggest that there may be regional C baselines determined by a combination of landscape and climate features, which simultaneously influence the average CO 2 , DOC, and CH 4 within fluvial networks, albeit through different underlying mechanisms and with varying degrees of influence on each C species. The latter two C species appear to be more sensitive to regional differences in soil, NPP, and climate than CO 2 or DIC, and therefore more likely to shift under future scenarios of change in northern landscapes. ©2019. American Geophysical Union. All Rights Reserved.
英文关键词	carbon dioxide (CO 2 ); dissolved organic carbon (DOC); fluvial networks; landscape drivers; methane (CH 4 ); streams and rivers
语种	英语
scopus关键词	Boreal Kingdom; carbon dioxide; dissolved inorganic carbon; dissolved organic carbon; environmental factor; landscape; methane; remote sensing; river; soil organic matter; stream; Canada; Quebec [Canada]
来源期刊	Global Biogeochemical Cycles
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129749
作者单位	Groupe de Recherche Interuniversitaire en Limnologie, (GRIL), Département des Sciences Biologiques, Université du Québec à Montréal, Montréal, Québec, Canada; Now at Department of Biological Sciences, University of Alberta, Edmonton, AlbertaCanada, Afghanistan
推荐引用方式 GB/T 7714	Hutchins R.H.S.,Prairie Y.T.,del Giorgio P.A.. Large-Scale Landscape Drivers of CO 2 , CH 4 , DOC, and DIC in Boreal River Networks[J],2019,33(2).
APA	Hutchins R.H.S.,Prairie Y.T.,&del Giorgio P.A..(2019).Large-Scale Landscape Drivers of CO 2 , CH 4 , DOC, and DIC in Boreal River Networks.Global Biogeochemical Cycles,33(2).
MLA	Hutchins R.H.S.,et al."Large-Scale Landscape Drivers of CO 2 , CH 4 , DOC, and DIC in Boreal River Networks".Global Biogeochemical Cycles 33.2(2019).