干旱区生态环境知识资源中心(Arid): Carbon and Nitrogen Export from Semiarid Uplands to Perennial Rivers: Connections and Missing Links, San Pedro River, Arizona, USA

Arid

DOI	10.1111/j.1749-8198.2012.00510.x
	Carbon and Nitrogen Export from Semiarid Uplands to Perennial Rivers: Connections and Missing Links, San Pedro River, Arizona, USA
	Meixner, Thomas; Brooks, Paul; Hogan, James; Soto, Carlos; Simpson, Scott
通讯作者	Meixner, T
来源期刊	GEOGRAPHY COMPASS
ISSN	1749-8198
出版年	2012
卷号	6 期号:9 页码:546-559
英文摘要	Investigations of biogeochemical processes in semiarid environments have largely focused on either plot studies in the uplands or on in-stream and near stream reaction or transport studies. Recent research permits us to synthesize a conceptual model of how uplands and riparian systems are linked in semiarid climates specific to the San Pedro River basin in Arizona. These studies have demonstrated significant export of both dissolved and sediment associated carbon and nitrogen from the uplands into the channel network of semiarid river systems. Likewise research has demonstrated that riparian areas are biogeochemically active, with the potential to rapidly respire inputs of organic matter, releasing carbon back to the atmosphere and inorganic nitrogen into the water column or back to the atmosphere through denitrification. For the San Pedro, a total of more than 80% of both carbon and nitrogen export from the uplands that is observed in small catchments is not observed at the larger river system scale, indicating that this carbon and nitrogen must be either stored, taken up by vegetation or returned to the atmosphere at scales between the small catchment (1-1000 ha) and large river systems scale (similar to 320,000 ha). In summary, existing research shows that the uplands contribute significant amounts of material into the stream and near stream zone, and that this imported material influences nutrient conditions in aquatic systems. These conclusions point out significant gaps in developing a complete understanding of the reactions of carbon and nitrogen as material is transported from the uplands through ephemeral and perennial channel networks.
类型	Article
语种	英语
收录类别	ESCI
WOS记录号	WOS:000214337900003
WOS关键词	SOUTHERN NEW-MEXICO ; DESERT STREAM ; SPATIAL HETEROGENEITY ; RIPARIAN VEGETATION ; SHRUBLAND HABITATS ; NUTRIENT LOSSES ; WATER ; SUCCESSION ; VARIABILITY ; GRASSLAND
WOS类目	Geography
WOS研究方向	Geography
来源机构	University of Arizona
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/329954
作者单位	[Meixner, Thomas; Brooks, Paul; Hogan, James; Soto, Carlos; Simpson, Scott] Univ Arizona, SAHRA, Dept Hydrol & Water Resources, Tucson, AZ 85721 USA; [Hogan, James] New Mexico Environm Dept, Mexico City, DF, Mexico
推荐引用方式 GB/T 7714	Meixner, Thomas,Brooks, Paul,Hogan, James,et al. Carbon and Nitrogen Export from Semiarid Uplands to Perennial Rivers: Connections and Missing Links, San Pedro River, Arizona, USA[J]. University of Arizona,2012,6(9):546-559.
APA	Meixner, Thomas,Brooks, Paul,Hogan, James,Soto, Carlos,&Simpson, Scott.(2012).Carbon and Nitrogen Export from Semiarid Uplands to Perennial Rivers: Connections and Missing Links, San Pedro River, Arizona, USA.GEOGRAPHY COMPASS,6(9),546-559.
MLA	Meixner, Thomas,et al."Carbon and Nitrogen Export from Semiarid Uplands to Perennial Rivers: Connections and Missing Links, San Pedro River, Arizona, USA".GEOGRAPHY COMPASS 6.9(2012):546-559.