干旱区生态环境知识资源中心(Arid): Riparian vegetation as an indicator of stream channel presence and connectivity in arid environments

Arid

DOI	10.1016/j.jaridenv.2020.104167
	Riparian vegetation as an indicator of stream channel presence and connectivity in arid environments
	Manning, Aspen; Julian, Jason P.; Doyle, Martin W.
通讯作者	Manning, A
来源期刊	JOURNAL OF ARID ENVIRONMENTS
ISSN	0140-1963
EISSN	1095-922X
出版年	2020
卷号	178
英文摘要	Stream channels in the American Southwest are misunderstood because they have been understudied and overgeneralized. This misunderstanding has serious consequences for environmental policy, particularly in defining the scope of jurisdiction under the Clean Water Act. While the current status of regulations defining the scope of jurisdictional waters is in flux, the currently-codified regulations require that jurisdictional tributaries must have a physical, chemical, or biological connection to downstream traditional navigable waters. The lack of consistent flow in arid stream channels causes misinterpretations of physio-chemical indicators that are commonly used in perennial streams of humid environments. Here we overview the use of riparian vegetation as a biological indicator of stream channel presence and connectivity in arid environments. Based on a thorough literature review and synthesis of arid region studies, we found key spatiotemporal patterns of arid riparian vegetation that could potentially be used to determine hydrologic connectivity. Much of the vegetation along arid stream channels is well-adapted to water scarcity and varies in response to differences in geomorphology, hydrology, and land use across multiple scales. Riparian vegetation in arid environments ranges from hydroriparian to xeroriparian and can include, or be made up exclusively, of upland species. Regardless of species type, plants near stream channels tend to be denser and larger than upland plants. Access to reliable water results in denser, larger plants and more water-dependent species. To demonstrate the potential of riparian vegetation as an indicator of connectivity, we conclude with a case study of Little Sycamore Wash in northern Arizona. We used the Normalized Difference Vegetation Index to (1) distinguish between riparian and upland vegetation, and (2) assess connectivity of patches of riparian vegetation. By understanding the spatiotemporal variability of riparian vegetation along arid stream channels, we can make better decisions on their regulation and management.
英文关键词	Arid environments Waters of the United States Connectivity Riparian vegetation
类型	Review
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000533505200013
WOS关键词	PLANT WATER RELATIONS ; UNITED-STATES ; MOJAVE DESERT ; POPULATION-DYNAMICS ; LARREA-TRIDENTATA ; AMBROSIA-DUMOSA ; SONORAN DESERT ; CLIMATE-CHANGE ; GAS-EXCHANGE ; FLOOD FLOWS
WOS类目	Ecology ; Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324481
作者单位	[Manning, Aspen; Julian, Jason P.] Texas State Univ, Dept Geog, 601 Univ Dr, San Marcos, TX 78666 USA; [Doyle, Martin W.] Duke Univ, Nicholas Sch Environm, 9 Circuit Dr, Durham, NC 27710 USA
推荐引用方式 GB/T 7714	Manning, Aspen,Julian, Jason P.,Doyle, Martin W.. Riparian vegetation as an indicator of stream channel presence and connectivity in arid environments[J],2020,178.
APA	Manning, Aspen,Julian, Jason P.,&Doyle, Martin W..(2020).Riparian vegetation as an indicator of stream channel presence and connectivity in arid environments.JOURNAL OF ARID ENVIRONMENTS,178.
MLA	Manning, Aspen,et al."Riparian vegetation as an indicator of stream channel presence and connectivity in arid environments".JOURNAL OF ARID ENVIRONMENTS 178(2020).