干旱区生态环境知识资源中心(Arid): Flows for floodplain forests: Conversion from an intermittent to continuous flow regime enabled riparian woodland development along a prairie river

Arid

DOI	10.1002/rra.3724
	Flows for floodplain forests: Conversion from an intermittent to continuous flow regime enabled riparian woodland development along a prairie river
	Bigelow, Sarah G.; Hillman, Evan J.; Hills, Brian; Samuelson, Glenda M.; Rood, Stewart B.
通讯作者	Rood, SB
来源期刊	RIVER RESEARCH AND APPLICATIONS
ISSN	1535-1459
EISSN	1535-1467
出版年	2020
卷号	36 期号:10 页码:2051-2062
英文摘要	The Little Bow River (LBR) in western Canada naturally displayed an intermittent flow regime; the channel dried up most summers, excluding the development of riparian woodlands within this semi-arid ecoregion. Around 1900, the Little Bow Canal was excavated to divert water from the adjacent Highwood River and with flow augmentation the LBR flow became continuous through the growth season. We hypothesized that the continuous regime enabled riparian woodland establishment and assessed conditions with sequential aerial photographs and field observations. Supporting the hypothesis, a few woodland groves established near the Highwood River where balsam poplars (Populus balsamifera) provided an abundant seed source. To investigate the basis for woodland development, we analysed historical hydrology of the LBR and assessed the four larger woodland groves, which included mature poplars, trembling aspen (P.tremuloides) and willow shrubs (Salix bebbianaandS.exigua). Each location had some bank excavation with channelization or gravel mining, and tree ageing through ring counts indicated gradual colonization and pulses of establishment after floods in 1920 and 1942. Thus, the conversion from an intermittent to continuous flow regime enabled woodland development which also benefited from excavations that created barren colonization sites. The study revealed four requirements for riparian woodland colonization in a dry region: (a) seeds, (b) barren sites, (c) bank saturation with higher river flow, and (d) sufficient river flows for tree and shrub survival and growth. While water withdrawal commonly degrades riverine ecosystems, flow augmentation can provide the opposite outcome, enhancing the river and riparian environments.
英文关键词	environmental flows floods flow augmentation Little Bow River poplars willows
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000569390900001
WOS关键词	CHANNEL MORPHOLOGY ; SOUTHERN ALBERTA ; MILK RIVER ; COTTONWOODS ; RECRUITMENT ; VEGETATION ; PATTERNS ; STREAM ; ESTABLISHMENT ; AUGMENTATION
WOS类目	Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326300
作者单位	[Bigelow, Sarah G.; Samuelson, Glenda M.; Rood, Stewart B.] Univ Lethbridge, Dept Biol Sci, Lethbridge, AB T1K 3M4, Canada; [Hillman, Evan J.] Alberta Agr & Forestry, Lethbridge, AB, Canada; [Hills, Brian] Alberta Environm & Pk, Lethbridge, AB, Canada
推荐引用方式 GB/T 7714	Bigelow, Sarah G.,Hillman, Evan J.,Hills, Brian,et al. Flows for floodplain forests: Conversion from an intermittent to continuous flow regime enabled riparian woodland development along a prairie river[J],2020,36(10):2051-2062.
APA	Bigelow, Sarah G.,Hillman, Evan J.,Hills, Brian,Samuelson, Glenda M.,&Rood, Stewart B..(2020).Flows for floodplain forests: Conversion from an intermittent to continuous flow regime enabled riparian woodland development along a prairie river.RIVER RESEARCH AND APPLICATIONS,36(10),2051-2062.
MLA	Bigelow, Sarah G.,et al."Flows for floodplain forests: Conversion from an intermittent to continuous flow regime enabled riparian woodland development along a prairie river".RIVER RESEARCH AND APPLICATIONS 36.10(2020):2051-2062.