干旱区生态环境知识资源中心(Arid): Persistent and lagged effects of fire on stream solutes linked to intermittent precipitation in arid lands

Arid

DOI	10.1007/s10533-024-01154-y
	Persistent and lagged effects of fire on stream solutes linked to intermittent precipitation in arid lands
	Lowman, Heili; Blaszczak, Joanna; Cale, Ashley; Dong, Xiaoli; Earl, Stevan; Grabow, Julia; Grimm, Nancy B.; Harms, Tamara K.; Melack, John; Reinhold, Ann Marie; Summers, Betsy; Webster, Alex J.
通讯作者	Lowman, H
来源期刊	BIOGEOCHEMISTRY
ISSN	0168-2563
EISSN	1573-515X
出版年	2024
卷号	167 期号:6 页码:777-791
英文摘要	Increased occurrence, size, and intensity of fire result in significant but variable changes to hydrology and material retention in watersheds with concomitant effects on stream biogeochemistry. In arid regions, seasonal and episodic precipitation results in intermittency in flows connecting watersheds to recipient streams that can delay the effects of fire on stream chemistry. We investigated how the spatial extent of fire within watersheds interacts with variability in amount and timing of precipitation to influence stream chemistry of three forested, montane watersheds in a monsoonal climate and four coastal, chaparral watersheds in a Mediterranean climate. We applied state-space models to estimate effects of precipitation, fire, and their interaction on stream chemistry up to five years following fire using 15 + years of monthly observations. Precipitation alone diluted specific conductance and flushed nitrate and phosphate to Mediterranean streams. Fire had positive and negative effects on specific conductance in both climates, whereas ammonium and nitrate concentrations increased following fire in Mediterranean streams. Fire and precipitation had positive interactive effects on specific conductance in monsoonal streams and on ammonium in Mediterranean streams. In most cases, the effects of fire and its interaction with precipitation persisted or were lagged 2-5 years. These results suggest that precipitation influences the timing and intensity of the effects of fire on stream solute dynamics in aridland watersheds, but these responses vary by climate, solute, and watershed characteristics. Time series models were applied to data from long-term monitoring that included observations before and after fire, yielding estimated effects of fire on aridland stream chemistry. This statistical approach captured effects of local-scale temporal variation, including delayed responses to fire, and may be used to reduce uncertainty in predicted responses of water quality under changing fire and precipitation regimes of arid lands.
英文关键词	Fire Arid lands Precipitation Stream Specific conductance Nutrients
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:001242208500001
WOS关键词	WATER-QUALITY ; CRITICAL ZONE ; CALIFORNIA ; WILDFIRE ; SEDIMENT ; NUTRIENT ; VARIABILITY ; IMPACT
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary
WOS研究方向	Environmental Sciences & Ecology ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403011
推荐引用方式 GB/T 7714	Lowman, Heili,Blaszczak, Joanna,Cale, Ashley,et al. Persistent and lagged effects of fire on stream solutes linked to intermittent precipitation in arid lands[J],2024,167(6):777-791.
APA	Lowman, Heili.,Blaszczak, Joanna.,Cale, Ashley.,Dong, Xiaoli.,Earl, Stevan.,...&Webster, Alex J..(2024).Persistent and lagged effects of fire on stream solutes linked to intermittent precipitation in arid lands.BIOGEOCHEMISTRY,167(6),777-791.
MLA	Lowman, Heili,et al."Persistent and lagged effects of fire on stream solutes linked to intermittent precipitation in arid lands".BIOGEOCHEMISTRY 167.6(2024):777-791.