气候变化领域集成服务门户(CCPortal): Hydrological effects of tree invasion on a dry coastal Hawaiian ecosystem

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DOI	10.1016/j.foreco.2019.117653
	Hydrological effects of tree invasion on a dry coastal Hawaiian ecosystem
	Dudley B.D.; Hughes R.F.; Asner G.P.; Baldwin J.A.; Miyazawa Y.; Dulai H.; Waters C.; Bishop J.; Vaughn N.R.; Yeh J.; Kettwich S.; MacKenzie R.M.; Ostertag R.; Giambelluca T.
发表日期	2020
ISSN	0378-1127
卷号	458
英文摘要	In ecosystems invaded by non-native plants invasion effects are often spatially variable, and this variability is difficult to capture via plot-scale sampling. We used airborne high-resolution LiDAR (Light Detection and Ranging) to generate spatially explicit and contiguous information on hydrological effects of invasive trees (Prosopis pallida (Humb. & Bonpl. ex Willd.) Kunth). We developed regression relationships between LiDAR metrics (i.e., ground elevation and tree canopy height) and plot-scale measurements of vegetation stem water δ18O, to assess groundwater use, and transpiration rates. We used electrical resistivity imaging to assess subsurface geology and hydrology and their relationships to P. pallida stand structure. P. pallida biomass and transpiration varied greatly across the study area; both were controlled by depth to groundwater. Stem water δ18O values (-8.6 to 3.7‰) indicated a threshold ground elevation of ca. 15 m above sea level, above which P. pallida could not access groundwater; this threshold corresponded to declines in tree biomass and height. Transpiration modelled across the study area was 0.034 ± 0.017 mm day−1, but over 98% of transpiration came from the ca. 25% of the total study area where groundwater depths were less than 15 m. Our combination of methods offers a new way to incorporate fine-scale spatial variation into estimation of plant invasion effects on hydrology, increase our understanding of interactions of geology, hydrology, and biology in such invasions, and prioritise areas for control in well-advanced invasions. © 2019 Elsevier B.V.
关键词	Ecosystems Forestry Geology Groundwater Hydrology Imaging techniques Plants (botany)Remote sensing Sea level Transpiration Electrical resistivity imaging High-resolution lidar Hydrological effects Isoscape Regression relationship Retain Riparian Transpiration rates Optical radar electrical resistivity groundwater lidar remote sensing riparian zone spatial variation transpiration water depth Ecosystems Forestry Geology Hydrology Remote Sensing Transpiration Hawaii [United States]United States Prosopis pallida
语种	英语
来源机构	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/133074
推荐引用方式 GB/T 7714	Dudley B.D.,Hughes R.F.,Asner G.P.,et al. Hydrological effects of tree invasion on a dry coastal Hawaiian ecosystem[J]. Forest Ecology and Management,2020,458.
APA	Dudley B.D..,Hughes R.F..,Asner G.P..,Baldwin J.A..,Miyazawa Y..,...&Giambelluca T..(2020).Hydrological effects of tree invasion on a dry coastal Hawaiian ecosystem.,458.
MLA	Dudley B.D.,et al."Hydrological effects of tree invasion on a dry coastal Hawaiian ecosystem".458(2020).