Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017WR020823 |
Improving ecosystem-scale modeling of evapotranspiration using ecological mechanisms that account for compensatory responses following disturbance | |
Millar, David J.1; Ewers, Brent E.1; Mackay, Scott2; Peckham, Scott1; Reed, David E.3; Sekoni, Adewale4 | |
2017-09-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:9 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Mountain pine beetle outbreaks in western North America have led to extensive forest mortality, justifiably generating interest in improving our understanding of how this type of ecological disturbance affects hydrological cycles. While observational studies and simulations have been used to elucidate the effects of mountain beetle mortality on hydrological fluxes, an ecologically mechanistic model of forest evapotranspiration (ET) evaluated against field data has yet to be developed. In this work, we use the Terrestrial Regional Ecosystem Exchange Simulator (TREES) to incorporate the ecohydrological impacts of mountain pine beetle disturbance on ET for a lodgepole pine-dominated forest equipped with an eddy covariance tower. An existing degree-day model was incorporated that predicted the life cycle of mountain pine beetles, along with an empirically derived submodel that allowed sap flux to decline as a function of temperature-dependent blue stain fungal growth. The eddy covariance footprint was divided into multiple cohorts for multiple growing seasons, including representations of recently attacked trees and the compensatory effects of regenerating understory, using two different spatial scaling methods. Our results showed that using a multiple cohort approach matched eddy covariance-measured ecosystem-scale ET fluxes well, and showed improved performance compared to model simulations assuming a binary framework of only areas of live and dead overstory. Cumulative growing season ecosystem-scale ET fluxes were 8 - 29% greater using the multicohort approach during years in which beetle attacks occurred, highlighting the importance of including compensatory ecological mechanism in ET models. |
英文关键词 | ecohydrology evapotranspiration forest disturbance bark beetle model |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000413484200020 |
WOS关键词 | LODGEPOLE PINE FORESTS ; INDUCED TREE MORTALITY ; WESTERN UNITED-STATES ; BARK BEETLE OUTBREAK ; EDDY-COVARIANCE ; SAP FLOW ; CLIMATE-CHANGE ; HYDROLOGIC MODEL ; LEAF-AREA ; WATER-USE |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/21458 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Wyoming, Bot Dept, Laramie, WY 82071 USA; 2.SUNY Buffalo, Dept Geog, Buffalo, NY USA; 3.Univ Wisconsin, Dept Atmospher & Ocean Sci, Madison, WI USA; 4.Univ Wyoming, Comp Sci Dept, Laramie, WY 82071 USA |
推荐引用方式 GB/T 7714 | Millar, David J.,Ewers, Brent E.,Mackay, Scott,et al. Improving ecosystem-scale modeling of evapotranspiration using ecological mechanisms that account for compensatory responses following disturbance[J]. WATER RESOURCES RESEARCH,2017,53(9). |
APA | Millar, David J.,Ewers, Brent E.,Mackay, Scott,Peckham, Scott,Reed, David E.,&Sekoni, Adewale.(2017).Improving ecosystem-scale modeling of evapotranspiration using ecological mechanisms that account for compensatory responses following disturbance.WATER RESOURCES RESEARCH,53(9). |
MLA | Millar, David J.,et al."Improving ecosystem-scale modeling of evapotranspiration using ecological mechanisms that account for compensatory responses following disturbance".WATER RESOURCES RESEARCH 53.9(2017). |
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