Ecohydrological responses to multifactor global change in a tallgrass prairie: A modeling analysis

Jesse Eugene Bell, Ensheng Weng, Yiqi Luo

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Relative impacts of multiple global change factors on ecohydrological processes in terrestrial ecosystems have not been carefully studied. In this study, we used a terrestrial ecosystem (TECO) model to examine effects of three global change factors (i.e., climate warming, elevated CO2, and altered precipitation) individually and in combination on runoff, evaporation, transpiration, rooting zone soil moisture content, water use efficiency (WUE), and rain use efficiency (RUE) in a North American tallgrass prairie. We conducted a total of 200 different scenarios with gradual changes of the three factors for 100 years. Our modeling results show strong responses of runoff, evaporation, transpiration, and rooting zone soil moisture to changes in temperature and precipitation, while effects of CO2 changes were relatively minor. For example, runoff decreased by 50% with a 10°C increase in temperature and increased by 250% with doubled precipitation. Ecosystem-level RUE increased with CO2, decreased with precipitation, and optimized at 4-6°C of warming. In contrast, plant-level WUE was highest at doubled CO2, doubled precipitation, and ambient temperature. The different response patterns of RUE and WUE signify that processes at different scales responded uniquely to climate change. Combinations of temperature, CO 2, and precipitation anomalies interactively affected response magnitude and/or patterns of ecohydrological processes. Our results suggest that ecohydrological processes were considerably affected by global change factors and then likely regulate other ecosystem processes, such as carbon and nitrogen cycling. In particular, substantial changes in runoff to different climate change scenarios could have policy implications because it is a major component to replenishing freshwater. These modeling results should be tested by and could influence design of field experiments on ecohydrological processes.

Original languageEnglish (US)
Article numberG04042
JournalJournal of Geophysical Research: Biogeosciences
Volume115
Issue number4
DOIs
StatePublished - Dec 1 2010

Fingerprint

grasslands
global change
prairies
prairie
runoff
water use efficiency
ecosystems
drainage
Runoff
Ecosystems
rain
rooting
terrestrial ecosystem
transpiration
modeling
Rain
evaporation
Transpiration
soil moisture
warming

ASJC Scopus subject areas

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

Cite this

Ecohydrological responses to multifactor global change in a tallgrass prairie : A modeling analysis. / Bell, Jesse Eugene; Weng, Ensheng; Luo, Yiqi.

In: Journal of Geophysical Research: Biogeosciences, Vol. 115, No. 4, G04042, 01.12.2010.

Research output: Contribution to journalArticle

@article{891e2220fe1d43afaf2ed99f2c2344c2,
title = "Ecohydrological responses to multifactor global change in a tallgrass prairie: A modeling analysis",
abstract = "Relative impacts of multiple global change factors on ecohydrological processes in terrestrial ecosystems have not been carefully studied. In this study, we used a terrestrial ecosystem (TECO) model to examine effects of three global change factors (i.e., climate warming, elevated CO2, and altered precipitation) individually and in combination on runoff, evaporation, transpiration, rooting zone soil moisture content, water use efficiency (WUE), and rain use efficiency (RUE) in a North American tallgrass prairie. We conducted a total of 200 different scenarios with gradual changes of the three factors for 100 years. Our modeling results show strong responses of runoff, evaporation, transpiration, and rooting zone soil moisture to changes in temperature and precipitation, while effects of CO2 changes were relatively minor. For example, runoff decreased by 50{\%} with a 10°C increase in temperature and increased by 250{\%} with doubled precipitation. Ecosystem-level RUE increased with CO2, decreased with precipitation, and optimized at 4-6°C of warming. In contrast, plant-level WUE was highest at doubled CO2, doubled precipitation, and ambient temperature. The different response patterns of RUE and WUE signify that processes at different scales responded uniquely to climate change. Combinations of temperature, CO 2, and precipitation anomalies interactively affected response magnitude and/or patterns of ecohydrological processes. Our results suggest that ecohydrological processes were considerably affected by global change factors and then likely regulate other ecosystem processes, such as carbon and nitrogen cycling. In particular, substantial changes in runoff to different climate change scenarios could have policy implications because it is a major component to replenishing freshwater. These modeling results should be tested by and could influence design of field experiments on ecohydrological processes.",
author = "Bell, {Jesse Eugene} and Ensheng Weng and Yiqi Luo",
year = "2010",
month = "12",
day = "1",
doi = "10.1029/2009JG001120",
language = "English (US)",
volume = "115",
journal = "Journal of Geophysical Research: Atmospheres",
issn = "0148-0227",
publisher = "American Geophysical Union",
number = "4",

}

TY - JOUR

T1 - Ecohydrological responses to multifactor global change in a tallgrass prairie

T2 - A modeling analysis

AU - Bell, Jesse Eugene

AU - Weng, Ensheng

AU - Luo, Yiqi

PY - 2010/12/1

Y1 - 2010/12/1

N2 - Relative impacts of multiple global change factors on ecohydrological processes in terrestrial ecosystems have not been carefully studied. In this study, we used a terrestrial ecosystem (TECO) model to examine effects of three global change factors (i.e., climate warming, elevated CO2, and altered precipitation) individually and in combination on runoff, evaporation, transpiration, rooting zone soil moisture content, water use efficiency (WUE), and rain use efficiency (RUE) in a North American tallgrass prairie. We conducted a total of 200 different scenarios with gradual changes of the three factors for 100 years. Our modeling results show strong responses of runoff, evaporation, transpiration, and rooting zone soil moisture to changes in temperature and precipitation, while effects of CO2 changes were relatively minor. For example, runoff decreased by 50% with a 10°C increase in temperature and increased by 250% with doubled precipitation. Ecosystem-level RUE increased with CO2, decreased with precipitation, and optimized at 4-6°C of warming. In contrast, plant-level WUE was highest at doubled CO2, doubled precipitation, and ambient temperature. The different response patterns of RUE and WUE signify that processes at different scales responded uniquely to climate change. Combinations of temperature, CO 2, and precipitation anomalies interactively affected response magnitude and/or patterns of ecohydrological processes. Our results suggest that ecohydrological processes were considerably affected by global change factors and then likely regulate other ecosystem processes, such as carbon and nitrogen cycling. In particular, substantial changes in runoff to different climate change scenarios could have policy implications because it is a major component to replenishing freshwater. These modeling results should be tested by and could influence design of field experiments on ecohydrological processes.

AB - Relative impacts of multiple global change factors on ecohydrological processes in terrestrial ecosystems have not been carefully studied. In this study, we used a terrestrial ecosystem (TECO) model to examine effects of three global change factors (i.e., climate warming, elevated CO2, and altered precipitation) individually and in combination on runoff, evaporation, transpiration, rooting zone soil moisture content, water use efficiency (WUE), and rain use efficiency (RUE) in a North American tallgrass prairie. We conducted a total of 200 different scenarios with gradual changes of the three factors for 100 years. Our modeling results show strong responses of runoff, evaporation, transpiration, and rooting zone soil moisture to changes in temperature and precipitation, while effects of CO2 changes were relatively minor. For example, runoff decreased by 50% with a 10°C increase in temperature and increased by 250% with doubled precipitation. Ecosystem-level RUE increased with CO2, decreased with precipitation, and optimized at 4-6°C of warming. In contrast, plant-level WUE was highest at doubled CO2, doubled precipitation, and ambient temperature. The different response patterns of RUE and WUE signify that processes at different scales responded uniquely to climate change. Combinations of temperature, CO 2, and precipitation anomalies interactively affected response magnitude and/or patterns of ecohydrological processes. Our results suggest that ecohydrological processes were considerably affected by global change factors and then likely regulate other ecosystem processes, such as carbon and nitrogen cycling. In particular, substantial changes in runoff to different climate change scenarios could have policy implications because it is a major component to replenishing freshwater. These modeling results should be tested by and could influence design of field experiments on ecohydrological processes.

UR - http://www.scopus.com/inward/record.url?scp=78650938038&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=78650938038&partnerID=8YFLogxK

U2 - 10.1029/2009JG001120

DO - 10.1029/2009JG001120

M3 - Article

AN - SCOPUS:78650938038

VL - 115

JO - Journal of Geophysical Research: Atmospheres

JF - Journal of Geophysical Research: Atmospheres

SN - 0148-0227

IS - 4

M1 - G04042

ER -