Changes in soil water dynamics due to variation in precipitation and temperature: An ecohydrological analysis in a tallgrass prairie

被引:38
作者
Bell, Jesse E. [1 ]
Sherry, Rebecca [1 ]
Luo, Yiqi [1 ]
机构
[1] Univ Oklahoma, Dept Bot & Microbiol, Norman, OK 73019 USA
基金
美国国家科学基金会;
关键词
CONTROLLED ECOSYSTEMS; HYDROLOGIC PROCESSES; ACTIVE-ROLE; DOUBLED PRECIPITATION; CO2; MOISTURE; STRESS; VARIABILITY; CARBON; PLANTS;
D O I
10.1029/2009WR007908
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
There is considerable evidence that future global climate change will increase temperature and alter precipitation regime. To better understand how these factors will influence soil water dynamics, it is imperative to use multifactorial experiments. A 1 year "pulse" experiment, with 4 degrees C warming and a doubling in precipitation, was performed to evaluate the changes in soil moisture dynamics. Frequency distribution analyses of soil moisture and soil temperature were used to explore the consequences of climate change on ecohydrological processes at different soil depths. There was a decrease in soil moisture frequency from 0 to 120 cm in both warming and warming with increased precipitation experiments. Different soil depths had similar patterns of change in soil moisture and soil temperature frequency. Additionally, we correlated evapotranspiration and soil moisture to look at changes in evapotranspiration from the wilting point (E-w) to maximum evapotranspiration (E-max). These results revealed a shift in the slope and position of E-w to E-max with experimental warming. Our results showed that the soil moisture dynamics and the ecohydrology were changed by different global climate change scenarios. Understanding the effects of global warming on soil moisture dynamics will be critical for predicting changes in ecosystem level processes.
引用
收藏
页数:11
相关论文
共 50 条
[1]  
[Anonymous], 2007, Climate Change 2007: The Scientific Basis
[2]  
Bowen G. D., 1991, Plant roots: the hidden half., P309
[3]  
Bridgham SD, 1999, ECOL APPL, V9, P1345, DOI 10.1890/1051-0761(1999)009[1345:ECOTAE]2.0.CO
[4]  
2
[5]   Global response of terrestrial ecosystem structure and function to CO2 and climate change:: results from six dynamic global vegetation models [J].
Cramer, W ;
Bondeau, A ;
Woodward, FI ;
Prentice, IC ;
Betts, RA ;
Brovkin, V ;
Cox, PM ;
Fisher, V ;
Foley, JA ;
Friend, AD ;
Kucharik, C ;
Lomas, MR ;
Ramankutty, N ;
Sitch, S ;
Smith, B ;
White, A ;
Young-Molling, C .
GLOBAL CHANGE BIOLOGY, 2001, 7 (04) :357-373
[6]  
Daly E, 2004, J HYDROMETEOROL, V5, P546, DOI 10.1175/1525-7541(2004)005<0546:CDOPTA>2.0.CO
[7]  
2
[8]   Soil water content and temperature as independent or confounded factors controlling soil respiration in a temperate mixed hardwood forest [J].
Davidson, EA ;
Belk, E ;
Boone, RD .
GLOBAL CHANGE BIOLOGY, 1998, 4 (02) :217-227
[9]   LIMITATIONS OF PHOTOSYNTHESIS IN PINUS-TAEDA L (LOBLOLLY-PINE) AT LOW SOIL TEMPERATURES [J].
DAY, TA ;
HECKATHORN, SA ;
DELUCIA, EH .
PLANT PHYSIOLOGY, 1991, 96 (04) :1246-1254
[10]  
Easterling DR, 2000, B AM METEOROL SOC, V81, P417, DOI 10.1175/1520-0477(2000)081<0417:OVATIE>2.3.CO