CLIMATIC/EDAPHIC CONTROLS ON SOIL CARBON/NITROGEN RESPONSE TO SHRUB ENCROACHMENT IN DESERT GRASSLAND

2007 ◽  
Vol 17 (7) ◽  
pp. 1911-1928 ◽  
Author(s):  
C. Winston Wheeler ◽  
Steven R. Archer ◽  
Gregory P. Asner ◽  
Chad R. McMurtry
Keyword(s):  
Soil Carbon ◽  
Shrub Encroachment ◽  
Desert Grassland ◽  
Nitrogen Response

scholarly journals Soil carbon release responses to long-term versus short-term climatic warming in an arid ecosystem

2020 ◽  
Vol 17 (3) ◽  
pp. 781-792 ◽  
Author(s):  
Hongying Yu ◽  
Zhenzhu Xu ◽  
Guangsheng Zhou ◽  
Yaohui Shi
Keyword(s):  
Soil Moisture ◽  
Soil Carbon ◽  
Field Experiments ◽  
Sigmoid Function ◽  
Desert Grassland ◽  
Climatic Warming ◽  
Short Term ◽  
Exponential Relationship ◽  
Carbon Release

Abstract. Climate change severely impacts the grassland carbon cycling by altering rates of litter decomposition and soil respiration (Rs), especially in arid areas. However, little is known about the Rs responses to different warming magnitudes and watering pulses in situ in desert steppes. To examine their effects on Rs, we conducted long-term moderate warming (4 years, ∼3 ∘C), short-term acute warming (1 year, ∼4 ∘C) and watering field experiments in a desert grassland of northern China. While experimental warming significantly reduced average Rs by 32.5 % and 40.8 % under long-term moderate and short-term acute warming regimes, respectively, watering pulses (fully irrigating the soil to field capacity) stimulated it substantially. This indicates that climatic warming constrains soil carbon release, which is controlled mainly by decreased soil moisture, consequently influencing soil carbon dynamics. Warming did not change the exponential relationship between Rs and soil temperature, whereas the relationship between Rs and soil moisture was better fitted to a sigmoid function. The belowground biomass, soil nutrition, and microbial biomass were not significantly affected by either long-term or short-term warming regimes, respectively. The results of this study highlight the great dependence of soil carbon emission on warming regimes of different durations and the important role of precipitation pulses during the growing season in assessing the terrestrial ecosystem carbon balance and cycle.

scholarly journals Interactive Effects of Black-Tailed Prairie Dogs and Cattle on Shrub Encroachment in a Desert Grassland Ecosystem

PLoS ONE ◽  
2016 ◽  
Vol 11 (5) ◽  
pp. e0154748 ◽  
Author(s):  
Eduardo Ponce-Guevara ◽  
Ana Davidson ◽  
Rodrigo Sierra-Corona ◽  
Gerardo Ceballos
Keyword(s):  
Shrub Encroachment ◽  
Prairie Dogs ◽  
Interactive Effects ◽  
Grassland Ecosystem ◽  
Desert Grassland

Soil moisture dynamics and deficit of desert grassland with anthropogenic introduced shrub encroachment in the eastern Ningxia, China

2020 ◽  
Vol 40 (4) ◽  
Author(s):  
赵亚楠 ZHAO Yanan ◽  
于露 YU Lu ◽  
周玉蓉 ZHOU Yurong ◽  
王红梅 WANG Hongmei ◽  
马千虎 MA Qianhu ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Shrub Encroachment ◽  
Desert Grassland ◽  
Soil Moisture Dynamics ◽  
Moisture Dynamics

Shrub encroachment increases soil carbon and nitrogen stocks in temperate grasslands in China

2019 ◽  
Vol 30 (7) ◽  
pp. 756-767 ◽  
Author(s):  
He Li ◽  
Haihua Shen ◽  
Luhong Zhou ◽  
Yankun Zhu ◽  
Leiyi Chen ◽  
...  
Keyword(s):  
Soil Carbon ◽  
Shrub Encroachment ◽  
Temperate Grasslands ◽  
Carbon And Nitrogen ◽  
Soil Carbon And Nitrogen ◽  
Carbon And Nitrogen Stocks

scholarly journals Quantifying soil surface change in degraded drylands: Shrub encroachment and effects of fire and vegetation removal in a desert grassland

2012 ◽  
Vol 117 (G2) ◽  
pp. n/a-n/a ◽  
Author(s):  
Joel B. Sankey ◽  
Sujith Ravi ◽  
Cynthia S. A. Wallace ◽  
Robert H. Webb ◽  
Travis E. Huxman
Keyword(s):  
Soil Surface ◽  
Shrub Encroachment ◽  
Desert Grassland ◽  
Surface Change ◽  
Vegetation Removal
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