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

scholarly journals The Influence of Climate Warming and Humidity on Plant Diversity and Soil Bacteria and Fungi Diversity in Desert Grassland

Plants ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 2580
Author(s):  
Yi Zhang ◽  
Yingzhong Xie ◽  
Hongbin Ma ◽  
Juan Zhang ◽  
Le Jing ◽  
...  
Keyword(s):  
Plant Diversity ◽  
Soil Bacteria ◽  
Interactive Effects ◽  
Desert Grassland ◽  
Plant Soil ◽  
Β Diversity ◽  
Temperature And Precipitation ◽  
Α Diversity ◽  
Soil Bacteria And Fungi ◽  
Bacteria And Fungi

Our study, which was conducted in the desert grassland of Ningxia in China (E 107.285, N 37.763), involved an experiment with five levels of annual precipitation 33% (R33), 66% (R66), 100% (CK), 133% (R133), 166% (R166) and two temperature levels (inside Open-Top Chamber (OTC) and outside OTC). Our objective was to determine how plant, soil bacteria, and fungi diversity respond to climate change. Our study suggested that plant α-diversity in CK and TCK were significantly higher than that of other treatments. Increased precipitation promoted root biomass (RB) growth more than aboveground living biomass (ALB). R166 promoted the biomass of Agropyron mongolicum the most. In the fungi communities, temperature and precipitation interaction promoted α-diversity. In the fungi communities, the combination of increased temperature and natural precipitation (TCK) promoted β-diversity the most, whose distance was determined to be 25,124 according to PCA. In the bacteria communities, β-diversity in CK was significantly higher than in other treatments, and the distance was determined to be 3010 according to PCA. Soil bacteria and fungi α- and β-diversity, and ALB promoted plant diversity the most. The interactive effects of temperature and precipitation on C, N, and P contents of plants were larger than their independent effects.

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

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

scholarly journals Nonlinear instability and sensitivity of a theoretical grassland ecosystem to finite-amplitude perturbations

2007 ◽  
Vol 14 (4) ◽  
pp. 409-423 ◽  
Author(s):  
M. Mu ◽  
B. Wang
Keyword(s):  
Finite Amplitude ◽  
Nonlinear Instability ◽  
Grassland Ecosystem ◽  
Desert Grassland ◽  
Moisture Index ◽  
New Approach ◽  
Singular Vectors ◽  
Natural Factors ◽  
Nonlinear Features ◽  
Model Context

Abstract. Within a theoretical model context, the sensitivity and instability of the grassland ecosystem to finite-amplitude perturbations are studied. A new approach of conditional nonlinear optimal perturbations (CNOPs) is adopted to investigate this nonlinear problem. It is shown that the linearly stable grassland (desert) states can be nonlinearly unstable with finite-amplitude initial perturbations, which represent the human activities and natural factors on the ecosystem. When the moisture index is between the two bifurcation points, a large enough finite amplitude perturbation can induce a transition from the grassland (desert) state to the desert (grassland) state. The thresholds of such transition along the bifurcation diagram of the moisture index are also given by the CNOPs approach. The results also support the viewpoint of Zeng et al., whose emphasis is on the shading effect of wilted grass on the grassland ecosystem. Comparisons between the results obtained by approach of CNOPs and linear singular vectors are made, which demonstrates that CNOPs is a useful tool to explore the nonlinear features of the ecosystem.

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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