Cattle grazing alters the interaction of seed-borne fungi and two foliar pathogens of Leymus chinensis in a meadow steppe

2019 ◽  
Vol 155 (1) ◽  
pp. 207-218 ◽  
Author(s):  
Yawen Zhang ◽  
Tao Chen ◽  
Zhibiao Nan ◽  
Michael J. Christensen
Keyword(s):  
Cattle Grazing ◽  
Leymus Chinensis ◽  
Meadow Steppe ◽  
Foliar Pathogens

Effect of Grassland Degradation on Arbuscular Mycorrhizal Symbiosis of Leymus chinensis (Trin.) Tzvel. in Different Steppe Types

2013 ◽  
Vol 772 ◽  
pp. 855-857 ◽  
Author(s):  
En Wu ◽  
Li Hua Bai ◽  
Li Xia Cao
Keyword(s):  
Arbuscular Mycorrhizal ◽  
Mycorrhizal Colonization ◽  
Arbuscular Mycorrhizal Symbiosis ◽  
Colonization Rate ◽  
Leymus Chinensis ◽  
Mycorrhizal Symbiosis ◽  
Grassland Degradation ◽  
Meadow Steppe ◽  
The West ◽  
Typical Steppe

This study compared the arbuscular mycorrhizal symbiosis of Leymus chinensis between meadow steppe and typical steppe in the West Ujimqin banner. Mycorrhizal colonization rate and number of rhizosphere spore of L. chinensis decreased from light to heavy grassland degradation in the both of steppes. The mycorrhizal colonization rate and rhizosphere spore number of L. chinensis decreased significantly at moderate-heavy degradation stages in meadow steppe, and the typical steppe occurred in light-moderate degradation stages. These results indicated that the mycorrhizal symbiotic patience of L. chinensis in typical steppe is lower than that of meadow steppe.

Drought sensitivity of aboveground productivity in Leymus chinensis meadow steppe depends on drought timing

Oecologia ◽  
2019 ◽  
Vol 191 (3) ◽  
pp. 685-696 ◽  
Author(s):  
Bo Meng ◽  
Baoku Shi ◽  
Shangzhi Zhong ◽  
Hua Chai ◽  
Shuixiu Li ◽  
...  
Keyword(s):  
Leymus Chinensis ◽  
Meadow Steppe ◽  
Drought Sensitivity ◽  
Aboveground Productivity

scholarly journals Effects of cattle grazing on small mammal communities in the Hulunber meadow steppe

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e2349 ◽  
Author(s):  
Chan Cao ◽  
Ling-Ying Shuai ◽  
Xiao-Ping Xin ◽  
Zhi-Tao Liu ◽  
Yan-Ling Song ◽  
...  
Keyword(s):  
Small Mammals ◽  
Small Mammal ◽  
Grazing Intensity ◽  
Cattle Grazing ◽  
Sustainable Land Use ◽  
Meadow Steppe ◽  
Grazing Intensities ◽  
Small Mammal Communities ◽  
Four Levels ◽  
Mammal Communities

Small mammals play important roles in many ecosystems, and understanding their response to disturbances such as cattle grazing is fundamental for developing sustainable land use strategies. However, how small mammals respond to cattle grazing remains controversial. A potential cause is that most of previous studies adopt rather simple experimental designs based solely on the presence/absence of grazing, and are thus unable to detect any complex relationships between diversity and grazing intensity. In this study, we conducted manipulated experiments in the Hulunber meadow steppe to survey small mammal community structures under four levels of grazing intensities. We found dramatic changes in species composition in native small mammal communities when grazing intensity reached intermediate levels (0.46 animal unit/ha). As grazing intensity increased,Spermophilus dauricusgradually became the single dominant species. Species richness and diversity of small mammals in ungrazed and lightly grazed (0.23 animal unit/ha) area were much higher than in intermediately and heavily grazed area. We did not detect a humped relationship between small mammal diversity and disturbance levels predicted by the intermediate disturbance hypothesis (IDH). Our study highlighted the necessity of conducting manipulated experiments under multiple grazing intensities.

scholarly journals Community Differentiation and Ecological Influencing Factors along Environmental Gradients: Evidence from 1200 km Belt Transect across Inner Mongolia Grassland, China

2021 ◽  
Vol 14 (1) ◽  
pp. 361
Author(s):  
Zhanyong Fu ◽  
Fei Wang ◽  
Zhaohua Lu ◽  
Meng Zhang ◽  
Lin Zhang ◽  
...  
Keyword(s):  
Soil Nutrients ◽  
Inner Mongolia ◽  
Spatial Differentiation ◽  
Leymus Chinensis ◽  
Meadow Steppe ◽  
Temperate Steppe ◽  
Typical Steppe ◽  
Inner Mongolia Grassland ◽  
Temperature And Precipitation ◽  
Belt Transect

In this work, we conducted a 1200 km belt transect for field survey in typical and meadow steppes across Inner Mongolia Plateau in 2018. The field investigation, laboratory soil analysis, and quantitative ecology methods were utilized to explore the differentiation characteristics of the plant community, and their relationships with ecological factors. The results showed that a total of 140 vascular plants within 108 quadrats mainly comprised of Asteraceae, Poaceae, Rosaceae, and Fabaceae. Two-way Indicator Species Analysis (TWINSPAN) revealed eight vegetation typologies: I: Stipa sareptana var. krylovii + Dysphania aristata, II: Stipa grandis + Leymus chinensis, III: Stipa sareptana var. krylovii + Leymus chinensis, IV: Stipa grandis + Cleistogenes squarrosa, V: Stipa grandis + Carex duriuscula, VI: Stipa baicalensis + Leymus chinensis, VII: Carex pediformis + Stipa baicalensis, VIII: Leymus chinensis + Elymus dahuricus. Detrend Correspondence Analysis (DCA) confirmed the above eight vegetation typologies and indicated a relatively small variation. Redundancy analysis (RDA) revealed that the spatial differentiation characteristics in the typical steppe were chiefly driven by precipitation, while the influencing factor in the meadow steppe was soil nutrients, followed by temperature and precipitation. The contrast between typical and meadow steppes revealed that the spatial distribution of typical steppe was influenced by precipitation, while the contribution of heat and water in the meadow steppe was equal. The conclusion revealed that the temperature and precipitation conditions coupled with soil nutrients shaped the spatial differentiation characteristics of temperate steppe vegetation in the Inner Mongolia grassland. Therefore, this study advanced our knowledge of the spatial patterns of temperate steppe along longitude and latitude gradients, providing scientific and theoretical guidance for the biodiversity conservation and sustainable ecosystem management of the Inner Mongolia grassland.

Nitrogen deposition changes the distribution of key plant species in the meadow steppe in Hulunbeier, China

2018 ◽  
Vol 40 (2) ◽  
pp. 129 ◽  
Author(s):  
Wang Xuan ◽  
Wang Xin Ting ◽  
Liang Cun Zhu ◽  
Niu Yong Mei
Keyword(s):  
Spatial Distribution ◽  
Plant Species ◽  
Niche Overlap ◽  
N Deposition ◽  
Nutrient Addition ◽  
Leymus Chinensis ◽  
Point Pattern ◽  
Ecological Change ◽  
Meadow Steppe ◽  
The Impact

Improved understanding of how nutrient levels affect the distribution of plants can provide important insights into the potential impacts of increasing global nitrogen (N) deposition. We used point pattern analyses to examine the impact of nutrient addition on heterogeneity in the spatial distribution of the three main plant species of the meadow steppe community of Hulunbeier, Inner Mongolia: Leymus chinensis (Trin.) Tzvel (aka Aneurotepidimu chinense), a rhizamotous grass; Stipa baicalensis Rasher, a bunch grass; and Artemisia tanacetifolia Linn, a rhizamotous forb. The six treatments tested added nitrogen N in three different concentrations, N with phosphorus (P), P alone and a Control. Although the three plant species were randomly distributed at the start of the experiment in 2011, the spatial distribution of some species in some treatments had changed at the end of 3 years of nutrient addition. There was a significant increase in aggregation of L. chinensis at fine scales of analysis from application of N and P in tandem. However, S. baicalensis and A. tanacetifolia distributions remained random under all treatments. Positive associations of L. chinensis with S. baicalensis and with A. tanacetifolia were apparent at the lowest concentration of added N, 2.5 g N m–2 year–1, which represented an approximate doubling of global N deposition. These associations, which represent clustering among individuals of these species were also apparent where only P was applied. Negative associations, representing dispersion, were prevalent with higher N concentrations. The results indicate that increases in global N deposition up to about double current levels may have a positive influence on meadow steppe communities by increasing the niche overlap of different species. However, increases beyond that level may trigger substantial ecological change through increased competition for other, more limited, environmental resources, and disassociation between plants of the different dominant species. Our findings suggest that studies of the spatial patterning of plant communities can contribute to understanding the potential impacts of climate change.

Plastic responses of stem and leaf functional traits in Leymus chinensis to long-term grazing in a meadow steppe

2014 ◽  
Vol 38 (5) ◽  
pp. 440-451 ◽  
Author(s):  
LI Xi-Liang ◽  
◽  
HOU Xiang-Yang ◽  
WU Xin-Hong ◽  
SARULA ◽  
...  
Keyword(s):  
Functional Traits ◽  
Leymus Chinensis ◽  
Meadow Steppe ◽  
Leaf Functional Traits ◽  
Plastic Responses

Modeling responses of the meadow steppe dominated by Leymus chinensis to climate change

2007 ◽  
Vol 82 (3-4) ◽  
pp. 437-452 ◽  
Author(s):  
Yuhui Wang ◽  
Guangsheng Zhou ◽  
Yonghe Wang
Keyword(s):  
Climate Change ◽  
Leymus Chinensis ◽  
Meadow Steppe

Syntaxonomic changes in the plant cover of meadow steppe in the «Mikhailovskaya Tselina» reserve (Sumy Region, Ukraine)

2006 ◽  
pp. 43-57 ◽  
Author(s):  
H. N. Lysenko ◽  
I. A. Korotchenko
Keyword(s):  
Nature Reserve ◽  
Plant Cover ◽  
Ecological Factors ◽  
Single Species ◽  
Meadow Steppe ◽  
Total Species

Changes in the set of syntaxa have been traced for the plant cover of the «Mikhaylovskaya Tselina» meadow-steppe (an isolated part of the Ukrainian Steppe Nature Reserve, Sumy Region, Ukraine) with the help of the Braun-Blanquet approach. The area vegetation syntaxa prodromus includes 2 classes, 2 rders, 3 alliances, 9 associations, and 6 subasso­ciations, 2 of the latter described anew. The plant cover is highly dynamic and undergoes expressed meso­phytization, especially within the area where strict protection has been maintained since 1961. Amplitudes of the principal ecological factors and also peculiarities of their shift under exogenic regulation are determined with the help of the method of synecological phyto­indication (i. e. not single species but total species sets of communities serve as indicators). The essential transformations of the reserve meadow steppes are probably caused by the «insular» character of the reserve, its small size, also by the poorness of the set of natural grazers and hence the inadequacy of regulation by means of mowing.

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