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Guanghui Lv
College of Resources and Environment Science, Xinjiang University, Urumqi, Xinjiang 830046, PR China

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Journal article
Published: 27 July 2021 in CATENA
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Soil respiration (Rs) has significant spatial changes in terrestrial ecosystems, especially in arid areas where ecological factors and vegetation distribution have obvious patches. Despite growing interest regarding the variation of Rs and its driving factors, most studies have ignored the spatial heterogeneity in the relationship between Rs and driving factors. Sampling plots (100 m × 100 m) were arranged along a vertical transect from the river including the three habitat types of river bank (RB), transitional zone (TZ), and desert margin (DM) in arid area of northwest China. The Rs, soil microclimate (soil temperature and soil water content), and soil nutrients of different habitats were synchronously monitored. Geostatistics and geographically weighted regression (GWR) methods were used to evaluate the spatial variability of Rs and its relationship with driving factors. The mean value of Rs in RB (0.29 ± 0.25 μmol m−2 s−1) was significantly higher than that in TZ (0.18 ± 0.10 μmol m−2 s−1) and DM (0.12 ± 0.11 μmol m−2 s−1). The degree of spatial dependence of Rs in RB was higher than that in TZ, and the spatial structure of Rs was not detected in DM. The GWR model can clearly reflect significant spatial differences in the effects of driving factors on Rs. Soil microclimate, total nitrogen, and soil pH had a strong influence on the spatial variation of Rs in RB. Soil microclimate, ammonium nitrogen, nitrate nitrogen, available phosphorus, and organic matter had strong effects on the spatial variation of Rs in TZ, and soil microclimate, total phosphorus, and organic matter had stronger effects on the spatial variation of Rs in DM. The results indicate that the GWR model can reveal the complex spatial relationship between Rs and driving factors in detail, and provide a new direction for exploring the spatial heterogeneity of Rs.

ACS Style

Jinlong Wang; Dexiong Teng; Xuemin He; Lu Qin; Xiaodong Yang; Guanghui Lv. Spatial non-stationarity effects of driving factors on soil respiration in an arid desert region. CATENA 2021, 207, 105617 .

AMA Style

Jinlong Wang, Dexiong Teng, Xuemin He, Lu Qin, Xiaodong Yang, Guanghui Lv. Spatial non-stationarity effects of driving factors on soil respiration in an arid desert region. CATENA. 2021; 207 ():105617.

Chicago/Turabian Style

Jinlong Wang; Dexiong Teng; Xuemin He; Lu Qin; Xiaodong Yang; Guanghui Lv. 2021. "Spatial non-stationarity effects of driving factors on soil respiration in an arid desert region." CATENA 207, no. : 105617.

Journal article
Published: 29 April 2021 in Sustainability
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The difference of functional traits among different species is the basis of species coexistence in natural ecosystems, and the variation of traits among individuals within species also plays an important role in species coexistence and distribution. Taking the desert plant community of Ebinur Lake as the research object, five plant functional characteristics were measured in 13 plants of 25 quadrats in the study area. The changes of these five functional characteristics by the method of character gradient analysis and the scale variation of plant functional traits and the correlation between their environments were studied. The results showed that: (1) the range of α value of the five plant functional characteristics in the community was larger than that of β value; that is, the change of the character value of a species relative to related symbiotic species was larger than that along the average character gradient of the community. (2) The correlations between leaf thickness and leaf area as well as between leaf thickness and leaf dry matter content were the strongest with correlation coefficients. That is, the correlations between LTH and SLA as well as between LTH and LDMC were stronger than that between the two species in the community, suggesting that the development of succession had no significant effect. The strategies used by dominant species to adapt to the environment changed from high-speed growth to improving resource utilization efficiency, while the coexisting species in the same community adopted different character combinations to adapt to the common community environment.

ACS Style

Hanpeng Li; Guanghui Lv; Lamei Jiang; Jinlong Wang. Scale Change and Correlation of Plant Functional Characteristics in the Desert Community of Ebinur Lake. Sustainability 2021, 13, 4983 .

AMA Style

Hanpeng Li, Guanghui Lv, Lamei Jiang, Jinlong Wang. Scale Change and Correlation of Plant Functional Characteristics in the Desert Community of Ebinur Lake. Sustainability. 2021; 13 (9):4983.

Chicago/Turabian Style

Hanpeng Li; Guanghui Lv; Lamei Jiang; Jinlong Wang. 2021. "Scale Change and Correlation of Plant Functional Characteristics in the Desert Community of Ebinur Lake." Sustainability 13, no. 9: 4983.

Journal article
Published: 20 February 2021 in Forests
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A persistent problem in surface flux research is that turbulent fluxes observed by eddy covariance methods tend to be lower than the available energy. Using 7 years of eddy covariance flux observations in the Ebinur Lake National Wetland Nature Reserve (ELNWNR) in Xinjiang, Northwest China, this study analyzes the surface–atmosphere energy transfer characteristics at the station to explore variation characteristics of the energy flux and the energy balance closure (EBC), and the factors that influence EBC. The results show that: (1) diurnal and seasonal variations are observed in turbulent flux, available energy, and the partitioning of sensible and latent fluxes affected by environmental factors; (2) the degree of EBC varies significantly diurnally and seasonally, with EBC during the growing season significantly higher than during the dormant season; (3) due to the surface heterogeneity, EBC exhibits significant variations with wind direction that differ between the growing and dormant seasons; (4) environmental factors (e.g., vapor pressure deficit and air temperature) are important in limiting near-surface EBC, but they play a secondary role compared with the state of atmospheric motion. This study provides a basis for accurately assessing the material and energy exchanges between the desert Tugai forest ecosystem and the atmosphere.

ACS Style

Dexiong Teng; Xuemin He; Lu Qin; Guanghui Lv. Energy Balance Closure in the Tugai Forest in Ebinur Lake Basin, Northwest China. Forests 2021, 12, 243 .

AMA Style

Dexiong Teng, Xuemin He, Lu Qin, Guanghui Lv. Energy Balance Closure in the Tugai Forest in Ebinur Lake Basin, Northwest China. Forests. 2021; 12 (2):243.

Chicago/Turabian Style

Dexiong Teng; Xuemin He; Lu Qin; Guanghui Lv. 2021. "Energy Balance Closure in the Tugai Forest in Ebinur Lake Basin, Northwest China." Forests 12, no. 2: 243.

Journal article
Published: 16 January 2021 in Ecotoxicology and Environmental Safety
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Essential oils have been evaluated as appropriate phytotoxins with mechanisms of action that are different from those of synthetic herbicides applied in weed management activities, but little is known about the effect of Ambrosia artemisiifolia essential oil (EO) on weeds. Here, the chemical composition of A. artemisiifolia EO was analyzed using a Gas Chromatography-Mass Spectrometry system. and the phytotoxic activities of the EO against monocot (Poa annua, Setaria viridis) and dicot (Amaranthus retroflexus, Medicago sativa) species are evaluated under laboratory and green-house conditions for the first time. The EO was rich in sesquiterpenes (62.51%), with germacrene D (32.92%), β-pinene (15.14%), limonene (9.90%), and caryophyllene (4.49%) being the major compounds based on Gas Chromatography-Mass Spectrometry analysis results. A. artemisiifolia EO inhibited seed germination and seedling development significantly in the tested species even at low concentrations (0.25 mg mL−1). In addition, bioassay results for the activities of superoxide dismutase (SOD) and peroxidase (POD) increased and then decreased with an increase in EO concentration. Unlike the enzymatic activity, root cell viability declined significantly in the tested weeds in all EO treatments. Besides, a foliar spray experiment resulted in visible injury in leaves and a decrease in chlorophyll content and eventually led to wilting of all tested weeds. The EO (0.25–5.00 mg mL−1) altered Allium cepa root tip cells with a decline in mitotic index and an increase in chromosomal aberrations after 24 h treatment. The cytotoxic evaluation confirmed the mitotic inhibitory effect of EO, although the intensity varied under different concentrations. According to the results, A. artemisiifolia EO has the potential applications as a natural herbicide owing to its phytotoxic activity; which also helps to explain their potential involvement in allelopathic interaction of volatile compounds present in the EO that facilitate the invasion success of the exotic species.

ACS Style

Caixia Han; Hua Shao; Shixing Zhou; Yu Mei; Zhenrui Cheng; Ling Huang; Guanghui Lv. Chemical composition and phytotoxicity of essential oil from invasive plant, Ambrosia artemisiifolia L. Ecotoxicology and Environmental Safety 2021, 211, 111879 .

AMA Style

Caixia Han, Hua Shao, Shixing Zhou, Yu Mei, Zhenrui Cheng, Ling Huang, Guanghui Lv. Chemical composition and phytotoxicity of essential oil from invasive plant, Ambrosia artemisiifolia L. Ecotoxicology and Environmental Safety. 2021; 211 ():111879.

Chicago/Turabian Style

Caixia Han; Hua Shao; Shixing Zhou; Yu Mei; Zhenrui Cheng; Ling Huang; Guanghui Lv. 2021. "Chemical composition and phytotoxicity of essential oil from invasive plant, Ambrosia artemisiifolia L." Ecotoxicology and Environmental Safety 211, no. : 111879.

Journal article
Published: 10 September 2020 in Sustainability
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Halophytes have been studied as a model for morphological traits of adaptation to saline environments. However, little information has been given on plant growth, chlorophyll fluorescence responses, and change of ion content in halophytes grown in an aniline–salinity coexistent environment. This study hypothesized that aniline could induce alterations in plant growth, chlorophyll fluorescence, and ion content in Suaeda salsa, but salinity could promote the tolerance of halophytes to aniline. A 6 (aniline) × 3 (NaCl) factorial experiment (for a total of 18 treatments) was conducted to test the above hypothesis. After 30 d of cultivation, roots and shoots were harvested separately to analyze the effects of salinity on the seedling growth under aniline stress. Biomass accumulation was inhibited by aniline treatment, and the inhibition was significantly alleviated by 200 mM NaCl. The change in chlorophyll fluorescence in leaves with aniline stress was moderated by the addition of NaCl. The removal efficiency of aniline was significantly enhanced by moderate salinity. Aniline stress decreased the accumulation of Mg2+, but various concentrations of NaCl increased the accumulation of Mg2+, especially with 200 mM NaCl in both roots and shoots. Both aniline and salinity decreased the content of Ca2+. There was a negative correlation between the K+ and NaCl concentrations and between the Cl− and aniline concentrations. Our results indicated that Suaeda salsa may be suitable for the remediation of salinity and aniline-enriched wastewater.

ACS Style

Jie Xu; Yi Liu; Chao Zhu; Honglei Jia; Changyan Tian; Hongrui Ma; Guanghui Lv. NaCl Improves Suaeda salsa Aniline Tolerance in Wastewater. Sustainability 2020, 12, 7457 .

AMA Style

Jie Xu, Yi Liu, Chao Zhu, Honglei Jia, Changyan Tian, Hongrui Ma, Guanghui Lv. NaCl Improves Suaeda salsa Aniline Tolerance in Wastewater. Sustainability. 2020; 12 (18):7457.

Chicago/Turabian Style

Jie Xu; Yi Liu; Chao Zhu; Honglei Jia; Changyan Tian; Hongrui Ma; Guanghui Lv. 2020. "NaCl Improves Suaeda salsa Aniline Tolerance in Wastewater." Sustainability 12, no. 18: 7457.

Journal article
Published: 26 June 2020 in Water
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Based on the concept of microbial community multi-processing in integrated spatial bacterial succession (ISBS), this study constructs a highly efficient cellular fixed-bed bioreactor that follows the growth of biological flora in the wastewater treatment process. The reactor is organically partitioned based on synergistic laws and in accordance with environmental and microbial metabolic changes, and sewage is subjected to unitized and specialized biological treatment under direct current conditions. The results show that the ISBS reactor exhibits stable nitrogen removal performance under a low-carbon source. Compared with traditional sewage biochemical treatment technology, the microbial concentration is increased by 2–3 times and even up to 12 times, and the ammonia nitrogen removal rate is maintained at 99%. The removal rate reaches 90% (hydraulic retention time of 14 h). High-throughput sequencing analysis based on 16S rDNA reveals the microbial community structure succession at different depths of the same section of the reactor. The microbial community is rich under the influence of environmental factors and exhibits different responses. The intervals vary. An analysis of the microbial community function explains why the ISBS reactor has high nitrogen removal efficiency.

ACS Style

Jie Xu; Chao Zhu; Yi Liu; Guanghui Lv; Changyan Tian; Hongrui Ma. Nitrogen Removal Efficiency and Microbial Community Analysis of a High-Efficiency Honeycomb Fixed-Bed Bioreactor. Water 2020, 12, 1832 .

AMA Style

Jie Xu, Chao Zhu, Yi Liu, Guanghui Lv, Changyan Tian, Hongrui Ma. Nitrogen Removal Efficiency and Microbial Community Analysis of a High-Efficiency Honeycomb Fixed-Bed Bioreactor. Water. 2020; 12 (6):1832.

Chicago/Turabian Style

Jie Xu; Chao Zhu; Yi Liu; Guanghui Lv; Changyan Tian; Hongrui Ma. 2020. "Nitrogen Removal Efficiency and Microbial Community Analysis of a High-Efficiency Honeycomb Fixed-Bed Bioreactor." Water 12, no. 6: 1832.

Articles
Published: 01 June 2020 in Human and Ecological Risk Assessment: An International Journal
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The leaf anatomy of the Nitraria roborowskii Kom., Nitraria sibirica Pall., and Nitraria tangutorum Bobr. populations from southern Xinjiang, China, were studied. Cross-sections of the leaves were made, and the structural characteristics were determined. Seven major traits of the leaf cross-sections were analyzed by cluster analysis. The leaf morphology and anatomical structure of Nitraria leaves from different populations significantly differed, but the coefficient of variation between different populations was not significant. Leaf palisade and spongy tissues were positively correlated with the mean temperature, average sunshine, and annual precipitation of the habitat. Populations were divided into three main categories: Class I (XBC-2 and XBC-3), which included plants that grew at higher altitudes and were exposed to longer than average sunshine time; Class II (XBC-1, BC-1, and DBC-1), which included plants that grew at lower latitudes and had longer than average sunshine time; and Class III (BC-2, BC-3, DBC-1, and DBC-2), which included plants that grew at intermediate latitudes. Habitat and climate were the main factors associated with phenotype differences among the populations of the three Nitraria species.

ACS Style

Shangfu Ren; Guanghui Lv; Dexiong Teng. Anatomical structure of Nitraria spp. leaves from different habitats in Southern Xinjiang, China. Human and Ecological Risk Assessment: An International Journal 2020, 27, 790 -803.

AMA Style

Shangfu Ren, Guanghui Lv, Dexiong Teng. Anatomical structure of Nitraria spp. leaves from different habitats in Southern Xinjiang, China. Human and Ecological Risk Assessment: An International Journal. 2020; 27 (3):790-803.

Chicago/Turabian Style

Shangfu Ren; Guanghui Lv; Dexiong Teng. 2020. "Anatomical structure of Nitraria spp. leaves from different habitats in Southern Xinjiang, China." Human and Ecological Risk Assessment: An International Journal 27, no. 3: 790-803.

Journal article
Published: 12 August 2019 in Human and Ecological Risk Assessment: An International Journal
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ACS Style

Feng-Lan Hou; Guang-Hui Lv; De-Xiong Teng. Spatial variability characteristics and environmental effects of heavy metals in surface riparian soils and surface sediments of Qinggeda Lake. Human and Ecological Risk Assessment: An International Journal 2019, 26, 2027 -2043.

AMA Style

Feng-Lan Hou, Guang-Hui Lv, De-Xiong Teng. Spatial variability characteristics and environmental effects of heavy metals in surface riparian soils and surface sediments of Qinggeda Lake. Human and Ecological Risk Assessment: An International Journal. 2019; 26 (8):2027-2043.

Chicago/Turabian Style

Feng-Lan Hou; Guang-Hui Lv; De-Xiong Teng. 2019. "Spatial variability characteristics and environmental effects of heavy metals in surface riparian soils and surface sediments of Qinggeda Lake." Human and Ecological Risk Assessment: An International Journal 26, no. 8: 2027-2043.

Articles
Published: 19 May 2019 in Systematics and Biodiversity
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The Pleistocene climatic oscillations had profound effects on the demographic history and genetic diversification of plants in arid north-west China where some glacial refugia have been recognized. The genus Ixiolirion comprises three species, of which two, I. tataricum and I. songaricum (endemic), occur in China. In some locations they are sympatric. We investigated their population structure and population history in response to past climatic change using a sample of 619 individuals in 34 populations with nITS and ptDNA sequences. A significant genetic divergence between the two species was supported by a high level of pairwise genetic differentiation, very low gene flow, and phylogenetic analysis showing that I. songaricum haplotypes were monophyletic, whereas those of I. tataricum were polyphyletic. We found significant differentiation and phylogeographic structure in both species. The split of the two species was dated to the late Miocene (∼7 Ma), but deep divergence occurred in the mid-late Quaternary. A similar haplotype distribution pattern was found in both species: one to two dominant haplotypes across most populations, with unique haplotypes in a few populations or a geographic group. The genetic diversity, haplotype number, and haplotype diversity decreased from the Yili Valley to the central Tianshan and Barluk Mountains. Additionally, ptDNA analysis showed that I. tataricum diversified in the eastern Tianshan and Barluk Mountains, which might be due to physical barriers to long distance seed dispersal such as desert. In conclusion, our results indicated that the Yili Valley was likely a glacial refuge for Ixiolirion in China, with postglacial dispersal from the Yili Valley eastward to the eastern Tianshan Mountains, and northward to the Barluk Mountains. The climatic changes in the Miocene and Pleistocene and geographic barriers are important factors driving species divergence and differentiation of Ixiolirion and other taxa.

ACS Style

Yan Li; Feng Song; Xue-Ni Zhang; Guang-Hui Lv. Phylogeography suggest the Yili Valley being the glacial refuge of the genus Ixiolirion (Amaryllidaceae) in China. Systematics and Biodiversity 2019, 17, 385 -401.

AMA Style

Yan Li, Feng Song, Xue-Ni Zhang, Guang-Hui Lv. Phylogeography suggest the Yili Valley being the glacial refuge of the genus Ixiolirion (Amaryllidaceae) in China. Systematics and Biodiversity. 2019; 17 (4):385-401.

Chicago/Turabian Style

Yan Li; Feng Song; Xue-Ni Zhang; Guang-Hui Lv. 2019. "Phylogeography suggest the Yili Valley being the glacial refuge of the genus Ixiolirion (Amaryllidaceae) in China." Systematics and Biodiversity 17, no. 4: 385-401.

Journal article
Published: 05 May 2019 in Sustainability
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Irrational use and management of water and land are associated with poor hydro-geological conditions causing water logging and salinization problems, possibly leading to farmland abandonment and economic loss. This poses a great challenge to the sustainability of oasis’ and requires desalinization through reasonable landscape design by multiple crossing studies so we collected traditional knowledge by field interviews and literature schemes, except for the modern desalinization approaches by literature, and we found that the salinization problem has been solved by traditional land reclamation, traditional drainage, natural drainage and flood irrigation, locally. It is worth mentioning that the traditional reclamation in salinized areas requires flood water, sand dunes and a salinized pit area; the sand dunes are used to elevate the pit surface, and water is used to leach salt from the soil. Natural drainage (the depth and width are 4–10 m and 50–100 m, respectively) caused by flash flooding has significant benefits to some salinized villages in the range of 3000–5000 m and ancient groundwater drainage systems, such as Karez are supporting the oasis with drainage water for centuries. In addition landscape characteristics, salinization and hydro-geological conditions of the oasis were studied from Landsat image, DEM, literature and field photos. Then based on the gathered information above, a desalinization model was developed to decrease the groundwater table and salt leaching in the water logging landscape. Then according to landscape characteristics, different desalinization approaches were recommended for different landscapes. To address environmental uncertainties, an adaptive landscape management and refinement approach was developed, and acceptance of the model was validated by stakeholder opinion. The results provide guidelines for sustainable desalinization design and highlight the importance of combining traditional knowledge and modern ecological principles in sustainable landscape design.

ACS Style

Jumeniyaz Seydehmet; Guang-Hui Lv; Abdugheni Abliz. Landscape Design as a Tool to Reduce Soil Salinization: The Study Case of Keriya Oasis (NW China). Sustainability 2019, 11, 2578 .

AMA Style

Jumeniyaz Seydehmet, Guang-Hui Lv, Abdugheni Abliz. Landscape Design as a Tool to Reduce Soil Salinization: The Study Case of Keriya Oasis (NW China). Sustainability. 2019; 11 (9):2578.

Chicago/Turabian Style

Jumeniyaz Seydehmet; Guang-Hui Lv; Abdugheni Abliz. 2019. "Landscape Design as a Tool to Reduce Soil Salinization: The Study Case of Keriya Oasis (NW China)." Sustainability 11, no. 9: 2578.

Journal article
Published: 05 April 2019 in Journal of Hydrology
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Groundwater is the most important water resource in arid regions. However, the groundwater traditional models and field measurements are limited due to the fluctuations in hydrological cycles and the difficulty in the accurate quantification of associated parameters. Here, we hypothesized that maximum potential tree height could be used to predict groundwater depth due to the hydraulic limitation of water transportation. To address this hypothesis, we measured two proxy indicators of maximum potential tree height, i.e., the maxima of heights and volumes, of three common dominant tree species in northwest China to construct classical measurement error (CME) model for predicting groundwater depth in an arid region. Our results showed that the optimal model based on maximum tree height had the best predictive performance of groundwater depth, particularly the tallest plant species. The CME model showed that maximum tree height played a vital role in predicting groundwater depth. Mathematically the model can be expressed as: [Eln(Dw)lnTh,θ)=7.11-1.85ExlnTh,θ), where Dw and Th are respectively the theoretical values of groundwater depth and maximum tree height; x is the measured maximum tree height; θ = {7.11, -1.85, 7.19, 0.15, 1.91, 13.45}; R2=0.82; Marginal log-Likelihood = -131.04; RMSE = 0.33]. In addition, Leave-One-Out Cross-Validation together with correlation analysis indicated that groundwater depth prediction based on maximum tree height in arid regions was an accurate and promising approach. In conclusion, our study showed that the hydraulic limitation of water transportation led to a negative relationship between maximum tree height and groundwater depth. Our developed model for predicting groundwater depth with maximum tree height has provided the important basis for the conservation and management of groundwater resources in arid regions.

ACS Style

Xiao-Dong Yang; Ya-Dong Qie; De-Xiong Teng; Arshad Ali; Yilu Xu; Nanthi Bolan; Wei-Guo Liu; Guang-Hui Lv; Li-Gang Ma; Sheng-Tian Yang; Simayi Zibibula. Prediction of groundwater depth in an arid region based on maximum tree height. Journal of Hydrology 2019, 574, 46 -52.

AMA Style

Xiao-Dong Yang, Ya-Dong Qie, De-Xiong Teng, Arshad Ali, Yilu Xu, Nanthi Bolan, Wei-Guo Liu, Guang-Hui Lv, Li-Gang Ma, Sheng-Tian Yang, Simayi Zibibula. Prediction of groundwater depth in an arid region based on maximum tree height. Journal of Hydrology. 2019; 574 ():46-52.

Chicago/Turabian Style

Xiao-Dong Yang; Ya-Dong Qie; De-Xiong Teng; Arshad Ali; Yilu Xu; Nanthi Bolan; Wei-Guo Liu; Guang-Hui Lv; Li-Gang Ma; Sheng-Tian Yang; Simayi Zibibula. 2019. "Prediction of groundwater depth in an arid region based on maximum tree height." Journal of Hydrology 574, no. : 46-52.

Journal article
Published: 22 February 2019 in CATENA
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The conversion of extreme xeromorphic vegetation (natural desert forest) to agricultural lands is one of the largest land-use changes in the arid desert region of China over the past 30 years, which may substantially influence soil respiration, and hence may largely determine local climate change. However, few studies have considered the change in soil respiration across natural desert forest and agricultural lands in the arid desert region. In this study, soil respiration and its influencing factors, i.e., soil moisture content, soil salinity, microbial quantity, soil temperature, fine-root biomass, soil organic matter (SOM), air temperature, pH and relative air humidity, were determined across natural desert forest and three chronosequential fields where forests have been converted to agricultural lands having varying length of cultivation period (i.e., 5, 10 and 30 years of cultivation) in an arid desert region. We used two-way repeated measure ANOVA for evaluating significant differences in soil respiration and its influencing factors between natural desert forest and agricultural lands, and then employed structural equation model (SEM) with the support of stepwise regressions analyses to test for the direct and indirect effects of influencing factors on soil respiration. The results showed that soil respiration significantly increased along the years of cultivation in agricultural lands (P < 0.05). Soil respiration was higher in all agricultural lands than that in natural desert forest (P < 0.05). Stepwise regressions and SEM showed that soil moisture content and soil salinity had explained 75% of the variation in soil respiration through direct and indirect effects via abiotic and biotic factors. Soil respiration was significantly affected by the sum of the direct and indirect effects of soil salinity (β = −0.46) and soil moisture content (β = 0.49) via microbial quantity, soil temperature, fine-root biomass and SOM. This study suggests that deforestation and subsequent agricultural activities might alter the soil moisture and salinity contents, and as a consequence influence soil respiration across natural desert forest and agricultural lands in an arid desert region.

ACS Style

Xiao-Dong Yang; Arshad Ali; Yi-Lu Xu; La-Mei Jiang; Guang-Hui Lv. Soil moisture and salinity as main drivers of soil respiration across natural xeromorphic vegetation and agricultural lands in an arid desert region. CATENA 2019, 177, 126 -133.

AMA Style

Xiao-Dong Yang, Arshad Ali, Yi-Lu Xu, La-Mei Jiang, Guang-Hui Lv. Soil moisture and salinity as main drivers of soil respiration across natural xeromorphic vegetation and agricultural lands in an arid desert region. CATENA. 2019; 177 ():126-133.

Chicago/Turabian Style

Xiao-Dong Yang; Arshad Ali; Yi-Lu Xu; La-Mei Jiang; Guang-Hui Lv. 2019. "Soil moisture and salinity as main drivers of soil respiration across natural xeromorphic vegetation and agricultural lands in an arid desert region." CATENA 177, no. : 126-133.

Original article
Published: 18 January 2019 in Plant Systematics and Evolution
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Past geological and climatic changes have promoted shifts in both intraspecific differentiation and distribution ranges for many desert plants, though little is known about the effects of these changes specifically on spring ephemerals in Northwest China. In the present study, we aimed to survey the population structure and phylogeographic history of an endemic spring ephemeral species, Ixiolirion songaricum P. Yan in Northwest China. We sequenced the nITS and two ptDNA fragments (psbB–psbH and ycf6–psbM) for 265 individuals from 15 populations across the entire range. Eight nITS ribotypes and eleven plastid chlorotypes were identified, with three of them dominant. A significant phylogeographic structure was detected for the species in which two larger, distinct phylogeographic lineages were identified. A high proportion of the total genetic variation existed between populations and between the two lineages. The species had undergone a sudden range expansion in the late Quaternary, which might have been driven by an interglacial warm, humid climate following the largest Pleistocene glaciation period in Northwest China. The ecological niche modeling suggested the species experienced continuous shrinkage of potential range since the last interglacial, which is distinct from other desert plants. Overall, our results indicated that climate change associated with the Quaternary greatly promoted differentiation of I. songaricum. The shift in population distribution was likely driven by increasing aridity in Xinjiang during the Quaternary.

ACS Style

Yan Li; Xue-Ni Zhang; Guang-Hui Lv. Phylogeography of Ixiolirion songaricum, a spring ephemeral species endemic to Northwest China. Plant Systematics and Evolution 2019, 305, 205 -221.

AMA Style

Yan Li, Xue-Ni Zhang, Guang-Hui Lv. Phylogeography of Ixiolirion songaricum, a spring ephemeral species endemic to Northwest China. Plant Systematics and Evolution. 2019; 305 (3):205-221.

Chicago/Turabian Style

Yan Li; Xue-Ni Zhang; Guang-Hui Lv. 2019. "Phylogeography of Ixiolirion songaricum, a spring ephemeral species endemic to Northwest China." Plant Systematics and Evolution 305, no. 3: 205-221.

Journal article
Published: 30 August 2018 in PeerJ
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BackgroundRecently, researches have begun to investigate the microbial communities associated with halophytes. Both rhizobacterial community composition and the environmental drivers of community assembly have been addressed. However, few studies have explored the structure of rhizobacterial communities associated with halophytic plants that are co-occurring in arid, salinized areas.MethodsFive halophytes were selected for study: these co-occurred in saline soils in the Ebinur Lake Nature Reserve, located at the western margin of the Gurbantunggut Desert of Northwestern China. Halophyte-associated bacterial communities were sampled, and the bacterial 16S rDNA V3–V4 region amplified and sequenced using the Illumina Miseq platform. The bacterial community diversity and structure were compared between the rhizosphere and bulk soils, as well as among the rhizosphere samples. The effects of plant species identity and soil properties on the bacterial communities were also analyzed.ResultsSignificant differences were observed between the rhizosphere and bulk soil bacterial communities. Diversity was higher in the rhizosphere than in the bulk soils. Abundant taxonomic groups (from phylum to genus) in the rhizosphere were much more diverse than in bulk soils. Proteobacteria, Firmicutes, Actinobacteria, Bacteroidetes and Planctomycetes were the most abundant phyla in the rhizosphere, while Proteobacteria and Firmicutes were common in bulk soils. Overall, the bacterial community composition were not significantly differentiated between the bulk soils of the five plants, but community diversity and structure differed significantly in the rhizosphere. The diversity ofHalostachys caspica,Halocnemum strobilaceumandKalidium foliatumassociated bacterial communities was lower than that ofLimonium gmeliniiandLycium ruthenicumcommunities. Furthermore, the composition of the bacterial communities ofHalostachys caspicaandHalocnemum strobilaceumwas very different from those ofLimonium gmeliniiandLycium ruthenicum. The diversity and community structure were influenced by soil EC, pH and nutrient content (TOC, SOM, TON and AP); of these, the effects of EC on bacterial community composition were less important than those of soil nutrients.DiscussionHalophytic plant species played an important role in shaping associated rhizosphere bacterial communities. When salinity levels were constant, soil nutrients emerged as key factors structuring bacterial communities, while EC played only a minor role. Pairwise differences among the rhizobacterial communities associated with different plant species were not significant, despite some evidence of differentiation. Further studies involving more halophyte species, and individuals per species, are necessary to elucidate plant species identity effects on the rhizosphere for co-occurring halophytes.

ACS Style

Yan Li; Yan Kong; Dexiong Teng; Xueni Zhang; Xuemin He; Yang Zhang; Guanghui Lv. Rhizobacterial communities of five co-occurring desert halophytes. PeerJ 2018, 6, e5508 .

AMA Style

Yan Li, Yan Kong, Dexiong Teng, Xueni Zhang, Xuemin He, Yang Zhang, Guanghui Lv. Rhizobacterial communities of five co-occurring desert halophytes. PeerJ. 2018; 6 ():e5508.

Chicago/Turabian Style

Yan Li; Yan Kong; Dexiong Teng; Xueni Zhang; Xuemin He; Yang Zhang; Guanghui Lv. 2018. "Rhizobacterial communities of five co-occurring desert halophytes." PeerJ 6, no. : e5508.

Journal article
Published: 23 July 2018 in Water
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Irrigation salinity is a common environmental threat for sustainable development in the Keriya Oasis, arid Northwest China. It is mainly caused by unreasonable land management and excessive irrigation. The aim of this study was to assess and map the salinity risk distribution by developing a composite risk index (CRI) for seventeen risk parameters from traditional and scientific fields, based on maximizing deviation method and analytic hierarchy process, the grey relational analysis and the Pressure-State-Response (PSR) sustainability framework. The results demonstrated that the northern part of the Shewol and Yeghebagh village has a very high salinity risk, which might be caused by flat and low terrain, high subsoil total soluble salt, high groundwater salinity and shallow groundwater depth. In contrast, the southern part of the Oasis has a low risk of salinity because of high elevation, proper drainage conditions and a suitable groundwater table. This achievement has shown that southern parts of the Oasis are suitable for irrigation agriculture; for the northern area, there is no economically feasible solution but other areas at higher risk can be restored by artificial measures. Therefore, this study provides policy makers with baseline data for restoring the soil salinity within the Oasis.

ACS Style

Jumeniyaz Seydehmet; Guang-Hui Lv; Abdugheni Abliz; Qing-Dong Shi; Abdulla Abliz; Abdusalam Turup. Irrigation Salinity Risk Assessment and Mapping in Arid Oasis, Northwest China. Water 2018, 10, 966 .

AMA Style

Jumeniyaz Seydehmet, Guang-Hui Lv, Abdugheni Abliz, Qing-Dong Shi, Abdulla Abliz, Abdusalam Turup. Irrigation Salinity Risk Assessment and Mapping in Arid Oasis, Northwest China. Water. 2018; 10 (7):966.

Chicago/Turabian Style

Jumeniyaz Seydehmet; Guang-Hui Lv; Abdugheni Abliz; Qing-Dong Shi; Abdulla Abliz; Abdusalam Turup. 2018. "Irrigation Salinity Risk Assessment and Mapping in Arid Oasis, Northwest China." Water 10, no. 7: 966.

Journal article
Published: 11 June 2018 in Sustainability
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Oasis landscape change and its pattern dynamics are considered one of the vital research areas on global land use and landscape change in arid regions. An agricultural oasis is the main site of food security and ecosystem services in arid areas. Recently, the dramatic exploitation of agricultural oases has affected oasis stability, inducing some ecological and environmental issues such as water shortage and land degradation. In this study, the Qira oasis on the southern margin of Tarim Basin, Northwest China, was selected as a study area to examine the spatiotemporal changes in an agricultural oasis and the influence on oasis landscape pattern. Based on the integration of Thematic Mapper, Enhanced Thematic Mapper Plus, and GF-1 images, the agricultural Qira oasis has rapidly increased, with annual change rates of −0.3%, 1.6%, 3.7%, and 1.5% during 1970–1990, 1990–2000, 2000–2013, and 2013–2016, respectively. With the agricultural oasis expansion, the agricultural land has increased from 91.10 km2 in 1970 to 105.04 km2 in 2016. The percentage of farmland area has increased by 15.3% in 2016 compared with that in 1970. The natural vegetation is decreasing owing to the reclamation of desert–oasis ecotone. The oasis landscape change and pattern are mainly affected by agricultural expansion under water-saving technological utilization, land use policy, and regional economic development demand. The expansion of agricultural oasis is alarming due to human overexploitation. Thus, the government should adjust the layout of agricultural development and pay considerable attention to the oasis environment sustainability. This study can provide a valuable reference on the impact of climate change and human activities on a landscape.

ACS Style

Yi Liu; Jie Xue; Dongwei Gui; Jiaqiang Lei; Huaiwei Sun; Guanghui Lv; Zhiwei Zhang. Agricultural Oasis Expansion and Its Impact on Oasis Landscape Patterns in the Southern Margin of Tarim Basin, Northwest China. Sustainability 2018, 10, 1957 .

AMA Style

Yi Liu, Jie Xue, Dongwei Gui, Jiaqiang Lei, Huaiwei Sun, Guanghui Lv, Zhiwei Zhang. Agricultural Oasis Expansion and Its Impact on Oasis Landscape Patterns in the Southern Margin of Tarim Basin, Northwest China. Sustainability. 2018; 10 (6):1957.

Chicago/Turabian Style

Yi Liu; Jie Xue; Dongwei Gui; Jiaqiang Lei; Huaiwei Sun; Guanghui Lv; Zhiwei Zhang. 2018. "Agricultural Oasis Expansion and Its Impact on Oasis Landscape Patterns in the Southern Margin of Tarim Basin, Northwest China." Sustainability 10, no. 6: 1957.

Journal article
Published: 28 February 2018 in Sustainability
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Significant anthropogenic and biophysical changes have caused fluctuations in the soil salinization area of the Keriya Oasis in China. The Driver-Pressure-State-Impact-Response (DPSIR) sustainability framework and Bayesian networks (BNs) were used to integrate information from anthropogenic and natural systems to model the trend of secondary soil salinization. The developed model predicted that light salinization (vegetation coverage of around 15–20%, soil salt 5–10 g/kg) of the ecotone will increase in the near term but decelerate slightly in the future, and that farmland salinization will decrease in the near term. This trend is expected to accelerate in the future. Both trends are attributed to decreased water logging, increased groundwater exploitation, and decreased ratio of evaporation/precipitation. In contrast, severe salinization (vegetation coverage of around 2%, soil salt ≥20 g/kg) of the ecotone will increase in the near term. This trend will accelerate in the future because decreased river flow will reduce the flushing of severely salinized soil crust. Anthropogenic factors have negative impacts and natural causes have positive impacts on light salinization of ecotones. In situations involving severe farmland salinization, anthropogenic factors have persistent negative impacts.

ACS Style

Jumeniyaz Seydehmet; Guang Lv; İlyas Nurmemet; Tayierjiang Aishan; Abdulla Abliz; Mamat Sawut; Abdugheni Abliz; Mamattursun Eziz. Model Prediction of Secondary Soil Salinization in the Keriya Oasis, Northwest China. Sustainability 2018, 10, 656 .

AMA Style

Jumeniyaz Seydehmet, Guang Lv, İlyas Nurmemet, Tayierjiang Aishan, Abdulla Abliz, Mamat Sawut, Abdugheni Abliz, Mamattursun Eziz. Model Prediction of Secondary Soil Salinization in the Keriya Oasis, Northwest China. Sustainability. 2018; 10 (3):656.

Chicago/Turabian Style

Jumeniyaz Seydehmet; Guang Lv; İlyas Nurmemet; Tayierjiang Aishan; Abdulla Abliz; Mamat Sawut; Abdugheni Abliz; Mamattursun Eziz. 2018. "Model Prediction of Secondary Soil Salinization in the Keriya Oasis, Northwest China." Sustainability 10, no. 3: 656.