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Nebkhas play important roles in desertification control and biodiversity protection in arid and semi-arid regions of China

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Ecosystem Health and Sustainability 2020年第1期6卷 503-509,502页

作者： weicheng luo Wenzhi Zhao Bing Liu Hai Zhou Linze Inland River Basin Research Station Chinese Ecosystem Research NetworkKey Laboratory of Ecohydrology of Inland River BasinNorthwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhouChina

Nebkhas are isolated mounds vegetated with burial-tolerant desert plants that trap windborne sediment within their *** are critical to desertification control and biodiversity protection of oases in arid and semi-arid regions of China,as they(ⅰ)trap windborne sediments and ensure oasis security;(ⅱ)as“fertile islands,”nebkhas can trap and provide a suitable micro-environment for seeds,birds,and small soil animals,and increase biodiversity;(ⅲ)increase the soil surface roughness and significantly reduce soil erosion following heavy ***,the establishment of sand-fixing vegetation and over-grazing significantly limits the development and accelerate the degradation of nebkhas,threatening oasis *** provide background and recommendations for protective measures for nebkha landscapes in arid and semi-arid areas of China to aid managers in oasis protection.

关键词： Nebkha desertification control biodiversity protection human activities arid and semi-arid regions

Soil seed bank is affected by transferred soil thickness and properties in the reclaimed coal mine in the Qilian Mountains, China

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Journal of Arid Land 2023年第12期15卷 1529-1543页

作者： YANG Jingyi luo weicheng ZHAO Wenzhi LIU Jiliang WANG Dejin LI Guang College of Forestry Gansu Agricultural UniversityLanzhou 730070China Linze Inland River Basin Research Station Chinese Ecosystem Research NetworkKey Laboratory of Ecohydrology of Inland River BasinNorthwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China Faculty of Modern Agricultural Engineering Kunming University of Science and TechnologyKunming 650500China

Reclamation of lands abandoned after mining in mountain areas is critical to erosion control,safety from landslides,and ecological protection of mountain ***,little is known about alpine coal mine reclamation using the soil seed bank as a potential source for *** collected samples of persistent soil seed bank for germination experiments from nine reclaimed sites with different soil cover thicknesses and from six control sites in the Qilian Mountains of *** properties of each site were determined(including soil water content,soil available potassium,soil available phosphorus,soil total nitrogen,pH,soil organic matter,soil total phosphorus,and soil total potassium,and soil alkali-hydrolyzable nitrogen),and the relationships of the characteristics of the soil seed bank with soil cover thickness and soil properties were *** results showed that the density,number of species,and diversity of the topsoil seed bank were significantly correlated with soil cover thickness,and all increased with the increment of soil cover *** cover thickness controlled the soil seed bank by influencing soil *** the increase in soil cover thickness,soil properties(e.g.,soil organic matter,soil total nitrogen,etc.)content increased while soil pH *** soil seed bank had the potential to restored the pre-mining habitat at reclaimed sites with approximately 20-cm soil cover *** properties of reclaimed sites were lower than that of natural *** relationship between the soil seed bank and soil cover thickness determined in this study provides a foundation for improving reclamation measures used in coal mines,as well as for the management and monitoring of reclaimed areas.

关键词： soil seed bank soil cover thickness species composition soil properties Qilian Mountains

Changes in morphology and soil nutrient patterns of nebkhas in arid regions along a precipitation gradient

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Research in Cold and Arid Regions 2021年第3期13卷 256-267页

作者： weicheng luo WenZhi Zhao Bing Liu Heng Ren Linze Inland River Basin Research Station Chinese Ecosystem Research NetworkKey Laboratory of Ecohydrology of Inland River BasinNorthwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhouGansu 730000China

Nebkhas, discrete mounds of sand and vegetation, are a common landscape feature critical to the stability of desert ecosystems and supported by limited precipitation. Nebkha morphology and spatial pattern vary in landscapes, but it is unclear how they change along precipitation gradients in arid and semi-arid regions. In this study we determined morphology and soil nutrient patterns of nebkha from different regions of northwestern China. The objective of this study was to understand zonal differences among nebkhas and how morphological characteristics and soil nutrient patterns of nebkha change along a precipitation gradient in northwestern China. Our results shows that mean annual precipitation(MAP) had significant effects on morphological characteristics of nebkhas such as height, area, and volume which significantly decreased with an increase in MAP. MAP had significant positive effects on shrub cover and species richness of nebkha. Soil nutrients such as soil organic matter(SOM), total carbon(TC), total nitrogen(TN), and total phosphorus(TP) in the 0-10 cm layer increased with an increase of MAP, and soil nutrient content within nebkhas was higher than in inter-nebkha *** concluded that nebkhas are "fertile islands" with an important role in ecosystem dynamics in study regions. Further,MAP is a key factor which determined zonal differences, morphological, and soil nutrients patterns of nebkhas. However,disturbance, such as animal grazing, and planted sand-stabilizing vegetation accelerated the degeneration of nebkha landscapes. We recommend implementation of protective measures for nebkhas in arid and semi-arid areas of China.

关键词： Nebkha morphology soil nutrient precipitation gradient arid and semi-arid lands

Responses of root growth of Alhagi sparsifolia Shap. (Fabaceae) to different simulated groundwater depths in the southern fringe of the Taklimakan Desert, China

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Journal of Arid Land 2013年第2期5卷 220-232页

作者： FanJiang ZENG Cong SONG HaiFeng GUO Bo LIU weicheng luo DongWei GUI Stefan ARNDT DaLi GUO State Key Laboratory of Desert and Oasis Ecology Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Cele National Station of Observation and Research for Desert-Grassland Ecosystem University of Chinese Academy of Sciences School of Forest and Ecosystem Science University of Melbourne Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences

Alhagi sparsifolia Shap. （Fabaceae） is a spiny, perennial herb. The species grows in the salinized, arid regions in North China. This study investigated the response characteristics of the root growth and the dis- tribution of one-year-old A. sparsifolia seedlings to different groundwater depths in controlled plots. The eco- logical adaptability of the root systems of A. sparsifolia seedlings was examined using the artificial digging method. Results showed that：（1） A. sparsifolia seedlings adapted to an increase in groundwater depth mainly through increasing the penetration depth and growth rate of vertical roots. The vertical roots grew rapidly when soil moisture content reached 3%-9%, but slowly when soil moisture content was 13%-20%. The vertical roots stopped growing when soil moisture content reached 30% （the critical soil moisture point）. （2） The morphological plasticity of roots is an important strategy used by A. sparsifolia seedlings to obtain water and adapt to dry soil conditions. When the groundwater table was shallow, horizontal roots quickly expanded and tillering increased in order to compete for light resources, whereas when the groundwater table was deeper, vertical roots developed quickly to exploit space in the deeper soil layers. （3） The decrease in groundwater depth was probably respon- sible for the root distribution in the shallow soil layers. Root biomass and surface area both decreased with soil depth. One strategy of A. sparsifolia seedlings in dealing with the increase in groundwater depth is to increase root biomass in the deep soil layers. The relationship between the root growth/distribution of A. sparsifolia and the depth of groundwater table can be used as guidance for harvesting A. sparsifolia biomass and managing water resources for forage grasses. It is also of ecological significance as it reveals how desert plants adapt to arid environments.

关键词： Alhagi sparsifolia Shap. simulated groundwater depth root system growth and distribution ecological adaptability root morphological plasticity

Tea domain transcription factor TEAD4 mitigatesTGF-β signaling and hepatocellular carcinomaprogression independently of YAP

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Journal of Molecular Cell Biology 2023年第2期15卷 3-16页

作者： weicheng luo Yi Li Yi Zeng Yining Li Minzhang Cheng Cheng Zhang Fei Li Yiqing Wu Chunhong Huang Xiaolong Yang Joachim Kremerskothen Jianmin Zhang Chunbo Zhang Shuo Tu Zhihua Li Zhĳun luo Zhenghong Lin Xiaohua Yan Department of Biochemistry and Molecular Biology School of Basic Medical SciencesNanchang University Jiangxi Medical CollegeNanchang 330031China Department of Rheumatology and Clinical Immunology Jiangxi Provincial People’s HospitalThe First Affiliated Hospital of Nanchang Medical CollegeNanchang 330006China Center for Experimental Medicine The First Affiliated Hospital of Nanchang UniversityNanchang 330006China Department of Pathology and Molecular Medicine Queen’s UniversityKingstonON K7L 3N6Canada Department of Nephrology Hypertension and RheumatologyUniversity Hospital MünsterMünster 48149Germany Department of Cancer Genetics&Genomics Roswell Park Comprehensive Cancer CenterElm and Carlton StreetsBuffaloNY 14203USA School of Pharmacy Nanchang University Jiangxi Medical CollegeNanchang 330008China Key Laboratory of Breast Diseases of Jiangxi Province Nanchang People’s HospitalNanchang 330025China Department of Pathology School of Basic Medical SciencesNanchang University Jiangxi Medical CollegeNanchang 330006China School of Life Sciences Chongqing UniversityChongqing 405200China

Tea domain transcription factor 4 (TEAD4) plays a pivotal role in tissue development and homeostasis by interacting with Yesassociated protein (YAP) in response to Hippo signaling inactivation. TEAD4 and YAP can also cooperate with transforminggrowth factor-β (TGF-β)-activated Smad proteins to regulate gene transcription. Yet, it remains unclear whether TEAD4 playsa YAP-independent role in TGF-β signaling. Here, we unveil a novel tumor suppressive function of TEAD4 in liver cancer viamitigating TGF-β signaling. Ectopic TEAD4 inhibited TGF-β-induced signal transduction, Smad transcriptional activity, and targetgene transcription, consequently suppressing hepatocellular carcinoma cell proliferation and migration in vitro and xenografttumorgrowth in mice. Consistently, depletion of endogenous TEAD4 by siRNAs enhanced TGF-β signaling in cancer cells. Mechanistically,TEAD4 associates with receptor-regulated Smads (Smad2/3) and Smad4 in the nucleus, thereby impairing the binding of Smad2/3to the histone acetyltransferase p300. Intriguingly, these negative effects of TEAD4 on TGF-β/Smad signaling are independent ofYAP, as impairing the TEAD4–YAP interaction through point mutagenesis or depletion of YAP and/or its paralog TAZ has little ***, these results unravel a novel function of TEAD4 in fine tuning TGF-β signaling and liver cancer progression in a YAPindependent manner.

关键词： TGF-β TEAD4 p300 signaling regulation transcriptional activity hepatocellular carcinoma

Pulse Self-trapping Robustness to Polarization Mode Dispersion in Optical Fiber

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Chinese Journal of Lasers 2002年第2期11卷 71-75页

作者： CHEN weicheng XU Wencheng luo Aiping CUI HuCHEN Yongzhu LIU Songhao(Intitute of Quantum Electronics, South China Normal University, Guangzhou 510631, China) Quantum Electronics South China Normal University Guangzhou 510631

In this paper, pulse self-trapping robustness to polarization mode dispersion in optical fibers is studied. Nonlinear pulse can be used to suppress PMD despite the input pulse shapes is found. When the nonlinear effect is stronger (initial pulse amplitude is larger), the suppression degree to PMD is better. As the initial chirp is considered, we find that the chirp is harmful to suppress PMD. The more is initial chirp, the more is the PMD value.

关键词： optical fiber communication polarization mode dispersion soliton self-trapping birefringent fiber

Exploring practical methods for detecting k-nonseparability in multipartite quantum states

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 255-256页

作者： Shunlong luo Academy of Mathematics and Systems Science Chinese Academy of Sciences

Quantum entanglement, referred to as “spooky action at a distance” by Einstein, is not only an intriguing and fascinating feature of quantum theory challenging our classical intuitions about locality and correlations, but also has practical and profound implications for quantum technologies. Initially described by Einstein, Podolsky and Rosen, as well as by Schro¨dinger, entanglement now has become a basic and crucial ingredient for both foundational and experimental investigations of the quantum world.

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荒漠草原带沙源及灌丛对灌丛沙堆形态的影响

中国沙漠 2015年第3期35卷 573-581页

作者：谢国勋罗维成赵文智盐池县环境保护和林业局宁夏盐池751500 中国科学院寒区旱区环境与工程研究所中国生态系统研究网络临泽内陆河流域研究站/中国科学院内陆河流域生态水文重点实验室甘肃兰州730000 中国科学院大学北京100049

灌丛沙堆是干旱区一种典型的景观类型,经常出现在靠近流沙地带。在地处荒漠草原带的宁夏盐池北部的流沙边缘就发育有典型的白刺(Nitraria tangutorum)灌丛沙堆。本文对不同沙源距离和灌丛生长状况下的白刺灌丛沙堆形态特征进行了研究。... 详细信息

灌丛沙堆是干旱区一种典型的景观类型,经常出现在靠近流沙地带。在地处荒漠草原带的宁夏盐池北部的流沙边缘就发育有典型的白刺(Nitraria tangutorum)灌丛沙堆。本文对不同沙源距离和灌丛生长状况下的白刺灌丛沙堆形态特征进行了研究。结果表明:荒漠草原带白刺灌丛沙堆的高度0.2~4.8m,90.05%的高度小于3.0m;体积0.11~805.17m3,6.08%的体积小于150m3;面积0.86~333.3m2,72.26%的小于50m2。灌丛沙堆长轴长和短轴长、高度和面积、高度和体积、面积和体积间都存在很好的幂函数关系,随着灌丛沙堆高度的增加,其面积和体积也增加。沙源对白刺灌丛沙堆的分布特征有显著影响,灌丛沙堆的高度、面积和体积和沙源距离都有很好的抛物线形关系。白刺灌丛的生长状况对灌丛沙堆的形态特征也有明显的影响,即白刺灌丛生长状况越好,灌丛沙堆的高度、面积和体积也增大。

关键词：白刺(Nitraria tangutorum) 灌丛沙堆形态特征沙源距离灌丛

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不同气候区灌丛沙堆形态及土壤养分积累特征

中国沙漠 2021年第2期41卷 191-199页

作者：罗维成赵文智任珩刘冰中国科学院西北生态环境资源研究院中国科学院临泽内陆河流域研究站/中国科学院内陆河流域生态水文重点实验室甘肃兰州730000

灌丛沙堆是干旱、半干旱区绿洲边缘常见景观类型,在绿洲风沙防护及生物多样性保护方面有重要意义。本文对中国西北干旱区不同气候区常见的柽柳(Tamarix chinensis)、泡泡刺(Nitraria sphaerocarpa)和柠条锦鸡儿(Caragana korshinskii)... 详细信息

灌丛沙堆是干旱、半干旱区绿洲边缘常见景观类型,在绿洲风沙防护及生物多样性保护方面有重要意义。本文对中国西北干旱区不同气候区常见的柽柳(Tamarix chinensis)、泡泡刺(Nitraria sphaerocarpa)和柠条锦鸡儿(Caragana korshinskii)灌丛沙堆形态和养分积累特征进行了对比研究。结果表明:柽柳灌丛沙堆高度、面积和体积显著高于泡泡刺和柠条锦鸡儿灌丛沙堆,泡泡刺灌丛沙堆高度、面积和体积最小。3种灌丛的存在都显著增加了沙堆土壤有机质含量,使灌丛沙堆成为"肥岛",其中柽柳灌丛沙堆"肥岛"效应最明显。柽柳灌丛沙堆土壤有机质、全碳、全氮和凋落物含量显著高于泡泡刺和柠条锦鸡儿灌丛沙堆。主要原因是柽柳枝条茂密,拦截面积大且凋落物量大,因此沙物质拦截和养分积累能力强于其他两种灌丛。另外,不同气候区沙源和气象条件的差异也可能导致灌丛沙堆形态及养分累积特征不同。

关键词：灌丛沙堆灌丛特性形态特征养分积累