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The phytolith carbon sequestration in terrestrial ecosystems: the underestimated potential of bamboo forest

Ecological Processes 2023年第4期12卷 230-241页

作者： Xuekun Cheng Huiru Lv Shuhan liu Chong li pingheng li Yufeng Zhou Yongjun Shi Guomo Zhou State Key Laboratory of Subtropical Silviculture Zhejiang A&F University Zhejiang Province Key Think Tank: Institute of Ecological Civilization Zhejiang A&F University Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration of Zhejiang Province Zhejiang A&F University School of Environmental and Resources Science Zhejiang A&F University

Background Terrestrial ecosystems contain significant carbon storage, vital to the global carbon cycle and climate change. Alterations in human production activities and environmental factors affect the stability of carbon storage in soil. Carbon sequestration in plant phytoliths offers a sustainable method for long-term carbon stabilization. Carbon occluded in phytoliths(Phyt OC) is a kind of carbon that can be stable and not decomposed for a long time, so it is crucial to conduct more in-depth research on *** We undertook a meta-analysis on Phyt OC across global terrestrial ecosystems, analyzing 60 articles, encapsulating 534 observations. We observed notable differences in phytolith and Phyt OC contents across various ecosystems. Bamboo forest ecosystems exhibited the highest vegetation phytolith and Phyt OC content, while soil phytolith content was most prominent in bamboo forests and Phyt OC content in croplands. Human activities, such as grassland grazing, had a lesser impact on soil Phyt OC transport than actions like cutting and tillage in croplands and forests. Our study separated bamboo ecosystems, analyzing their Phyt OC content and revealing an underestimation of their carbon sink *** Notwithstanding our findings, phytoliths' intricate environmental interactions warrant further exploration, crucial for refining ecosystem management and accurately estimating Phyt OC stocks. This deepened understanding lays the foundation for studying phytoliths and the carbon sink dynamics.

关键词： Carbon sequestration Phytoliths PhytOC Terrestrial ecosystem Soil carbon

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Soil erosion assessment by RUSLE model using remote sensing and GIS in an arid zone

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International Journal of Digital Earth 2023年第1期16卷 3105-3124页

作者： pingheng li Aqil Tariq Qingting li Bushra Ghaffar Muhammad Farhan Ahsan Jamil Walid Soufan Ayman El Sabagh Mohamed Freeshah Business School Huanggang Normal UniversityHuanggangPeople’s Republic of China Department of Wildlife Fisheries and AquacultureMississippi State UniversityMississippi StateMSUSA State Key Laboratory of Information Engineering in Surveying Mapping and Remote SensingWuhan UniversityWuhanPeople’s Republic of China Airborne Remote Sensing Center Aerospace Information Research InstituteChinese Academy of SciencesBeijingPeople’s Republic of China Department of Environmental Science Faculty of SciencesInternational Islamic UniversityIslamabadPakistan School of Earth Sciences and Engineering Hohai UniversityNanjingPeople’s Republic of China Department of Plant and Environmental Sciences New Mexico State UniversityLas CrucesNMUSA Plant Production Department College of Food and Agriculture SciencesKing Saud UniversityRiyadhSaudi Arabia Department of Agronomy Faculty of AgricultureKafrelsheikh UniversityKafrelsheikhEgypt Geomatics Engineering Department Benha UniversityBanh1Egypt School of Geodesy and Geomatics Wuhan UniversityWuhanPeople’s Republic of China

In this research,we used the Revised Universal Soil Loss Equation(RUSLE)and Geographical Information System(GIS)to predict the annual rate of soil loss in the District Chakwal of *** parameters of the RUSLE model were estimated using remote sensing data,and the erosion probability zones were determined using *** estimated length slope(LS),crop management(C),rainfall erosivity(R),soil erodibility(K),and support practice(P)range from 0-68,227,0-66.61%,0-0.58,495.99-648.68 MJ/***^(-1).year^(-1),0.15-0.25 MJ/***^(-1).year^(-1),and 1 *** results indicate that the estimated total annual potential soi loss of approximately 4,67,064.25 ***^(-1).year^(-1) is comparable with the measured'sediment ioss of 11,631 ***^(-1).year^(-1) during the water year *** predicted soil erosion rate due to an increase in agricultural area is approximately 164,249.31 ***^(-1).year^(-1).In this study,we also used,Landsat imagery to rapidly achieve actual land use ***,38.i3%of the region was threatened by very high soil erosion,where the quantity of soil erosion ranged from 365487.35 ***^(-1).year^(-1),Integrating GIS and remote sensing with the RUSLE model helped researchers achieve their final ***-use planners and decision-makers use the result's spatial distribution of soil erosion in District Chakwal for conservation and management planning.

关键词： RUSLE Landsat land management DEM soil erosion

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The phytolith carbon sequestration in terrestrial ecosystems: the underestimated potential of bamboo forest

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Ecological Processes 2023年 872-883页

Background Terrestrial ecosystems contain significant carbon storage, vital to the global carbon cycle and climate change. Alterations in human production activities and environmental factors affect the stability of carbon storage in soil. Carbon sequestration in plant phytoliths offers a sustainable method for long-term carbon stabilization. Carbon occluded in phytoliths(PhytOC) is a kind of carbon that can be stable and not decomposed for a long time, so it is crucial to conduct more in-depth research on *** We undertook a meta-analysis on PhytOC across global terrestrial ecosystems, analyzing 60 articles, encapsulating 534 observations. We observed notable differences in phytolith and PhytOC contents across various ecosystems. Bamboo forest ecosystems exhibited the highest vegetation phytolith and PhytOC content, while soil phytolith content was most prominent in bamboo forests and PhytOC content in croplands. Human activities, such as grassland grazing, had a lesser impact on soil PhytOC transport than actions like cutting and tillage in croplands and *** study separated bamboo ecosystems, analyzing their PhytOC content and revealing an underestimation of their carbon sink *** Notwithstanding our findings, phytoliths' intricate environmental interactions warrant further exploration, crucial for refining ecosystem management and accurately estimating PhytOC stocks. This deepened understanding lays the foundation for studying phytoliths and the carbon sink dynamics.

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Retrieval of leaf biochemical properties by inversed PROSPECT model and hyperspectral indices:an application to Populus euphratica polymorphic leaves

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Journal of Arid Land 2012年第1期4卷 52-62页

作者： ZhongGuo MA Xi CHEN Quan WANG pingheng li Guli Jiapaer Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Urumqi 830011 China Faculty of Agriculture Shizuoka University Shizuoka 422-8529 Japan

Leaf biochemical properties have been widely assessed using hyperspectral reflectance information by inversion of PROSPECT model or by using hyperspectral indices, but few studies have focused on arid ecosystems. As a dominant species of riparian ecosystems in arid lands, Populus euphratica Oliv. is an unusual tree species with polymorphic leaves along the vertical profile of canopy corresponding to different growth stages. In this study, we evaluated both the inversed PROSPECT model and hyperspectral indices for estimating biochemical properties of P. euphratica leaves. Both the shapes and biochemical properties of P. euphratica leaves were found to change with the heights from ground surface. The results indicated that the model inversion calibrated for each leaf shape performed much better than the model calibrated for all leaf shapes, and also better than hyperspectral indices. Similar results were obtained for estimations of equivalent water thickness （EWT） and leaf mass per area （LMA）. Hyperspectral indices identified in this study for estimating these leaf properties had root mean square error （RMSE） and R2 values between those obtained with the two calibration strategies using the inversed PROSPECT model. Hence, the inversed PROSPECT model can be applied to estimate leaf biochemical properties in arid ecosystems, but the calibration to the model requires special attention.

关键词： Populus euphratica inversed model hyperspectral index vertical profile polymorphic leaf

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Estimation of rock Fe content based on hyperspectral indices

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Journal of Arid Land 2021年第12期13卷 1287-1298页

作者： WANG Jinlin WANG Wei CHENG Yinyi ZHANG Zhixin WANG Shanshan ZHOU Kefa li pingheng State Key Laboratory of Desert and Oasis Ecology Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China Xinjiang Key Laboratory of Mineral Resources and Digital Geology Urumqi 830011China Xinjiang Research Centre for Mineral Resources Chinese Academy of SciencesUrumqi 830011China University of Chinese Academy of Sciences Beijing 100049China Zhejiang A&F University Hangzhou 311300China

Information on the Fe content of bare rocks is needed for implementing geochemical processes and identifying ***,the influence of Fe content on the spectra of bare rocks has not been thoroughly analyzed in previous *** Saur Mountain region within the Hoboksar of the Russell Hill depression was selected as the study ***,we analyzed six hyperspectral indices related to rock Fe content based on laboratory measurements(Dataset I)and field measurements(Dataset II).In situ field measurements were acquired to verify the laboratory *** content of the rock samples collected from different fresh and weathered rock surfaces were divided into six levels to reveal the spatial distributions of Fe content of these *** addition,we clearly displayed wavelengths with obvious characteristics by analyzing the spectra of these *** results of this work indicated that Fe content estimation models based on the fresh rock surface measurements in the laboratory can be applied to in situ field or satellite-based measurements of Fe content of the weathered rock *** is not the best way to use only the single wavelengths reflectance at all absorption wavelengths or the depth of these absorption features to estimate Fe *** on sample data analysis,the comparison with other indices revealed that the performance of the modified normalized difference index is the best indicator for estimating rock Fe content,with R2 values of 0.45 and 0.40 corresponding to datasets I and II,***,the modified normalized difference index(the wavelengths of 2220,2290,and 2370 nm)identified in this study could contribute considerably to improve the identification accuracy of rock Fe content in the bare rock *** method proposed in this study can obviously provide an efficient solution for large-scale rock Fe content measurements in the field.

关键词： bare rocks Fe content reflectance spectral indices modified normalized difference index Saur Mountain

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Diurnal and seasonal variations in carbon fluxes in bamboo forests during the growing season in Zhejiang province, China

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Journal of Forestry Research 2019年第2期30卷 657-668页

作者： liang Chen Yuli liu Guomo Zhou Fangjie Mao Huaqiang Du Xiaojun Xu pingheng li Xuejian li State Key Laboratory of Subtropical Silviculture Zhejiang A & F University Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration of Zhejiang Province Zhejiang A & F University School of Environmental and Resources Science Zhejiang A & F University

Bamboo forest is an important forest type in subtropical China and is characterized by fast growth and high carbon sequestration capacity. However, the dynamics of carbon fluxes during the fast growing period of bamboo shoots and their correlation with environment factors are poorly understood. We measured carbon dioxide exchange and climate variables using open-path eddy covariance methods during the 2011 growing season in a Moso bamboo forest(MB, Phyllostchys edulis) and a Lei bamboo forest(LB, Phyllostachys violascens) in Zhejiang province,China. The bamboo forests were carbon sinks during the growing season. The minimum diurnal net ecosystem exchange(NEE) at MB and LB sites were-0.64 and-0.66 mg C m^(-2) s^(-1), respectively. The minimum monthly NEE, ecosystem respiration(RE), and gross ecosystem exchange(GEE) were-99.3 ± 4.03, 76.2 ±2.46, and^(-1)91.5 ± 4.98 g C m^(-2) month^(-1), respectively,at MB site, compared with-31.8 ± 3.44, 70.4 ± 1.41,and^(-1)57.9 ± 4.86 g C m^(-2) month^(-1), respectively, at LB site. Maximum RE was 92.1 ± 1.32 g C m^(-2) month^(-1) at MB site and 151.0 ± 2.38 g C m^(-2) month^(-1) at LB *** control factors varied by month during the growing season, but across the whole growing season, NEE and GEE at both sites showed similar trends in sensitivities to photosynthetic active radiation and vapor pressure deficit,and air temperature had the strongest correlation with RE at both sites. Carbon fluxes at LB site were more sensitive to soil water content compared to those at MB site. Both onyear(years when many new shoots are produced) and offyear(years when none or few new shoots are produced)should be studied in bamboo forests to better understand their role in global carbon cycling.

关键词： Bamboo forest Eddy covariance Carbon fluxes Carbon sequestration

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Ecological Risks of Agricultural Land Capitalization and Their Prevention

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Journal of Landscape Research 2017年第6期9卷 53-57,60页

作者： li pingheng YAN lidong ZHU Xiaorong PAN Shilei School of Business Administration Zhongnan University of Economics and Law Business School Wuhan Institute of Design and Sciences

The capitalization of agricultural land as an institutional innovation in land use is of great significance to revitalize China's land resources, change land use and improve land use efficiency. With the gradual implementation of the capitalization of agricultural land, however, environmental problems brought by capitalization have restricted the sustainable and efficient utilization of agricultural land. This study, from the perspective of ecology, discusses ecological risks of agricultural land capitalization, analyzes the ecological risks of agricultural land capitalization in terms of the amount of land and land quality as well as the formation mechanism of the ecological risks of agricultural land capitalization. It is found that the logic of the capital itself, the profitability of the subject and the fragility of the ecological environment are the internal and external factors of the ecological risks of agricultural land. Thereupon authors put forward policy suggestions to prevent the ecological risks of agricultural land capitalization in terms of large-scale agricultural operations in diverse forms, the development of green agriculture, the protection of agricultural land quality and green finance, with a view to resolving the ecological risks of agricultural land capitalization and realizing the benign operation of agricultural land capitalization.

关键词： Agricultural land Capitalization Ecological risks Risk prevention

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Measurement and Promotion Strategy of Poverty Alleviation Effect through Ecological Tourism in Huanggang City

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Meteorological and Environmental Research 2019年第6期10卷 45-49,53页

作者： li pingheng Ke Chenglong Cai Zhenyu Fang Ping Business School Huanggang Normal University

Huangang City is rich in ecotourism resources,in which more than 80%of ecotourism resources concentrate in poor *** to the statistics,there are 4 tourism counties,15 famous tourism villages and 115 rural tourist *** economic development in ecotourism scenic spots of Huanggang City is relatively backward,and the development of ecological economy is imminent,especially ecological *** on research results on poverty alleviation effect through ecological tourism at home and abroad,Huanggang City is taken as research object,and two input indexes(per capita comprehensive tourism income and per capita tourist reception)and three output indexes(per capita GDP,per capita net income of farmers,and per capita disposable income of urban residents)are used to establish evaluation index system of poverty alleviation effect through ecological *** on DEA-BCC model,11 counties(cities and districts)in Huanggang City are taken as decision-making units,and empirical analysis on poverty alleviation effect through tourism is conducted from three aspects:comprehensive efficiency,technical efficiency and scale efficiency.

关键词： Ecological tourism Poverty alleviation through tourism DEA Poverty alleviation effect

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Agricultural Ecological Capital: Factor Structure,Value Assessment and Accumulation Mechanism

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Meteorological and Environmental Research 2017年第6期8卷 1-5,14页

作者： li pingheng Yan lidong Zhu Xiaorong Deng Yuanjian School of Business Administration Zhongnan University of Economics and Law Business School Wuhan Institute of Design and Sciences

As a kind of important new capital form,agricultural ecological capital plays a decisive role in guaranteeing healthy development of agricultural ecological economy. Therefore scientific understanding agricultural ecological capital is favorable for developing agricultural ecological economy,while clarifying factor structure,value assessment and accumulation mechanism of agricultural ecological capital is important content of understanding agricultural ecological capital. In this paper,factor structure of agricultural ecological capital is firstly elaborated,and it is thought that agricultural ecological capital is the unity of agricultural ecological environment,agricultural ecological resource and agricultural ecological system. Then agricultural ecological capital value is assessed according to use value method and non use value method,thereby realizing quantification of agricultural ecological capital. After agricultural ecological capital passes through value assessment,the value is more clear,which creates condition for agricultural ecological capital accumulation. Finally accumulation mechanism of agricultural ecological capital is analyzed. Accumulation channel of agricultural ecological capital is explored from natural and human factors,and it is found that agricultural ecological capital accumulates in the forms of agricultural ecological restoration and agricultural ecological compensation.

关键词： Agricultural ecological capital Factor Value Accumulation

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自然资源资本化价值诠释——基于自然资源经济学文献的思考

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干旱区资源与环境 2018年第10期32卷 1-9页

作者：严立冬李平衡邓远建屈志光中南财经政法大学工商管理学院武汉430073 中南财经政法大学信息与安全工程学院武汉430073

研究自然资源资本化,需要从价值形态上对自然资源有深入的认识。只有科学地认识自然资源资本化价值,才能把握其价值的完整性,准确地计量各类价值,促使自然资源从实物价值形态向货币价值形态转化,实现价值的最大化增值。基于此,文中通过... 详细信息

研究自然资源资本化,需要从价值形态上对自然资源有深入的认识。只有科学地认识自然资源资本化价值,才能把握其价值的完整性,准确地计量各类价值,促使自然资源从实物价值形态向货币价值形态转化,实现价值的最大化增值。基于此,文中通过对历年自然资源经济学文献的分析与总结,首先阐明了自然资源资本化的存在价值、劳动价值、稀缺价值与生态补偿价值;然后,依据修正后的李金昌模型,对自然资源资本化的各类价值进行了分类演化核算,得出了自然资源资本化价值核算的具体公式;最后,结合我国自然资源制度与实情,从产权界定、生态技术支撑、市场建设与政策支持四个维度提出了自然资源资本化价值实现的条件,期望从价值认识上转变资源开发模式,进而最终实现自然资源保值增值。

关键词：自然资源资本化价值构成价值计量价值实现

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