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Topography and soil content contribute to plant community composition and structure in subtropical evergreen-deciduous broadleaved mixed forests

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plant Diversity 2021年第4期43卷 264-274页

作者： Qichi Yang Hehe Zhang Lihui Wang Feng Ling Zhengxiang Wang Tingting Li Jinliang Huang Key Laboratory for Environment and Disaster Monitoring and Evaluation HubeiInnovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan430077China University of Chinese Academy of Sciences Beijing100049China School of Resource and Environment Hubei UniversityWuhan430062China

Topography and soil factors are known to play crucial roles in the species composition of plant communities in subtropical evergreen-deciduous broadleaved mixed *** this study,we used a systematic quantitative approach to classify plant community types in the subtropical forests of Hubei Province(central China),and then quantified the relative contribution of drivers responsible for variation in species composition and *** classified the subtropical forests in the study area into 12 community *** these,species diversity indices of three communities were significantly higher than those of *** each community type,species richness,abundance,basal area and importance values of evergreen and deciduous species were *** most community types,deciduous species richness was higher than that of evergreen *** regression analysis showed that the dominant factors that affect species composition in each community type are elevation,slope,aspect,soil nitrogen content,and soil phosphorus ***,structural equation modeling analysis showed that the majority of variance in species composition of plant communities can be explained by elevation,aspect,soil water content,litterfall,total nitrogen,and total ***,the major factors that affect evergreen and deciduous species distribution across the 12 community types in subtropical evergreendeciduous broadleaved mixed forests include elevation,slope and aspect,soil total nitrogen content,soil total phosphorus content,soil available nitrogen content and soil available phosphorus content.

关键词： Environmental factors plant community Two-way indicator species analysis Detrended correspondence analysis Evergreen-deciduous broadleaved mixed forests Northwestern of Hubei

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Positive Interactions： Crucial Organizers in a plant community

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Journal of Integrative plant Biology 2006年第2期48卷 128-136页

作者： Dong-Liang Cheng Gen-Xuan Wang Bao-Ming Chen Xiao-Ping Wei Key Laboratory of Arid and Grassland Agroecology at Lanzhou University Ministry of Education Lanzhou 730000 China College of Life Sciences Zhejiang University Hangzhou 310027 China

For more than a century, ecologists have concentrated on competition as a crucial process for community organization. However, more recent experimental investigations have uncovered the striking Influence of positive Interactions on the organization of plant communities. Complex combinations of competition and positive interactions operating simultaneously among plant species seem to be widespread In nature. In the present paper, we reviewed the mechanism and ecological importance of positive Interactions In plant communities, emphasizing the certainties and uncertainties that have made It an attractive area of research. Positive Interactions, or facilitation, occur when one species enhances the survival, growth, or richness of another. The Importance of facilitation in plant organization increases with ablotlc stress and the relative Importance of competition decreases. Only by combining plant interactions and the many fields of biology can we fully understand how and when the positive Interactions occur.

关键词： competition environmental gradient facilitation plant community plant-plant communications positive interactions.

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Health Sequence of plant community of Sand-accumulation Belt at the Upwind Edge of Minqin Oasis

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Journal of Landscape Research 2020年第3期12卷 65-69,74页

作者： CHANG Zhaofeng ZHU Shujuan DUAN Xiaofeng ZHAO Peng ZHANG Jianhui Gansu Desert Control Research Institute LanzhouGansu 730070China

A sand-accumulation belt came into being during the process of desert control in recent 60 years at the edge of oasis,especially at the upwind places in desert area in Hexi Corridor of *** them,the sand-accumulation belt at the edge of Minqin Oasis is relatively typical and the most *** vegetation on the sand-accumulation belt is not only the formation factor of the sand-accumulation belt,but also an important factor to maintain the stability of the sand-accumulation *** a certain sense,the health status of the vegetation of the sand-accumulation belt determines the stability of the sand-accumulation *** order to analyze the vegetation status of the sand-accumulation belt,the health sequence analysis of the plant community was carried out of sand-accumulation belt at the edge of Minqin Oasis,by setting 11 lines of equal spacing of sand-accumulation belt at the edge of Minqin Oasis,and through the vegetation survey of more than 60 *** vegetation on the sand-accumulation belt at the edge of Minqin Oasis is generally *** for the health sequence of this study,the health status of vegetation of the sand-accumulation belt formed by artificial sand fixation forest is better than that of vegetation of the sand-accumulation belt formed by natural shrub at the edge of Minqin *** health status of vegetation of the sand-accumulation belt of mixed forest of arbor and shrub is the worst at the edge of Minqin *** dominant species Tamarix laxa on the sand-accumulation belt in the lower reaches of the oasis are seriously withered,and their health is the *** is potential danger of the sand-accumulation belt being blown and *** abandonment of farmland,protection of protection forest and sand-accumulation belt at the edge of farmland in sand area is a new problem,which is worth considering.

关键词： The edge of oasis Sand-accumulation belt plant community Health Minqin

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Research Overview on Urban plant community

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Journal of Landscape Research 2010年第2期2卷 43-46页

作者：廉丽华申曙光河北农业大学园林与旅游学院河北保定071000 河北省邯郸市园林局河北邯郸056000

The concept of plant community and community classification were expatiated, the study history and actuality were summarized, and the developmental trends of phytocoenology were prospected.

关键词： plant community community classfication community structure community ecology

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Effects of Grassland Caterpillars on plant community Structure of Alpine Kobresia Meadows and Soil Properties

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Animal Husbandry and Feed Science 2010年第4期2卷 22-25页

作者： YU Jian-long SHI Hong-xiao College of Pastoral Agriculture Science and Technology Lanzhou University Lanzhou 730016 China Grassland Research Institute Chinese Academy of Agriculture Science Hohhot 010000 China

[Objective] To investigate the relationship between the grassland caterpillar with different grades and the structure of alpine Kobresia meadow or soil feature. [Method] A total of 10 plots （20.00 m × 20.00 m） were chosen. In each plot, five smaller plots （5.00 m × 5.00 m） were randomly selected and six sample plots （0.25 m × 0.25 m） were then selected in each smaller plot. The biomass, vegetation height, grasslayer thickness, bare land area, soil moisture and total vegetation cover degree were determined. Data were analyzed statistically by Excel 2003 and SPSS 13.0 software. [ Result] There was a significant difference （P 〈 0.05） between the grassland caterpillars at different hazard grades and the structure of alpine Kobresia meadow or soil properties. [ Conclusion] With the increase of grassland caterpillar density, the plant community structure of alpine Kobresia meadows changes from sedge family-dominant community to the forbs-dominant community.

关键词： Alpine Kobresia meadow Grassland caterpillar plant community

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Relationships between plant community Characteristic and Soil Factors in Binhai New Area of Tianjin

Relationships between Plant Community Characteristic and Soi...

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2012年环境污染与大众健康学术会议

作者： Shangao Xiong 1 , Cui Hao 1 , Hongyuan Li 1 , Weiqing Meng 2 ,Fuqun Zhai 1 , Qingmin Zhang 1 1 College of Environmental Science and Engineering, Nankai University, Tianjin, China 2 College of Urban and Environment Scinence, Tianjin Normal University, Tianjin, China

Based on the investigation on plant community and soil factors of Binhai New Area using transects methods between July and September, 2008, the relationships between plant community and soil factors in Binhai New Area were researched. Canonical Correspondence Analysis （CCA） was applied to analyzed the species-environment and samples-environment two-dimensional ordination diagrams. There were 46 families, 135genera, 232 species,61 salt-tolerant *** wetland plants were divided into 4 subtypes: aquatic plants, humidogene plants, meso-xerophytism and xerophytism. Sorting among the 23 quadrates demonstrated that the position of different populations had related to the soil factors. Disparities between water content and salt content in the soil were the most important factors in the formation of vegetation pattern of Binhai New Area, available nitrogen content was the second important factor, while pH, orgnic matter content, available potassium content and nitrogen content were not related with the vegetation pattern. All these factors determined the population positions and characteristic. The sorting of dominant species had similar results with quadrates.

关键词： Binhai New Area plant community Canonical Correspondence Analysis (CCA)

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plant community Survey of National Photovoltaic and Energy Storage Empirical Experiment Platform(Daqing Base)

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Agricultural Biotechnology 2023年第3期12卷 42-45页

作者： Yang WANG Naipeng REN Siyu LI Xiangping LIU Shanmin QU Daqing Huanghe Optical Storage Empirical Research Co. LtdDaqing 163319China Department of Grassland Science College of Animal Science and TechnologyHeilongjiang Bayi Agricultural UniversityDaqing 163319China Heilongjiang Province Cultivating Collaborative Innovation Center for The Beidahuang Modern Agricultural Industry Technology Daqing 163319China Key Laboratory of Efficient Utilization of Feed Resources and Nutrition manipulation in Cold Region of Heilongjiang Province Daqing 163319China

[Objectives] This study was conducted to explore the characteristics of natural grassland plant communities in the National Photovoltaic and Energy Storage Empirical Experiment Platform(Daqing Base), so as to provide data reference for local grassland resources. [Methods] June to July, 2022, standard plot site investigation was carried out to investigate vegetation species, relative height, relative coverage, relative abundance, relative frequency and dominance in the National Photovoltaic and Energy Storage Empirical Experiment Platform in Datong District, Daqing City of Heilongjiang Province, and to analyze plant community structures in the photovoltaic DC field. [Results] The photovoltaic DC field contained 22 species of plants, of which Suaeda salsa was the common species. The dominant species in photovoltaic DC field were Leymus chinensis, Eleocharis intersita, Carex duriuscula and Carex rugurosa. [Conclusions] The dominant vegetation types were Poaceae and Cyperaceae in the natural grassland of the National Photovoltaic and Energy Storage Empirical Experiment Platform(Daqing Base).

关键词： Photovoltaic DC field plant community Distribution characteristics

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Physiological and psychological responses to tended plant communities with varying color characteristics

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Journal of Forestry Research 2024年第1期35卷 183-201页

作者： Siyuan Zheng Yanzhen Zhou Haiyan Qu School of Architecture and Urban Planning Shenyang Jianzhu UniversityShenyang 110168People’s Republic of China

Exposure to plants has been reported to promote health and reduce stress,and plant color has direct impacts on physical and mental *** used images of common types of tended plant communities in Shenyang,China,with combinations of yellow,green,and red foliage,as experimental stimuli.A total of 27 images were used as visual *** used electroencephalography to measureαwave activity(8-13 Hz)in 40 subjects while they viewed visual *** data were combined with subjective questionnaire data to analyze the relaxing effect of images of tended plant communities with different color types and proportions on *** results revealed that,although there were slight differences between the electroencephalography and psychological findings,women were significantly more relaxed than men after viewing the *** and psychological responses varied with the types and proportions of colors in the tended plant communities:those of foliage with combinations of two or three colors induced stronger responses than images with a single ***,(1)for one-color plant communities,green or yellow plant communities induced a stronger relaxation effect than red plant communities;(2)for two-color plant communities,the optimal color proportion was 55%+45%,and the green+yellow and green+red color combinations induced a stronger relaxation effect;(3)for three-color plant communities,the relaxation effect was strongest when the color proportion was 55%green+25%yellow+20%*** data would provide a plant color matching in future plant landscape design,which may be helpful for creating healthy and relaxing environments.

关键词： plant community Color type Color ratio Electroencephalography Subjective questionnaire

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Degradation of Populus euphratica community in the lower reaches of the Tarim River, Xinjiang, China

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Journal of Environmental Sciences 2005年第5期17卷 740-747页

作者： LIU Jia-zhen CHEN Ya-ning CHEN Yong-jin ZHANG Na LI Wei-hong Xinjiang Institnte of Ecology and Geography Chinese Academy of Sciences Urumqi 830011 China Graduate School of Chinese Academy of Sciences Beijing 100039 China

To investigate the relationships between the degradation of plant community and groundwater level in the lower reaches of the Tarim River, nine monitored sections were set along the main stream, where there had been no runoff for nearly 30 years. The characteristics of plant communities were analyzed. It was found that the coverage of trees gradually decreased along the groundwater depth gradient, while the coverage of shrubs slightly increased rather than decreased at first and then gradually decreased, and the coverage of herbs steadily decreased at the beginning and then quickly decreased. The species diversity and species richness of both herbs and woody plants showed obvious degrading trends, while the variations in species evenness were slight. The degrading sequences of species were related to their physiological and ecological characteristics, especially their sensitivity to changes of groundwater table. The herbs with shallow roots first degenerated or disappeared when the groundwater table fell, and then did the deep-rooted herbs, and finally the trees and shrubs with strong tolerance to drought degenerated. The Populus euphratica communities showed typical degrading characteristics, namely the dominant species Populus euphratica remained its dominant status during the degradation. Overall, the existence of strongly tolerant-drought species was the obvious indication of plant species degradation; while simplification of community structure and the decrease of species richness were the obvious indication of plant community degradation.

关键词： degradation plant community coverage species diversity Tarim River

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Hydrological setting of infertile species-rich wetland——a case study in the warm temperate Japan

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Journal of Environmental Sciences 2003年第2期15卷 279-283页

作者： Kikuchi A. Nakagoshi N. Onda Y. Graduate School for International Development and Cooperation Hiroshima UniversityGraduate School for International Development and Cooperation Hiroshima UniversityInstitute of Geoscience University of Tsukuba Higashi-Hiroshima City 739_8529 JapanHigashi-Hiroshima City 739_8529 JapanIbaraki 305_8571 Japan

The detailed groundwater flow and water chemistry to illustrate landscape structure of the infertile peatless mire by using piezometers and groundwater wells were measured. The instruments were installed in lines through a small spring-fed wetland underlying little peat from the hillslope to the valley bottom in southwestern Japan. Flow net and EC data clearly indicated that the wetland was situated in a high-EC groundwater upspring area. The low-productivity graminous vegetation was related with four hydrological factors such as: (1) high water level; (2) low-EC(plant communities of the peatless mire in southwestern Japan are similar to those of raised bog in northern cool temperate Japan. There have been some reports verifying that the underlying mineral substrata of such wetlands were quartzile rocks such as granite, rhyolite, chart and well-leached sand. Results showed (1) low cation availability affects the water acidity; (2) upward seepage of high-EC groundwater composed the foundation of the investigated peatless mire; and (3) the poor mineral condition seems to play a similar role to northern ombrotrophic(rain-fed) condition.

关键词： eco-hydrology electrical conductivity groundwater flow plant community wetland

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