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Influence of tourist disturbance on soil properties, plant communities, and surface water quality in the Tianchi scenic area of Xinjiang, China

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Journal of Arid Land 2016年第2期8卷 304-313页

作者： WEN Bin ZHANG Xiaolei YANG Zhaoping XIONG Heigang QIU Yang Xinjiang Institute of Ecology and Geography Chinese Academy of SciencesUrumqi 830011China College of Resource and Environment Sciences Xinjiang UniversityUrumqi 830046China University of Chinese Academy of Sciences Beijing 100049China Department of Economic Management Huanghuai UniversityZhumadian 463000China Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000China

The impact of tourist disturbance on the environment has become a focal issue of environmental science, ecology, and travel management studies. To assess the influence of tourist disturbance on soils and plants in the Tianchi scenic area of Xinjiang, China, we compared soil properties and plant community characteristics at 0, 5, 10, and 20 m from the tourist trail within areas at three different altitudes, where the intensities of tourist disturbance are distinct. Surface water quality was also studied at three different levels relative to the Tianchi Lake. The results showed that tourist disturbance significantly increased soil pH within 10 m from the trail and soil bulk density on the edge of the trail, but significantly reduced soil organic matter and total nitrogen contents within 5 m from the trail. The number of tree seedlings on the edge of the trail and the shrub coverage and height of herbaceous plants within 5 m from the trail significantly decreased due to tourist disturbance. Changes in herbaceous plant diversity differed by soil zones. In the high altitude region, tourist disturbance led to a remarkable increase in the herbaceous plant diversity on the edge of the trail, while in the low altitude region, tourist disturbance had a low impact on the diversity of herbaceous plants. In addition, tourist activities polluted the surface water, significantly reducing water quality. Thus, current tourist activities have a significant negative impact on the ecological environment in the Tianchi scenic area.

关键词： tourist disturbance soil properties plant communities water quality Tianchi scenic area

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Lignin characteristics in soil profiles in different plant communities in a subtropical mixed forest

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Journal of plant Ecology 2018年第4期11卷 560-568页

作者： Xinggang Wang Qiuxiang Tian Qianxi Li Chang Liao Mei He Feng Liu Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical GardenChinese Academy of SciencesWuhan 430074China University of Chinese Academy of Sciences Beijing 100049China

Aims Lignin is generally considered as an important indicator of soil organic carbon(SOC)storage and *** evaluate the effects of plant communities and soil depth on soil lignin is critical to better understand forest carbon *** We compared lignin content and chemical signature in three soil depths of four major plant communities in a subtropical forest,which located in the north part of Wuling Mountains,*** was measured using CuO oxidation *** Findings Both lignin content and its biochemical signature in plant litter varied among ***,these differences were mostly no longer exist in the upper soil *** chemistry in soils inherited some of the biochemical signature of lignin in litter,but in a diminished *** results suggest that different plant communities had similar decomposition process with vary-ing rates,caused diminished differences in lignin content and its biochemical *** content decreased with soil depth,but the biochemical signature of lignin was not significantly dif-ferent among soil layers for all communities,which suggests that vertical movement of lignin within the soil profile is very likely a key process causing this similar biochemical *** results emphasized the important roles of lignin inputs and soil eluviation in shaping lignin characteristics and distribution in forest soils,which pinpoint the urgent need to consider hydrological processes in studying forest soil carbon cycling.

关键词： lignin content degradation status plant communities soil profile soil carbon

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Spatial and environmental effects on plant communities in the Yellow River Delta,Eastern China

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Journal of Forestry Research 2009年第2期20卷 117-122页

作者： SONG Chuang-ye1, 2, LIU Gao-huan1, LIU Qing-sheng1 1 Institute of Geographic Sciences and Nature Resources Research, Chinese Academy of Sciences, Beijing 100101, China 2 Graduated School of Chinese Academy of Sciences, Beijing 100039, China Institute of Geographic Sciences and Nature Resources Research Chinese Academy of Sciences Beijing China Graduated School of Chinese Academy of Sciences Beijing China

Types and structure of plant communities in the Yellow River Delta were investigated by using detrended canonical correspon-dence analyses(DCCAs) and a two-way indicator species analysis(TWINSPAN).The distribution pattern and influential factors of the plant communities were also analyzed by testing elevation, slope, soil characteristics, longitude and latitude of 134 vegetation samples collected by representative plot sampling *** showed that all the 134 vegetation samples could be divided into seven vegetation groups, separately dominated by Robinia pseucdoacacia, Imperata cylindrical, Miscanthus saccharifleus, Suaeda salsa, Aeluropus sinensis, Phragmites australis and Tamarix *** vegetation distribution pattern was mainly related to elevation, ground water depth and soil characteristics such as salinity and soluble *** the factors affecting distribution pattern of the plant communities, the species matrix explained by non-spatial environmental variation accounts for 45.2% of total *** variation and spatial-structured environmental variation explain 11.8%, and 2.2%, *** 40.8% of undetermined variation is attributed to biological and stochastic factors.

关键词： detrended canonical correspondence analyses environmental factors plant communities spatial factors Yellow River Delta two-way indicator species analysis

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Quantitative classification and analysis on plant communities in the middle reaches of the Tarim River

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Journal of Geographical Sciences 2003年第2期13卷 225-232页

作者： ZHANG Yuanming,CHEN Yaning,ZHANG Daoyuan(Xinjiang Institute of Ecology and Geography, CAS, Urumqi 830011, China) Xinjiang Institute of Ecology and Geography CAS Urumqi 830011

plant communities were sampled in the lower reaches of the Tarim River, Xinjiang. The results showed that there are 23 species belonging to 21 genera in 11 families, most of which have low occurrence frequency in quadrats. The most common species is Tamarix ramosissima, which occurred in 17 sites accounting for 89.47% of the total 19 sites. Quantitative classification (TWINSPAN) and ordination (CCA) methods were used to study the distribution patterns of 23 plant species in 19 sites in this valley. TWINSPAN results showed that the plant communities in the middle reaches of the Tarim River could be divided into 3 groups and the sampling sites could be divided into 7 types in 3 groups. CCA results were consistent with TWINSPAN results, and showed species distribution patterns correlated with major environmental variables of groundwater level and soil moisture.

关键词： TWINSPAN CCA plant communities environmental factors the Tarim River CLC number:Q948.11

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Stability and Ecological Effects of Main plant communities in Minqin Desert Area

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Animal Husbandry and Feed Science 2015年第3期7卷 191-196页

作者： Chang Zhaofeng Duan Xiaofeng Han Fugui Zhong Shengnian Wang Qiangqiang Zhang Jianhui Gansu Desert Control Research Institute Minqin National Station for Desert Steppe Ecosystem Studies

[ Objective ] To elucidate the change trend in stability and ecological effects of plant communities in desert along with global wanning. [ Method ] The data of site-specific observation on five main plant communities at ten plots in Minqin desert area were used to analyze the stability and ecological effects of desert plant communities by using two indicators vegetation coverage and projective cover degree. [ Results ] The vegetation coverage of Artemisia arenaria and Ephedra przewalskii, and the projective cover degree of A. arenaria and man-made Haloxylon ammodendron forest decreased remarkably; and the vegetation coverage of Ni- traria tangutorum was also decreased to some extent. [ Conduslon] （1） The plant communities with poor vegetation coverage gives a relatively strong stability, while that with high vegetation coverage has a relatively poor stability; （2） the yearly precipitation is the determinant of vegetation coverage and projective cover deglee; （3） the ecological function is found to be most remarkable in per unit area N. tangutorum, followed by E. przewalskii and N. tangutorum ＋H. ammodendron, and least in per unit area A. Arenaria. The vegetation is sparse in desert and plant branches does not distribute regularly, thus the crown-based vegetation coverage can not reflect the actual surface coverage.

关键词： plant communities Stability Ecological effects Minqin desert area

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Ordination of plant communities at Nazlochai Basin in West Azarbaijan rangelands of Iran

Ordination of plant communities at Nazlochai Basin in West A...

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ⅩⅪ International Grassland Congress and the Ⅷ International Rangeland Congress

作者： Torkan,J University of Urmia-Iran Alijanpoor A. University of Urmia-Iran

＜正＞Introduction One of the problems associated with community structure is how the spatial pattern of organisms in the community relates to the interaction of organism with the *** is the technique of arranging unites（for example,forest stands） in a uni-or multidimensional order in such a manner that the position of each unit along the axis or axes conveys the maximum information about its composition or relationship with the other *** is based on the assumption that

关键词： Iran ordination plant communities

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The role of graveyards in species conservation and beta diversity:a vegetation appraisal of sacred habitats from Bannu,Pakistan

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Journal of Forestry Research 2020年第4期31卷 1147-1158页

作者： Saqib Kamran Shujaul Mulk Khan Zeeshan Ahmad Amjad Ur Rahman Majid Iqbal Fazal Manan Zahoor Ul Haq Saif Ullah Department of plant Sciences Quaid-i-Azam UniversityIslamabadPakistan

Graveyards or sacred groves are often places of natural vegetation protected by spiritual believers because of their sacred beliefs and indigenous culture.A study of graveyards was conducted to determine their role in species conservation,community formation,and associated indicators and species composition using multivariate statistical *** was hypothesized that variations in the age of graveyards would give rise to diverse plant communities under the impact of various edaphic and climatic *** ecological techniques were applied to determine various phytosociological *** the data were put in MS Excel for analysis in PCORD and CANOCO softwares for cluster analysis(CA),two-way cluster analysis(TWCA),indicator species analysis and canonical correspondence *** and TWCA through Sorenson distance measurements identified five major graveyard plant communities:(1)FicusBougainvillea-Chenopodium;(2)Acacia-Datura-Convolvulus;(3)Ziziphus-Vitex-Abutilon;(4)Acacia-Lantana-Salsola;and(5)*** such as Capparis decidua,Herniaria hirsuta,Salvadora oliedes and Populus euphratica were only present inside graveyards rather than outside and advocate the role of graveyards in species *** impact of different environmental and climatic variables plus the age of the graveyards were also assessed for comparison of plant communities and their respective indicator *** results indicate that higher chlorine concentration,age of graveyards,low soil electrical conductivity,lower anthropogenic activities,higher nitrogen,calcium and magnesium concentrations in the soil,and sandy soils were the strong environmental variables playing a significant role in the formation of graveyard plant communities,their associated indicators and species distribution *** results could further be utilized to evaluate the role of edaphic and climatic factors,indicator species and conservation management practices at a gr

关键词： Graveyards/Sacred groves plant communities Multivariate statistical techniques Indicator species Edaphic factors Conservation PCORD software

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Land surface roughness impacted by typical vegetation restoration projects on aeolian sandy lands in the Yarlung Zangbo River valley,southern Tibetan plateau

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International Soil and Water Conservation Research 2022年第1期10卷 109-118页

作者： Baojun Zhang Donghong Xiong Yongfa Tang Lin Liu Key Laboratory of Mountain Hazards and Earth Surface Process Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu610041China College of Water Conservancy and Hydropower Engineering Sichuan Agricultural UniversityYa'an625014China

Aeolian sandy lands are widespread and desertification is recognized as one of the main environmental issues in the Yarlung Zangbo River valley,southern Tibetan *** surface microtopographic var-iations induced by the near soil surface characteristics of plant communities are important compositions of land surface roughness,which likely influence wind *** study was conducted to quantify the effects of typical vegetation restoration on land surface roughness on the aeolian sandy lands,and to identify the main influencing factors of land surface roughness in the Yarlung Zangbo River *** bare sandy lands(as controls)and eight vegetated sandy lands with different restoration communities and ages were selected,and land surface roughness(LSR),as represented by surface microtopographic variations in this study,was measured by photogrammetric *** results showed that LSR significantly increased by 7.9-16.8 times after vegetation restoration on the aeolian sandy lands,and varied among different restoration communities and *** mostly restored communities of Sophora moorcroftiana and Populus *** greater LSR as compared to Artemisia wellbyi and Hedysarum *** succession from 6 to over 30 years,LSR gradually increased in the Sophora moorcroftiana restored sandy lands,but decreased in the Populus L restored sandy *** variations of LSR were mainly attributed to the differences in near soil surface characteristics of vegetation(plant stem diameter and coverage,and plant residue density)and biological soil crusts(coverage and thickness).Mixed plantation of Populus L and Sophora moorcroftiana was considered as the best restoration communities because of their effectiveness in increasing land surface roughness on the aeolian sandy lands in the Yarlung Zangbo River *** results would facilitate the understanding of the benefits of vegetation restoration in controlling wind erosion on the aeolian sandy lands.

关键词： Aeolian desertification Surface microtopographic variation Near soil surface characteristics plant communities Yarlung Zangbo River valley

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Ecological and floristic study of Hirmi woodland vegetation in Tigray Region,Northern Ethiopia

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Ecological Processes 2020年第1期9卷 615-633页

作者： Mehari Girmay Tamrat Bekele Sebsebe Demissew Ermias Lulekal Ministry of Mining and Petroleum of Ethiopia P.O.Box 486Addis AbabaEthiopia Department of plant Biology and Biodiversity Management Addis Ababa UniversityP.O.Box 3434Addis AbabaEthiopia

The dryland area in Ethiopia covers a substantial region endowed with diverse plant ***,the landmass has received less attention even if it has high ecological,environmental,and economic *** present study was conducted in Hirmi woodland vegetation,which is one of the dryland areas in Ethiopia,with the objective of investigating the floristic composition,plant community types,vegetation structure,communityenvironment relations and its regeneration *** and environmental data were collected from 80 sampling plots with a size of 25 m×25 m designated as the main *** at breast height(DBH),height,basal area,density,vertical structure,importance value index(IVI),and frequency were *** diversity and evenness were analyzed using Shannon diversity and evenness *** plant community types and vegetation-environment relationships were analyzed using classification and ordination tools,respectively.A total of 171 vascular plant species belonging to 135 genera and 56 families were *** 5.3%of the species were endemic and near-endemic to *** highest number of species was recorded in families Fabaceae(16.4%)and Poaceae(11.7%)followed by Asteraceae(7.0%),Combretaceae,Lamiaceae,and Moraceae(3.5%each).Five plant communities were *** to the results from ordination analysis,the floristic composition of these plant communities was significantly affected by altitude,slope,sand,silt,soil organic matter,total nitrogen,and *** vegetation structure reveals that a large number of individual species was categorized in the lower DBH,frequency,and height *** highest Shannon diversity index and evenness values of the study area were 4.21 and 0.95,*** leiocarpa,Combretum hartmannianum,Ziziphus mucronata,Terminalia macroptera,and Acacia polyacantha were the species with high *** endemic plants were in the IUCN red list categories of Ethiopia and *** o

关键词： Diversity Dryland Hirmi woodland Regeneration status plant communities

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Seasonal dynamics and impact factors of urban forest CO2 concentration in Harbin,China

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Journal of Forestry Research 2017年第1期28卷 125-132页

作者： Wenyu Zheng Yunwei Zhou Han Gu Zhongping Tian Gardening College Northeast Forestry UniversityHarbin 150040People's Republic of China Heilongjiang University of Science&Technology Harbin 150027People's Republic of China

CO2 concentrations in different plant communities （larch, birch, lilac, and grassland） were measured during the growing season in the Heilongjiang Forest Botanical Garden to study diurnal variation, seasonal and annual dynamics and factors that impact CO2 concentration in different spaces. CO2 concentration in different communities in green lands had an obvious diurnal variation, chronically decreasing, and temperature influenced the lilac area and the grassland. Seasonally, CO2 was lowest in the larch green land （344.03 ±23.03 μmol/mol） and highest in the grassland （360.13 ± 22.43 μmol/mol）. The overall trend in CO2 concentration was autumn 〉 spring 〉 summer; temperature is the main factor controlling variation in CO2 concentrations during the growing season; the CO2 concentration at the larch, birch, lilac, and grassland types of sites was negatively correlated with land surface temperature and air temperature, and the CO2 concentration at the larch and birch sites was positively correlated with atmospheric pressure. Without any obvious annual change law, further study and observation are needed.

关键词： CO2 concentration Ecological benefits Green land Impact factors plant communities

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