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| 1 | Analysis of Dynamics and Driving Factors of Wetland Landscape in Zoige,Eastern Qinghai-Tibetan Plateau显示文摘Zoige Wetland is one of the largest plateau wetlands in the world.This paper provides a dynamic analysis of spatial and temporal patterns of the wetland in Zoige, Eastern Qinghai-Tibetan Plateau, supported by ERDAS8.7 and ArcGIS9.0.It is the first comparative analysis of a system of rapidly changing wetland with landscape patterns in Zoige, using 3 classified landsat Thematic Mapper images of 1977, 1994 and 2001.The classified images were used to generate wetland distributing maps, and shape index(S), diversity index(H), dominance index(D), evenness index(E), fragmentation index(F) and fractal dimension(Fd) were calculated and analyzed spatiotemporally across pure grazing area in Zoige for each landscape type and in different periods(before 1977, during 1977~1994 and 1994~2001), as well as the driving forces of natural and anthropogenic.The study shows that for a comprehensive understanding of the shapes and trajectories of the shrinking and desertificated land expansion of the wetland, a spatiotemporal landscape metrics analysis in different periods is an improvement than only with landscape changing rates.This type of analysis can also be used to infer underlying social, economic, and political processes that drive the observed wetland forms.The results indicate that wetland patterns can be changed over relatively short periods of time.Thetotal area of lake reduced by 164.86 km2,grassland extended by 141.74 km2,semi-marsh extended by 105.94 km2 , marsh reduced by 86.00 km2;the number of landscape patches reduced by 56, and their average area decreased by 2.68 km2;the successions within lake, marsh, semi-marsh and grassland were found obviously;S decreased stepwise;D and F increased but H decreased;The changing rate after 1994 was 2.3 to 2.9 times greater than that before.The change of the wetland landscape patterns resulted in the interaction between socio-economic and natural forces of positive and negative aspects;and natural factors affected as assistant aspect.Some important human activities in this period led to the change of the landscape patterns in this region directly.Some measurements made by government and NGO delayed the converting process partly. | QIU Pengfei WU Ning LUO Peng WANG Zuyuan LI Maihe | 2009 | Journal of Mountain Science2009，6，1： | 19 |
| 2 | Soil Microbial Population Dynamics along a Chronosequence of Moist Evergreen Broad-leaved Forest Succession in Southwestern China显示文摘Little is known about whether soil microbial population dynamics are correlated with forest succession.To test the hypotheses that(1) soil microbial composition changes over successional stages,and(2) soil microbial diversity is positively correlated with plant species diversity,we determined the soil microbial populations,community composition,and microflora diversity in evergreen broad-leaved forests along a chronosequence of vegetation succession from 5 to 300 years in southwestern China.The soil microbial community was mainly composed of bacteria(87.1-98.7% of the total microorganisms and 10 genera identified),fungi(0.3-4.0%,7 genera),and actinomycetes(2.1-9.1%,8 species and 1 genus).There were significant differences in soil microbial populations among different successional stages and within the four seasons.The seasonal variations of the soil microbial community may be associated with the seasonal changes in environmental conditions.The changes in soil microbial diversity(Shannon-Wiener index) with successional time followed one-humped,convex curves peaked at-100 years since restoration,which is identical with the trends of the aboveground plant diversity.Higher plant diversity resulting in enhanced nutrient flow and root exudation may contribute to positive relationships between the soil microbial diversity and plant diversity.Hence,decreases in soil microbial diversity in the late-successional stages appear to be related to the net loss in species richness that occurs after 100 years since restoration.Our findings confirm the intermediate disturbance hypothesis that suggests diversity peaks at midsuccessional stages. | ZHU Wanze CAI Xiaohu LIU Xingliang WANG Jinxi CHENG Song ZHANG Xiuyan LI Dengyu LI Maihe | 2010 | Journal of Mountain Science2010，7，4： | 8 |
| 3 | Fractal characteristics of soils under different land-use patterns in the arid and semiarid regions of the Tibetan Plateau,China显示文摘 | Wang Xiaodan Li MaiHe Liu Shuzhen | 2006 | Geoderma2006，134，： | 1 |
| 4 | Fractal characteristics of soils under different land - use patterns in the arid and semiarid regions of the Tibetan Plateau, China 显示文摘 | Wang Xiaodan Li Maihe Liu Shuzhen | 2006 | Geoderma2006，134，2： | 1 |
| 5 | Fractal Characteristics of Soils Under Different Land-use Patterns in the Arid and Semiarid Regions of the Tibetan Plateau,China显示文摘 | WANG Xiaodan LI Maihe LIU Shuzhen LIU Gangcai | 2006 | Geoderma2006，134，： | 1 |
| 6 | Fractal characteristics of soils under different land-use patterns in the arid and semiarid regions of the Tibetan plateau, China 显示文摘 | Wang Xiaodan Li Maihe Liu Shuzhen | 2006 | Geoderma2006，134，12： | 1 |
| 7 | A Method for Estimating Vegetation Change Over Time and Space显示文摘 | Li Maihe Kraeuchi N | | Journal of Geograp0，，： | 1 |
| 8 | Fractal characteristics of soils under different land-use patterns in the arid and semiarid regions of the Tibetan Plateau, China显示文摘 | Wang Xiaodan Li Maihe Liu Shuzhen | 2006 | Geoderma2006，134，2： | 1 |
| 9 | Fractal characteristics of soils under different land-use patterns in the arid and semiarid regions of the Tibetan Plateau, China显示文摘 | Wang Xiaodan Li Maihe Liu Shuzhen | 2006 | Geoderma2006，134，12： | 1 |
| 10 | Fractal characteristics of soils under different land uses pat-terns in the arid and semiarid regions of the Tibetan Plateau, China显示文摘 | Wang Xiaodan Li Maihe Liu Shuzhen | 2006 | Geoderma2006，134，： | 1 |
| 11 | Fractal characteristics of soils under different land-use patterns in the arid and semiarid regions of the Tibetan Plateau, China显示文摘 | Wang Xiaodan Li Maihe Liu Shuzhen | 2006 | Geoderma2006，134，12： | 1 |
| 12 | Fractal charac- teristics of soils under different land-use patterns in the arid and semiarid regions of the Tibetan Plateau, China 显示文摘 | Wang Xiaodan Li MaiHe Liu Shnzhen | 2006 | Geoderma2006，134，： | 1 |
| 13 | Nitrogen and carbonsource-sink relationships in trees at the Himalayan tree lines com-pared with lower elevation ships 显示文摘 | Li Maihe Xiao Wenfa Shi Peili | 2008 | Plant Cell Environment2008，31，10： | 1 |
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