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Table of Content
    Volume 24 Issue 1
    10 January 2000
      
    Research Articles
    Modeling Growth and Succession of Northeastern China Forests and Its Applications in Global Change Studies
    YAN Xiao-Dong, ZHAO Shi-Dong, YU Zhen-Liang
    Chin J Plan Ecolo. 2000, 24 (1):  1-8. 
    Abstract ( 2373 )   PDF (759KB) ( 1264 )   Save
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    NEWCOP(Northeast Woods Competition Occupation Proccessor), a gap class model computer simulation model has been built to simulate the species composition dynamics of the northeast China forests, which simulates generation, growth and death of every tree on a forest stand. NEWCOP classifies the tree’s regeneration into 3 types: seedling, sprouting and diffuse so that the ecological theories such as seed bank, seedling bank and effect of environmental factors on regeneration can be applied to regeneration modeling. NEWCOP can deal with the incomplete shading deciduous trees on evergreen trees reasonably to simulate annual regeneration and growth of evergreen trees before the deciduous leave return during earlier summer. NEWCOP finds a new type of mortality: death induced by small relative diameter growth, which can simulate the death of bigger or old trees. The simulation validation along the environmental gradient shows :NEWCOP model can reproduce correct distribution of forest types, correct tree species composition of climax forests, correct succession pattern of main forest types in northeastern China forests, and correct DBH distribution of forest stand at some cases. The application simulation under climate change scenarios shows: Different climate change scenarios have different effects on the forests; The deciduous tree species may increase in tree species composition in the future; There may be a great decrease of the area in which forest can grow in the future ,and most decreases may occur within the first 100 years after simulation beginning.
    A Forest Vegetation NPP model Based on NDVI
    ZHENG Yuan-Run, ZHOU Guang-Sheng
    Chin J Plan Ecolo. 2000, 24 (1):  9-12. 
    Abstract ( 1897 )   PDF (245KB) ( 976 )   Save
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    Studies on a NPP Model of Salinized-meadow in the North of Tarim Basin
    ZHANG Hong, FAN Zi-Li
    Chin J Plan Ecolo. 2000, 24 (1):  13-17. 
    Abstract ( 1815 )   PDF (431KB) ( 787 )   Save
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    Biomass and Net Primary Productivity in a Acacia mangium Plantation in Heshan, Guangdong, China
    REN Hai, PENG Shao-Lin, XIANG Yan-Ci
    Chin J Plan Ecolo. 2000, 24 (1):  18-21. 
    Abstract ( 1923 )   PDF (412KB) ( 1215 )   Save
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    Growth Dynamics of Dominant Tree Species in Dark Coniferous Forests on Gongga Mountain
    LUO Ji, CHENG Gen-Wei, YANG Zhong, YANG Qing-Wei
    Chin J Plan Ecolo. 2000, 24 (1):  22-26. 
    Abstract ( 1933 )   PDF (406KB) ( 979 )   Save
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    Gongga Mountain is representative of the typical mountain ecological system type in the region of the eastern Tibet Plateau with high mountains and deep valleys. Dark coniferous forest is the typical vegetation type of this region. Logistic models were established to describe growth in height, diameter and volume in the dominant trees of these forests at Gongga Mountain: Abies fabri, Picea brachytyla and A. squamata. These parameters were well described by a logistic model. The fast-growing period and fast-growing points differed among the three dominant trees. The fast-growing phase of tree volume in A. fabri occurred at 78~107 years of age, while that of P. brachytyla occurred at 113~152 years. The relationship of relative growth and the different growth indices in the dominant tree species and their dynamics were explored within the context of theories of forests regeneration and succession.
    Decomposition of Leaf Litter of Chinese Fir and in Mixture with Major Associated Broad-leaved Plantation Species
    LIAO Li-Ping, MA Yue-Qiang, WANG Si-Long, GAO Hong, YU Xiao-Jun
    Chin J Plan Ecolo. 2000, 24 (1):  27-33. 
    Abstract ( 1821 )   PDF (554KB) ( 1272 )   Save
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    The Effect of Nitrogen Addition on Soil Nutrient Leaching and the Decomposition of Chinese Fir Leaf Litter
    LIAO Li-Ping, GAO Hong, WANG Si-Long, MA Yue-Qiang, HUANG Zhi-Qun, YU Xiao-Jun
    Chin J Plan Ecolo. 2000, 24 (1):  34-39. 
    Abstract ( 2137 )   PDF (502KB) ( 1186 )   Save
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    Genet Characters of Hedysarum Laeve and the Characters of Its Ramet Population in Different Habitation Mu Us Sandland
    CHEN Yu-Fu, DONG Ming
    Chin J Plan Ecolo. 2000, 24 (1):  40-45. 
    Abstract ( 1829 )   PDF (488KB) ( 971 )   Save
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    Clonal Growth of Ligularia virgaurea: Morphological Responses to Nutritional Variation
    SHAN Bao-Qing, DU Guo-Zhen, LIU Zhen-Heng
    Chin J Plan Ecolo. 2000, 24 (1):  46-51. 
    Abstract ( 1896 )   PDF (480KB) ( 996 )   Save
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    Clonal growth of the perennial plant Ligularia virgaurea was studied in respect to varying nitrogen availability and habitat. The results showed: 1) Spacer length was affected by resource levels and community characteristics. Increased nitrogen 1ed to shortened spacer length, while spacer length was also shortened in the artificial community relative to the natural community (alpine meadow). This shows strong morphological plasticity in spacer of L.virgaurea in response to varying resource levels and habitat quality; 2) Branching intensity increased with resource levels, but there was no obvious difference between the natural and artificial communities. The formation and growth of ramets is affected by both the environmental resource condition and the growth condition of genets. 3) Branching angle of L. virgaurea was not affected by resource levels and habitat: its morphological plasticity was very low. 4) Under conditions of resource depletion or community crowding resource allocation to roots was high, further showing that resource allocation patterns are also affected by both environmental resource conditions and community structure.

    Landscape Classification and Cartography of Sandy Desertified Land: A Case Study in the Mu Us Sandy Region
    WU Bo
    Chin J Plan Ecolo. 2000, 24 (1):  52-57. 
    Abstract ( 1896 )   PDF (574KB) ( 1097 )   Save
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    A set of methodologies for landscape classification and cartography of sandy and desertified land in arid and semi-arid areas are suggested. Firstly, the basic pattern elements of landscape are determined and landscape elements classified according to the combination of basic pattern elements. Secondly, the classification of landscape elements is made through field investigation and interpretation of remotely-sensed imagery. Finally, with the help of GIS landscape map was completed. This method was applied to the landscape classification and cartography of the Mu Us sandy land using 1:200 000 TM images with results indication universal applicalility to transitional zone farming and grazing areas of north China.
    Changing of Landscape Diversity with Time in Xilinguole Steppe
    WU Yun-Na, LI Zheng-Hai
    Chin J Plan Ecolo. 2000, 24 (1):  58-63. 
    Abstract ( 1732 )   PDF (421KB) ( 872 )   Save
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    Studies on the Species Diversity of the Closed Stable Forest and the Disturbed Forest of Castanopsis eyrei in Wuyishan National Nature Reserve
    LI Zhen-Ji, LIU Chu-Dian, YANG Zhi-Wei, HE Jian-Yuan, LIN Peng
    Chin J Plan Ecolo. 2000, 24 (1):  64-68. 
    Abstract ( 1296 )   PDF (360KB) ( 1348 )   Save
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    Study on the Water Ecology of Artificial Acacia Mangium Forest in the Heshan Hill Region, Guangdong Province
    ZENG Xiao-Ping, ZHAO Ping, PENG Shao-Lin
    Chin J Plan Ecolo. 2000, 24 (1):  69-73. 
    Abstract ( 1949 )   PDF (361KB) ( 860 )   Save
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    Transpiration rate (E) and stomatal conductance (gs) in leaf of Acacia mangium were measured in a subtropical low hilly area of Guangdong Province, South China. Results showed that E and gs had a similar daily variation, both exhibiting a bimodal pattern in summer, and single-peak pattern in winter. The highest average E was found in summer, and the lowest in winter: E in winter was just 27.6 % of that in summer. The water consumption through transpiration of the A. mangium forest showed a clear difference between drought and wet seasons. Annual water consumption through transpiration was calculated as 1625. 1mm, which accounted for 78.3% of precipitation during the same period. The result indicated that water consumption through transpiration of A. mangium forest could approach that of a tropical rainforest.

    Potential of Yunnan Pine Forest on Soil Erosion Control in the Hutiaoxia Gorge area, SW China
    ZHOU Yue, LI Yu-Hui, David Watts
    Chin J Plan Ecolo. 2000, 24 (1):  74-81. 
    Abstract ( 1934 )   PDF (611KB) ( 649 )   Save
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    As a typical representative in the gorges and deep valleys in the upper-reaches of the Yangtze River, SW China, the Hutiaoxia Gorge Area has a serious environmental problem of soil erosion. To tackle the erosion problem, a large area of suitable mountains has been reforested. Yunnan pine is one of the most wildly used tree species for reforestation. This study is trying to investigate the hydrological effect and its potential of the pine forest on soil erosion control, taking the Hutiaoxia Gorge Area as an example. The study has found that the dense pine forest was able to intercept up to 31.1% of total rainfall throughout the rainy season in 1993. The total splash detachment in the forest (4.9kg·m-2)was 19.7% lower than the one on the bare land(6.1kg·m-2). The total soil loss in the forest was considerably decreased to 32.9g·m-2, as compared with 57.9g·m-2 on the bare land, showing a soil erosion reduction by 43.19%. As experiments indicated, rain intensity here was the most affecting factor on soil erosion and the hydrological effect of the forest as well. On the other hand, the dense forest was also found to cause drip splash detachment by producing large leaf drips; and it did not actually reduce surface runoff. Considering the comprehensive role, however, the dense forest has a net positive effect on erosion limitation. Compared with dense grasses, the forest seems to be less effective on soil erosion control.
    Seed Characteristics of Endangered Plant Cathaya aargyrophylla
    XIE Zong-Qiang, LI Qing-Mei
    Chin J Plan Ecolo. 2000, 24 (1):  82-86. 
    Abstract ( 1923 )   PDF (382KB) ( 946 )   Save
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    Methane Fluxes from Mangrove Communities at Dongzhai Harbour, Hainan
    LU Chang-Yi, YE Yong, WONG Yuk-Shan, TAM N. F. Y.
    Chin J Plan Ecolo. 2000, 24 (1):  87-90. 
    Abstract ( 2016 )   PDF (364KB) ( 1012 )   Save
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    Using a static chamber technique, methane fluxes from sediments of five mangrove communities at four sites were studied. An average value of 0.81mg·m-2·d-1 was observed. Using polyethylene bags, methane fluxes through leaves of six mangrove species were also studied. It indicates that mangrove leaves generally absorbed atmospheric methane as an overall effect. Diurnal variations of methane fluxes from sediments of Bruguiera sexangula community at Changning site were related to tidal conditions in the forest while flat variations of methane fluxes from sediments of this community were related to soil water contents. There were two different seasonal patterns of methane flux from soils in the five mangrove communities.

    The Relation Between the Membrane Protective System and Semilethal Temperature of Gardenia jasminoides Ellis Leaves as Temperature Fell
    YAN Han-Jing, TAN Feng
    Chin J Plan Ecolo. 2000, 24 (1):  91-95. 
    Abstract ( 1688 )   PDF (341KB) ( 1036 )   Save
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    The paper investigates the changes of the semilethal temperature and membrane protective system of Gardenia jasminoides Ellis leaves as temperature fell. The results show that the semilethal temperature decreased. The activity of SOD,POX and the content of Vc increased, leading to increasing of the ability of the membrane protective of scavenging free radical. In this way the level of O2 and content of MDA decreased. The decline of the semilethal temperature caused by the changes of membrane protective system was the foundation of rising the cold resistance.
    Seasonal Changes of Endogenous Phytohormones, Fatty Acid Composition of Chloroplast Membrane and Enzymes of Membrane-lipids Antioxidation System in two Desert Plants
    CUI Su-Xia, WANG Wei, CHEN Guo-Cang, ZHANG Cheng-Lie
    Chin J Plan Ecolo. 2000, 24 (1):  96-101. 
    Abstract ( 1930 )   PDF (525KB) ( 972 )   Save
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    The Influence of Enhanced Ultraviolet-B Radiation on Chloroplast Membrane Composition and Membrane Fluidity in Wheat Leaves
    YANG Jing-Hong, CHEN Tuo, WANG Xun-Ling
    Chin J Plan Ecolo. 2000, 24 (1):  102-105. 
    Abstract ( 2027 )   PDF (303KB) ( 1144 )   Save
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    Changes in chloroplast membrane composition and membrane fluidity in wheat leaves exposed to 0kJ·m-2 (CK), 8.82kJ·m-2 (T1) and 12.6kJ· m-2 (T2) were studied. Ultraviolet-B radiation induced the degradation of photosynthetic pigments (including chlorophyll and carotenoids),an increase in MDA content and change in the fatty acid composition of chloroplast membrane and a decrease in IUFA. Compared with a control treatment ,both the activity of the Hill reaction and the fluidity of chloroplast membranes were reduced by ultraviolet-B exposure. The analysis indicated that membrane peroxidation might be one of the causes of chloroplast membrane damage induced by ultraviolet-B radiation.
    Effects of Limited Irrigation on the Root Development of Spring Wheat in a Semi-arid Region
    WEI Hong, LIN Kui, LI Feng-Min, ZHANG Rong, YUAN Bao-Zhong
    Chin J Plan Ecolo. 2000, 24 (1):  106-110. 
    Abstract ( 1922 )   PDF (339KB) ( 1014 )   Save
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    A field trial of limited irrigation on dryland spring wheat in a semi-arid region of China showed that: irrigating at the seedling stage reduced the total root weight and root density from the 3-leaf stage to heading stage of spring wheat markedly; it promoted the root growth at the flowering stage; and increased the water use efficiency and grain yield of spring wheat. However, water stress at the seedling stage resulted in the root system becoming too large during the early growth period and thus influencing shoot growth and aggravating the deficit of soil water, thereby ultimately seriously reducing the grain yield.
    Fractal Model of Vegetation Pattern: the Fractal Properties of Vegetation Pattern
    MA Ke-Ming, ZU Yuan-Gang
    Chin J Plan Ecolo. 2000, 24 (1):  111-117. 
    Abstract ( 1665 )   PDF (694KB) ( 953 )   Save
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    Some shortcomings existed in present vegetation pattern analysis, fractal geometry is considered to be an useful tool to deal with those problems. Selected researches on different levels ,that is ,from branching to landscape, were introduced first, the application of scale, self-similarity and fractal dimension in vegetation pattern analysis were then explained, and the fitness and challenges of applying fractal model in vegetation pattern analysis were pointed out at last. On the basis of the above discussions, the fractal mechanisms of vegetation pattren was declared, which means vegetation pattern can be regarded as a fractal with self-organizing properties. The fractal model of vegetation pattern was evaluated and prospected, some problems need to be cared about in research were put forward ,and some future developing directions were predicted at the end of the paper.
    Study on Camellia japonica Poperties of Vegetation Pattern
    ZHANG Zhi-Guo, WANG Ren-Qing
    Chin J Plan Ecolo. 2000, 24 (1):  118-122. 
    Abstract ( 1843 )   PDF (370KB) ( 984 )   Save
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    We investigated the statistic characteristic of the Camellia japonica population in the Changmenyan Island where is the north distribution boundary of the species. The species was mainly distributed from 20 to 80m a. b. 1.The diameter of the individuals was from 2 to 45cm, and the height of the trees was from 0. 4 to 4.5m. The life table shows that the majority of the individuals were those of middle size. The survivorship curve indicates that the mortality is high at the younger stage than in others. The size distribution pattern was of the Ⅲ type of Bodenheimer’s. Three theoretical models, Poisson, Negative Binomial Distribution and Neyman were used to investigate the spatial pattern of the population. The results indicate that the population spatial patterns had high consistency with the Binomial Distribution. Therefore the spatial pattern of the population was of contagious distribution. The indexes are: K =0. 6219, C=17. 7327, I=16. 7327, 1/K=I. 5896, m*/m=2. 5896.

    What is Metapopulation,Really?
    WU Jian-Guo
    Chin J Plan Ecolo. 2000, 24 (1):  123-126. 
    Abstract ( 1624 )   PDF (390KB) ( 952 )   Save
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    Metapopulation is an important concept in several ecological fields, including population ecology, landscape ecology, and conservation biology. Recently, the term, metapopulation, has increasingly appeared in Chinese journal papers and book chapters in ecology. However, the multiple and distinctive Chinese translations of the term have inevitably caused confusion, and also seem to reflect differences in the understanding of the term, metapopulation, by the authors. Thus, this paper examines the definition of metapopulation and its evolution, and then discusses the appropriateness of the different Chinese translations.

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