Table of Content

10 October 1998, Volume 17 Issue 05

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Energy Accumulation of the Cyclobalanopsis gauca Population

Ni Sui, Zhou Guangyu

1998, (5):  1-5. 

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The diurnal variation of the energy accumulation rate shows one or two-peak-changing patterns. The seasonal variation of totalyty of the diurnal energy accumulation is: autumn's>summer's>winter's>spring's. The layer variation of the energy accumulation rate is: tree's>subtree's>underbrush's. “Afternoon nap” is a general phenomenon with the population in its diurnal variation of energy rate and is the result of various physiological and ecological factors. The variation law of energy fixation of the population is in accordance with the law of energy accumulation, while variation law of energy absorption is in accordance with the energy dissipation of transpiration.

Investigation on the Current Status of Distribution and Population of the Green Peafowl in Xishuangbanna

Luo Aidong, Dong Yonghua

1998, (5):  6-10. 

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An investigation on the current status of distribution and population of the Green peafowl in the Xishuangbanna prefecture was carreied out during 1994-1995. According to the results of investigation, estimating population of the Green peafowl is only 19-25 in Xishuangbanna, the “peacock hometown” named in the past. And the more serious situation is that the survival population was distributed in three small inconnected areas:Dadugan,Jinno in Jinghong,and Manggao in Menghai. Decreasing rate of distribution is 84.15% compared with the situation in 1980's. Habitat lost, hunting and poisoned by pesticide are main three reasons that decreased the population.

Breeding Ecology and Nest Habitat Selection of Azure-Winged Magpie(Cyanopica cyana)Ⅱ.The Nest Habitat Selection

Ru Shaoguo, Hou Wenli, Liu yun, Li Duoyyuan

1998, (5):  11-13,23. 

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The results of measurements and the SMPRIC analysis of the factors that might affect the nest habitat selection of Azure-Winged magpie showed: The main factors of the nest habitat selection were illaminance,the height and chest diameter of nest tree and average plant height within the range of 10 meter; and the less important factors were nest height from the ground,plant density around 10m and height of the nearest plant. Comparison with the nest surounding in Hailong Reservoir, Rizhao and Beijing area also showed that the nest habitat selection was different in different reqions. The bird nests were secreter and higher in the region with higher population density and frequent humanbeing activities.

Experiment and Evaluation of the Complex Management Models of Pine Forest

Zhou Guomo, Jin Chonghua, Zhang Weicheng

1998, (5):  14-18. 

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The complex management of ecosystem can make full use of light,heat,space and land resources,effectively increase biomass and improve eclogical environment.In order to develop the economic and ecological effecfs,the studies on three complex management models between pine and each of shrub,herb and fungi were carried out in Lishui district,Zhejiang province during 1985-1993.The random block design was used in the experiment and thirty experimental combinations were designed.On the basis of studies of growth situation in each complex management model,economic and ecological effects were analysed.The models having good effects and recommended for extension include the pine-shrub model with combination of pine and Lespedeza formosa,the the pine-herb model with pine and Cynostemma pentaphyllum and the pine-fungus model with pine and Poriacocos.

Comparative Study on Esterase Isozyme of Gloeostrum incarnatum Isolated from Different Ecological Environment

Zhang Huiwen, Yao Zhihong, Shi Guangdong, Shi Zhongke

1998, (5):  19-23. 

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Different characteristics of the Esterase Isozyme of Gloeostrum incarnatum S. Ito & Imai were investigated by polycrylamide gel electrophoresis. The results showed that the esterase isozyme patterns of 10 strains isolated from different ecological environment were obviously different. The differences are mainly related to the genetic diversities and partly related to the metabolic levels of different growth period of the 10 strains.

Exergy and Evolution of Ecosystem

Zhang Yongze, Wang Xuan

1998, (5):  24-26,32. 

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The ecological meaning of the thermodynamic concept “Exergy” is discussed and the applications of the maximum exergy principle and Darwin's theory of “Survival of the fittest” in the evolution of ecosystem are explored. The study indicated that the ecosystem is to evolve to the direction, in which the exergy of ecosystem is increasing and the system will continuously select the species that can contribute most to the maintenance or even growth of the exergy of the system. The exergy has the following advantages compared with the other thermodynamic concepts: 1)It is an energy term which is easily interpreted; 2)Exergy is easily computed in the model;3)It is directly related to Darwin's theory and the application of exergy has therefore an ecological interpretation; and 4)It is dependent on the environment but is not a variable state as entropy. These advantages make the exergy to be better used in ecology.

On the Biomanipulation, Trophic Cascade Interactions and Top-down Forces

Qiu Dongru, Wu Zhenbin

1998, (5):  27-32. 

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This paper deals with similarities and difference of the three concepts, biomanipulation, trophic cascade interactions and top-down forces, proposed by various authors. All of them emphasize the effects of predation and the nexus of Daphnia for the control of algae populations. Biomanipulation aims to manipulating the food web to improve water quality, i.e., the reduction of algae. Trophic cascade theory seeks to explain the within- and among-lake variability in basic primary production process, Top-down and bottom-up model predicts that maximum attainable biomass is determined by(bottom-up)nutrient availabity, and realizes that biomass is determined by the combined effects of top-down and bottom-up forces. The common approaches of biomanipulation are to stock piscivorous fishes, remove the plankitivorous and benthivorous fishes etc. in order to stimulate growth of the populations of large sized herbivorous cladocerans with high efficiency. The advance in this area is also reviewed.

Indexes of Vegetation-Climate Classificateon and its Applications

Ni Jian

1998, (5):  33-44. 

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Vegetation-climate interaction is an old topic,but it becomes the most fundamental and vigorous researches for global change study at present.The principles,metyods,applications,advantages and weakness of the classification indexes of single factor or multi-factors assembled simply such as Koppen,Box indexes,and the indexes synthetically based on the concept of potential evapotranspiration such as Penman, Thornthwaite,Holdridge,Budyko,Kira indexes etc.,were discussed, The multitudinous schemes of vegetation-climate classification based upon the indexes in cluding Holdridge,Uvardy,Matthews,Olson,Bailey,Woodward, Prentice and Box schemes werealso discussed. These indexes and programs of vegetation-climate classification can establish some good bases for the present vegetation-climate interaction studies,global change and its impact on terrestrial ecosystems,and prediction of potential vegetation under increasing atmospheric CO₂.

An Approach to the Mechanism of Plant Compensation

Yuan Baozhong, Wang Jing, Zhao Songling, Sun Jie

1998, (5):  45-49. 

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Either in nature systems or in agricultural systems,plant species have various compensatory responses after herbivore feeding, including damage compensation, undercompensation, equalcompensation and over compensation. This review discussed the plant compensatory mechanisms from three aspects of morphology, physiology, biochemistry and evolution as well as from different levels of individual and community.

Review of Studies on forest dynamics

An Shuqing, Zhang Jiuhai, Tan Jiankang, Li Guoqi, Chen Xinglong, Zhu Xuelei

1998, (5):  50-58. 

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Theories, mechanisms, research methods and models of forest dynamics, soil change, physiological change of the species during dynamic process, effects of competition and disturbance on dynamic process and pattern are reviewed in detail. Some new ideas to develop the forest dynamics studies are suggested.

Research of Benefits in Developing Suburb Recreation_An Example of the Gaowan Economic Zone

Zhao Yi, Chen Wei

1998, (5):  59-62. 

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Using data of American tourism bureau, the paper points out that effective population in affected zone of recreation area decides tourist number. A new formula for calculating tourist number was raised and an example was calculated. Shenyang and Tieling are the big cities in affective zone of Gaowan economic zone, Fushun city. By the new formula, the tourist number of the Gaowan was counted and environmental capacity and recreation benefits of the area were calculated. The counted results can be used for the local tourism plan.

On Ecolological Planning of Urban Landscap

Li Tuansheng, Shi Tiemao

1998, (5):  63-67. 

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Ecological planning of urban landscape includes planning of environmentally sensitive areas and planning of green ecological spaces. The objectives of the planning are to reach security, health, convenience and comfort in social, ecological and economical ones. The principles of protection of environmentally sensitive areas, diversity and sustainability should be adhered to in planning. The relations between ecological planning of urban landscape and relative regulations are discussed.

On Competition of Bisexual and Parthenogenetic Striains of Artemia

Xie Qiuling, Zhang Runsheng, Guo Yong

1998, (5):  68-70. 

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Each of Artemia in Zhangbei,China(Z)and A. franciscana(F)was mixcultured with A. parthenogenetica(T)of Tianjin in media of 100% and 230%, respectively. In 230%, dioecious strains are superior to parthenogenetic strain, The variance between the competition of F with T and Z with T is not significant.

Relationship between Leaf Appearance on Main Stem of Rice and Temperature

Zhu Defeng, Zhang Xiufu, Xu Li, Fei Huilin

1998, (5):  71-73. 

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In order to study the rate of leaf appearance on main stem of rice,the experiments were conducted with 3 varieties and 8 sowing dates. The results showed that leaf number on main stem was closely related to the days to heading. Equations for different varieties were derived by fitting relation of the number of leaf on main stem to effective temperature sum. There was the different rate of leaf appearance among leaf positions on main stem.

Meta-analysis and its Application in Ecology

Peng Shaolin, Tang Xiaoyan

1998, (5):  74-79. 

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The development of meta-analysis and its application in ecology are summarized in the paper. An example is used to illustrate the analysing processes of two main meta-analysis methodes. The role of meta-analysis in ecology is also discussed.