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Table of Content
    Volume 04 Issue 3
    20 August 1996
      
    论文
    Status of genetic diversity and conservation strategy of Pere David's deer in China
    Yu Changqing
    Biodiv Sci. 1996, 04 (3):  130-134.  doi:10.17520/biods.1996023
    Abstract ( 2743 )   PDF (146KB) ( 2735 )   Save
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    The paper explores the extinction of wild population, history and population growth in captivity, and the status of genetic diversity for Pere David's deer. The results show that Pere David's deer was extinct in China in the end of 19th century mainly because of hunting and loss of habitat. Inbreeding depression in the viability and sex ratio occurred in the early days since the deer were introduced into Europe. The gathering and releasing of the deer into the vast Woburn Park made the social behavior fully expressed and the population grew rapidly and strengthened the capacity to tolerate inbreeding. Now there are about 500 Pere David's deer in China. The reintroduced Pere David's deer in Dafeng reserve have adapted to the seminatural condition very well both in feeding and reproduction, and the effective population size is about 26 with the loss of heterozygosity about 30% of the wild population. It is suggested that new farms and more natural population experiments have to be established for conserving the genetic diversity of the deer.
    A preliminary study on the conservative status of Sinojackia dolichocarpa
    Ye Qigang, Wang Shiyun, Xu Huizhu, Wang Chang
    Biodiv Sci. 1996, 04 (3):  135-138.  doi:10.17520/biods.1996024
    Abstract ( 2848 )   PDF (134KB) ( 2580 )   Save
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    Sinojackia dolichocarpa, which had been found in Shimen and Shangzhi County, Hunan Province, is the second-category state-protected endangered plant in China. In this paper, the status of it in situ conservation is studied including natural environment, the distribution, the size class structure type of its populations, the quantity, destruction, conservation and management. In addition, as a result of a preliminary study on its ex situ conservation in Wuhan Institute of Botany, its propagating methods, biological characteristics, in vitro, potentialities of exploitaiton and utilization and so on are expounded. In the end, some advice on how to conserve the germplasm resourse effectively is given.
    The species and distribution of seaweeds in the coast of China seas
    Zhang Shuijin
    Biodiv Sci. 1996, 04 (3):  139-144.  doi:10.17520/biods.1996025
    Abstract ( 3268 )   PDF (147KB) ( 3520 )   Save
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     So far,835 species of seaweeds has been recorded in the coast of China.In this paper,the characters of seaweeds flora in China seas and their relations are analysed and compared according to the species composition,temperature nature peculiar genus distribution and the similarities in genus-level among the seas.The effects of environmental factors such as temperature,currents and geographic conditions to the seaweeds distribution are discussed.
    Status and conservation strategy of the Yunnan snub-nosed monkey
    Long Yongcheng, Craig Kirkpatrick, Zhong Tai, Xiao Li
    Biodiv Sci. 1996, 04 (3):  145-152.  doi:10.17520/biods.1996026
    Abstract ( 2887 )   PDF (155KB) ( 3450 )   Save
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    The Yunnan snub-nosed monkey (Rhinopithecus bieti), is one of the most  endangered animal species endemic to China. The monkey is definitely associated with fir forest. Most monkey groups live at elevations of 3800~4300 m, and they sometimes can go up to a few hundred meters above tree line (4700 m alt.) and cross wide alpine meadow or heath patches on top of snow mountain, so that the species is the nonhuman primate species that was found at highest elevations. Its main food is the lichen (Bryoria nepalensis), an epiphyte on fir and other alpine trees, and 91% of its feeding time is spent on the lichen. Its  home range may be over 100 km2.  After eight years' field survey, the total population of the species has been estimated to be 1000~1500 individuals spread in 13 natural groups distributed in one county in Tibet (Mangkang), and four counties in Yunnan (Deqin, Lanping, Weixi, and Lijiang). All these groups were isolated due to fragmentation of its habitat, therefore, it is impossible for the gene exchange among those groups or populations. Although it has been in the list of the first class protected animals of China for almost 20 years, its survival future is not optimistic. In fact, its habitat is being lost quickly due to the commercial logging and sharply increased human population in the area, and its population is being decreased rapidly by poachers. Further conservation action on this precious animal (including protect all the natural groups of the species) should be implemented as soon as possible. In this paper, conservation status of each of the natural groups has been presented and discussed; a detailed conservation consideration for all the natural group of the species has been proposed.
    Genetic diversity and multilocus structure in forest trees
    Yi Nengjun, Shi Jisen, Wang Mingxiu
    Biodiv Sci. 1996, 04 (3):  153-159.  doi:10.17520/biods.1996027
    Abstract ( 2330 )   PDF (217KB) ( 2237 )   Save
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    The main methods to characterize population genetic structure at isozyme loci and their applications in forest  trees  were  reviewed.The population genetic structure can be characterized by two  sets  of measurable parameters: single-locus measures and  multilocus  measures.These two sets of parameters and the  relationship  between  them  are  discussed.   The  contribution  of  multilocus  associations  to  the development of population genetic structure and  its  implication  for genetic conservation and breeding are elucidated.
    A survey of the current status of wild rice in China
    Gao Lizhi, Zhang Shouzhou, Zhou Yi, Ge Song, Hong Deyuan
    Biodiv Sci. 1996, 04 (3):  160-166.  doi:10.17520/biods.1996028
    Abstract ( 2479 )   PDF (153KB) ( 2673 )   Save
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    Abstract  There are three species of wild rice,which are wild relatives of the cultivated rice and listed in endangered plant species in China[7].They are distributed  in  humid  areas  of  tropical  and subtropical regions in eight provinces of southern  China. Recently,human disturbance and  destruction  of  habitats  have  led  to  the  extinction of a great number of populations,of which Oryza rufipogon Griff.  is  the  most  endangered  species.   In  this  paper,their  biological and ecological characteristics  were  described  and  the  plant communities were also studied.   Meanwhile, the  endangered status and the   reasons  of  wild rice  in  China were  discussed.
    Influences of traditional fishing on the mangrove fisheries and management countermeasures in Yingluo Bay, Guangxi Province
    Fan Hangqing, He Binyuan, Wei Shouqing
    Biodiv Sci. 1996, 04 (3):  167-174.  doi:10.17520/biods.1996029
    Abstract ( 2478 )   PDF (160KB) ( 2838 )   Save
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    Abstract  Benthic macrofauna and nektons used to be abundant on the tidal flats and mangrove exposed tidal waters in the mangrove zone of Yingluo Bay,Guangxi.However,their amounts decreased by about 60% and 80% respectively in the past four years.This was directly caused by human uncontrolled collection of the species that have increasing commercial values at the markets.The methods of collection included digging macrobenthos on tidal flats,netting,bombing and poisoning fish in mangrove exposed tidal waters and water ways.The mesh size of the nets was usually as small as 0.25 cm.These traditional fishing activities extremely decreased the flow of matter and energy among the mangrove food web,fragmented animal habitats,and endangered the survival of populations.The mangrove fishery was whatever vital for the local residents,thus entire close of the mangrove tidal flat for conservation is impossible at present. So,a technique of turn flat closed nursery was suggested for the management of the mangrove tidal flats in Yingluo mangrove area. Meanwhile, enhance of public education was also recommended.
    Discussion on the future conservation problems
    Biodiv Sci. 1996, 04 (3):  183-186. 
    Abstract ( 1873 )   PDF (128KB) ( 2512 )   Save
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