| The comparison of plant diversity between the national Yancheng rare birds natural reserve of Jiangsu (abbreviation:the Yancheng reserve) and the national Yellow River of Xinxiang birds natural reserve of Henan (abbreviation:the Xinxiang reserve) was studied,using methods of sampling surveys,specimen collecting and handling,habitat Fig. shooting,location trample and investigation,etc.The results were as follows:1)The Yancheng reserve had 108 families,315 genera and 512 species,while the Xinxiang reserve had 81 families,256 genera and 394 species,with coefficient of similarity was 69.29.The two reserves both had 5 national protection of wild plants.Large families,single specie families and 2~5-specie families were very widely distributed and occupied an important position in the two reverses.Herbs accounted for the absolute superiority in the two reserves2)The Yangcheng reserve had 15 area types and 14 variant types,while the Xinxiang reserve have 14 area types and 11 variant types.The two reserves clearly showed the obvious pan-tropical flora,followed by the north temperate flora.The flora of the Yancheng reserve and the Xinxiang reserve had high affinity,high composition of consistency of flora,and should belong to the same ancient flora evolved.3)The Yancheng reserve and Xinxiang reserve had 19 and 16 plant communities between the two reserves respectively,in which there was 5 common plant communities,whose similarity coefficient of the communities was 28.57.By comparing IV value of plant communities and plant diversity indexes of R,D,H,Jsw,Jsi,E between the two reserves,the Yancheng reserve had higher plant diversity than the Xinxiang one;IV value showed that plant species on ecological importance and the status of plant communities of the two reserves were uniform;R,D and H in the characterization of the plant diversity had basically the same trend and achieve the same effects; Jsw,Jsi,E expressed the similar result. 4)There were 54 families,99 genera and 114 species of medicinal plant resources in the Yancheng reserve,while 47 families,95 genera and 108 species of medicinal plant resources in the Xinxiang reserve,in which there was 80 common invasive plants,whose coefficient of similarity is 72.07.In the two reserves,there were a great quantity of potential rescource plants,including forage plant,food plant,fiber plant,aromatic plant,oil plant,ornamental plant.There were 43 halophytes in the Yancheng reserve and 40 halophytes in the Xinxiang reserve,in which there was 28 common halophytes,whose coefficient of similarity was 67.47.At the same time,there were 17 invasive plants in the Yancheng reserve and 18 invasive plants in the Xinxiang reserve,in which there was 12 common invasive plants,whose coefficient of similarity was 68.57.5)Both Yancheng and Xinxiang reserves were high in primitive taxa,but the former had more in quantity and appeared to be more ancestral.Furthermore,community succession and vegetation distribution of the former were more regular,while the latter were more influenced by artificial factors.6)In the two reserves,the sum of IV ratio of halophytes was 21.49;the total ratio frequency of halophytes was 5.42; the total ratio frequency of halophytes,enduring high and moderate salt soil,was 28.84.The distribution of halophytes in the Yancheng reserve was very wide,especially enduring high and moderate salt soil ones,while the distribution of ones in the Xinxiang reserve was very limited.7)Different distribution of vascular plants,plant communities,potential resource plants, halophytes and invasive plants were determined by different moisture,salinity,climate and other ecological environment of the two reserves.Threrfore,there were great differences in the vegetation distribution of the Yancheng reserve and the Xinxiang reserve.
|
PDF Full Text Request