Xihu,Dunhuang, fire disturbance, vegetation characteristics, iInland desert wetland ecological system ,"/> <p class="MsoPlainText"> Effect of fire disturbance on reed(<i><span>Phragmites australis</span></i><span> Trin</span>)<span>community characteristics in inland desert wetland</span>
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Arid Land Geography ›› 2020, Vol. 43 ›› Issue (3): 770-776.doi: 10.12118/j.issn.1000-6060.2020.03.23

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Effect of fire disturbance on reed(Phragmites australis Trin)community characteristics in inland desert wetland

WANG Juan1,CHEN Wen-ye2,3,4,TAN Yan-rong2,3,4,WANG Duo-feng2,YUAN Hai-feng4,5,CHEN Xu4,5, WU Ting4,5,WANG Bin-jie2,3,4,BING Dan-hui2,3,4,LIU Hong-yuan2,3,4,LIU Dong-hao2,3,4   

  1. 1 China Agricultural Vet.Bio.Science and Technology co.LTD,Lanzhou 730046,Gansu,China;

    2 Gansu Forestry Science and Technology Research Academy,Lanzhou 730020,Gansu,China;

    3 Gansu Forest Science and Technology Engineering Company,Lanzhou 730020,Gansu,China;  4 National Positioning Observation Station of Xihu Wetland Ecosystem in Dunhuang of Gansu,Dunhuang 736200,Gansu,China 5 Administrative Bureau of Gansu Dunhuang Xihu National Nature Reserve,Dunhuang 736200,Gansu,China

  • Received:2019-05-22 Revised:2019-08-26 Online:2020-05-25 Published:2020-05-25

Abstract: This study discussed the response mechanism of vegetation to fire disturbance in inland desert wetlands by comparing the effect of fire disturbance on the characteristics of reed communities in the Xihu wetland, Dunhuang City,Gansu Province,China.Results revealed that fire disturbance could prolong the green period of plants and promote the individual development of vegetation.Fire disturbance had a significant negative effect on vegetation coverage and height and a significant positive effect on the density of the herbaceous layer.Furthermore,fire disturbance positively affected the coverage,height,and density of the shrub community;however,this effect is not obvious.After the fire disturbance,the ShannonWiener H′,Simpson D,and Simpson C indices of plant communities decreased,whereas the Margalef Ma and Pielou J indices increased.Moreover,the same change trends in plant community diversity indices such as H′,D,and J diversities appeared in the herbaceous layer of the reed community in the study area,whereas an opposite trend in Ma and C indices was observed.In summary,fire disturbance can reduce the total aboveground biomass of plant communities,particularly the biomass of the shrub layer,and it can increase the biomass of the herbaceous layer.

Key words: Xihu,Dunhuang')">

Xihu,Dunhuang, fire disturbance, vegetation characteristics, iInland desert wetland ecological system