重庆地区野生春兰（Cymbidium+goeringii）的种群分布、群落特征与形态结构分化分析

《重庆地区野生春兰（Cymbidium+goeringii）的种群分布、群落特征与形态结构分化分析》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、曲南大宁坝十字何论又AbstraetStudiesonpopulationdistribution，comm—unityfeaturesandexternalmorphologicalaswellasanatomical．differentiationsofwildCymbidiumgoeringiiinChongqingDiscipline：BotanyPostgraduate：LuoTaoSupervisor：Prof．dr．HePingAbstracthordertomakeclearthepresentsurvivalsituation,toexploretheadaptingmech

2、anismandtodiscussestheprotectionstrategyandsustainableusageofCymbidiumgoeringfi,westudiedthepopulationdistribution，communityfeatures，externalmorphologicalaswellasanatomicaldifferentiationsofwfldC．goeringiiinChongqing．WildpopulationsofC．goer／ng／／inDabaMountainandWulingMountainandtheirsurroundingareas

3、arestudied．SamplinglocationsincludeChengkoucounty(Houping，Lantian，Dong’an)．WuxiCounty(10ng’an、Liping、Oingzhuan、Baiguo、Linkouzi、ShengliandFenghuang)，FengjieCounty(Xingione"Difeng)、WulongCounty(ZhongxinTemple)、andOianjiangcounty(Zhengyang)．ThestudyincludesfollowingaspectsofthewildC．goeringiiinChongqin

4、g：1)populationsizeandspatialdistributionpattern；∞externalmorphologicaldifferentiationatthepopulationlevelandtheindividuallevel，3)thespeciescompositionandquantitativeclassificationofthecommunitieswherethisspeciespopulated；钔theanatomicalstructuredifferentiationbetweenpopulations．Thefollowingconclusion

5、sweredl'awn：1)Populationdistribution：C．goeringiiCallbedistributedinnaturalforests∞wellasinartificialforests．Nineof14populations(64．3％、werefoundinartificialforests．FivePopulationswiththehighestpopulationdensitiesateallfoundintheartificialcommunities．Thismayduetosamplingerror，asoneplotwhichisconvenien

6、tandeasytoinvestigateisgenerallytheartificialcommunity．Honeplothasmediumartificialinterference．itsshrubandherblayersatecertainlymucheasiertobeharvestedbyfarmers，whichwillalsoindirectlyenhancecompetitivenessⅢ两南大学硕士学侍论文AbstractofC．goeringiiinthecommunitiesandthespecieswillbemoreeasilytogetadvantageous

7、positionincompetitionintheartificialcommunitiesthaninthenaturalones．PopulationdensitiesofC．goeringiiwerecorrelatedwithbothFagaceaetreedensitiesandcoverageoftheshrubandhcIblayerofcommunities．Fagaceaetr