欢迎来到天天文库
浏览记录
ID:34844532
大小:8.75 MB
页数:82页
时间:2019-03-12
《桂林黄枝油杉种群生态学研究》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、plantsusuallywerefragmentizeddistribution,clumpeddistribmingonpatchspaces,thusitsspatialpatternswereaggregative.Onmeotherhand,theaggregatedextentofspatialpatternsofKeteleeriacalcarewereusuallylow,becausethepatchsinsidekarsthadanlimitedresourcestogetherwithhighdemandofecologicresourcesdut
2、ingtoKeteleeriacalcare嬲atallarborspecies,thatwithstrongcompetitivepressurewhichresultingdifficulttoformahighaggregatedspatialpattern.SpatialaSsociationsbetweenKeteleeriacalcareanditsaccompanyingtreeshadpositiveinteractionsprimarily,minorityofthemwerenosignificant.Inwelldevelopmentalcommu
3、nities,differentpopulationsdistributedandutilizatedthespaceresouresinreasonableandspecificways,whichhadastablestructureformedbylong-termcommunitydevelopmentandpopulationcompetition.Thusthespacecompetitionsweredominantbymutualismrelationships,fewexclusive,whichfurtherevidencedaSanpositive
4、interactionsdominantedspatialpatternsofinterspecies.AbovestudyresultsthatKeteleeriacalcarehadstablemutualismrelationshipswithitsaccompanyingtrees,itscommunitiesweredevelopedwellandhadarelativelystablespatialpatterns.(3)Theheights,crowndiameterandDBHsofKeteleeriacalcarewereincreaSedinapow
5、erfunctionalrelationshipthatY=aX6.Onsmallscale(QOm),theheightandcrowndiametergrowthweremorequickly,laterongrowthbecameslowingdown.ThestudyofpopulationstructureresultthattheKeteleeriacalcarepopulationineachplotsweremostlyconsistbysenilityindividuals,lackingofjuvenileindividuals,andallageg
6、roups’individualsweredestituteorinterruptiveinvaryingdegrees.ThestudyofDBHsstructureresultthatstructureinallplotsweresenescentandevenoppositepyramidorresidualinserioussenescent,exceptthatstructureofplotQ8werestabilized.Thecomputationofdifferentiationindicesindicatedthatheight,crowndiamet
7、erandDBHofallplotshadadifferentiationindicesbetween0and0.2.Thedifferentiationhadalowdegree,becauseitspopulationshadavaryingdegreesdeletioninavaryingagegroups,especiallythebottomjuvenileindividualsandthetopsenilityindividualswhichresultofasimplificationalpopulationstructur
此文档下载收益归作者所有