45287.農(nóng)林交錯(cuò)帶生物多樣性特征分析

1、學(xué)校代碼t!照嫂分類號(hào)：P9⑧東拈埽菌失莩碩士學(xué)位論文Y887S78研究生學(xué)號(hào)z!蝗Q蝗嫂絲121密級(jí)。玉農(nóng)林交錯(cuò)帶生物多樣性特征分析Theanalysisofbiodiversi鑼characteristicinfarming—forestryecotone作者：壬暮垂指導(dǎo)教師：許l■學(xué)科專業(yè)：自然地理學(xué)研究方向：續(xù)舍自然地理和量魂生態(tài)學(xué)學(xué)位類型：學(xué)歷爵士東北師范大學(xué)學(xué)位評(píng)定委員會(huì)2006年5月AbstractIntmsp即er’Ic

2、hooseDaheiMoumainw11ichis0ntheleftofShuangyangbasinasme『cgiDnofrcse盯ch，anditLiesintllef冊ing—forestryecotonetheso訂isdarkTbrownforestsDil，thetypeoflalldscapeissecondaryf出est；bothsidesaredarksoil，thetypeoflaIldscapeis缸Tning

3、1andsc印eTheyareWbedcommuIlity、bmshcomm吼ity、Quercusmongolicacomm塒ty、QuercuSmorlgolicaBetuladavuricaPallcommullity、broadleavedcDmmuni啦atmes鋤etimeJakell暑【darangewhereison廿leeastofshuangy齜lgbasinforcomparison，tllroughsamplin

4、gsurveyanddataprocessingbysonwareExcel2000姐dSpssllOaccordir培tothedi＆renttypesofcoIIunllllitiesaIlddi懿r鈕ts廿uctureoflayerinmeco衄訶tiesmaki]唱comparisons髓d啦lysisof也eappearancecharaHer，Ⅱ一diVershyindexandB—diverSityindexofplant

5、coInmllnityIntheecotonea11dunecotoneA塒ysisofappearancecharacter，QorBdiversity協(xié)dexofplantconununitiesshowsthat：biodiversityofforestcommllIIitiesinbomtheDaheiMourI_taininecotonearIdhada加gedemonstratescertaindispari母thatbio

6、diVersityofDaheiMountainisfe、憎th肌oneofHadarallgeButduriIlgthedi丘brentstagesofcommuIlitiessuccession，di丘brencesofbio—diversityarenotmes鋤eWben協(xié)estageofsucccssionis、ⅣeedcommuIlity，thedi艇renceisin武出m啪；withtheprocessingofsucc

7、essi吣thedi虢renceis靜adllallyincre鵝ed；whenthestageofsuccessionisbmadleavedcommllIlity，thedi施renceisinma)【im砌Suchdi行erencesarcalsenectedinthetlledi丘宅rem1ayersofco蛐u血ties，thatistosay，withnleprocessillgofsuccession，similariti

8、esofeachlayerisgraduallyweakenedthereasOnsfordi丘brencesofbiodiversitych盯acteristics訪cludenaturalfktorsa11dhllInandi姍bance0none11and，l蛆dscapeheterogeneityofimerlockzonepreVent舳mmespreadofmespecies，thusa疵ctingvegetationres

9、t()rationofimerlockzone；ontheothcrhand，‰an式st瑚島anc號(hào)intheinterlockzoneisrelaivestrongerwitbtheprocessingofsuccessioll，diff打eⅡcesofbiodivers時(shí)characteristicsareaccelcratedkeywords：fhmlitlgforestryecotone；biodiVersi可ch弧cteri