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青藏高原植被过渡区的树木年轮气候学及生态学研究.docx

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青藏高原植被过渡区的树木年轮气候学及生态学研究 摘要 青藏高原植被过渡带是世界上最重要的陆地生态系统之一，其生态系统服务对全球气候变化具有重要影响。本论文综述了青藏高原植被过渡区树木年轮气候学及生态学研究的现状和进展，并对以后的研究方向提出了建议。研究表明，青藏高原植被过渡区树木年轮可以作为一种重要的气候学资料来确定气候变化的历史，同时也提供了估算树木生长和生态环境变化的指标。未来的研究应当更加注重综合利用各种气候学资料，探索不同时空尺度下植物生长与气候变化之间的关系，加强对过渡带生态系统演化的跨学科研究。 关键词：青藏高原、植被过渡带、树木年轮、气候变化、生态学研究 Introduction ThevegetationtransitionzoneontheTibetanPlateauisoneofthemostimportantlandecosystemsintheworld,wherecomplexinteractionsbetweentheatmosphere,hydrosphere,biosphere,andlithospheretakeplace.Climatechangehasasignificantimpactontheecosystemservicesprovidedbytheplateau,includingwatersupply,biodiversityconservation,andpovertyalleviation.Understandingthedynamicsofthisecosystemisthuscrucialforsustainabledevelopment. Asoneofthemostimportantproxiesavailableforreconstructinghistoricalclimateandecologicalchanges,tree-ringdatahavebeenwidelyusedinecologicalandpalaeoclimaticstudies.Tree-ringgrowthdependsonmanyenvironmentalfactors,suchastemperature,precipitation,andsoilmoisture,andcanthusprovideavaluabletoolforunderstandingthepatternsanddriversofecosystemchangeontheplateau. Thispaperreviewstherecentadvancesintree-ringclimateandecologicalstudiesinthevegetationtransitionzoneoftheTibetanPlateauandprovidessuggestionsforfutureresearchdirections. Historyofresearchontree-ringstudiesinthevegetationtransitionzoneoftheTibetanPlateau AlthoughthevegetationtransitionzoneoftheTibetanPlateauhasreceivedincreasingattentionduringrecentdecades,studiesontree-ringanalysisinthisregionwereonlyinitiatedrelativelyrecently.Untilthelate1980s,mostdendrochronologicalstudiesinChinawerefocusedonthetemperateandsubtropicalforestsintheeasternpartofthecountry.However,inthepast30years,substantialprogresshasbeenmadeinthestudyoftree-ringecologyandclimateintheTibetanPlateauregion(Fig.1). Fig.1Thedistributionoftree-ringresearchinChinafrom1990to2019(Wangetal.2021) Sincetheearly1990s,theInstituteofTibetanPlateauResearch(ITP)andotherresearchinstitutionsinChinahaveconductedextensivestudiesonecologicalandclimaticchangesinthevegetatio