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| nyenaceyg |
 Wysłany: ¦ro 23:58, 16 Lut 2011 Temat postu: Since the mid-Holocene and animal geography of the |
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Since the mid-Holocene and animal geography of the West Liaohe River Basin Environmental Changes
ad-leavedforests. ThismeansforestsplayedanimportantroleinvegetationinmiddleHoloceneinthisregion. AndinthebeginningoftheChristianEra, wildhorse (Equusprzewalskii) wasthemainlocalproduct. Thismeansthatthesteppemighthaveexpanded. ButintheMedievalera (duringthebeginningofthe10thtothebe-ginningofthe12thcenturyA.D.),Ed Hardy outlet, ThenomadicQidannationalityestablishedpowerfulLiaoDynasty. andtherewerealotofdocumentsabouttheWestLiaoheRiverBasin. Dur-ingthisperiod, theDavid'sdeer (Elaphurusdavidianus) wasrecordedbymanytravelers, buthowever, norecordofwildhorsecouldbefoundinallhistoricaldocumentsduringthisperiod. Thismeansthattheforestshadbeenexpanded. AndinthebeginningoftheQingDynasty (the17thcenturyAD), thewildhorsewasrecordedasoneofthelocalproducts. Thismeansthatthesteppecouldbeexpanded,Mont Blanc pens, andtheforestreduced. AndbeforethemidQingDynasty (the18thcenturyAD), tiger,tiffany deutschland, beerandleopardwereextensivelydistributed. However, afterthemidQingDynasty, especiallyaftertheendofthe19thcentury. tigerandleopardbecamelessandlessandcouldnotbefoundinanyhistoricaldocuments. Thechangesofanimalgeographybeforethe18thcenturyweretheresultofnaturalchanges,ghd piastre, becausethepopulationwasverysparseduringthisperiodoftime. How-ever,belstaff italia, thechangesofanimalgeographyafterthe18thcenturywereinducedbyhumanactivi-ties, becausetheagriculturalpopulationmigratedmassivelyfromtheYellowRiverBasintotheWestLiaoheRiverBasinplusrapidpopulationgrowthafterthemidQingDynasty. Thisresultedinforestreductionandsteppeexpansion. Keywords: middleholocene; Historicalperiod; WestLiaoheRiverBasin; animalgeography |
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