松嫩草甸水淹恢復(fù)演替系列群落蘆葦種群的生態(tài)可塑性研究.pdf

1、東北師范大學(xué)碩士學(xué)位論文松嫩草甸水淹恢復(fù)演替系列群落蘆葦種群的生態(tài)可塑性研究姓名：張劍申請學(xué)位級別：碩士專業(yè)：生態(tài)學(xué)指導(dǎo)教師：楊允菲20050501AbstractPhragmitescommunis，whichisatypicalclonalplantofgrassfamilywithrhizome，hasabroadecologicaladaptationThisexperimentODPhragmitescommunispopul

2、ationwasconductedonfourstandsindifferentgrowthseasonsandtheecologicalplasticityoframetsmodulewasanalyzedstatisticallyTheresultsindicated：Withtheelongationofthefloodingdurations，thereweresomedifferencesinthespatialdynamic

3、changeonPhragmitescommunispopulationcharactersandthecharacteristicsweremostlyinfluencedbytheenvironmentTherewasahighestheightonPhragmitescommunispopulationinfourthstandwithlongestfloodingdurations，andtherewerethemostdens

4、ityandbiomassinthirdstandButtheabovereachedminimumsinfirststandwithshortestfloodingdurationsThequantitativecharactersofPhragmitescommunispopulation，suchastheheight，abovegroundbiomass，biomassofstemsandleavesshowedtheincre

5、asedregulationofchangeTherewasobviouslysignificantdifferencewithinstandspO01)andsignificantdifferenceamongstands(F005)TheecologicalplasticityoframetmoduleonPhragmitescommunispopulation，wassmallervariationswithinstagestha

6、nthoseamongsages，andamongstandsthanamongstagesThereweresmallervariationswithinstandsthananaongstandsinJuneandAugust，butlargervariationsinJulyTheecologicalplasticitiesoframetsheightwerefarsmallerthanbiomasswithinstandsand

7、amongstandsthesameasthosewithinstagesandamongstagesThesensitivitydegreeinrespondtoenvironmentchangedoftherametbiomasswerefarhigherthanheightinPhragmitescommunispopulationThebiomassallocationinleaveswasdecreasedwiththehei

8、ghtincreasedinPhragmitescommunisramet，butthebiomassallocationinstemswasincreasedThebiomassallocationinstemsinfourthstandreachedmaximumoNeverygrowthperiod，whichwasrespectively4930％，5631％and6271％Thereweresmallervariationsa

9、mongpopulationsthanwithinpopulationsonthebiomassallocationinstemsandleaves，andkeptstablecomparativelyamongpopulationsThebiomassoframetmoduleonPhragmitescommunispopulationwereincreasedbypowerfunctionwiththerametheightincr

10、easedindifferentstands，andtheincreasingspeedonbiomassallocationinstemswashigherthanleavesobviouslyThedefinitivecoefficientR。offittedequationwasbetween2721％and9517％，andcorrelationcoefficieutrwasbetweenO5216andO9756Theyall