DrCayelanCarey

所属公司：DepartmentofBiologicalSciences，VirginiaTech，USA

职业信息：

创业领域：能源

DrCayelanCarey的个人简介

Experimentalcyanobacterialbloomscanincreasethebiomass，richness，diversity，andstabilityoftheeukaryoticphytoplanktoncommunityCyanobacterialbloomsareincreasinggloballyinmanyfreshwaterlakes，botheutrophicandoligotrophic.Freshwatercyanobacteriagenerallyhavenegativeeffectsoneukaryoticphytoplanktonineutrophiclakesbecauseoftheirabilitytoformdensesurfacescumsthatreducelightavailability.However，lessisknownabouttheeffectsofcyanobacteriaonotherphytoplanktoninoligotrophiclakes.WeconductedseveralexperimentsmanipulatingthedensityofGloeotrichiaechinulata，alargecolonialcyanobacteriumthatisincreasinglyobservedinlow-nutrientlakesinthenortheasternUnitedStatesandCanada.Inlow-nutrientmesocosms，Gloeotrichiaincreasedthebiomass，richness，anddiversityofotherphytoplankton，likelybecauseitincreasednitrogenandphosphorusconcentrationsinthemesocosms.Interestingly，wealsoobservedthatGloeotrichiastabilizedthecompositionoftheeukaryoticphytoplanktoncommunity:theno-Gloeotrichiacontroltreatmentexhibitedgreatermultivariatedispersionovertimethananyofthe+Gloeotrichiatreatments.AsthedensityofGloeotrichiaincreased，itscontributiontothevarianceofthephytoplanktoncommunityalsoincreased.NetworkanalysisshowedthattheincreasinginfluenceofGloeotrichiacoincidedwithincreasingcomplexityofthephytoplanktoncommunity.However，inhigh-nutrientmesocosms，Gloeotrichiainhibitedotherphytoplankton，suggestingthatGloeotrichia’sfacilitationeffectsmaybecontext-dependent.Ascyanobacterialbloomscontinuetoincreaseinmanylakes，itiscriticallyimportantthatwedeterminehowtheeukaryoticphytoplanktoncommunitieswillrespond.

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