DrCayelanCarey
所属公司：DepartmentofBiologicalSciences，VirginiaTech，USA
公司职位：
所在地区：
创业领域：能源
所属公司：DepartmentofBiologicalSciences，VirginiaTech，USA
公司职位：
所在地区：
创业领域：能源
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.
