学科分类
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1 个结果
  • 简介:Anexperimentwasdesignedtoselecteconomicallyvaluablemacroalgaspecieswithhighnutrientuptakerates.Suchspeciesculturedonalargescalecouldbeapotentialsolutiontoeutrophication.Threemacroalgaespecies,Ulvapertusa(Chlorophyta),Gelidiumamansii(Rhodophyta)andSargassumenerve(Phaeophyta),werechosenfortheexperimentbecauseoftheireconomicvaluesandavailability.ControlandfournitrogenconcentrationswereachievedbyaddingNH4andNO3.Theresultsindicatethatthefreshweightsofallspeciesincreasefasterthanthatofcontrolafter5dculture.ThefreshweightofUlvapertusaincreasesfastestamongthe3species.However,differentspeciesshowdifferentresponsestonitrogensourceanditsavailability.TheyalsoshowtheadvantageofusingNH+4thanusingNO-3.U.Pertusagrowsbestandshowshighercapabilityofremovingnitrogenat200μmolL-1,butithaslowereconomicalvalue.G.Amansiihashighereconomicalvaluebutlowercapabilityofremovingnitrogenat200μmolL-1.ThecapabilityofnitrogenassimilationofS.EnerveishigherthanthatofG.Amansiiat200μmolL-1,buttheformer'sincreaseoffreshweightislowerthanthoseofothertwospecies.Thenpresentpreliminarystudydemonstratesthatitispossibletousemacroalgaeasbiofiltersandfurtherdevelopmentofthisapproachcouldprovidebiologicallyvaluableinformationonthesource,fate,andtransportofNinmarineecosystems.Cautionisneededshouldweextrapolatethesefindingstonaturalenvironments.

  • 标签: 海洋藻类 石莼 种类 营养利用率 超营养作用 氮利用率