閩江口互花米草濕地甲烷與二氧化碳通量研究.pdf

1、福建師范大學(xué)鄂焱碩士論文中文摘要濕地生態(tài)系統(tǒng)溫室氣體的排放及其對(duì)環(huán)境的影響越來越受到人們的重視。閩江口濕地是我國東南沿海重要的天然濕地之一，其溫室氣體排放通量是我國濕地溫室氣體排放清單中重要組成部分?；セ撞?Spartinaalterniflora)作為閩江口濕地的入侵物種，近幾年不斷擴(kuò)張蔓延。本文首次揭示了閩江口鱔魚灘互花米草濕地漲潮前、漲落潮過程中以及落潮后3個(gè)不同階段連續(xù)兩年的甲烷和二氧化碳排放通量特征，同時(shí)分析了影響甲烷、二氧

2、化碳排放的主要環(huán)境因子，結(jié)果顯示溫度對(duì)甲烷、二氧化碳排放的影響伴隨著整個(gè)潮汐過程；通過原位添加甲烷氧化抑制劑(乙炔)的試驗(yàn)，發(fā)現(xiàn)互花米草濕地土壤夏季的甲烷氧化率高于冬季，有植被生長的試驗(yàn)樣地高于無植被生長的試驗(yàn)樣地；通過使用溫室氣體增溫潛勢(shì)(GwP)以及年平均甲烷和二氧化碳的排放量，綜合分析了閩江口互花米草濕地以上兩種氣體的溫室效應(yīng)。關(guān)鍵詞：互花米草，甲烷通量，二氧化碳通量，環(huán)境因子，IL‘■rLL■ll：●，t福建師范大學(xué)鄂焱碩士學(xué)位

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6、nimpactfactorswerealsoanalyzedTheresultshowedthattheeffectsoftemperatureonmethaneandcarbondioxidefluxesaccompanyedwiththewholetidalMethaneoxidationinthesoilofSpartinaalterniflorastandwasquantifiedusingmethaneoxidationinh

7、ibitors(acetylene)，theexperimentgottwoconclusions：methaneoxidationrateinsummerWashigherthanthatinwinter；methaneoxidationrateunderthesoilsunderSpartinaalterniflorawashigherthanthatnoSpartinaalternifloraGreenhouseeffectofm