【摘要】：利用Illumina平臺(tái)高通量測(cè)序技術(shù),分析了鄱陽(yáng)湖4大河流(信江XS,饒河RS,修河SS,贛江GS)河口底泥微生物群落結(jié)構(gòu)和多樣性對(duì)底泥重金屬污染的響應(yīng)情況.結(jié)果表明,在測(cè)試的6種重金屬離子中,Cu、Zn全量和有效態(tài)表現(xiàn)為RS、XS顯著高于SS、GS,Mn全量和有效態(tài)在GS中顯著最高,Pb有效態(tài)在XS顯著最高,Pb全量、Cd全量和有效態(tài)、Cr全量和有效態(tài)在4條河流中無(wú)顯著差異;經(jīng)檢測(cè),鄱陽(yáng)湖4河口底泥微生物群落主要有5大類(lèi),它們分別是:變形菌門(mén)(Proteobacteria)(32.54%~50.35%),酸桿菌門(mén)(Acidobacteria)(6.13%~13.13%),擬桿菌(Bacteroidetes)(4.38%~14.92%),疣微菌門(mén)(Verrucomicrobia)(6.42%~10.70%)和綠灣菌門(mén)(Chloroflexi)(3.21%~11.73%).多樣性指數(shù)結(jié)果表明:GS、SS微生物多樣性指數(shù)(Chao1和Shannon)高于RS,與重金屬含量成反相關(guān).相關(guān)性分析表明:重金屬Cu、Zn、Cd、Pb、Cr、Mn和138個(gè)主要OTU顯著相關(guān),其中Cu、Cd和微生物門(mén)、屬顯著相關(guān)的OTU數(shù)量最多.變形菌門(mén)中有9個(gè)屬和Cu有效量,5個(gè)屬和Cd有效量顯著正相關(guān),這些正相關(guān)的菌群是土壤重金屬污染修復(fù)的重要微生物種質(zhì)資源.
[Abstract]:High throughput sequencing technique based on Illumina platform was used to analyze the response of microbial community structure and diversity to heavy metal pollution in sediment of four major rivers of Poyang Lake (RS, SS, GS) in Poyang Lake. The results showed that the total and available states of Cu,Zn were significantly higher than that of SS,GS,Mn in GS, and the Pb available state was the highest in XS, and the total amount of Pb was significantly higher than that of SS,GS,Mn in the six kinds of heavy metal ions tested. There was no significant difference between the total and available states of Cd and the total and available states of Cr in four rivers. The results showed that there were five main types of microbial communities in sediment of the four estuaries of Poyang Lake. They were: (Proteobacteria) (32.54 and 50.35%, (Acidobacteria) (6.1313%). (Bacteroidetes) (4.38%), (Verrucomicrobia) (6.42% (10.70%) and (Chloroflexi) (3.21 (11.73%). The results of diversity index showed that the microbial diversity index (Chao1 and Shannon) of GS,SS was higher than that of RS,. Correlation analysis showed that there was significant correlation between heavy metal Cu,Zn,Cd,Pb,Cr,Mn and 138 major OTU, among which Cu,Cd and microbial phylum were the most significant OTU. There were 9 genera and Cu available quantities in the phylum of Proteus and 5 genera were positively correlated with Cd. These positive correlation flora were important microbial germplasm resources for heavy metal pollution remediation in soil.
【作者單位】： 江西師范大學(xué)鄱陽(yáng)湖濕地與流域研究教育部重點(diǎn)實(shí)驗(yàn)室江西省亞熱帶植物資源保護(hù)與利用重點(diǎn)實(shí)驗(yàn)室;流域生態(tài)與地理環(huán)境監(jiān)測(cè)國(guó)家測(cè)繪地理信息局重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(41061037,31460147,41461042) 江西省青年科學(xué)家(20142BCB23010) 鄱陽(yáng)湖濕地與流域研究教育部重點(diǎn)實(shí)驗(yàn)室主任基金(ZK2013007,ZK2013001) 流域生態(tài)與地理環(huán)境監(jiān)測(cè)國(guó)家測(cè)繪地理信息局重點(diǎn)實(shí)驗(yàn)室開(kāi)放課題資助(WE2016010)
【分類(lèi)號(hào)】：X172;X524

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