本文選題：未名湖　切入點：水質(zhì)　出處：《北京大學(xué)學(xué)報(自然科學(xué)版)》2017年06期

【摘要】：通過測定不同季節(jié)北京大學(xué)未名湖不同區(qū)域的水質(zhì)指標(biāo),發(fā)現(xiàn)在無顯著人為外源影響的條件下,水體氮相關(guān)指標(biāo)較好,四季全部采樣點的氨氮都優(yōu)于Ⅱ類水指標(biāo),總氮都優(yōu)于Ⅳ類水指標(biāo),但COD,TP和DO等指標(biāo)在有的采樣點僅達(dá)到、甚至劣于Ⅴ類。未名湖的平均綜合營養(yǎng)狀態(tài)指數(shù)(TLI)為56.1,屬于輕度富營養(yǎng)化。利用PCR-DGGE分析未名湖的底泥微生物群落,結(jié)果表明其多樣性隨季節(jié)變化較明顯,春、秋季多樣性指數(shù)都較高,夏、秋季多樣性指數(shù)與地理位置及水體營養(yǎng)鹽含量呈顯著正相關(guān)關(guān)系。線性回歸結(jié)果提示未名湖底泥微生物群落可能受藻類固氮作用的影響。
[Abstract]:By measuring the water quality indexes in different areas of Weiming Lake of Peking University in different seasons, it was found that the related indexes of water nitrogen were better under the condition of no significant artificial exogenous influence, and the ammonia nitrogen of all sampling sites in the four seasons was better than that of class 鈪，

本文編號：1655828