發(fā)布時間：2018-03-21 02:37

  本文選題：泥炭地　切入點：水位重建　出處：《東北師范大學》2015年碩士論文　論文類型：學位論文

【摘要】：泥炭沼澤古水位是以泥炭作為信息載體研究古環(huán)境的重要參數(shù),但關(guān)于泥炭地古水位的定量研究近年才興起。大興安嶺是我國貧營養(yǎng)型泥炭地主要分布區(qū),對環(huán)境變化敏感,適合研究古水位的變化。在貧營養(yǎng)型泥炭地中,有殼變形蟲對濕度反應迅速,這個特性使其成為古水位變化常用的生物代用指標�；诂F(xiàn)有研究基礎(chǔ),我們應用中國東北地區(qū)泥炭地有殼變形蟲——水位轉(zhuǎn)換函數(shù)模型定量重建了大興安嶺三個泥炭剖面的古水位,并將重建結(jié)果與氣象數(shù)據(jù)進行相關(guān)性分析,驗證有殼變形蟲指標的適用性。本次研究樣品經(jīng)鏡下鑒定后共鑒定出有殼變形蟲48種,其中出現(xiàn)了我國從未報道過的新紀錄種Archerella flavum和新紀錄屬Placocista(包括Placocista spinosa和Placocista glabra兩個種)。我們對三個泥炭剖面的有殼變形蟲物種組成做了剖面圖譜分析,應用轉(zhuǎn)換函數(shù)定量重建了三個剖面的古水位。LGH、MG、PG三個泥炭剖面的古水位重建結(jié)果具有相關(guān)性,證明了有殼變形蟲——水位轉(zhuǎn)換函數(shù)模型在本區(qū)的適用性。三個剖面古水位重建結(jié)果有一定的差異,這也從另外一個方面證實有殼變形蟲對水位變化非常敏感。本區(qū)水位埋深重建結(jié)果的的總體趨勢是逐步增大,生境由濕變干。利用LGH泥炭剖面重建出的水位——年代曲線與氣象數(shù)據(jù)(年均溫、夏均溫、年降水、夏降水)進行相關(guān)性分析,結(jié)果表明夏季均溫可能是本區(qū)水位變化的主要氣候驅(qū)動因子。
[Abstract]:The paleolevel of peat swamp is an important parameter to study paleoenvironment with peat as information carrier, but the quantitative study on paleowater level of peat land has only risen in recent years. Daxinganling is the main distribution area of poor and nutritious peat land in China, and is sensitive to environmental change. It is suitable for studying the variation of paleowater level. In the poor nutritious peat land, the shell amoeba has a rapid response to humidity, which makes it a commonly used biological substitute index for paleowater level change. The paleowater level of three peat sections in Daxing'an Mountains has been quantitatively reconstructed by using the model of conversion function between crustal amoeba and water level in peat land in northeast China, and the correlation between the reconstruction results and meteorological data has been analyzed. To verify the applicability of the index of the shell amoeba, 48 species of the shell amoeba were identified by microscopic identification in this study. Among them, new record species Archerella flavum and new record genus Placocista (including Placocista spinosa and Placocista glabra), which have never been reported in China, have been found. The reconstruction results of paleowater level. LGHMGGG PG of three sections of three sections were correlated with the transformation function. The applicability of the conversion function model of the crustal amoeba-water level in this area is proved. The results of paleowater level reconstruction in the three sections are different to some extent. This also proves that the crustal amoeba is very sensitive to the change of water level in another way. The general trend of the result of water level reconstruction in this area is gradually increasing. The habitat was dried by humidity. The correlation analysis was carried out with meteorological data (average annual temperature, summer mean temperature, annual precipitation and summer precipitation), which were reconstructed by LGH peat profile. The results show that the mean temperature in summer may be the main climatic driving factor of water level change in this area.
【學位授予單位】：東北師范大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P531

【參考文獻】

相關(guān)期刊論文 前5條

1 秦養(yǎng)民;顧延生;王銀善;孔令惠;謝樹成;周修高;朱江;;天鵝洲長江故道近代環(huán)境變化的有殼變形蟲記錄[J];地質(zhì)科技情報;2007年03期

2 萬國江,林文祝,黃榮貴,陳振樓;紅楓湖沉積物~(137)Cs垂直剖面的計年特征及侵蝕示蹤[J];科學通報;1990年19期

3 林慶華,冷雪天,洪冰;大興安嶺近1000年來氣候變化的泥炭記錄[J];礦物巖石地球化學通報;2004年01期

4 夏玉梅;大小興安嶺泥炭的孢粉記錄及演變過程研究(英文)[J];微體古生物學報;2000年02期

5 湯奇峰;黃園英;劉久臣;徐清;王曉春;譚科艷;劉曉端;;放射性同位素定年技術(shù)在崇明島潮灘沉積速率上的應用研究[J];巖礦測試;2010年06期

相關(guān)博士學位論文 前1條

1 鮑錕山;東北山地泥炭沼澤沉積及其記錄的近200年環(huán)境變化[D];中國科學院研究生院(東北地理與農(nóng)業(yè)生態(tài)研究所);2012年

，

本文編號：1641887