Natural and anthropogenically driven changes in the n-alkanols of lake sediments and implications for their use in paleoenvironmental studies of lakes

	Natural and anthropogenically driven changes in the n-alkanols of lake sediments and implications for their use in paleoenvironmental studies of lakes
	Zhang, Yongdong; Peng, Ting; Yu, Jinlei; Su, Yaling; Liu, Zhengwen
刊名	CATENA
	2021
卷号	207
英文摘要	In order to examine how natural backgrounds and anthropogenic activities influenced the n-alkanol profiles of lake sediments, abundances and compositions of n-alkanols were determined in sediment cores taken from four lakes with notable differences in depth, nutrient level, transparency, water residence time and human impact. The results indicate the short-chain n-alkanols (C-14, C-16 and C-18) are generally more abundant in sediments from eutrophic lakes than in oligotrophic bodies, due to greater inputs from algae and zooplankton. In individual lakes, however, high levels of short-chain n-alkanols were not always recorded in sediments of relatively eutrophic phases because contributions from zooplankton can be significant even if the lake remains relatively oligotrophic. The >C-20 n-alkanol profiles varied markedly between shallow and deep lakes. A prevalence of longchain compounds (C-26, C28, C-30 and C-32) was observed in shallow lakes and is attributable to terrestrial organic matter (OM) carried by inflowing rivers, whose relatively huge annual input is evidenced by the short water residence time in these lakes. Sediments from deep lakes were dominated by middle-chain n-alkanols (C-20, C-22 and C-24) as a result of significant input from submersed macrophytes, which achieve high productivity in the clear, sunlit water. In shallow lakes, (C-26 + C-28)/(C-22 + C-24) n-alkanol ratios in sediments were greatly dependent on anthropogenic eutrophication and aquaculture via their influence on the productivity of submersed macrophytes.
内容类型	期刊论文
源URL	[http://159.226.73.51/handle/332005/20329]
专题	中国科学院南京地理与湖泊研究所
推荐引用方式 GB/T 7714	Zhang, Yongdong,Peng, Ting,Yu, Jinlei,et al. Natural and anthropogenically driven changes in the n-alkanols of lake sediments and implications for their use in paleoenvironmental studies of lakes[J]. CATENA,2021,207.
APA	Zhang, Yongdong,Peng, Ting,Yu, Jinlei,Su, Yaling,&Liu, Zhengwen.(2021).Natural and anthropogenically driven changes in the n-alkanols of lake sediments and implications for their use in paleoenvironmental studies of lakes.CATENA,207.
MLA	Zhang, Yongdong,et al."Natural and anthropogenically driven changes in the n-alkanols of lake sediments and implications for their use in paleoenvironmental studies of lakes".CATENA 207(2021).