气候变化领域集成服务门户(CCPortal): Long-chain diols in rivers

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.897898
	Long-chain diols in rivers
	Lattaud; Julie; Kirkels; Frédérique M S A; Peterse; Francien; Freymond; Chantal V; Eglinton; Timothy Ian; Hefter; Jens; Mollenhauer; Gesine; Balzano; Sergio; Villanueva; Laura; van der Meer; Marcel T J; Hopmans; Ellen C; Sinninghe Damsté; Jaap S; Schouten; Stefan
发布日期	2019-01-29
数据集类型	dataset
英文简介	Long-chain diols (LCDs) occur widespread in marine environments and also in lakes and rivers. Transport of LCDs from rivers may impact the distribution of LCDs in coastal environments, however relatively little is known about the distribution and biological sources of LCDs in river systems. In this study, we investigated the distribution of LCDs in suspended particulate matter (SPM) of three river systems (Godavari, Danube, and Rhine) in relation with precipitation, temperature, and source catchments. The dominant long-chain diol is the C32 1,15-diol followed by the C30 1,15-diol in all studied river systems. In regions influenced by marine waters, such as delta systems, the fractional abundance of the C30 1,15-diol is substantially higher than in the river itself, suggesting different LCD producers in marine and freshwater environments. A change in the LCD distribution along the downstream transects of the rivers studied was not observed. However, an effect of river flow is observed; i.e., the concentration of the C32 1,15-diol is higher in stagnant waters such as reservoirs and during seasons with river low stands. A seasonal change in the LCD distribution was observed in the Rhine, likely due to a change in the producers. Eukaryotic diversity analysis by 18S rRNA gene sequencing of SPM from the Rhine showed extremely low abundances of sequences (i.e., <0.32% of total reads) related to known algal LCD producers. Furthermore, incubation of the river water with 13C-labeled bicarbonate did not result in 13C incorporation into LCDs. This indicates that the LCDs present are mainly of fossil origin in the fast flowing part of the Rhine. Overall, our results suggest that the LCD producers in rivers predominantly reside in lakes or side ponds that are part of the river system.
空间范围	Median Latitude: 41.718890 * Median Longitude: 27.182629 * South-bound Latitude: 16.452000 * West-bound Longitude: 6.070000 * North-bound Latitude: 51.861000 * East-bound Longitude: 82.358000
时间范围	2007-04-11T18:03:00 - 2007-04-19T10:19:00
语种	英语
国家	国际
学科大类	气候变化
学科子类	气候变化
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/215182
推荐引用方式 GB/T 7714	Lattaud,Julie,Kirkels,et al. Long-chain diols in rivers.2019-01-29.https://doi.org/10.1594/PANGAEA.897898.