Spatial distribution and sources of organic carbon in the surface sediment of Bosten Lake, China
Zhitong Yu,Zhitong Yu,Xiujun Wang,Xiujun Wang,Xiujun Wang,Enlou Zhang,Chunhua Zhao,Xingqi Liu +7 more
TLDR
In this paper, the authors collected 13 surface (0-2 cm) sediment samples in Bosten Lake and analyzed total organic carbon (TOC), total nitrogen (TN), stable carbon isotopic composition in TOC (δ13Corg), and grain size.Abstract:
. Lake sediment is an important carbon reservoir. However, little is known on the dynamics and sources of sediment organic carbon in Bosten Lake. We collected 13 surface (0–2 cm) sediment samples in Bosten Lake and analyzed total organic carbon (TOC), total nitrogen (TN), stable carbon isotopic composition in TOC (δ13Corg), and grain size. We found a large spatial variability in TOC content (1.8–4.4 %) and δ 13Corg value (−26.77 to −23.98 ‰). Using a three-end-member mixing model with measured TOC : TN ratio and δ13Corg, we estimated that 54–90 % of TOC was from autochthonous sources. Higher TOC content (> 3.7 %) was found in the east and central-north sections and near the mouth of the Kaidu River, which was attributable to allochthonous, autochthonous plus allochthonous, and autochthonous sources, respectively. The lowest TOC content was found in the mid-west section, which might be a result of high kinetic energy levels. Our study indicated that the spatial distribution of sediment TOC in the Bosten Lake was influenced by multiple and complex processes.read more
Citations
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Estimation of different source contributions to sediment organic matter in an agricultural-forested watershed using end member mixing analyses based on stable isotope ratios and fluorescence spectroscopy.
TL;DR: The two popular source tracing tools of stable isotope ratios and fluorescence spectroscopy were used to estimate the relative source contributions to sediment organic matter (SeOM) at five different river sites in an agricultural-forested watershed, and their capabilities for the source assignment were compared.
Journal ArticleDOI
Carbon and nitrogen burial in a plateau lake during eutrophication and phytoplankton blooms.
Changchun Huang,Changchun Huang,Linlin Zhang,Yunmei Li,Chen Lin,Tao Huang,Mingli Zhang,A-Xing Zhu,Hao Yang,Xiaolei Wang +9 more
TL;DR: Evaluating the response of the organic carbon accumulation rate (OCAR) to eutrophication and algal blooms over the past hundred years in Dianchi Lake found the high loss rate of OC and organic nitrogen leads to a long-term burial efficiency of only 10% and 5%, however, this efficiency can still lead to an increase in OCAR by a factor of 4.
Journal ArticleDOI
Carbon burial in Bosten Lake over the past century: Impacts of climate change and human activity
TL;DR: Wang et al. as discussed by the authors analyzed isotopic compositions of TOC (δ 13 C org ) and carbonate ( Δ 13 C carb and δ 18 O carb ), and 137 Cs and 210 Pb.
Journal ArticleDOI
Isotopic evidence revealing spatial heterogeneity for source and composition of sedimentary organic matters in Taihu Lake, China
Zhichun Li,Zhichun Li,Xiang Li,Xuan Wang,Jie Ma,Jie Xu,Xiaoguang Xu,Ruiming Han,Yiwen Zhou,Xingcheng Yan,Guoxiang Wang +10 more
TL;DR: Li et al. as mentioned in this paper investigated the source and composition of sedimentary organic matter (SOM) pools, especially their spatial heterogeneity, in large and shallow lakes, and highlighted the application of the end-member mixing model (EMM) based on Monte Carlo simulations of δ13C and δ15N ratios to more precisely depict the spatial heterogeneity of SOM.
Journal ArticleDOI
Diatoms, spatial distribution and physicochemical characteristics of the Wular lake sediments, Kashmir valley, Jammu and Kashmir
TL;DR: In this article, Wular lake, located in north Kashmir, is one of the largest fresh water lake in India, situated at an average elevation of 1580m ASL.
References
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