Assessing environmental changes in Lake Shihwa, South Korea, based on distributions and stable carbon isotopic compositions of n-alkanes
SCIE
SCOPUS
Cited 23 time in
WEB OF SCIENCE
Cited 25 time in
Scopus
-
Title
- Assessing environmental changes in Lake Shihwa, South Korea, based on distributions and stable carbon isotopic compositions of n-alkanes
-
Author(s)
- Kim, Dahae; Kim, Jung-Hyun; Kim, Min-Seob; Ra, Kongtae; Shin, Kyung-Hoon
- KIOST Author(s)
- Ra, Kongtae(나공태)
-
Alternative Author(s)
- 나공태
-
Publication Year
- 2018-09
-
Abstract
- We investigate historical environmental changes in an artificial lake, Lake Shihwa in South Korea, based on bulk (TOC, TN, C/N ratio, delta C-13(TOC), and delta N-15(TN)) and molecular (concentrations and delta C-13 of n-alkanes) parameters, by analyzing riverbank sediments (n =12), lake surface sediments (n = 9), and lake core sediments (n = 108). Although the bulk organic parameters showed similar characteristics for all lake surface sediment samples, the distribution pattern and delta C-13 of n-alkanes revealed distinct differences between 2009 samples and 2012/2016 samples, This change of sedimentary organic matter characteristics can be attributed to operation of the tidal power plant that began in 2011, which improved lake water circulation and thus changed the lake sedimentary environment from anoxic to more oxic conditions. The vertical profiles of bulk and molecular lake sediment core records collected in 2009, especially at the site closest to the dike, showed a drastic shift around 1987, indicating that stronger anoxic sedimentary conditions prevailed after 1987. This is linked to sea dike construction in 1987, which prohibited sea-lake water exchange and thus deteriorated water quality in Lake Shihwa. We conclude that Lake Shihwa has experienced severe environmental changes due to human activities. (C) 2018 Elsevier Ltd. All rights reserved.
-
ISSN
- 0269-7491
-
URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/842
-
DOI
- 10.1016/j.envpol.2018.04.098
-
Bibliographic Citation
- ENVIRONMENTAL POLLUTION, v.240, pp.105 - 115, 2018
-
Publisher
- ELSEVIER SCI LTD
-
Subject
- ORGANIC-MATTER; LACUSTRINE SEDIMENTS; COASTAL SEDIMENTS; EVEN; HYDROCARBONS; PETROLEUM; IDENTIFICATION; PREDOMINANCES; PACIFIC; LIPIDS
-
Keywords
- Lake Shihwa; Sedimentary organic matter; n-alkanes; Stable carbon isotope; Dike construction; Tidal power plant
-
Type
- Article
-
Language
- English
-
Document Type
- Article
- Files in This Item:
-
There are no files associated with this item.
Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.