Effect of abalone farming on sediment geochemistry in the Shallow Sea near Wando, South Korea SCIE SCOPUS KCI

Cited 16 time in WEB OF SCIENCE Cited 17 time in Scopus
Title
Effect of abalone farming on sediment geochemistry in the Shallow Sea near Wando, South Korea
Author(s)
Kang, Jeongwon; Lee, Yeon Gyu; Jeong, Da Un; Lee, Jung Sick; Choi, Yang Ho; Shin, Yun Kyung
KIOST Author(s)
Kang, Jeong Won(강정원)
Alternative Author(s)
강정원
Publication Year
2015-12
Abstract
Wando County has grown up to 93% of the total abalone produced in South Korea since the late 1990s; however, this production has been decreasing in recent years. The objectives of this study were to understand the potential contamination risks of abalone farming and to examine the influence of intensive abalone farming on sediment quality by analyzing grain-size composition, organic matter (total organic carbon (TOC), total nitrogen (TN), total sulfur (TS)) and heavy metal content, pH, and Pb-210 geochronology. The results of organic matter analysis from surface and core sediment (length: 64 cm) showed that the area around the abalone farm had oxic marine-to-brackish conditions, but that the area directly below an abalone cage (location 7) had reductive conditions, with a C/S ratio of similar to 2. The average TN levels in the surface and core sediments were 0.25% and 0.29%, respectively, and this was predominantly due to the use of seaweed for feed. The low sediment pH (surface, 7.23; core, 7.04), indicates that acidification of the bottom sediment has gradually increased since the initiation of abalone farming and is likely due to the continuous accumulation of uneaten feed and feces. Heavy metal pollution was not apparent based on the examination of EF and I-geo, although the excess metal flux of Ni, Pb, Cu, Co, As, and Cd increased toward surface of the sediment core. These sediment changes may be caused by the rapid accumulation (sedimentation rate: 1.45 cm/year) of sludge discharged from the abalone farm and may be controlled by tidal currents, physiography, water depth, and tidal ranges.
ISSN
1738-5261
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/2358
DOI
10.1007/s12601-015-0061-x
Bibliographic Citation
OCEAN SCIENCE JOURNAL, v.50, no.4, pp.669 - 682, 2015
Publisher
KOREA OCEAN RESEARCH DEVELOPMENT INST
Subject
HEAVY-METALS; ORGANIC ENRICHMENT; CARBON-DIOXIDE; C/N RATIOS; MARINE; COASTAL; PH; AQUACULTURE; SEAWATER; ACCUMULATION
Keywords
abalone farm; sediment geochemistry; Wando
Type
Article
Language
English
Document Type
Article
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