Mapping and distribution of seagrass habitat using hydroacoustic technique, coastal region, South Sea of Korea

Title
Mapping and distribution of seagrass habitat using hydroacoustic technique, coastal region, South Sea of Korea
Author(s)
강돈혁; 이형빈; 정섬규
KIOST Author(s)
Kang, Don Hyug(강돈혁)
Publication Year
2011-11-16
Abstract
Presence or absence of seagrass habitats is one of the important indexes for reproductive activity at coastal marine ecosystems. Like other countries, the habitats in Korea were rapidly decreasing in the natural condition because of polluted water or improper coastal development. Recently, studies on the restoration of the damaged seagrass habitat are carried out in Korea. Most important thing in the restoration is to assess present condition of the habitat. Generally, the studies for assessment of the seagrass have been depended on the directed sampling using scuba diving. The methods have some limitations for survey area, depth and efficiency. As an alternative method, an application with hydroacoustic technique was applied to know vertical and spatial distribution of seagrass bed. The field surveys were conduced around coastal regions, on the South Sea of Korea, in September 2005, February and July 2006. Acoustic data were collected using high frequency transducer (420 kHz split-beam), which was installed with a towed body system. Simultaneously, in situ underwater camera data and directly sampling data with quadrate were collected. The number of acoustic transect was 23, 34 and 66 for September 2005, February and July 2006, respectively. Then, survey speed was approximately 3-4 knots. Results indicated that the seagrass beds were strongly limited to bathymetry and region. Conside
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/28035
Bibliographic Citation
2011 아시아수산음향학회 학술발표, pp.9, 2011
Publisher
아시아수산음향학회
Type
Conference
Language
English
Publisher
아시아수산음향학회
Related Researcher
Research Interests

Marine security,Underwater Acoustics,해양방위,수중음향

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