사질과 니질 우세 퇴적물 조성에 따른 갯벌 패류어장의 저서환경 특성 비교
Comparative Analysis of Benthic Environmental Characteristics on Tidal Clam Farms with Sand- and Mud-Dominated Sediments
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In this study, we aimed to compare the benthic environmental characteristics of major clam farming tidal flats based on sand- and mud- dominated sediments. Hwangdo (HD) and Boryeong (BR) comprised an average of 73.0% sand. Meanwhile, Geunso (GnS) and Gomso (GmS) consisted of 81.1% mud. All sites maintained organic pollution levels below the environmental criteria. However, mud-dominated sediments had higher levels than sand-dominated sediments. Exposure time followed the order of HD>GmS≥BR>GnS, influencing sediment temperature dynamics. During summer, HD showed the largest daily peak difference between air and sediment temperatures owing to longer than average exposure. Meanwhile, GnS exhibited the smallest variation. Benthic macrofaunal communities showed 35% similarity between HD and BR, located in the inner and outer bays, respectively. In contrast, GnS and GmS presented distinct regional differences. These findings highlight the importance of understanding the abiotic and biotic factors shaped by dominant sediment types for tidal clam farms sustainable management.
Abstract
In this study, we aimed to compare the benthic environmental characteristics of major clam farming tidal flats based on sand- and mud- dominated sediments. Hwangdo (HD) and Boryeong (BR) comprised an average of 73.0% sand. Meanwhile, Geunso (GnS) and Gomso (GmS) consisted of 81.1% mud. All sites maintained organic pollution levels below the environmental criteria. However, mud-dominated sediments had higher levels than sand-dominated sediments. Exposure time followed the order of HD>GmS≥BR>GnS, influencing sediment temperature dynamics. During summer, HD showed the largest daily peak difference between air and sediment temperatures owing to longer than average exposure. Meanwhile, GnS exhibited the smallest variation. Benthic macrofaunal communities showed 35% similarity between HD and BR, located in the inner and outer bays, respectively. In contrast, GnS and GmS presented distinct regional differences. These findings highlight the importance of understanding the abiotic and biotic factors shaped by dominant sediment types for tidal clam farms sustainable management.