ผลกระทบของกิจกรรมมนุษย์ต่อสัตว์ทะเลหน้าดินขนาดใหญ่บริเวณชายหาดบางแสน และหาดวอนนภา จังหวัดชลบุรี EFFECT OF ANTHROPOGENIC ACTIVITIES ON BENTHIC MACROFAUNA IN BANG SAEN AND WONNAPA BEACHS, CHONBURI PROVINCE
Keywords:
Anthropogenic Activities, Sandy Beach, Benthic Macrofauna, Chon Buri ProvinceAbstract
The anthropogenic impacts on benthic macrofauna and environmental factors in Bang Saen and Wonnapa beaches, Chon Buri Province were investigated. Three sampling stations were set every 100 m along transect line of each beach. Each station was divided into 2 subsamplings: high water (innermost) station and 10 m offshore (outermost) station. Three taxa of macrofauna were recorded namely polychaetes, bivalves and crustaceans. The number of species of benthic fauna was higher in Bang Saen (12 species) than Wonnapa (9 species). The abundance and biomass of benthic macrofauna in Wonnapa (4-704 inds m-2 and 0.107-70.77 g m-2, respectively) were higher than those in Bang Saen (12-80 inds m-2 and 0.13-58.00 g m-2, respectively) due to the abundance of orbiniid polychaete, Scoloplos sp. and amphipods. The sediment properties including grain size composition and organic matter content, salinity and pH of the interstitial water were the main factors related to distribution and density of benthic macrofauna in these areas.
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