한빛사 논문
Abstract
Ayeon Choia, Bomina Kima, Jin-Sook Moka, Jungsik Yooa, Jeong Bae Kimb, Won-Chan Leeb, Jung-Ho Hyuna,*
a Department of Marine Science and Convergence Engineering, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, Gyeonggi-do, 15588, Republic of Korea
b Marine Environment Research Division, National Institute of Fisheries Science (NIFS), Busan, 46083, Republic of Korea
*Corresponding author : Jung-Ho Hyun
Abstract
We conducted experiments to investigate the effects of finfish aquaculture and to propose appropriate proxies for assessing their environmental impact. Due to enhanced fish feed input, sulfate reduction (SR) and the resulting metabolic products (H2S, NH4+, PO43−) were significantly greater at the farm than at the control site. Benthic release of dissolved inorganic nitrogen (DIN) and phosphorus (DIP) from farm sediment accounted for 52–837% and 926–1048%, respectively, of the potential DIN and DIP demand for phytoplankton production. The results suggest that excess organic loading in fish farms induces deleterious eutrophication and algal blooms in coastal ecosystems via benthic-pelagic coupling. Direct SR measurement provided the most useful information of all the parameters on organic contamination in fish farms. However, given its abundance, relatively lower chemical reactivity and relative ease of analysis, elemental sulfur was regarded as the most appropriate proxy for assessing the environmental impacts of finfish aquaculture.
Keywords
Marine aquaculture; Elemental sulfur; Sulfate reduction; Acid volatile sulfide; Chromium reducible sulfur; Benthic nutrient flux
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