Aquaculture Farming Effect on Benthic Respiration and Nutrient Flux in Semi-Enclosed Coastal Waters of Korea

Journal of Marine Science and Engineering

Jae-Hoon Choi¹  Jae-Hyuk Shin¹  Hyo-Jin Lee¹  Sang-Hwa Choi²  Dongmun Choi³  Kyung-Tae Kim⁴  Sung-Han Kim⁴  Jae-Seong Lee⁴  Won-Chan Lee⁵  Hyung-Chul Kim⁶ 

[1] Department of Environmental Chemistry and Ecology, Geosystem Research Corporation, 172 LS-ro, Gunpo-si 15807, Korea;Instrumental Development and Management Center, Korea Institute of Ocean Science and Technology, 385, Haeyang-ro, Yengdo-gu, Busan 49111, Korea;Marine Bio-Resources Research Unit, Korea Institute of Ocean Science and Technology, 385, Haeyang-ro, Yengdo-gu, Busan 49111, Korea;Marine Environment Research Center, Korea Institute of Ocean Science and Technology, 385, Haeyang-ro, Yengdo-gu, Busan 49111, Korea;Marine Environmental Research Division, National Institute of Fisheries Science, 216 Gijanghaean-ro, Gijang-eup, Busan 46083, Korea;Research and Development Planning Division, National Institute of Fisheries Science, 216 Gijanghaean-ro, Gijang-eup, Busan 46083, Korea;

关键词: aquaculture;    sediment oxygen demand;    organic carbon remineralization;    benthic nutrient flux;    carbon cycle;    nutrient cycle;   

DOI  :  10.3390/jmse9050554

来源: DOAJ

【 摘 要 】

Sediment oxygen demand (SOD) and benthic nutrient fluxes (BNFs) were measured using an in situ benthic chamber at a fish farm (FF), oyster farm (OF), and controls (FF-C and OF-C) to assess the impact of aquaculture activities on organic carbon (OC) and nutrients cycles in coastal waters of Korea. The SOD at FF and OF ranged from 60 ± 2 to 157 ± 3 mmol m⁻² d⁻¹ and from 77 ± 14 to 84 ± 16 mmol m⁻² d⁻¹, respectively, more than five times those of the control sites. The SOD at farm sites is highly correlated with fish stock and food input, suggesting that excess feed input is an important control factor for OC remineralization. The combined analysis of sediment trap and SOD indicates that most of the deposited OC oxidized in the sediment and/or was laterally transported by the current before being buried in the sediment. The benthic nutrient fluxes at farms ranged from 5.45 to 8.95 mmol N m⁻² d⁻¹ for nitrogen and from 0.51 to 1.67 mmol P m⁻² d⁻¹ for phosphate, respectively, accounting for 37–270% and 52–804% of the N and P required for primary production in the water column. These results indicate that aquaculture farming may profoundly impact biogeochemical cycles in coastal waters.

【 授权许可】

Unknown