绿潮在韩国济州沿海港湾与海底地下水排泄有关。
Green tide development associated with submarine groundwater discharge in a coastal harbor, Jeju, Korea.
机构信息
School of Earth and Environmental Sciences, Seoul National University, Seoul, 08826, Republic of Korea.
Department of Marine Life Sciences, Jeju National University, Jeju, 63243, Republic of Korea.
出版信息
Sci Rep. 2017 Jul 24;7(1):6325. doi: 10.1038/s41598-017-06711-0.
We measured the magnitude of submarine fresh groundwater discharge (SFGD) and associated nutrient inputs to Jocheon harbor, on Jeju Island, Korea, during four sampling periods, in order to determine the link between SFGD and Ulva sp. green tide development. Good correlations among salinity, Rn, and dissolved inorganic nitrogen (DIN) in harbor seawater suggest that SFGD is the major source of DIN and fresh water since there are no surface runoffs. Using a Rn mass balance model, SFGD to the harbor was estimated to be 5.8 ± 2.3 × 10 m d. The DIN inputs through SFGD enhanced DIN concentrations in harbor seawater approximately 10-fold of those in the open-ocean (outer harbor) seawater. Results from mesocosm experiments showed that the growth rate of U. pertusa increased by 160% on average due to the enhanced DIN concentrations (from 1 to 24 µM) through SFGD in this harbor. Thus, we conclude that DIN inputs through SFGD cause the green tide development in Jocheon harbor and perhaps in other green tide regions where river inputs are absent.
我们在四个采样期内测量了韩国济州岛乔川港的地下淡水排泄（SFGD）及其相关养分输入量，以确定 SFGD 与浒苔绿潮发育之间的联系。港内海水的盐度、Rn 和溶解无机氮（DIN）之间存在良好的相关性，表明 SFGD 是 DIN 和淡水的主要来源，因为没有地表径流。使用 Rn 质量平衡模型，估算 SFGD 向港口的排放量为 5.8 ± 2.3 × 10^5 m^3 d^-1。通过 SFGD 输入的 DIN 使港口海水的 DIN 浓度增加了约 10 倍，而外港（外港）海水的 DIN 浓度则增加了约 10 倍。中观实验的结果表明，由于 SFGD 增加了 DIN 浓度（从 1 到 24 μM），U. pertusa 的生长速度平均提高了 160%。因此，我们得出结论，通过 SFGD 输入的 DIN 导致了乔川港和其他可能没有河流输入的绿潮地区的绿潮发展。
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