来源：海灾研       作者：鲁栋梁

近期，广西北部湾海洋灾害研究重点实验室鲁栋梁副教授及团队成员，关于大风江不同形态氮对三娘湾海域的水质贡献研究，所获得的成果论文题目为《Compositions and spatio-temporal distributions of different nitrogen species and lability of dissolved organic nitrogen from the Dafengjiang River to the Sanniang Bay, China》发表在国际知名期刊《Marine Pollution Bulletin》（IF=3.782）。

大风江作为广西沿岸主要入海河流之一，但关于大风江不同形态氮组成、含量、时空分布特征及有机氮（DON）的生物可利用性研究鲜有报道。本论文通过不同季节现场调查和连续现场培养试验相结合的方法，揭示了大风江不同形态氮的组成、含量及时空分布特征，耦合不同季节DON和PN的生物稳定性，借助于端元模型，量化了大风江不同形态氮对三娘湾海域的水质贡献，结果发现大风江DIN，PN和DON对三娘湾的水质贡献分别为55.95%, 7.03%,和5.63%。

该研究获得了国家自然科学基金（41966002，41706083,）、广西自然科学基金（2018GXNSFDA281025，2018GXNSFAA281295）和广西“海洋生态环境”院士工作站能力建设（桂科AD17129046）项目资助。

论文摘要：

Field investigations and incubation experiment were carried out in the Dafengjiang River (DFJR) and Sanniang Bay (SNB) surface water from September 2017 to July 2018 to study the composition and spatio-temporal distributions of different nitrogen (N) species, lability of dissolved organic N (DON), and contributions of different N species from the DFJR to the dissolved inorganic N (DIN) level in the SNB. The spatio-temporal distributions of different N species exhibited significant seasonal variation (p < 0.05). The average contribution of DIN, DON, and particulate nitrogen (PN) to TN was 31.91%, 46.57%, and 21.52%, respectively. Comparatively being the dominant form of N in the study area, the average lability of DON across the incubation sites D1, D5 and D7 ranged from 72%–79%. DIN, DON, and PN from the DFJR respectively contributed to 55.95%, 7.03%, and 5.63% of water quality in the SNB.

文章链接：DOI:10.1016/j.marpolbul.2020.111205，https://www.sciencedirect.com/science/article/abs/pii/S0025326X20303234