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do N Monte C, de Castro Rodrigues AP, Silva MC, Ferreira LJS, Monte G, Silveira CS, Cordeiro RC, Machado W. Assessment of eutrophication from phosphorus remobilization after resuspension of coastal sediments from an urban tropical estuary. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:65500-65511. [PMID: 37084060 DOI: 10.1007/s11356-023-27099-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 04/14/2023] [Indexed: 05/03/2023]
Abstract
Dredging activities cause sediment resuspension, which can change the bioavailability of nutrients such as phosphorus (P) in aquatic ecosystems due to remobilization. This study evaluated the remobilization of P in the solid and dissolved phase before and after sediment resuspension in the Meriti and Iguaçu River estuaries and the Rio de Janeiro and Niterói harbor in Guanabara Bay (Rio de Janeiro, Brazil). Three water and sediment samples were collected at each point. Dissolved phosphorus (DP), total phosphorus (TP), organic phosphorus (OP), and inorganic phosphorus (IP) were analyzed before and after resuspension. Resuspension directly impacted the fine-grained samples, causing the release of P into the water column after resuspension, increasing eutrophication of the estuary and risk to biota. The phosphorus enrichment index (PEI) was calculated in the four areas, and in all areas, the index was above 1, which means high ecological risk. The area with sandy granulometry and a lower percentage of organic matter showed an increase in the index after resuspension. The resuspension may impact the increase of eutrophication in some areas, due to the remobilization of the sediment and the adsorbed contaminants.
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Affiliation(s)
- Christiane do N Monte
- Geochemistry Department, Universidade Federal Fluminense, Niterói, RJ, Brazil.
- Geology Department, Universidade Federal Do Oeste Do Pará, Santarém, PA, Brazil.
| | - Ana Paula de Castro Rodrigues
- Geochemistry Department, Universidade Federal Fluminense, Niterói, RJ, Brazil
- Marine Biology Department, Universidade Federal Do Rio de Janeiro, Ilha Do Fundão, Rio de Janeiro, RJ, Brazil
| | - Matheus Cavalcante Silva
- Postgraduate Program in Dam Engineering and Environmental Management, Universidade Federal Do Pará, Tucuruí, PA, Brazil
| | - Luana J S Ferreira
- Geochemistry Department, Universidade Federal Fluminense, Niterói, RJ, Brazil
| | - Gustavo Monte
- Geochemistry Department, Universidade Federal Fluminense, Niterói, RJ, Brazil
| | | | | | - Wilson Machado
- Geochemistry Department, Universidade Federal Fluminense, Niterói, RJ, Brazil
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Xia Z, Yuan H, Liu J, Zhao S, Tong Y, Sun Y, Li S, Li A, Cao J, Xia J, Dai W, Zhang J, He P. Biomass and species composition of green macroalgae in the Binhai Harbor intertidal zone of the Southern Yellow Sea. MARINE POLLUTION BULLETIN 2023; 186:114407. [PMID: 36470097 DOI: 10.1016/j.marpolbul.2022.114407] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Revised: 11/14/2022] [Accepted: 11/23/2022] [Indexed: 06/17/2023]
Abstract
Green tides have occurred in the Southern Yellow Sea (SYS) for 16 consecutive years, causing widespread concern. Attached and floating green macroalgae have been observed in Binhai Harbor, Jiangsu Province, China, in the SYS. This study used morphological analysis, and internal transcribed spacers and rps2-trnL molecular identification methods, to analyze the species composition and biomass of green macroalgae along the Binhai Harbor coast. Six species of green tide algae (Ulva prolifera, Ulva meridionalis, Ulva linza, Ulva flexuosa, Ulva californica, and Ulva intestinalis) were identified, in addition to Blidingia sp. The discovery of U. californica is the first report of this species off the coast of Jiangsu Province. The floating green macroalgae along the Binhai Harbor coast originated from attached green macroalgae in Binhai Harbor, and a small number of the attached algae were closely related to the large-scale floating U. prolifera in the SYS. Moreover, in December 2021, February 2022, and April 2022, the total biomass of attached green macroalgae in Binhai Harbor was 25.600, 10.767, and 25.867 t, respectively, of which the U. prolifera biomass was 10.697, 8.709, and 4.185 t, respectively. This study proved Binhai Harbor may not be an important source of green tide in the SYS.
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Affiliation(s)
- Zhangyi Xia
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| | - Huanqing Yuan
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| | - Jinlin Liu
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| | - Shuang Zhao
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| | - Yichao Tong
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| | - Yuqing Sun
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| | - Shuang Li
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| | - Aiqin Li
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| | - Jiaxing Cao
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| | - Jing Xia
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China; School of Oceanography, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Wei Dai
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| | - Jianheng Zhang
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China; Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang 222005, China.
| | - Peimin He
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China; Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang 222005, China.
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