Emission load, flux and estuarine modulation of ammonium and phosphate from a small subtropical river basin to the coast

被引：2
作者：
Arueira T.D. [1 ,3 ]
Kjerfve B. [2 ]
Benassuly C.C.L. [1 ,3 ]
Isacksson P.S. [3 ]
Machado A. [3 ,4 ]
de Assis Esteves F. [1 ,3 ,4 ]
Molisani M.M. [1 ,3 ,4 ]
机构：
[1] Programa de Pós-Graduação em Ciências Ambientais e Conservação, Instituto de Biodiversidade e Sustentabilidade, Universidade Federal do Rio de Janeiro
[2] School of the Earth, Ocean & Environment, College of Arts and Sciences, University of South Carolina
[3] Instituto de Biodiversidade e Sustentabilidade, Universidade Federal do Rio de Janeiro
[4] Programa de Pós-Graduação Profissional em Ambiente, Sociedade e Desenvolvimento, Instituto de Biodiversidade e Sustentabilidade, Universidade Federal do Rio de Janeiro
来源：
Journal of Marine Systems | 2022年 / 235卷
关键词：
Brazil; Estuary; Nutrient budget; Pollution; Sewage;
D O I：
10.1016/j.jmarsys.2022.103786
中图分类号：
学科分类号：
摘要：
Small river basins represent an important source of dissolved nutrients to the coast, which are fundamental to coastal primary production. However, such transport is a resultant of nutrient fluxes from small rivers, estuarine modulation and, currently, anthropic emission loads. In this context, this study assessed ammonium (NH4+) and phosphate (PO43−) dynamics in a small subtropical river-estuary system by addressing seasonal fluxes from the river to the estuary, as well as the estuarine spring-neap tidal modulation, the resultant fluxes to the coast, and the influence of natural processes and anthropogenic activities on the land-sea nutrient dynamics. The results indicated that NH4+ and PO43− fluxes in the small river-estuary system were influenced by anthropic emission loads and by estuarine modulation through amplification of river discharge and NH4+ and PO43− concentrations and fluxes within the estuary. During most of the time, the small river-estuary system exported such dissolved nutrients to the coast, likely contributing to coastal primary production. © 2022 Elsevier B.V.
引用
收藏
相关论文
共 97 条
[1]  
ABRELPE-Brazilian Association of Public Cleaning and Special Waste, Outlook of solid waste in Brazil, (2011)
[2]  
Acevedo-Trejos E., Brandt G., Bruggeman J., Merico A., Mechanisms shaping size structure and functional diversity of phytoplankton communities in the ocean, Sci. Rep., 5, pp. 17-20, (2015)
[3]  
Acha E.M., Mianzan H.W., Guerrero R.A., Favero M., Bava J., Marine fronts at the continental shelves of austral South America: physical and ecological processes, J. Mar. Syst., 44, pp. 83-105, (2004)
[4]  
Alvarez-Vazquez M., Prego R., Ospina-Alvarez N., Caetano M., Bernardez P., Doval M., Filgueiras A., Vale C., Anthropogenic changes in the fluxes to estuaries: wastewater discharges compared with river loads in small rias, Estuar. Coast. Shelf Sci., 179, pp. 112-123, (2016)
[5]  
APHA, Standard Methods for the Examination of Water and Wastewater, (2005)
[6]  
Bristow L.A., Mohr W., Ahmerkamp S., Kuypers M.M.M., Nutrients that limit growth in the ocean, Curr. Biol., 27, pp. 474-478, (2017)
[7]  
Callaway R., Grenfell S., Lonborg C., Small estuaries: ecology, environmental drivers and management challenges, Estuar. Coast. Shelf Sci., 150, pp. 193-195, (2014)
[8]  
Cantarella H., Nitrogen, Soil Fertility, pp. 276-374, (2007)
[9]  
Carvalho Filho A., Lumbreras J.F., Santos R.D., Os Solos do Estado do Rio de Janeiro, (2000)
[10]  
Castro B.M., Miranda L.B., Physical oceanography of the western Atlantic continental shelf located between 4°N and 34°S, The Sea, 11, pp. 209-251, (1998)
12345678910