Aragonite saturation state in a tropical coastal embayment dominated by phytoplankton blooms (Guanabara Bay - Brazil)

被引：17

作者：

Cotovicz, Luiz C., Jr. ^{[1
,3
]}

Knoppers, Bastiaan A. ^{[1
]}

Brandini, Nilva ^{[2
]}

Poirier, Dominique ^{[3
]}

Costa Santos, Suzan J. ^{[1
]}

Abril, Gwenael ^{[1
,3
,4
]}

机构：

[1] Univ Fed Fluminense, Lab Biogeoquim Marinha, Dept Geoquim, Outeiro Sao Joao Batista S-N, BR-24020015 Niteroi, RJ, Brazil

[2] Univ Fed Alagoas, Inst Geog Desenvolvimento & Meio Ambiente, Lab Ciencias Mar, Programa Posgrad Geog, BR-57072900 Maceio, AL, Brazil

[3] Univ Bordeaux, CNRS, Lab Environm & Paleoenvironm Ocean & Continentaux, Allee Geoffroy St Hilaire, F-33615 Pessac, France

[4] Ctr IRD France Nord, LOCEAN, 32 Ave Henri Varagnat, F-93143 Bondy, France

来源：

MARINE POLLUTION BULLETIN | 2018年 / 129卷 / 02期

关键词：

Carbonate chemistry; Coastal eutrophication; Coastal acidification; Phytoplankton blooms; RIO-DE-JANEIRO; TIME-SERIES SITE; OCEAN ACIDIFICATION; INORGANIC CARBON; EUTROPHICATION; SEAWATER; SEA; CO2; WATER; ACID;

D O I：

10.1016/j.marpolbul.2017.10.064

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The dynamics of the aragonite saturation state (Omega(arag)) were investigated in the eutrophic coastal waters of Guanabara Bay (RJ-Brazil). Large phytoplankton blooms stimulated by a high nutrient enrichment promoted the production of organic matter with strong uptake of dissolved inorganic carbon (DIC) in surface waters, lowering the concentrations of dissolved carbon dioxide (CO2aq), and increasing the pH, Omega(arag) and carbonate ion (CO32- especially during summer. The increase of Omega(arag) related to biological activity was also evident comparing the negative relationship between the Omega(arag) and the apparent utilization of oxygen (AOU), with a very close behavior between the slopes of the linear regression and the Redfield ratio. The lowest values of Omega(arag) were found at low-buffered waters in regions that receive direct discharges from domestic effluents and polluted rivers, with episodic evidences of corrosive waters (Omega(arag) < 1). This study showed that the eutrophication controlled the variations of Omega(arag) in Guanabara Bay.

引用

页码：729 / 739

页数：11

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