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Dissolved organic nutrients (C, N, P) in seawater on the continental shelf in the Southwestern South Atlantic with emphasis State Marine Park of Laje de Santos (SMPLS) - São Paulo - Brazil


 
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1. Title Title of document Dissolved organic nutrients (C, N, P) in seawater on the continental shelf in the Southwestern South Atlantic with emphasis State Marine Park of Laje de Santos (SMPLS) - São Paulo - Brazil
 
2. Creator Author's name, affiliation, country Elisabete de Santis Braga; Universidade de São Paulo; Instituto Oceanográfico; Laboratory of Biogeochemistry of Nutrients, Micronutrients and Traces in Oceans; Brazil
 
2. Creator Author's name, affiliation, country Gláucia Bueno Benedetti Berbel; Universidade de São Paulo; Instituto Oceanográfico; Laboratory of Biogeochemistry of Nutrients, Micronutrients and Traces in Oceans; Brazil
 
2. Creator Author's name, affiliation, country Vitor Gonsalez Chiozzini; Universidade de São Paulo; Instituto Oceanográfico; Laboratory of Biogeochemistry of Nutrients, Micronutrients and Traces in Oceans; Brazil
 
2. Creator Author's name, affiliation, country Natalia Cristina Garrido Andrade; Universidade de São Paulo; Instituto Oceanográfico; Laboratory of Biogeochemistry of Nutrients, Micronutrients and Traces in Oceans; Brazil
 
3. Subject Discipline(s)
 
3. Subject Keyword(s) Dissolved Organic Compounds; Organic Nitrogen; Organic Phosphorus; Organic Carbon; Urea; Marine Park
 
4. Description Abstract The main objective of this work is evaluate seasonal and spatial distribution of dissolved organic carbon (DOC), dissolved organic nitrogen (DON), dissolved organic phosphorus (DOP) and urea in 10 stations of the State Marine Park of Laje de Santos (SMPLS). Stations 1 to 4 (nearest the continent) and the stations 5 to 10 (nearest the marine park) all of them were on the continental shelf. The results show that no statistic significant seasonal variations were found for the DOC and DOP nevertheless DOC and DON in summer period were lightly above the winter period showing the increase in biological activities and continental influence. On the other hand, DON showed high values in June (2014 - winter) to January 2015, ranging from 12.51 to 32.76 µmol L-1 according to the ANOVA method (p <0.01). Low values of DON in January 2014 (0.32 to 8.98 µmol L-1) was observed in a summer unusually dry, while the highest values were observed in July 2014 (27.50 µmol L-1). Urea presented low values in SMPLS region and coastal areas reaching 4.00 µmol L-1. Sometimes, the urea concentration can be associated with diving activity in the park. DOC, DON and urea showed differences between SMPLS stations (5-10) and coastal stations (1-4). DOC coastal stations reached 267 µmol L-1, while the SMPLS the maximum value was 100 µmol L-1. No significant spatial variation between coastal stations and park were observed for the DOP (ANOVA p <0.01). Considering that dissolved organic compounds can also be monitored by means of the evaluation of C, N, P in their organic fraction, it was concluded that in the studied region the impact of eutrophic waters under continental and anthropic influence is minimal and these parameters could be monitored to support monitoring in the region.
 
5. Publisher Organizing agency, location Universidade de São Paulo. Instituto Oceanográfico
 
6. Contributor Sponsor(s)
 
7. Date (YYYY-MM-DD) 2017-12-01
 
8. Type Status & genre Peer-reviewed Article
 
8. Type Type
 
9. Format File format PDF
 
10. Identifier Uniform Resource Identifier https://www.revistas.usp.br/bjoce/article/view/144039
 
10. Identifier Digital Object Identifier (DOI) http://dx.doi.org/10.1590/s1679-87592017136506504
 
11. Source Title; vol., no. (year) Brazilian Journal of Oceanography; Vol 65, No 4 (2017)
 
12. Language English=en en
 
13. Relation Supp. Files
 
14. Coverage Geo-spatial location, chronological period, research sample (gender, age, etc.)
 
15. Rights Copyright and permissions Copyright (c) 2018 Brazilian Journal of Oceanography