التفاصيل البيبلوغرافية
| العنوان: |
Anthropogenic influence on silicon behavior in an estuary member of the Biosphere Reserve in Southeastern Brazil |
| المؤلفون: |
Bastos, Ana Teresa C. C., Braga, Elisabete S. |
| المصدر: |
Ocean and Coastal Research; Vol. 71 No. Suppl. 1 (2023): Ocean and Coastal Research: Research in a RAMSAR site: The Cananéia-Iguape-Peruibe estuarine-lagoon complex, Brazil (Special Article Collection) ; Ocean and Coastal Research; v. 71 n. Suppl. 1 (2023): Ocean and Coastal Research: Research in a RAMSAR site: The Cananéia-Iguape-Peruibe estuarine-lagoon complex, Brazil (Special Article Collection) ; 2675-2824 |
| بيانات النشر: |
Instituto Oceanográfico - Universidade de São Paulo |
| سنة النشر: |
2024 |
| المجموعة: |
Universidade de São Paulo: Portal de Revistas da USP |
| مصطلحات موضوعية: |
Silicon Biogeochemistry, Silicate, Lithogenic Silica, Biogeonic Silica, Estuaries, Valo Grande |
| الوصف: |
The Cananéia-Iguape estuarine-lagoon complex (CIELC), located in the State of São Paulo, Brazil, is consideredan area of the Biosphere Reserve. However, an artificial channel built in the northern sector of the system(Iguape) has promoted an unnatural input of fresh water into the system, leading to enhanced drainage ofterrestrial material into the estuary and influencing silicon biogeochemistry within the complex. This study usedthe distribution of different fractions of silicon along the system as a proxy for the freshwater input. The sampleswere collected during August, 2012 (winter) and February 2013 (summer) and analyzed for dissolved silicate,biogenic silica, and lithogenic silica. Dissolved silicate reached values above 200 µmol L-1 in the two seasonalperiods, indicating the constant supply of terrestrial material in the northern sector of the system associated withfresh water. Southward, where the system is more preserved (Cananéia-Ararapira), the concentration decreaseddramatically. Lithogenic silica (LSi) reached extremely high values of ~700 µmol L-1. Biogenic silica (BSi) showedconcentrations up to 120 µmol L-1 with distribution more dependent on assimilation processes and the natureof the biological communities than on the source of fresh water. The availability of different forms of Si revealedremineralization, deposition, adsorption, and uptake mechanisms with different dynamics in the northern andsouthern sectors of the system, evidencing the environmental impact by the Valo Grande Channel. |
| نوع الوثيقة: |
article in journal/newspaper |
| وصف الملف: |
application/pdf |
| اللغة: |
English |
| Relation: |
https://revistas.usp.br/ocr/article/view/222820/203235; https://revistas.usp.br/ocr/article/view/222820 |
| الاتاحة: |
https://revistas.usp.br/ocr/article/view/222820 |
| Rights: |
Copyright (c) 2024 Ocean and Coastal Research |
| رقم الانضمام: |
edsbas.FD246529 |
| قاعدة البيانات: |
BASE |