Advanced search
Start date
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Dynamics of Dissolved Forms of Carbon and Inorganic Nitrogen in Small Watersheds of the Coastal Atlantic Forest in Southeast Brazil

Full text
Andrade, Tatiana M. B. [1] ; Camargo, Plinio B. [1] ; Silva, Daniela M. L. [2] ; Piccolo, Marisa C. [1] ; Vieira, Simone A. [1] ; Alves, Luciana F. [3, 1, 4] ; Joly, Carlos A. [5] ; Martinelli, Luiz A.
Total Authors: 8
[1] Univ Sao Paulo USP, Lab Ecol Isotop, Ctr Energia Nucl Agr, BR-13416100 Piracicaba, SP - Brazil
[2] Univ Estadual Santa Cruz UESC, Ilheus, BA - Brazil
[3] Inst Bot, Secao Ecol, Sao Paulo - Brazil
[4] Univ Colorado, Inst Arct & Alpine Res INSTAAR, Boulder, CO 80309 - USA
[5] Univ Campinas UNICAMP, Inst Biol, Campinas, SP - Brazil
Total Affiliations: 5
Document type: Journal article
Source: WATER AIR AND SOIL POLLUTION; v. 214, n. 1-4, p. 393-408, JAN 2011.
Web of Science Citations: 21

Based on the fact that streamwater quality reflects landscape conditions, the objectives of this study were: to investigate nitrogen (N), carbon (C), and major ion concentrations in six streams crossing minimally disturbed Atlantic Forest areas, with similar geomorphological characteristics; to determine N and C fluxes in one of these pristine streams (Indaia); and assess the impact of human activity on the biogeochemistry of two other streams in the same region, crossing urbanized areas. The distribution pattern of carbon and inorganic nitrogen dissolved forms, as well as the major ion and biogenic gas concentrations in the streamwater, was similar in pristine streams, indicating that the C and N dynamics were determined by influence of some factors, such as climate, atmospheric deposition, geology, soil type, and land covering, which were analogous in the forested watersheds. The urban streams were significantly different from the pristine streams, showing low dissolved oxygen concentrations, high respiration rates, and high concentrations of carbon dioxide, dissolved inorganic nitrogen, dissolved inorganic carbon, and major ion. These differences were attributed to anthropogenic impact on water quality, especially domestic sewage discharge. Additionally, in the Indaia stream, it was possible to observe the importance of rainfall over temporal dynamics of dissolved carbon forms, and also, the obtained specific flux of dissolved inorganic nitrogen was relatively elevated (approximately 11 kg ha(-1) year(-1)). These results reveal the influence of human activity over the biogeochemistry of coastal streams and also indicate the importance N export of Atlantic Forest to the ocean. (AU)

FAPESP's process: 05/57812-0 - Spatio-temporal study of the distribution of dissolved forms of nitrogen and carbon in microbasins of the Atlantic Rainforest with different degrees of disturbance
Grantee:Tatiana Morgan Berteli de Andrade
Support type: Scholarships in Brazil - Master
FAPESP's process: 03/12595-7 - Floristic composition, structure and functioning of the Dense Rainforest nuclei of Picinguaba and Santa Virgínia of Parque Estadual da Serra do Mar, State of São Paulo, Brazil
Grantee:Carlos Alfredo Joly
Support type: BIOTA-FAPESP Program - Thematic Grants