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Artículo

The influence of human activities on Pampean streams catchment: a biogeochemical approach

de Marco, Silvia Graciela; Marcovecchio, Jorge EduardoIcon ; Vallina, Micaela VeronicaIcon ; Barral, María PaulaIcon ; Bó, María Juliana; Camino, Mariana Alicia; Cionchi, Jose Luis; López de Armentia, Adriana Marta; Spetter, Carla VanesaIcon
Fecha de publicación: 21/01/2020
Editorial: Springer
Revista: Environmental Earth Sciences
ISSN: 1866-6299
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Oceanografía, Hidrología, Recursos Hídricos

Resumen

Pampean streams constitute a drainage network which discharges continental freshwater into the associated marine coastal zone. The present study concerned a set of streams within General Pueyrredón district, Southeastern province of Buenos Aires, Pampa’s region, Argentina, which deserves particular attention, since they flow in the area of influence of Mar del Plata, one of the most important tourist destination in the country. Different physical–chemical (i.e., temperature, conductivity, pH, dissolved oxygen), hydrographical and eco-physiological parameters were studied within five streams along an annual cycle, searching for seasonal variations and possible relations with land use. The behavior of physical–chemical parameters was consistent with previous reports on similar environments; inorganic nutrients presented high levels along the whole period, and have never been completely depleted. Within N nutrients, nitrate demonstrated to be the dominant along the whole period, with global mean values of ~ 18 µM and reaching values up to ~ 50 µM (total discharge of N ~ 1.23 Ton DIN y−1). A very high load of organic matter (from ~ 2000 mg Cm−3 in the fall up to ~ 4000 mg Cm−3 during summer) is discharged from these streams into the marine coastal zone (which represents ~ 214 Ton POC y−1) and, even until now, response effects have not been recorded there. The obtained results allowed us to sustain that anthropic activities (i.e., agriculture, cattle raising), continental runoff and climate conditions seem to be the main drivers of the hydrographical/biogeochemical behavior of the studied streams. Therefore, changes concerning them should also be included in future monitoring programs.
Palabras clave: BIOGEOCHEMICAL CYCLES , INORGANIC NUTRIENTS , ORGANIC MATTER , PAMPEAN STREAMS
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/134000
URL: http://link.springer.com/10.1007/s12665-019-8676-3
DOI: http://dx.doi.org/10.1007/s12665-019-8676-3
Colecciones
Articulos(IADO)
Articulos de INST.ARG.DE OCEANOGRAFIA (I)
Articulos(IIMYC)
Articulos de INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS
Articulos(INCUAPA)
Articulos de INVESTIGACIONES ARQUEOLOGICAS Y PALEONTOLOGICAS DEL CUATERNARIO PAMPEANO
Citación
de Marco, Silvia Graciela; Marcovecchio, Jorge Eduardo; Vallina, Micaela Veronica; Barral, María Paula; Bó, María Juliana; et al.; The influence of human activities on Pampean streams catchment: a biogeochemical approach; Springer; Environmental Earth Sciences; 79; 1; 21-1-2020; 1-16
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