Impact of typhoons on anthropogenic nitrogen sources in Lake Sihwa, South Korea.
Mar Pollut Bull
; 202: 116324, 2024 May.
Article
en En
| MEDLINE
| ID: mdl-38579447
ABSTRACT
This study investigated the nitrate dual isotopic compositions (δ15NNO3 and δ18ONO3) of water samples to trace nitrate sources in Lake Sihwa, which encompasses various land-use types (e.g., urban, industry, wetland, and agriculture). The biogeochemical interactions of anthropogenic nitrogen sources (e.g., soil, road dust, and septic water) were also evaluated through multiple pathways from terrestrial boundaries to the water column. Based on increased concentrations of dissolved total nitrogen (DTN; 3.1 ± 1.6 mg/L) after typhoon, the variation of element stoichiometry (NPSi) in this system shifted to the relatively N-rich conditions (DIN/DIP; 14.1 ± 8.1, DIN/DSi; 1.4 ± 1.8), potentially triggering the occurrence of harmful algal blooms. Furthermore, discriminative isotopic compositions (δ15NNO3; 4.0 ± 2.1 , δ18ONO3; 6.1 ± 4.3 ) after the typhoon suggested the increased DTN input of anthropogenic origins within Lake Sihwa would be mainly transported from urban sources (76 ± 9 %). Consequently, the isotopic-based approach may be useful for effective water quality management under increased anthropogenic activities near aquatic systems.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Contaminantes Químicos del Agua
/
Lagos
/
Monitoreo del Ambiente
/
Tormentas Ciclónicas
/
Nitrógeno
País/Región como asunto:
Asia
Idioma:
En
Revista:
Mar Pollut Bull
Año:
2024
Tipo del documento:
Article
Pais de publicación:
Reino Unido