Toxicity evaluation of natural samples from the vicinity of rice fields using two trophic levels

• Tipo: Artigo em Revista Científica Internacional
• Data: 2011

Autores

Catarina R Marques (Autor) Outra; Ruth Pereira (Autor) FCUP; Fernando Goncalves (Autor) Outra

Revista

Título: Environmental Monitoring and Assessment

Vol. 180

Páginas: 521-536

ISSN: 0167-6369

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 9 Citações

Scopus - 11 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Ciências da terra e ciências do ambiente

Outras Informações

ID Authenticus: P-002-NE2

DOI: 10.1007/s10661-010-1803-y

Abstract (EN): An ecotoxicological screening of environmental samples collected in the vicinity of rice fields followed a combination of physical and chemical measurements and chronic bioassays with two freshwater trophic levels (microalgae: Pseudokirchneriella subcapitata and Chlorella vulgaris; daphnids: Daphnia longispina and Daphnia magna). As so, water and sediment/soil elutriate samples were obtained from three sites: (1) in a canal reach crossing a protected wetland upstream, (2) in a canal reach surrounded by rice fields and (3) in a rice paddy. The sampling was performed before and during the rice culture. During the rice cropping, the whole system quality decreased comparatively to the situation before that period (e.g. nutrient overload, the presence of pesticides in elutriates from sites L2 and L3). This was reinforced by a significant inhibition of both microalgae growth, especially under elutriates. Contrary, the life-history traits of daphnids were significantly stimulated with increasing concentrations of water and elutriates, for both sampling periods.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 16