Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.15/450
Título: Aquatic plants in the rice fields of the Tagus Valley, Portugal
Autor: Vasconcelos, T.
Tavares, M.
Gaspar, Natália
Palavras-chave: Ecological profiles
Rice weeds
Oryza sativa
Heteranthera limosa
Heteranthera reniformis
Arroz
Infestante aquática
Vale do Tejo
Data: 1999
Editora: Kluwer
Citação: VASCONCELOS, T.; TAVARES M, GASPAR, N. 1 (1999) - Aquatic plants in the rice fields of the Tagus Valley, Portugal. Hydrobiologia, 415: 59-65.
Resumo: In 1997, in 50 surveys of irrigated rice fields (Oryza sativa L.), 47 species of vascular plants were recorded in 19 families. Most of the species belonged to the Gramineae and Cyperaceae families. Seven species of algae were found, mostly Hydrodictyon reticulatum (42%) and Chara vulgaris (38%). Echinochloa crus-galli and Paspalum paspalodes showed a relative frequency of 98% and 82%, respectively. An interpretation of the major factors is presented influencing weed distribution. Amongst the weeds recorded, 13 were alien species. For these alien species the probable date of introduction into Portugal and into rice fields was determined. The recently introduced neophytes Heteranthera limosa and Heteranthera reniformis and the increasing presence of red rice (Oryza sativa), represent a potential danger to rice culture.
Peer review: yes
URI: http://hdl.handle.net/10400.15/450
ISSN: 0018-8158
Versão do Editor: http://www.springerlink.com/content/t6466x8734857145/fulltext.pdf
Aparece nas colecções:Artigos em revistas internacionais_ESAS

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