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Advisor(s)
Abstract(s)
Uma breve caracterização da flora vascular da ilha do Corvo é feita a partir da anÔlise do seu catÔlogo de plantas vasculares (Pereira et al., 2008). A flora vascular da ilha do Corvo fora de cultivo compreende no momento 353 unidades taxonómicas diferentes
(taxa), representadas por 351 espĆ©cies mais 2 hĆbridos, distribuĆdos por 235 gĆ©neros e 94
famĆlias. O nĆŗmero de taxa introduzidos representa 62,6 % do total dos taxa presentes, enquanto a percentagem de taxa nativos se cifra pelos 34,0 %. No entanto 40 % dos taxa nativos que ocorrem no Corvo sĆ£o endĆ©micos dos AƧores ou da MacaronĆ©sia. A distribuição das espĆ©cies nos grandes grupos taxonómicos (Pteridophyta, Gymnospermae,
Dicotyledoneae e Monocotyledoneae) difere com significado estatĆstico entre as espĆ©cies
nativas e introduzidas. A contribuição das espĆ©cies introduzidas Ć© maior a nĆvel das
dicotiledóneas e menor a nĆvel dos pteridófitos quando comparada com a distribuição das espĆ©cies nativas. Na ilha do Corvo o património botĆ¢nico mais importante consiste na Ćŗnica população de Azorina vidalii presente na Vila do Corvo, cuja colheita deve ser interdita. Durante a expedição realizada Ć quela ilha, o achado mais importante consistiu na descoberta pela primeira vez no Corvo da orquĆdea endĆ©mica Platanthera azorica. Finalmente, os desafios que valem a pena ser levados a cabo na ilha do Corvo sĆ£o: a) a plantação de Ć”rvores e arbustos nativos, na construção de abrigos e no melhoramento da captação da Ć”gua dos nevoeiros; b) a produção de semente certificada de Azorina vidalii para exportação a partir do cultivo desta espĆ©cie em quintais.
ABSTRACT: A short characterization of Corvo Island the vascular flora is made from the analysis of itās checklist of vascular plants (Pereira et al., 2008). The flora of Corvo Island out of cultivation is at the moment represented by 353 different taxa, belonging to 351 species more 2 hybrids, distributed by 235 genera and 94 families. The number of introduced species represents 62.6 % of the total species while the native species correspond to 34 %. Nevertheless about 40 % of the native taxa are endemic to Azores or Macaronesia. The species distribution on the main taxonomic groups (Pteridophyta, Gymnospermae, Dicotyledoneae e Monocotyledoneae) is significantly different between native and introduced species. The contribution of introduced species is superior in the Dicotyledoneae and inferior in the Pteridophyta when compared with the native species. In Corvo Island the most interesting endemic population is the one of Azorina vidalii at Vila do Corvo, which must be strongly protected; during the expedition the most important finding was the discovery of Platanthera azorica for the first time on Corvo Island. Finally, cloud water interception and wind shelter must be improved trough native trees and shrubs plantation, and the production of certified Azorina vidalii seeds for exportation should be authorized for Corvo inhabitants.
ABSTRACT: A short characterization of Corvo Island the vascular flora is made from the analysis of itās checklist of vascular plants (Pereira et al., 2008). The flora of Corvo Island out of cultivation is at the moment represented by 353 different taxa, belonging to 351 species more 2 hybrids, distributed by 235 genera and 94 families. The number of introduced species represents 62.6 % of the total species while the native species correspond to 34 %. Nevertheless about 40 % of the native taxa are endemic to Azores or Macaronesia. The species distribution on the main taxonomic groups (Pteridophyta, Gymnospermae, Dicotyledoneae e Monocotyledoneae) is significantly different between native and introduced species. The contribution of introduced species is superior in the Dicotyledoneae and inferior in the Pteridophyta when compared with the native species. In Corvo Island the most interesting endemic population is the one of Azorina vidalii at Vila do Corvo, which must be strongly protected; during the expedition the most important finding was the discovery of Platanthera azorica for the first time on Corvo Island. Finally, cloud water interception and wind shelter must be improved trough native trees and shrubs plantation, and the production of certified Azorina vidalii seeds for exportation should be authorized for Corvo inhabitants.
Description
XIII Expedição CientĆfica do Departamento de Biologia - Flores e Corvo 2007.
Keywords
EspƩcies Nativas Flora Vascular Ilha do Corvo (AƧores)
Pedagogical Context
Citation
"XIII expedição cientĆfica do Departamento de Biologia" / Universidade dos AƧores. - Ponta Delgada : Universidade dos AƧores, 2008. - p. 117-123
Publisher
Universidade dos AƧores