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(eds.) (2005). - Portal da Biodiversidade dos Açores - Universidade ...

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particularmente no que se refere à contagem de<br />

espécies. Para tal vamos analisar os quatro grande<br />

grupos de organimos lista<strong>dos</strong> no capítulo 4: Bryophyta<br />

(musgos, antocerotas e hepáticas), Pteridophyta<br />

e Spermatophyta (fetos e fanerogâmicas),<br />

Mollusca (lesmas e caracóis) e Arthropo<strong>da</strong> (centopeias,<br />

diplópodes, crustáceos, aranhas, ácaros, insectos,<br />

etc.). Embora estejamos cientes que muitos<br />

outros grupos taxonómicos deveriam igualmente ter<br />

sido considera<strong>dos</strong> (e.g. líquenes, fungos, nemáto<strong>dos</strong>,<br />

rotíferos, anelídeos, vertebra<strong>dos</strong>), a lista apresenta<strong>da</strong><br />

(ver Cap. 4) engloba a maior fatia <strong>da</strong> biodiversi<strong>da</strong>de<br />

terrestre <strong>dos</strong> <strong>Açores</strong>. Um sumário <strong>da</strong> diversi<strong>da</strong>de de<br />

espécies conheci<strong>da</strong> <strong>dos</strong> <strong>Açores</strong> é apresenta<strong>da</strong> no<br />

Quadro 1. O número total de espécies e ou subespécies<br />

<strong>dos</strong> <strong>Açores</strong> pertencentes aos quatro grupos<br />

principais (briófitos, plantas vasculares, moluscos e<br />

artrópodes) é de cerca de 3705. No entanto, se<br />

adicionarmos outros grupos como os vertebra<strong>dos</strong><br />

(Chor<strong>da</strong>ta, Vertebrata), anelideos (Anneli<strong>da</strong>), nemáto<strong>dos</strong><br />

(Nemato<strong>da</strong>) e líquenes o número de espécies<br />

e subespécies atinge as 4487 (Quadro 1; ver igualmente<br />

a lista de espécies nos Apêndices 2 e 3). Deste<br />

modo cerca de 83% <strong>da</strong> biodiversi<strong>da</strong>de terrestre<br />

conheci<strong>da</strong> <strong>dos</strong> <strong>Açores</strong> é aqui analisa<strong>da</strong> em detalhe.<br />

Se quantificarmos apenas as ver<strong>da</strong>deiras espécies,<br />

então temos 3666 espécies individuais de Bryophyta,<br />

Quadro 1. Número de taxa <strong>da</strong> fauna e flora terrestres <strong>dos</strong> <strong>Açores</strong>.<br />

Table 1. Number of taxa in the terrestrial fauna and flora of the Azores.<br />

Phyla<br />

Espécies<br />

(Species)<br />

26<br />

gamics), Mollusca (slugs and snails) and Arthropo<strong>da</strong><br />

(millipedes, centipedes, mites, spiders,<br />

insects, etc.). Although we are fully aware of the<br />

fact that for a complete listing other groups<br />

should have been considered (e.g. lichens, fungi,<br />

annelids, nematodes, rotifers, vertebrates), the<br />

current list (see Chapter 4) concentrates on the<br />

predominant terrestrial Azorean biodiversity.<br />

A summary of known species diversity in the<br />

Azores is in Table 1. Currently the total number of<br />

terrestrial species and subspecies in the Azores is<br />

estimated of about 3705 (this includes only the<br />

listed individual species or subspecies of bryophytes,<br />

vascular plants, molluscs and arthropods).<br />

However, if we add other groups like vertebrates<br />

(Chor<strong>da</strong>ta, Vertebrata), annelids (Anneli<strong>da</strong>), nematodes<br />

(Nemato<strong>da</strong>) and lichens, this number reaches<br />

4487 species and subspecies (Table 1; see also<br />

lists for the Azores in the Appendices 2 and 3).<br />

Consequently this investigation concentrates on<br />

83% of the known Azorean terrestrial biodiversity.<br />

If we count only the true species, than we have<br />

3666 individual species of Bryophyta, Pteridophyta,<br />

Spermatophyta, Mollusca and Arthropo<strong>da</strong>,<br />

and a total of 4443 species including the<br />

remaining terrestrial groups (Table 1). Therefore,<br />

this implies that we have some species with more<br />

Subespécies<br />

(Subspecies)<br />

Individual<br />

Taxa<br />

Arthropo<strong>da</strong> (1) 2196 115 2209<br />

Spermatophyta (1) 851 101 876<br />

Líquenes (Lichens)* 629 4 632<br />

Bryophyta (1) 437 4 438<br />

Mollusca (1) 111 0 111<br />

Nemato<strong>da</strong>* 80 0 80<br />

Pteridophyta (1) 71 4 71<br />

Chor<strong>da</strong>ta* 47 4 49<br />

Anneli<strong>da</strong>* 21 0 21<br />

TOTAL (1) 3666 224 3705<br />

TOTAL (incl. *) 4443 232 4487<br />

* Ver apêndices 2 e 3 (* see appendices 2 and 3).

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