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of the madeira and selvagens archipelagos - redmic

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S<br />

S<br />

96<br />

12.94 13.95 14.81<br />

6<br />

2<br />

Figura 6. Número (S) e densidade por 100 Km2 de taxa de plantas vasculares endémicas das ilhas dos arquipélagos<br />

da Madeira e das Selvagens.<br />

Figure 6. Number (S) <strong>and</strong> density (per 100 Km2 ) <strong>of</strong> single isl<strong>and</strong> endemic vascular plant taxa <strong>of</strong> <strong>the</strong> isl<strong>and</strong>s <strong>of</strong> <strong>the</strong> <strong>archipelagos</strong><br />

<strong>of</strong> Madeira <strong>and</strong> Selvagens.<br />

900<br />

600<br />

300<br />

0<br />

250<br />

200<br />

150<br />

100<br />

50<br />

0<br />

68<br />

Madeira<br />

(742 km 2)<br />

189<br />

679<br />

147<br />

Porto Santo<br />

(43 km 2)<br />

609<br />

430<br />

Desertas<br />

(13,5 km 2)<br />

Ilhas (isl<strong>and</strong>s)<br />

7<br />

171<br />

6<br />

200.33<br />

Selvagens<br />

(3 km 2)<br />

154<br />

Endemismos<br />

Densidade<br />

19.21<br />

Global<br />

(801,5 km 2)<br />

Figura 7. Número de taxa (S) de plantas vasculares e sua origem (endémica, END; nativa, n; introduzida, i) nos arquipélagos<br />

macaronésicos.<br />

Figure 7. Number <strong>of</strong> vascular plant taxa (S) in <strong>the</strong> Macaronesian <strong>archipelagos</strong> according to colonisation status (endemic,<br />

END; native, n; introduced, i).<br />

75<br />

Açores Madeira Selvagens Canárias Cabo Verde<br />

A Madeira e os restantes arquipélagos macaronésicos<br />

podem ser comparados quanto ao número de taxa nativos,<br />

endémicos e introduzidos. A Fig. 7 permite concluir que o<br />

arquipélago das Canárias apresenta o maior número de taxa<br />

endémicos exclusivos (67,8%) e nativos, a Madeira apresenta<br />

o segundo maior número de endemismos (16,2%) e<br />

plantas autóctones. Açores e Cabo Verde apresentam números<br />

similares no que diz respeito à endemicidade (respectivamente,<br />

7,5 e 7,2%), mas o arquipélago mais meridional<br />

apresenta maior número de plantas nativas.<br />

17<br />

Arquipélagos (<strong>archipelagos</strong>)<br />

616<br />

862<br />

670<br />

65<br />

246<br />

END<br />

n<br />

i<br />

445<br />

The number <strong>of</strong> native, endemic <strong>and</strong> introduced taxa occurring<br />

in <strong>the</strong> Madeira Archipelago <strong>and</strong> in <strong>the</strong> o<strong>the</strong>r Macaronesian<br />

<strong>archipelagos</strong> can thus be compared. Figure 7 shows<br />

that <strong>the</strong> Canarian archipelago has <strong>the</strong> highest number <strong>of</strong><br />

native <strong>and</strong> exclusive endemic taxa (67.8%) <strong>and</strong> Madeira<br />

presents <strong>the</strong> second largest number <strong>of</strong> autochthonous <strong>and</strong><br />

endemic plants (16.2%). The Azores <strong>and</strong> Cape Verde have<br />

a similar number <strong>of</strong> endemic vascular plant taxa (respectively<br />

7.5 <strong>and</strong> 7.2%), but <strong>the</strong> sou<strong>the</strong>rnmost archipelago has<br />

a larger number <strong>of</strong> native plants. The number <strong>of</strong> introduced

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