0198566123.pdf

Map of the CI-2005 hotspots. 48 THE BIOGEOGRAPHY OF ISLAND LIFE Fernández and Las Desventuradas islands, grouped with the Chilea ...

biogeographers, in that we may misinterpret frag- mentary data and reach erroneous conclusions. Before we embark on a considerat ...

50 THE BIOGEOGRAPHY OF ISLAND LIFE activities. Moreover, it may well be the case for St Helena, as for some other island systems ...

DISHARMONY, FILTERS, AND REGIONAL BIOGEOGRAPHY 51 Table 3.1Apparent limits to long-distance dispersal of selected taxonomic grou ...

prey: with very few species of land birds, no land mammals, and a small land area, it is doubtful whether a predator population ...

relatively few Asian or Australian mammals (Cox and Moore 1993), and in part because other groups of more dispersive animals, su ...

will have gained significant proportions of their species from more than one land mass and more than one biogeographical provinc ...

Renvoize’s (1979) analysis of the dominant regional phytogeographical influences within the Indian Ocean (Fig. 3.7) tells a simi ...

Those oceanic islands with large proportions of endemic plants are typically high islands with varied habitats (Box 3.2; Humphri ...

DISHARMONY, FILTERS, AND REGIONAL BIOGEOGRAPHY 57 Box 3.2 Islands in the ocean: general features In Box 2.1 we outlined the diff ...

140 °E 120 °E 100 °E 80 °E 60 °E 40 °E20°E20°W40°W 60 °W 80 °W 100 ° W 120 °W Days elapsed from time of launch 5 100 90 40 30 75 ...

distributions arise (see Box 2.2). In essence, dispersal hypotheses have it that descendent forms are the product of chance, lon ...

elephants to swim across ocean gaps, using the trunk as a sort of snorkel. It had been generally assumed that this behaviour was ...

(Western Sahara), but Boa Vista (Cape Verde) is 570 km from the nearest mainland at Dakar, Senegal, and Porto Santo in Madeira i ...

richness of Madeira and the Canaries and how it is that these islands come to be regarded as the authentic core of Macaronesia ( ...

3.4 Endemism Neo- and palaeoendemism A fair number of island endemics belong to groups that formerly had a more extensive, conti ...

64 THE BIOGEOGRAPHY OF ISLAND LIFE Selected Central and South Europe fossil taxa and corresponding palaeoendemic Macaronesian la ...

improved knowledge of mainland source areas and as a result of taxonomic revisions. Although the proportion of endemics appears ...

66 THE BIOGEOGRAPHY OF ISLAND LIFE Table 3.2Native higher plant species richness and endemism of selected islands or archipelago ...

Pericallis,Cheirolophus,Argyranthemum, and Sonchus; and there are almost equally impressive radiations within the genera Echium( ...