0198566123.pdf

addition to such non-selective drift there may also be distinctive selective features of the novel island environment. The outco ...

occurs solely through branching (Herben et al. 2005).) Thus, although bottlenecks can serve to reduce the genetic base of a new ...

features. The relative contribution of environmental and genetic factors to developmental stability in the sleepy lizard cannot ...

allozyme loci of 0.186, which is more than twice as high as the mean reported for Pacific island endemics (0.064) by DeJoode and ...

Thus, bottlenecks can variously diminish het- erozygosity (a general indicator of fitness), or in contrast can serve to ‘shake t ...

out, much of this literature is, in essence, concerned with competition, chasing the elusive question (Law and Watkinson 1989) o ...

finch species on remote islands such as Hawaii and the Galápagos are highly divergent in terms of beak sizes (and seed sizes uti ...

ECOLOGICAL RESPONSES TO EMPTY NICHE SPACE 175 Species impoverishment Continental resources Species richness Island resources Spe ...

island populations, but there appears to be good evidence for their operation for many island line- ages, providing selective en ...

maximum duration of about three centuries, for which two otherwise allopatric species have co-occurred. Furthermore, within the ...

(out-crossing) has been substituted by insular auto- gamy (self-compatability). We might anticipate that any initial advantage i ...

although closely related and hybridizing to a limited extent (through the activities of males of the sexual form), are considere ...

We highlight two features. First, because of the impoverishment in species, island pollination and dispersal networks tend to fe ...

have left behind their continental networks (Olesenet al. 2002). Unusual pollinators The absence of many common continental poll ...

The loss of dispersal powers Given that oceanic islands are so hard to reach, it may appear paradoxical that so many flightless ...

parrot), the Auckland Islands teal (Anas auck- landica), the Galápagos cormorant (Phalacrocorax harrisi), the three Hawaiian ibi ...

they were working on a micro-scale version of the oceanic island examples usually cited, i.e. their populations were very small, ...

from herbaceous ancestors has been repeated several times in some lineages, as in the Macaronesian endemic genus Pericallis(Pane ...

5 The taxon cycling hypothesis(Givnish 1998). Successful island colonizers are usually weedy species that established themselves ...

NICHE SHIFTS AND SYNDROMES 187 0.00 0.50 1.00 1.50 2.00 2.50 1 10 100 1 000 Body size of mainland population (g) 10 000 100 000 ...