Results 161 to 170 of about 25,956 (178)

Ecological Causes of Speciation

1998
Abstract How environments cause new species to form remains a fundamental problem in the search for diversity’s origins. Major ideas on the subject were elaborated and discussed earlier this century (Fisher 1930; Wright I 940; Muller 1940; Mayr 1942, 1963; Simpson 1944, 1953; Dobzhansky 1951) but were not resolved.
openaire   +1 more source

Isolate Selection and Ecological Speciation

Systematic Botany, 2005
The products of ecological speciation rarely engage in wholesale hybridization with their progenitors, because the ecological barriers between them are unusually strong. This strength may simply be the result of directional selection, or they may arise from the differential survival of incipient species with the strongest barriers.
openaire   +1 more source

Speciation: The Ecological Transition

2000
Abstract The role of ecological processes in speciation has been the subject of debate for several decades (Schluter, 1998). Two principal ideas emerge. The most prominent is that divergent natural selection on populations in different envi-ronments drives the development of pre- and postzygote barriers to gene ex change (Mayr, 1942 ...
openaire   +1 more source

Ecological Speciation: Crossing the Divide

Systematic Botany, 2004
The magnitude of niche shifts associated with ecological speciation and the factors that regulate the process are poorly understood. I propose that ecological transitions most often involve the invasion of habitats most accessible through seed dispersion and by relatively small genetic changes. A significant seed rain is required for the recruitment of
openaire   +1 more source

Ecological speciation in postglacial fishes

Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences, 1996
A venerable view of speciation is that reproductive isolation ultimately evolves from contrasting selection pressures between populations exploiting different resource environments. Yet, this ‘ecological’ mode of species origins has been tested rarely in nature.
openaire   +1 more source

The ecological basis of speciation

2000
Abstract The rise of ecological and phenotypic diversity in adaptive radiation is accompanied by one or more episodes of speciation. Determining how the new species form, and why the pace of species formation is higher during some periods than others, is thus crucial to understanding the process.
openaire   +1 more source

Ecological speciation in postglacial fishes

1997
Abstract The ecological processes that drive speciation are poorly understood. The topic has received only sporadic attention over the past few decades, confined largely to a fraction of literature devoted to the possibility of speciation in sympatry (Rice and Hostert 1993; Bush 1994). Progress in identifying environmental mechanisms has
openaire   +1 more source

The Biomechanics of Ecological Speciation

2006
Podos, J, Hendry, AP
openaire   +3 more sources

Ecological Speciation

2012
openaire   +1 more source

Investigating ecological speciation

2001
openaire   +1 more source