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Population differentiation in mediterranean plants: insights into colonization history and the evolution and conservation of endemic species

John D. Thompson
- 01 Mar 1999 - 
- Vol. 82, Iss: 3, pp 229-236
TLDR
How spatial population structure of genetic markers provides insights into the evolutionary significance of episodes of colonization and isolation in the Mediterranean flora is reviewed.
Abstract
Colonization and isolation are critical events in the evolutionary dynamics of plant populations. In this paper I review how spatial population structure of genetic markers provides insights into the evolutionary significance of episodes of colonization and isolation in the Mediterranean flora. I use as themes to structure my review the following topics: spatial structure induced by historical associations among populations of widespread species; population differentiation in relation to the evolution of closely related species with disjunct distributions; the potential effect of founder events during colonization on character evolution; and the conservation implications of spatial population structure. My review illustrates that the Mediterranean flora is full of examples that provide key insights into such evolutionary and conservation issues.

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Citations
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Journal ArticleDOI

Evolutionary diversifications of plants on the Qinghai-Tibetan Plateau.

TL;DR: The Qinghai-Tibetan Plateau (QTP) is the highest and one of the most extensive plateaus in the world and many lineages of gymnosperms have been found to evolve rapidly as discussed by the authors.
Journal ArticleDOI

The biology and ecology of narrow endemic and widespread plants: a comparative study of trait variation in 20 congeneric pairs

TL;DR: Morphological and ecophysiological traits of narrow endemic species indicate that they are not more stress-tolerant than their widespread congeners, and lower investment in pollen transfer and seed production suggest that local persistence is a key feature of the population ecology ofarrow endemic species.
Journal ArticleDOI

Ecological and evolutionary responses of Mediterranean plants to global change.

TL;DR: Responses of Mediterranean plants to global change are reviewed, specifically focusing on plastic and microevolutionary responses to climate change, and common factors that affect and limit such responses, such as habitat fragmentation.
Journal ArticleDOI

Reconstructing the evolution and biogeographic history of tribe Cardueae (Compositae)

TL;DR: Most diversification events within Cardueae are related to the continuous cycles of area connection and division between the Anatolian microplate and the western Mediterranean Basin during the Oligocene-Miocene and with the uplift of the Himalayan range from the Miocene onward.
Journal ArticleDOI

Repeat intercontinental dispersal and Pleistocene speciation in disjunct Mediterranean and desert Senecio (Asteraceae).

TL;DR: The loss of suitable land connections by the Miocene means that both New World lineages must represent long-distance dispersal, providing the first evidence of repeat intercontinental dispersal in a Mediterranean group.
References
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Journal ArticleDOI

Comparative phylogeography and postglacial colonization routes in Europe

TL;DR: A Brooks parsimony analysis produced an unrooted area phylogram, showing that: (i) the northern regions were colonized generally from the Iberic and Balkanic refugia; and (ii) the Italian lineages were often isolated due to the presence of the Alpine barrier.
Journal ArticleDOI

The population genetic consequences of habitat fragmentation for plants

TL;DR: Results of recent empirical studies suggest that while genetic variation may decrease with reduced remnant population size, not all fragmentation events lead to genetic losses and different types of genetic variation (e.g. allozyme and quantitative variation) may respond differently.
Journal ArticleDOI

Identifying Populations for Conservation on the Basis of Genetic Markers

TL;DR: The methods proposed to identify prior- ity areas for conservation of the genetic resources of the argan tree are compared to those sometimes advo- cated in the case of reserve design, where one of the goals is to maximize species richness.
Journal ArticleDOI

High level of genetic differentiation for allelic richness among populations of the argan tree [Argania spinosa (L.) Skeels] endemic to Morocco.

TL;DR: It is shown that the measure of subdivision, θST, obtained when allelic richness is used in place ofh (Nei's index of diversity), is much larger than the FST, which suggests that rare alleles have a more scattered distribution than more frequent ones.
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