Dispersal Versus Gene Flow in Plants
نویسندگان
چکیده
منابع مشابه
Long-distance dispersal of plants.
Long-distance dispersal (LDD) of plants poses challenges to research because it involves rare events driven by complex and highly stochastic processes. The current surge of renewed interest in LDD, motivated by growing recognition of its critical importance for natural populations and communities and for humanity, promises an improved, quantitatively derived understanding of LDD. To gain deep i...
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Although theory has demonstrated rather low levels of gene flow are sufficient to counteract opposing mutation, drift, and selection, widespread recognition of the evolutionary importance of gene flow has come slowly. The perceived role of gene flow as an evolutionary force has vacillated over the last century. In the last few decades, new methods and analyses have demonstrated that plant gene ...
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0001 Nearly 150 years after Darwin published The Origin of Species , evolutionary biologists are still working out the conditions and processes that give rise to new species. Central to the identity of a species—whether species exist in nature or as theoretical constructs, as some argue—is the ability to interbreed and produce fertile offspring. Several mechanisms can act as reproductive barrie...
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The ecological significance of spacing among plants in contributing to the maintenance of species richness, particularly in tropical forests, has received considerable attention that has largely focussed on distance- and density-dependent seed and seedling mortality. More recently it has become apparent that plant spacing is also relevant to pollination, which often constrains seed production. ...
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■ Abstract Vertebrate dispersal of fruits and seeds is a common feature of many modern angiosperms and gymnosperms, yet the evolution and frequency of this feature in the fossil record remain unclear. Increasingly complex information suggests that (a) plants had the necessary morphological features for vertebrate dispersal by the Pennsylvanian, but possibly in the absence of clear vertebrate di...
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ژورنال
عنوان ژورنال: Annals of the Missouri Botanical Garden
سال: 1981
ISSN: 0026-6493
DOI: 10.2307/2398797