منابع مشابه
Population Demography and Herbivory of Trillium Grandiflorum
Numerous pedicellate and sessile Trillium species are endemic to eastern North America, where white-tailed deer (Odocoileus virginianus) populations have been growing in recent decades. Deer feed on Trillium plants, and because they often consume all leaves and flowers, the photosynthetic capacity of browsed plants is greatly diminished. To determine if deer can influence Trillium population dy...
متن کاملSpatial population genetic structure in Trillium grandiflorum: the roles of dispersal, mating, history, and selection.
The roles of the various potential ecological and evolutionary causes of spatial population genetic structure (SPGS) cannot in general be inferred from the extant structure alone. However, a stage-specific analysis can provide clues as to the causes of SPGS. We conducted a stage-specific SPGS analysis of a mapped population of about 2000 Trillium grandiflorum (Liliaceae), a long-lived perennial...
متن کاملLand-use history and plant performance in populations of Trillium grandiflorum
Many forest herbs show reduced frequency in forests growing on former agricultural land (secondary forests) relative to forests that were never cleared for agriculture (primary forests). To explain this pattern, studies of secondary forest colonization by forest herbs have stressed the role of limited seed dispersal, though environmental conditions may also limit colonization. Here I demonstrat...
متن کاملPost-glacial history of Trillium grandiflorum (Melanthiaceae) in eastern North America: inferences from phylogeography.
Dispersal and migration are important processes affecting the evolutionary history and genetics of species. Here we investigate post-glacial migration and gene flow in Trillium grandiflorum (Melanthiaceae), a wide-ranging, forest herb from eastern North America. Using phylogeographic approaches, we examined cpDNA and allozyme diversity in 35 populations of T. grandiflorum sampled from throughou...
متن کاملEvolutionary dynamics as a component of stage-structured matrix models: an example using Trillium grandiflorum.
Evolution by natural selection improves fitness and may therefore influence population trajectories. Demographic matrix models are often employed in conservation studies to project population dynamics, but such analyses have not incorporated evolutionary dynamics. We project evolutionarily informed population trajectories for a population of the perennial plant Trillium grandiflorum, which is d...
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ژورنال
عنوان ژورنال: Science
سال: 1884
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.ns-4.88.352-a