scholarly journals Do plant populations on distinct inselbergs talk to each other? A case study of genetic connectivity of a bromeliad species in an Ocbil landscape

2017 ◽  
Vol 7 (13) ◽  
pp. 4704-4716 ◽  
Author(s):  
Karina Vanessa Hmeljevski ◽  
Alison Gonçalves Nazareno ◽  
Marcelo Leandro Bueno ◽  
Maurício Sedrez dos Reis ◽  
Rafaela Campostrini Forzza
Keyword(s):  
Genetic Connectivity ◽  
Plant Populations

scholarly journals Hybridization can facilitate species invasions, even without enhancing local adaptation

2016 ◽  
Vol 113 (36) ◽  
pp. 10210-10214 ◽  
Author(s):  
Mohsen B. Mesgaran ◽  
Mark A. Lewis ◽  
Peter K. Ades ◽  
Kathleen Donohue ◽  
Sara Ohadi ◽  
...  
Keyword(s):  
Leading Edge ◽  
Allee Effects ◽  
Plant Populations ◽  
Individual Fitness ◽  
Founding Population ◽  
Species Invasions ◽  
Cakile Maritima ◽  
Model Predictions ◽  
Cakile Edentula

The founding population in most new species introductions, or at the leading edge of an ongoing invasion, is likely to be small. Severe Allee effects—reductions in individual fitness at low population density—may then result in a failure of the species to colonize, even if the habitat could support a much larger population. Using a simulation model for plant populations that incorporates demography, mating systems, quantitative genetics, and pollinators, we show that Allee effects can potentially be overcome by transient hybridization with a resident species or an earlier colonizer. This mechanism does not require the invocation of adaptive changes usually attributed to invasions following hybridization. We verify our result in a case study of sequential invasions by two plant species where the outcrosser Cakile maritima has replaced an earlier, inbreeding, colonizer Cakile edentula (Brassicaceae). Observed historical rates of replacement are consistent with model predictions from hybrid-alleviated Allee effects in outcrossers, although other causes cannot be ruled out.

Spatiotemporal Demographic Processes in Plant Populations: An Approach and a Case Study

1990 ◽  
Vol 135 (3) ◽  
pp. 382-397 ◽  
Author(s):  
Ronen Kadmon ◽  
Avi Shmida
Keyword(s):  
Plant Populations ◽  
Demographic Processes

Use Categories and Local Perception of Decline in Plant Populations: a Case Study of Woody Medicinal Plants in Northeastern Brazil

2020 ◽  
Vol 74 (3) ◽  
pp. 356-362
Author(s):  
Edgar Caliento Barbosa ◽  
Ramon Salgueiro Cruz ◽  
Gabriela Maria Cota dos Santos ◽  
Rafael Ricardo Vasconcelos da Silva ◽  
Ulysses Paulino de Albuquerque ◽  
...  
Keyword(s):  
Medicinal Plants ◽  
Northeastern Brazil ◽  
Plant Populations ◽  
Local Perception ◽  
Use Categories

scholarly journals An Analysis of the Distribution of Seed Size: A Case Study of the Gymnosperms

2012 ◽  
Vol 40 (2) ◽  
pp. 46 ◽  
Author(s):  
Lorentz JANTSCHI ◽  
Rodica C. SOBOLU ◽  
Sorana D. BOLBOACÄ‚
Keyword(s):  
Extreme Values ◽  
Seed Morphology ◽  
Logistic Distribution ◽  
Distribution Analysis ◽  
Phylogenetic Information ◽  
Plant Populations ◽  
Distribution Laws ◽  
Seed Width ◽  
Best Fit

Seed morphology is one of the most addressed issues in seeding plants studies due to its importance in the propagation of seeding plants, which can be related to the influence of the environment of the genetic structure in plant populations. A distribution analysis was conducted on extreme values (minimum and maximum) of seed width and length for gymnosperms spread within the Carpathian Mountains region. Combining the probabilities from independent tests successfully limited the best-fit distribution to a small number of distribution laws. Analyses revealed that the extreme values of investigated seed width and length best fit a log-logistic distribution or one of its generalised forms. The left-weighting of the distribution (to small sizes) revealed a better adaptation of small-sized seeding species. The extreme values of seed dimensions could be used to predict the dimension of a random observation, while the composition of the seeds, which is related to dimension, could provide phylogenetic information.

Sign in / Sign up

Export Citation Format

Share Document