User profiles for Karen E. Samis

Karen E Samis

Director, Grants and Research Operations
Verified email at queensu.ca
Cited by 3452

Genetic variation across species' geographical ranges: the central–marginal hypothesis and beyond

CG Eckert, KE Samis, SC Lougheed - Molecular ecology, 2008 - Wiley Online Library
There is growing interest in quantifying genetic population structure across the geographical
ranges of species to understand why species might exhibit stable range limits and to assess …

Are species' range limits simply niche limits writ large? A review of transplant experiments beyond the range

AL Hargreaves, KE Samis… - The American …, 2014 - journals.uchicago.edu
Many species’ range limits (RL) occur across continuous environmental gradients without
obvious barriers imposing them. Such RL are expected to reflect niche limits (NL) and thus to …

Reproductive assurance and the evolution of uniparental reproduction in flowering plants

CG Eckert, KE Samis, S Dart, LD Harder… - … and evolution of …, 2006 - books.google.com
The assurance of reproduction when outcrossing is unpredictable is a venerable and widely
invoked explanation for uniparental reproduction via self-fertilization or asexuality. This …

Longitudinal trends in climate drive flowering time clines in North American Arabidopsis thaliana

KE Samis, CJ Murren, O Bossdorf… - Ecology and …, 2012 - Wiley Online Library
Introduced species frequently show geographic differentiation, and when differentiation
mirrors the ancestral range, it is often taken as evidence of adaptive evolution. The mouse‐ear …

Testing the abundant center model using range‐wide demographic surveys of two coastal dune plants

KE Samis, CG Eckert - Ecology, 2007 - Wiley Online Library
It is widely accepted that species are most abundant at the center of their geographic ranges
and become progressively rarer toward range limits. Although the abundant center model (…

Increased seed dispersal potential towards geographic range limits in a Pacific coast dune plant

E Darling, KE Samis, CG Eckert - New Phytologist, 2008 - Wiley Online Library
• Dispersal may be favoured at geographic range edges by unstable population and
metapopulation dynamics. However, dispersal may also evolve in response to geographic variation …

Broad geographic covariation between floral traits and the mating system in Camissoniopsis cheiranthifolia (Onagraceae): multiple stable mixed mating systems …

SR Dart, KE Samis, E Austen, CG Eckert - Annals of Botany, 2012 - academic.oup.com
Background and Aims Plants vary widely in the extent to which seeds are produced via self-fertilization
vs. outcrossing, and evolutionary change in the mating system is thought to be …

DISCORDANT LONGITUDINAL CLINES IN FLOWERING TIME AND PHYTOCHROME C IN ARABIDOPSIS THALIANA

KE Samis, KD Heath, JR Stinchcombe - Evolution, 2008 - academic.oup.com
Using seasonal cues to time reproduction appropriately is crucial for many organisms. Plants
in particular often use photoperiod to signal the time to transition to flowering. Because …

Population climatic history predicts phenotypic responses in novel environments for Arabidopsis thaliana in North America

KE Samis, JR Stinchcombe… - American Journal of …, 2019 - Wiley Online Library
Premise Determining how species perform in novel climatic environments is essential for
understanding (1) responses to climate change and (2) evolutionary consequences of …

Ecological correlates of fitness across the northern geographic range limit of a Pacific Coast dune plant

KE Samis, CG Eckert - Ecology, 2009 - Wiley Online Library
A species is expected to occur where the prevailing biotic and abiotic conditions fall within its
fundamental niche. Geographic range limits should, therefore, occur when the survival and …