Evol Ecol Res 7: 531-548 (2005) Full PDF if your library subscribes.
Interacting effects of microsite quality, plasticity and dispersal distance from the parental site on fitness in a natural population of Impatiens capensis
Eric J. von Wettberg,* Heidrun Huber‡ and Johanna Schmitt
Department of Ecology and Evolutionary Biology, Brown University, Providence, RI 02912, USA
Address all correspondence to Eric von Wettberg, Box G-W, Ecology and Evolution, Brown University, Providence, RI 02912, USA.
Hypothesis: Induced plastic responses, environmental heterogeneity and local adaptation may have interacting and counteracting effects on the performance of organisms.
Organism: The North American herbaceous annual Impatiens capensis.
Site of experiment: This experiment was performed in a forest understory site in Bristol, RI, USA, where previous experiments have shown declines in fitness with transplanting up to 12 m from parental sites.
Methods: Eight replicated genotypes were pre-treated in a glasshouse to induce or suppress shade avoidance responses and then transplanted into 50 randomly chosen microsites within 50 m of the site from which their parents were originally collected.
Results: Overall plant fitness was significantly autocorrelated at distances less than 4 m, the primary dispersal distance of Impatiens seeds and the distance with greatest environmental spatial autocorrelation. The fitness of transplants was affected by site quality but not by distance from the site of original collection. In addition, genotypes were more sensitive to environmental factors when induced to elongate in response to neighbour shading. Finally, the genotypes most responsive to increasing site quality were the most fit.
Keywords: environmental quality, phenotypic plasticity, shade avoidance, spatial autocorrelation.
DOWNLOAD A FREE, FULL PDF COPY
IF you are connected using the IP of a subscribing institution (library, laboratory, etc.)
or through its VPN.
© 2005 Eric J. von Wettberg. All EER articles are copyrighted by their authors. All authors endorse, permit and license Evolutionary Ecology Ltd. to grant its subscribing institutions/libraries the copying privileges specified below without additional consideration or payment to them or to Evolutionary Ecology, Ltd. These endorsements, in writing, are on file in the office of Evolutionary Ecology, Ltd. Consult authors for permission to use any portion of their work in derivative works, compilations or to distribute their work in any commercial manner.
Subscribing institutions/libraries may grant individuals the privilege of making a single copy of an EER article for non-commercial educational or non-commercial research purposes. Subscribing institutions/libraries may also use articles for non-commercial educational purposes by making any number of copies for course packs or course reserve collections. Subscribing institutions/libraries may also loan single copies of articles to non-commercial libraries for educational purposes.
All copies of abstracts and articles must preserve their copyright notice without modification.