Search Results - Karron, J. D.

Effects of floral display size on male and female reproductive success in Mimulus ringens by Karron, Jeffrey D., Mitchell, Randall J.

“…• Background and Aims The number of flowers blooming simultaneously on a plant may have profound consequences for reproductive success. Large floral displays…”
Get full text

The Influence of Mimulus ringens Floral Display Size on Pollinator Visitation Patterns by Mitchell, R. J., Karron, J. D., Holmquist, K. G., Bell, J. M.

“…1. Pollinators visiting large floral displays may probe several flowers in sequence, leading to geitonogamous (among-flower) self-pollination. To investigate…”
Get full text

influence of floral display size on selfing rates in Mimulus ringens by Karron, J.D, Mitchell, R.J, Holmquist, K.G, Bell, J.M, Funk, B

“…Pollinators often visit several flowers in sequence on plants with large floral displays. This foraging pattern is expected to influence the rate of…”
Get full text

Influence of pollen transport dynamics on sire profiles and multiple paternity in flowering plants by Mitchell, Randall J, Wilson, William G, Holmquist, Karsten G, Karron, Jeffrey D

“…In many flowering plants individual fruits contain a mixture of half- and full- siblings, reflecting pollination by several fathers. To better understand the…”
Get full text

Pollinator visitation patterns strongly influence among-flower variation in selfing rate by Karron, Jeffrey D, Holmquist, Karsten G, Flanagan, Rebecca J, Mitchell, Randall J

“…BACKGROUND AND AIMS: Adjacent flowers on Mimulus ringens floral displays often vary markedly in selfing rate. We hypothesized that this fine-scale variation in…”
Get full text

New frontiers in competition for pollination by Mitchell, Randall J, Flanagan, Rebecca J, Brown, Beverly J, Waser, Nickolas M, Karron, Jeffrey D

“…BACKGROUND: Co-flowering plant species frequently share pollinators. Pollinator sharing is often detrimental to one or more of these species, leading to…”
Get full text

Pollination intensity and paternity in flowering plants by Christopher, Dorothy A, Mitchell, Randall J, Karron, Jeffrey D

“…Siring success plays a key role in plant evolution and reproductive ecology, and variation among individuals creates an opportunity for selection to act…”
Get full text

The timing of visits by large and small bees differentially affects pollination success in Mimulus ringens by Mitchell, Randall J., Starvaggi, Dana, Fitzgerald, Victor, Karron, Jeffrey D.

“…Premise Cross‐fertilization in most flowering plants is facilitated by mobile animals that transport pollen while foraging for floral rewards. The…”
Get full text

Increased relative abundance of an invasive competitor for pollination, Lythrum salicaria, reduces seed number in Mimulus ringens by Flanagan, Rebecca J, Mitchell, Randall J, Karron, Jeffrey D

“…When exotic plant species share pollinators with native species, competition for pollination may lower the reproductive success of natives by reducing the…”
Get full text

Among‐individual variation in flowering phenology affects flowering synchrony and mating opportunity by Shelton, Wendy R., Mitchell, Randall J., Christopher, Dorothy A., Jack, Loretha P., Karron, Jeffrey D.

“…Premise The timing and pattern of a plant's flowering can have important consequences for reproductive success. Variation in flowering phenology may influence…”
Get full text

Breeding Systems and Levels of Inbreeding Depression in Geographically Restricted and Widespread Species of Astragalus (Fabaceae) by Karron, Jeffrey D.

Get full text

A comparison of levels of genetic polymorphism and self-compatibility in geographically restricted and widespread plant congeners by Karron, Jeffrey D.

“…Evolutionary theory predicts low levels of genetic polymorphism and high levels of self-compatibility in plant species with small ranges and few individuals…”
Get full text

Ecology and evolution of plant-pollinator interactions by Mitchell, Randall J, Irwin, Rebecca E, Flanagan, Rebecca J, Karron, Jeffrey D

“…BACKGROUND: Some of the most exciting advances in pollination biology have resulted from interdisciplinary research combining ecological and evolutionary…”
Get full text

Interspecific competition for pollination lowers seed production and outcrossing in Mimulus ringens by Bell, John M., Karron, Jeffrey D., Mitchell, Randall J.

“…Sympatric plant species with similar flowering phenologies and floral mor- phologies may compete for pollination, and as a consequence potentially influence…”
Get full text

Herkogamy and mate diversity in the wild daffodil Narcissus longispathus: beyond the selfing-outcrossing paradigm in the evolution of mixed mating by Medrano, M., Requerey, R., Karron, J. D., Herrera, C. M.

“…Spatial separation of male and female reproductive structures (herkogamy) is a widespread floral trait that has traditionally been viewed as an adaptation that…”
Get full text

The influence of population density on outcrossing rates in Mimulus ringens by KARRON, J. D, THUMSER, N. N, TUCKER, R, HESSENAUER, A. J

“…The influence of population density on pollinator movements and outcrossing rates was studied in experimental arrays of Mimulus ringens (square-stemmed…”
Get full text

Effects of multiple competitors for pollination on bumblebee foraging patterns and Mimulus ringens reproductive success by Flanagan, Rebecca J., Mitchell, Randall J., Karron, Jeffrey D.

“…When co-occurring plant species overlap in flowering phenology they may compete for the service of shared pollinators. Competition for pollination may lower…”
Get full text

Interspecific pollinator movements reduce pollen deposition and seed production in Mimulus ringens (Phrymaceae) by Flanagan, Rebecca J, Mitchell, Randall J, Knutowski, Dustin, Karron, Jeffrey D

“…Movement of pollinators between coflowering plant species may influence conspecific pollen deposition and seed set. Interspecific pollinator movements between…”
Get full text

Multiple pollinator visits to Mimulus ringens (Phrymaceae) flowers increase mate number and seed set within fruits by Karron, Jeffrey D, Mitchell, Randall J, Bell, John M

“…The timing and effectiveness of pollinator visitation to flowers is an important factor influencing mating patterns and reproductive success. Multiple…”
Get full text

Breeding systems and levels of inbreeding depression in geographically restricted and widespread species of Astragalus (Fabaceae) by Karron, J.D

“…Several workers have suggested that species with restricted ranges and few individuals are more likely to be self-compatible and to exhibit low levels of…”
Get full text