Search Results - "Thomson, James D."

Flowering phenology, fruiting success and progressive deterioration of pollination in an early-flowering geophyte by Thomson, James D.

“…Spatio-temporal patterns of snowmelt and flowering times affect fruiting success in Erythronium grandiflorum Pursh (Liliaceae) in subalpine western Colorado,…”
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An examination of synchrony between insect emergence and flowering in Rocky Mountain meadows by Forrest, Jessica R. K, Thomson, James D

“…One possible effect of climate change is the generation of a mismatch in the seasonal timing of interacting organisms, owing to species-specific shifts in…”
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Heterostyly promotes disassortative pollination and reduces sexual interference in Darwin's primroses: evidence from experimental studies by Keller, Barbara, Thomson, James D, Conti, Elena, Kudo, Gaku

“…Different strategies to reduce selfing and promote outcrossing have evolved in hermaphroditic flowers. Heterostyly, a complex floral polymorphism that occurs…”
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Fur versus Feathers: Pollen Delivery by Bats and Hummingbirds and Consequences for Pollen Production by Muchhala, Nathan, Thomson, James D.

“…One floral characteristic associated with bat pollination (chiropterophily) is copious pollen production, a pattern we confirmed in a local comparison of…”
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Trade‐off mitigation: a conceptual framework for understanding floral adaptation in multispecies interactions by Ohashi, Kazuharu, Jürgens, Andreas, Thomson, James D.

“…ABSTRACT Explanations of floral adaptation to diverse pollinator faunas have often invoked visitor‐mediated trade‐offs in which no intermediate, generalized…”
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Explaining evolutionary shifts between bee and hummingbird pollination: convergence, divergence, and directionality by Thomson, J.D, Wilson, P

“…In certain angiosperm genera, closely related species have diverged from one another to converge on different pollination syndromes, whereas species with…”
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Effects of climate change on phenologies and distributions of bumble bees and the plants they visit by Pyke, Graham H., Thomson, James D., Inouye, David W., Miller, Timothy J., Peters, D. P. C.

“…Surveys of bumble bees and the plants they visit, carried out in 1974 near the Rocky Mountain Biological Laboratory in Colorado, were repeated in 2007, thus…”
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Trapline foraging by pollinators: its ontogeny, economics and possible consequences for plants by Ohashi, Kazuharu, Thomson, James D

“…BACKGROUND: Trapline foraging (repeated sequential visits to a series of feeding locations) has been often observed in pollinators collecting nectar or pollen…”
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Going to great lengths: selection for long corolla tubes in an extremely specialized bat–flower mutualism by Muchhala, Nathan, Thomson, James D.

“…In a hypothesis that has remained controversial since its inception, Darwin suggested that long-tubed flowers and long-tongued pollinators evolved together in…”
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Does pathogen spillover from commercially reared bumble bees threaten wild pollinators? by Otterstatter, Michael C, Thomson, James D

“…The conservation of insect pollinators is drawing attention because of reported declines in bee species and the 'ecosystem services' they provide. This issue…”
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Contact networks and transmission of an intestinal pathogen in bumble bee (Bombus impatiens) colonies by Otterstatter, Michael C, Thomson, James D

“…In socially living animals, individuals interact through complex networks of contact that may influence the spread of disease. Whereas traditional…”
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Flowering phenology in subalpine meadows: Does climate variation influence community co-flowering patterns? by Forrest, Jessica, Inouye, David W., Thomson, James D.

“…Climate change is expected to alter patterns of species co-occurrence, in both space and time. Species-specific shifts in reproductive phenology may alter the…”
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Pollination Syndromes and Floral Specialization by Fenster, Charles B., Armbruster, W. Scott, Wilson, Paul, Dudash, Michele R., Thomson, James D.

“…Floral evolution has often been associated with differences in pollination syndromes. Recently, this conceptual structure has been criticized on the grounds…”
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Plight of the bumble bee: Pathogen spillover from commercial to wild populations by Colla, Sheila R., Otterstatter, Michael C., Gegear, Robert J., Thomson, James D.

“…Pathogen spread or ‘spillover’ can occur when heavily infected, domestic hosts interact with closely-related wildlife populations. Commercially-produced bumble…”
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Specialist pollinators deplete pollen in the spring ephemeral wildflower Claytonia virginica by Parker, Alison J., Williams, Neal M., Thomson, James D.

“…Pollinators that collect pollen – and specifically, pollen‐specialist bees – are often considered to be the best pollinators of a (host) plant. Although pollen…”
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Progressive deterioration of pollination service detected in a 17-year study vanishes in a 26-year study by Thomson, James D.

“…• Widespread reports of declining populations of pollinators have raised concerns that plant populations may be incurring increasing shortfalls in pollination,…”
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Constrained lability in floral evolution: counting convergent origins of hummingbird pollination in Penstemon and Keckiella by Wilson, Paul, Wolfe, Andrea D., Armbruster, W. Scott, Thomson, James D.

“…In the clade of Penstemon and segregate genera, pollination syndromes are well defined among the 284 species. Most display combinations of floral characters…”
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Activity and abundance of bumble bees near Crested Butte, Colorado: diel, seasonal, and elevation effects by PYKE, GRAHAM H., INOUYE, DAVID W., THOMSON, JAMES D.

“…1. We revisited bumble bee survey data collected by Pyke in 1974 (Pyke, Ecology, 63, 555-573, 1982) to evaluate seasonal changes in abundances of bumble bees…”
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Flower Choice and Learning in Foraging Bumblebees: Effects of Variation in Nectar Volume and Concentration by Cnaani, Jonathan, Thomson, James D., Papaj, Daniel R.

“…Bees collect food from flowers that differ in morphology, color, and scent. Nectar‐seeking foragers can rapidly associate a flower's cues with its…”
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Pollinator experience, neophobia and the evolution of flowering time by Forrest, Jessica, Thomson, James D

“…Environmental changes, such as current climate warming, can exert directional selection on reproductive phenology. In plants, evolution of earlier flowering…”
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