The evolution of self‐fertilization and inbreeding depression under pollen discounting and pollen limitation [PDF]
AbstractWe model the evolution of plant mating systems under the joint effects of pollen discounting and pollen limitation, using a dynamic model of inbreeding depression, allowing for partial purging of recessive lethal mutations by selfing. Stable mixed mating systems occur for a wide range of parameter values with pollen discounting alone.
E, Porcher, R, Lande
openaire +2 more sources
The neonicotinoid insecticide Imidacloprid repels pollinating flies and beetles at field-realistic concentrations [PDF]
Neonicotinoids are widely used systemic insecticides which, when applied to flowering crops, are translocated to the nectar and pollen where they may impact upon pollinators.
Amy H. Easton +22 more
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Atmospheric dispersion of airborne pollen evidenced by near-surface and columnar measurements in Barcelona, Spain [PDF]
Hourly measurements of pollen near-surface concentration and lidar-derived profiles of particle backscatter coefficients and of volume and particle depolarization ratios during a 5-day pollination event observed in Barcelona, Spain, between 27 – 31 March,
Alarcón Jordán, Marta +7 more
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Coexistence induced by pollen limitation in flowering-plant species [PDF]
We report a novel mechanism for species coexistence that does not invoke a trade-off relationship in the case of outbreeding flowering plants. Competition for pollination services may lead to interspecific segregation of the timing of flowering among plants. This, in turn, sets limits on the pollination services, which restrain the population growth of
R, Ishii, M, Higashi
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Duodichogamy and androdioecy in the Chinese Phyllanthaceae Bridelia tomentosa [PDF]
Flowering plants commonly separate male and female function in time, but rarely are the two stages synchronized within and among individuals. One such temporal mating system is duodichogamy in which each plant produces two batches of male flowers that ...
Luo, Shixiao +2 more
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Uniform female-biased sex ratios in alpine willows [PDF]
Premise of the study: The development of biased sex ratios in dioecious plant species has been ascribed to either (1) factors influencing differential adult mortality of male and female plants or (2) factors acting at an early life stage that determine ...
Hik, David S., Myers-Smith, Isla H.
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Pollen limitation is predicted to be particularly severe in tundra habitats. Numerous reproductive patterns associated with alpine and arctic species, particularly mechanisms associated with reproductive assurance, are suggested to be driven by high ...
Justin R Fulkerson +2 more
doaj +1 more source
The effect of experimental pollinator decline on pollinator‐mediated selection on floral traits
Human‐mediated environmental change, by reducing mean fitness, is hypothesized to strengthen selection on traits that mediate interactions among species.
Kaitlyn S. Brown, Christina M. Caruso
doaj +1 more source
Extremely long-lived stigmas allow extended cross-pollination opportunities in a high Andean plant. [PDF]
High-elevation ecosystems are traditionally viewed as environments in which predominantly autogamous breeding systems should be selected because of the limited pollinator availability.
Cristian Torres-Díaz +6 more
doaj +1 more source
Chronologies for Recent Peat Deposits Using Wiggle-matched Radiocarbon Ages: Problems with Old Carbon Contamination [PDF]
Dating sediments which have accumulated over the last few hundred years is critical to the calibration of longer-term paleoclimate records with instrumental climate data.
Charman, D.J., Garnett, M.H.
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