Pollination is less random so plant can more readily

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pollination is less random, so plant can more readily avoid not finding mates (i.e., avoid positive density-dependence Topic 9 ). 2. Plants may be specialized to attract particular species of pollinators, or plants may be very general, having a number of pollinator species. Pollinator species also may be specialized or generalized. Flower form is adapted to different pollinator types; this can vary within the same clade (group of related species). slide 3. Sometimes only one pollinator species pollinates one plant species, so the mutualism is obligatory for both species. a. Darwin gave a famous example: Madagascar Star Orchid produces nectar in tubes 30cm long. A sphinx moth is the pollinator and has a proboscis (a moth “tongue” to get nectar) of the same length. slide b. Another example of obligatory mutualism is yucca and yucca moth (2 species of moth). slide Moth lays eggs only in yucca. Yucca moth is the only pollinator. The plant has 30% fewer seeds because of moth herbivory, but the total effect is still +.
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