NDLI: An invasive dandelion unilaterally reduces the reproduction of a native congener through competition for pollination

Content Provider	Springer Nature Link
Author	Kandori, Ikuo Hirao, Toshihiro Matsunaga, Satoshi Kurosaki, Tsutomu
Copyright Year	2009
Abstract	The impact of invasive alien species on native species is of increasing global concern. Invasive plants have various negative effects on natives through competition; however, relatively little is known about competition for pollination. The relationship between Japanese native dandelions (Taraxacum spp.) and invasive congeners may be a typical case of such an interaction. For example, native dandelions are being replaced by invasive congeners, especially in urban and suburban areas of Japan. To explain this phenomenon, we hypothesized that when natives are mixed with attractive invasives, natives may suffer from reduced seed set because invasives deprive natives of pollinators or because pollinators frequently move between species, resulting in interspecific pollen transfer. To test this hypothesis, we studied the effect of the invasive dandelion T. officinale on the pollination and seed set of the native T. japonicum using artificial arrays of monospecific and mixed-species plots as well as natural populations. Taraxacum officinale attracted more pollinator visits, perhaps because it produced more nectar than T. japonicum. The number of pollinator visits to T. japonicum was reduced when the congeners were grown together, and pollinators moved frequently between the two species. The proportion of seed set for T. japonicum was reduced in the presence of T. officinale in both artificial arrays and natural populations. These results support our hypothesis that interspecific competition for pollination plays an important role in the recent replacement of native dandelions by invasive congeners in Japan. Because invasive dandelions are apomicts, negative effects are incurred only by sexual natives. Thus, this system can be recognized as a rare case of interspecific interaction through pollination.
Starting Page	559
Ending Page	569
Page Count	11
File Format	PDF
ISSN	00298549
Journal	Oecologia
Volume Number	159
Issue Number	3
e-ISSN	14321939
Language	English
Publisher	Springer-Verlag
Publisher Date	2009-01-20
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Dandelion Wars Exploitation competition Interference competition Pollinator Taraxacum japonicum Taraxacum officinale Plant Sciences Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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Alien pollen grains interfere with the reproductive success of native congener

Effective range of reproductive interference exerted by an alien dandelion, Taraxacum officinale, on a native congener

Variation in the strength of reproductive interference from an alien congener to a native species in Taraxacum

Comparison of mechanisms of reproductive interference in Taraxacum

Differential effects of reproductive interference by an alien congener on native Taraxacum species

Alien dandelion reduces the seed-set of a native congener through frequency-dependent and one-sided effects

Presence of an invasive plant species alters pollinator visitation to a native

Floral neighborhood influences pollinator assemblages and effective pollination in a native plant

Competition for pollination: effects of pollen of an invasive plant on seed set of a native congener

An invasive dandelion unilaterally reduces the reproduction of a native congener through competition for pollination

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Alien pollen grains interfere with the reproductive success of native congener

Effective range of reproductive interference exerted by an alien dandelion, Taraxacum officinale, on a native congener

Variation in the strength of reproductive interference from an alien congener to a native species in Taraxacum

Comparison of mechanisms of reproductive interference in Taraxacum

Differential effects of reproductive interference by an alien congener on native Taraxacum species

Alien dandelion reduces the seed-set of a native congener through frequency-dependent and one-sided effects

Presence of an invasive plant species alters pollinator visitation to a native

Floral neighborhood influences pollinator assemblages and effective pollination in a native plant

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An invasive dandelion unilaterally reduces the reproduction of a native congener through competition for pollination