NDLI: There goes the neighborhood: apparent competition between invasive and native orchids mediated by a specialist florivorous weevil

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There goes the neighborhood: apparent competition between invasive and native orchids mediated by a specialist florivorous weevil

Content Provider	Springer Nature Link
Author	Recart, Wilnelia Ackerman, James D. Cuevas, Ana A.
Copyright Year	2012
Abstract	The exotic orchid, Spathoglottis plicata, has naturalized and spread rapidly over Puerto Rico where it is generally considered to be innocuous. It is abundant and occupies the same habitat as the native orchid, Bletia patula. The two are hosts to the same native weevil, Stethobaris polita, a specialist on orchid flowers. We ask whether the weevils mediate apparent competition between the two orchids. We monitored weevil populations, floral damage and fruit set in B. patula in the presence and absence of S. plicata. We also experimentally tested whether weevils preferred one species over the other. Finally, we modeled the distribution of both orchid species to predict the extent by which the two species may interact in Puerto Rico. We found a significantly lower number of weevils and a higher fruit set for B. patula where S. plicata is absent, indicative that apparent competition is occurring. The choice experiments show that weevils prefer flowers of S. plicata over those of B. patula, but B. patula still sustained considerable damage. The current distribution of the native B. patula is nearly limited to the northern karst region of Puerto Rico. The naturalized S. plicata has a broader range and the models predict that its distribution will strongly overlap with that of B. patula. We expect the S. plicata invasion to continue and affect native orchids through apparent competition as long as the presence of S. plicata maintains elevated weevil populations. Thus, even seemingly harmless invasive orchids can have subtle but significant negative consequences.
Starting Page	283
Ending Page	293
Page Count	11
File Format	PDF
ISSN	13873547
Journal	Biological Invasions
Volume Number	15
Issue Number	2
e-ISSN	15731464
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-07-25
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Herbivory Indirect effects Multiple species interactions Florivory Apparent competition Biological invasions Ecology Freshwater & Marine Ecology Plant Sciences Developmental Biology
Content Type	Text
Resource Type	Article
Subject	Ecology Ecology, Evolution, Behavior and Systematics

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There goes the neighborhood: apparent competition between invasive and native orchids mediated by a specialist florivorous weevil

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