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dc.contributor.authorHerron-Sweet, Christina R.
dc.contributor.authorLehnhoff, Erik A.
dc.contributor.authorBurkle, Laura A.
dc.contributor.authorLittlefield, Jeffrey L.
dc.contributor.authorMangold, Jane M.
dc.date.accessioned2016-08-10T16:16:36Z
dc.date.available2016-08-10T16:16:36Z
dc.date.issued2016-02
dc.identifier.citationHerron-Sweet, Christina R., Erik A. Lehnhoff, Laura A. Burkle, Jeffrey L. Littlefield, and Jane M. Mangold. “Temporal- and Density-Dependent Impacts of an Invasive Plant on Pollinators and Pollination Services to a Native Plant.” Edited by K. Haynes. Ecosphere 7, no. 2 (February 2016): n/a–n/a. doi:10.1002/ecs2.1233.en_US
dc.identifier.issn2150-8925
dc.identifier.urihttps://scholarworks.montana.edu/xmlui/handle/1/9984
dc.description.abstractPollinators and pollination services are under threat globally, and invasive plants have been implicated in their decline. Results of previous studies suggest that consequences of invasion for pollinators and plant–pollinator interactions are context specific. Investigating factors such as the density of an invasive plant and its phenology may provide a nuanced understanding of invasive species impacts. We conducted a 2-yr study in Montana to investigate how local pollinator abundance, richness, community composition, and visitation patterns varied with invasive Centaura stoebe density and phenology, and whether C. stoebe altered the reproduction of a co-flowering native plant, Heterotheca villosa, through changes in pollinator visitation. In an observational study, we found that during its peak bloom in August, Centaurea stoebe provided abundant floral resources to late-season pollinators. However, prior to C. stoebe bloom, native floral density and pollinator abundance and richness of these plots were lower compared to plots where C. stoebe was low or absent. Pollinator community composition in plots without C. stoebe was different compared to plots with C. stoebe (both high and low C. stoebe density), and these differences in pollinator composition strongly depended on the time of season. In an experimental study, we found that there was little evidence of competition between C. stoebe and H. villosa for pollinators at low relative densities of C. stoebe. Using experimental pollen supplementation, we observed no evidence of pollen limitation of seed set in H. villosa with increasing density of experimentally added C. stoebe. Our results suggest that the impact of an invasive plant on pollinators and plant–pollinator interactions depends on the relative density of the invasive plant and the timing of its bloom. Differences in pollinator visitation patterns over the growing season suggest that although C. stoebe provides abundant resources to late-season pollinators, displacement of native plants at high C. stoebe density may indirectly harm pollinators that are active before C. stoebe blooms or that prefer native plants. Based on our results, restricting C. stoebe to low densities may help mitigate negative repercussions to native plant reproduction and may even be beneficial to some pollinators.en_US
dc.description.sponsorshipUnited States Department of Agriculture-National Institute of Food and Agriculture (USDA-NIFA), award #2012-67014-19365en_US
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/legalcodeen_US
dc.titleTemporal and density dependent impacts of an invasive plant on pollinators and pollination services to a native planten_US
dc.typeArticleen_US
mus.citation.extentfirstpagee01233en_US
mus.citation.issue2en_US
mus.citation.journaltitleEcosphereen_US
mus.citation.volume7en_US
mus.identifier.categoryLife Sciences & Earth Sciencesen_US
mus.identifier.doi10.1002/ecs2.1233en_US
mus.relation.collegeCollege of Agricultureen_US
mus.relation.collegeCollege of Letters & Scienceen_US
mus.relation.departmentEcology.en_US
mus.relation.departmentLand Resources & Environmental Sciences.en_US
mus.relation.universityMontana State University - Bozemanen_US
mus.data.thumbpage8en_US


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