Main content

The effect of simulated winter warming spells on Canada fleabane [Conyza canadensis (L.) Cronq. var. canadensis] seeds and plants

Show simple item record Tozzi, E. Lyons, E.M. Van Acker, R.C. 2020-04-22T20:52:45Z 2020-04-22T20:52:45Z 2014 2014 2014
dc.description.abstract Experiments were establish at three sites in southern Ontario, Canada in 2009 and 2010 to determine the possible effect of winter warming spells applied in either January, February or March on seed, seedlings, or rosettes of Canada fleabane including effects on winter survival, fecundity, above-ground biomass, and flowering timing. Warming spells reduced survival of fall-established rosettes and fall established seedlings. Warming spells occurring late in winter (March) had a greater effect where March warming spells reduced the survival of rosettes and seedlings on average by 53% and 80%, respectively. In addition, overwintering Canada fleabane plants (rosettes or seedlings) exposed to warming spells flowered earlier (between 29 and71 days earlier). This study also confirms that Canada fleabane seed has little or no dormancy and that the great majority of seed recruits (either in fall or spring) within a given season (between 84% and 93%). We also determined that timing of seed shed in the fall significantly affects the proportion of seedlings emerging either in the spring or fall with late shed favoring seed overwintering and spring seedling emergence. The results of this study suggest that winter warming spells, especially later in the winter (into early spring), may limit the success of Canada fleabane and in particular its success as a winter annual. en_US
dc.language.iso en en_US
dc.publisher Canadian Science Publishing en_US
dc.subject recruitment en_US
dc.subject facultative winter annuals en_US
dc.subject warming spells en_US
dc.subject climate change en_US
dc.subject Conyza Canadensis en_US
dc.title The effect of simulated winter warming spells on Canada fleabane [Conyza canadensis (L.) Cronq. var. canadensis] seeds and plants en_US
dc.type Article en_US Department of Plant Agriculture en_US
dc.rights.license All items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated.
dcterms.relation Tozzi, E., Lyons, E. M. and Van Acker, R. C. 2014. The effect of simulated winter warming spells on Canada fleabane [Conyza Canadensis(L.) Cronq. var. canadensis] seeds and plants. Can. J. Plant Sci. 94: 963-969.

Files in this item

Files Size Format View Description
TozziEtAl_cjps2013_302.pdf 366.9Kb PDF View/Open PDF document

This item appears in the following Collection(s)

Show simple item record

The library is committed to ensuring that members of our user community with disabilities have equal access to our services and resources and that their dignity and independence is always respected. If you encounter a barrier and/or need an alternate format, please fill out our Library Print and Multimedia Alternate-Format Request Form. Contact us if you’d like to provide feedback:  (email address)