Interactions between invasive plants and their natural enemies

Project Description

Non-native plants are a serious environmental and economic problem in southern Canada. Many of these plants initially may have gained an advantage by escaping natural enemies (insects and pathogens) that were unable to disperse with them to North America. However, after colonizing their new range, most of these plants are susceptible to attack by North American species, or by old enemies which eventually follow them from their native range. We are investigating factors influencing whether invasive plants suffer significant levels of attack here in their new range. First, we are investigating whether Asteraceae near their northern range margin experience less leaf and seed damage than southern populations. Second, we are investigating whether damage to Canada Thistle declines with distance from existing populations, and whether this damage has a significant impact on performance. Finally, we are studying whether seed predation by rodents, birds, and earthworms varies among habitats or species.

Additional Scientific Information

1) We are sampling seeds and leaves of Asteraceae along a gradient from near KSR to Cochrane and Moosonee. Results to date suggest that damage to some species does indeed decline with latitude, but this pattern is far from universal; we are expanding our sampling to better describe these patterns.

2) We intend to set up two experiments at KSR this year using the model species Cirsium arvense. We will use netting to exclude herbivores, with controls, and will measure damage and growth responses. We also will transplant rosettes at different distances from established populations and measure damage. We will combine these results with surveys of natural populations.

3) We will set up a series of controlled experiment in which we use cages to exclude vertebrates and/or earthworms from plots to which we have added known numbers of seeds of  locally-occurring native and exotic species. Plots will be less than 1m2, and will be placed in both field and forest habitats. Together, these data will allow us to produce estimates of herbivore damage and seed predation to a variety of native and exotic species, which we will then attempt to explain using models incorporating population and species characteristics.

Principal InvestigatorPeter M. Kotanen
Researcher(s): Colin Cassin, Krystal Nunes, Romeo Samson

 

Vertebrate herbivores by night and day, KSR, 2013

Vertebrate herbivores by night and day, KSR, 2013

Refereed Publications

1)      Kambo, D. and P.M. Kotanen (2013) Latitudinal trends in herbivory and performance of an invasive species, common burdock (Arctium minus). Biological Invasions; accepted 1 June 2013. DOI: 10.1007/s10530-013-0506-z

2)      Dunn, A.M., M.E. Torchin, M.J. Hatcher, P.M. Kotanen, D.M. Blumenthal, J.E. Byers, C.A.C. Coon, V.M. Frankel, R.D. Holt, R.A. Hufbauer, A.R. Kanarek, K.A. Schierenbeck, L.M. Wolfe, and S. E. Perkins (2012) Indirect effects of parasites on invasions. Functional Ecology 26: 1262-1274.

3)      Hill S.B. and P.M. Kotanen (2011) Biotic interactions experienced by a new invader: effects of its close relatives at the community scale. Botany 90: 35-42

Manuscripts in press

1)      Colautti, R.I., O. Bossdorf, S.J. Franks, R.A. Hufbauer, M. Torchin, and P.M. Kotanen. The Global Garlic Mustard Field Survey: challenges and opportunities of a unique, large-scale collaboration for invasion biology. Neobiota. Accepted 15 July 2013.

Invited Lectures

1)    Kotanen, P.M. (2013) Latitudinal and local variation in interactions between non-native plants and their old and new enemies. Annual meeting of the Entomological Society of America, Austin, Texas.

2)    Kotanen, P.M. (2013) Interactions between invasive plants and their natural enemies in marginal populations. Annual Meeting of the Ontario Invasive Plant Council, Orillia.

Papers and Posters Presented at Meetings and Symposia

1)      Kotanen, P.M. (2013) Latitudinal clines in damage to invasive plants by their natural enemies.12th International Conference on the Ecology and Management of Alien Plant Invasions, Pirenópolis, Brazil.

2)      Stajerova, K, P. Pysek, V. Jarosík, M. Hejda, D. Blumenthal, R.M. Callaway, D.L. Larson, P. Kotanen, and U. Schaffner (2013) Impact of Leucanthemum vulgare on resident plant communities associated with introduction to novel environment. 12th International Conference on the Ecology and Management of Alien Plant Invasions, Pirenópolis, Brazil. (poster)

3)      Stajerova, K, P. Pysek, V. Jarosík, M. Hejda, D. Blumenthal, R.M. Callaway, D.L. Larson, P. Kotanen, and U. Schaffner (2013) A transcontinental biogeographic comparison of native and invasive dominants: Are invasives indeed doing something different than natives?. Annual meeting of the Ecological Society of America, Portland, OR. (poster)

4)      Cassin, C.M. and P.M. Kotanen (2013) Decreases in herbivore damage approaching northern range limits in native and exotic Asteraceae. Annual meeting of the Ecological Society of America, Minneapolis, MN (poster).

5)      Nunes, K.A.M. and P.M. Kotanen (2013) Spatial variation in occurrence of biological control agents of the noxious weed Cirsium arvense. Annual meeting of the Ecological Society of America, Minneapolis, MN (poster).

6)      Lee Y. and P.M. Kotanen (2013) Sources of latitudinal variation in herbivory and performance of Arctium minus (burdock) in it invaded range. Annual meeting of the Canadian Society for Ecology and Evolution, Kelowna BC.

7)      Cassin , C.M. and P.M. Kotanen (2013) Decreases in herbivore damage approaching northern range limits in native & exotic Asteraceae. Annual meeting of the Canadian Society for Ecology and Evolution, Kelowna BC (poster).

8)      Nunes, K.A.M. and P.M. Kotanen (2013)  Spatial variation in aboveground herbivory due to biocontrol agents of the noxious weed Cirsium arvense . Annual meeting of the Canadian Society for Ecology and Evolution, Kelowna BC (poster).

9)      Kotanen, P.M. (2012) Latitudinal variation in interactions between invasive plants and their natural enemies. Neobiota 2012, Pontevedra, Spain.

10)   Stajerova K., P. Pysek, V. Jarosik, M. Hejda, D. Blumenthal, R. Callaway, D. Larson, P.M. Kotanen, and U. Schaffner (2012). A transcontinental biogeographic comparison of native and invasive dominants: Are invasives indeed doing something different than natives? Neobiota 2012, Pontevedra, Spain (poster).

11)   Kotanen, P.M. and D. Kambo (2012) Interactions between invasive plants and their natural enemies at range margins. Terrestrial Invasive Plant Species Conference, Sault Ste Marie, ON.

12)   Kambo D. and P.M. Kotanen (2012) Differences in performance and herbivory along a latitudinal gradient for common burdock (Arctium minus). Annual meeting of the Ecological Society of America, Portland, OR.

13)   Kambo D. and P.M. Kotanen (2012) Differences in performance and herbivory along a latitudinal gradient for common burdock (Arctium minus). First Joint Congress on Evolutionary Biology, Ottawa, ON.

 

 Research at KSR | Home

Comments are closed.