Laboratories and Research Support

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Greenhouse and Growth Chambers

Spray chamber at the National Wildlife Research CentrePlants are the main primary producers of terrestrial ecosystems and, together with algae, are important components of aquatic ecosystems. Many native plants are of high conservation value, either because they belong to rare taxa or because they are important food sources and provide habitats for other trophic levels, arthropods, amphibians, reptiles, birds and mammals. 

Native plants are exposed to pesticides and other contaminants that may impact their survival, growth and reproduction, and thus have impact on other wildlife that may depend on them for food or habitat.

Advancing research on phytotoxicity testing is helping to bridge the gap between artificial laboratory testing with crops, and testing with native plants under conditions that emulate plant communities in their natural environments. These tests seek to reproduce natural conditions in order to yield more accurate results and better inform decision making about the control of chemical substances.

Current research and methodology

Located at the National Wildlife Research Centre, the Greenhouse and Growth Chambers have recently contributed to the understanding of:

  • Growth Chamber at the National Wildlife Research CentreSublethal effects of herbicide use on native plants in terms of long-term recovery
  • The comparative effects of herbicides on communities of plants grown in mesocosms in the greenhouse and in outdoor conditions
  • The ability to measure sources of variability in phytotoxicity testing with herbicides
  • Effects of conventional and organic farming practices, habitat types and landscape features on biodiversity, including native plants, moths, other arthropods and birds
  • Evaluating the restoration potential of Middle Island (Lake Erie) ecosystems through a seed bank study and vegetation survey
  • Effects of vanadium and lanthanum on native plant species

Research undertaken in the greenhouse and growth chambers integrates a variety of approaches and directions to fulfill several distinct objectives. 

Some methods and equipment used include:

  • Track spray booth equipped with a TeeJet 8002E flat-fan nozzle (Spraying Systems)
  • Kinetic fluorescence CCD camera to measure chlorophyll fluorescence
  • Portable photosynthesis system
  • AP4 cycling diffusion porometer to measure stomatal conductance
  • Spectrometer photodiode light sensor (μmol m-2 s-1) to measure light intensity

Collaboration

Greenhouse at the National Wildlife Research CentreResearch is conducted in partnership with several graduate students at Carleton University and the University of Ottawa. At the international level, research is performed with students and research scientists from Denmark, Spain and France. 

Phytotoxicity testing aimed at improving pesticide risk assessment is carried out in collaboration with the Pest Management Regulatory Agency funded under the Pesticide Science Funds.

Using inorganic compounds, researchers develop and improve the testing of native plants, as part of the Chemicals Management Plan using the medium priority substances list.

Experts in laboratory

Further reading

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