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Terrestrial Effects Research Facilities

WED plant growth facilities at Corvallis allow us to conduct experiments on the effects of a wide variety of environmental stresses on terrestrial systems. These highly-adaptable facilities have been used to address critical questions of national and international importance concerning the ecological risks to terrestrial plants from pollutants and other environmental stresses. The facilities have been used to carefully control exposures to a criteria air pollutants (O3, SO2, NOx), greenhouse gases (CO2), acidic precipitation, organic vapors, climate change (elevated temperature, drought), ultraviolet-B radiation, chemical pesticides, heavy metals and toxic chemicals. Climatic and soil environmental monitoring and control capabilities range from ambient conditions in open-air plots with environmental conditions carefully monitored, to controlled temperature greenhouses, growth chambers, open-top field chambers for control of gaseous air pollutants and precipitation, and closed outside chambers or "mesocosms" with complete control of air temperature, humidity, CO2 and gaseous pollutant concentrations, as well as soil moisture and fertility under natural sunlight. The WED facilities are used to evaluate ecological responses at varied scales, from those of single plants growing in pots to populations of plants growing in mesocosms containing reconstructed soils with full compliments of associated soil and litter organisms.

WED's mesocosms
which allow plants
to grow outdoors
in ambient or

Corn plants for herbicide
study growing in
outside nursery area


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