Does interspecific competition alter effects of early season ozone exposure on plants from wet grasslands? Results of a three-year experiment in open-top chambers

Environmental Pollution
A E TonneijckT A Dueck

Abstract

Chronic effects of ozone on wet grassland species early in the growing season might be altered by interspecific competition. Individual plants of Holcus lanatus, Lychnis flos-cuculi, Molinia caerulea and Plantago lanceolata were grown in monocultures and in mixed cultures with Agrostis capillaris. Mesocosms were exposed to charcoal-filtered air plus 25 nl l(-1) ozone (CF+25), non-filtered air (NF), non-filtered air plus 25 nl l(-1) ozone (NF+25) and non-filtered air plus 50 nl l(-1) ozone (NF+50) early in the growing seasons of 2000 through 2002. Ozone-enhanced senescence and visible foliar injury were recorded on some of the target plants in the first year only. Ozone effects on biomass production were minimal and plant response to ozone did not differ between monocultures and mixed cultures. After three years, above-ground biomass of the plants in mixed culture compared to monocultures was three times greater for H. lanatus and two to four times smaller for the other species.

References

Aug 6, 2000·Environmental and Experimental Botany·J FranzaringT A Dueck

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Citations

Mar 19, 2013·Environmental Pollution·T M W J van GoethemM A J Huijbregts
Apr 17, 2015·Environmental Science and Pollution Research International·Benchohra MaamarMohammed Ait hammou
Sep 26, 2006·Environmental Pollution·M R AshmoreS Toet
Nov 18, 2005·Environmental Pollution·J BenderH J Weigel
Mar 15, 2006·Environmental Pollution·R H ThwaitesR J Pakeman

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