Payne R , Stevens CJ , Dise NB , Gowing DJ , Pilkington MG , Phoenix GK , Emmett BA
نویسندگان
چکیده
17 Air pollutants are recognised as important agents of ecosystem change but few studies consider 18 the effects of multiple pollutants and their interactions. Here we use ordination, constrained cluster 19 analysis and indicator value analyses to identify potential environmental controls on species 20 composition, ecological groupings and indicator species in a gradient study of UK acid grasslands. The 21 community composition of these grasslands is affected by climate, grazing, ozone exposure and nitrogen 22 deposition, with evidence for an interaction between the ecological impacts of base cation and nitrogen 23 deposition. Ozone is a key agent in species compositional change but is not associated with a reduction 24
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