TY - GEN TY - GEN T1 - On the effect of air pollution on nitrogen fixation in lichens JF - Reports from the Kevo Subarctic Research Station SP - 42 OP - 46 A1 - Kallio, Sinikka A2 - Varheenmaa, Tuula LA - eng YR - 1974 UL - https://kansalliskirjasto.finna.fi/Record/arto.013294762 AB - Abstract: Clear decrease (80-90 %) of acetylene reduction in Stereocaulon paschale and Nephroma arcticum was observed in the polluted city area of Turku (SW. Finland) within a period of three - four weeks, while nitrogenase activity remained unchanged in the specimens outside the city area. Carbon dioxide fixation in these lichens lowered 20-50 %. KW - 1970-luku KW - 1970-talet KW - kasvitiede KW - jäkälät KW - kasviekologia KW - ilman epäpuhtaudet KW - yhteyttäminen KW - typpi KW - botanik KW - lavar KW - växtekologi KW - orenheter i luften KW - assimilation (botanik) KW - kväve KW - Suomi KW - Turku KW - Finland KW - Åbo ER -