Das, P./ S. Joshi/ J. Rout/ D. K. Upreti 2013: Lichen diversity for environmental stress study: Application of index of atmospheric purity (IAP) and mapping around a paper mill in Barak Valley, Assam, Northeast India. - Tropical Ecology54(3): 355-364. [RLL List # 232 / Rec.# 34829] Keywords: Ecological index/ Epiphytic lichens/ Frequency and coverage/ IAP/ Paper mill/ Pollution zone map
Abstract: The paper discusses the application of lichen diversity in the form of Index of Atmospheric Purity (IAP) for environmental stress study (air pollution) around a paper mill in Assam, India. Seventeen sites were selected within an area of approximately 1800 km2 around the mill to prepare a stress zone map using IAP; the values ranged between 17 and 113, delineating the area into five zones. The zones are categorised as zone II (IAP: 1