Heide-Jorgensen, HS/ Johnsen, I 1995: Analysis of surface structures of Cladonia mitis podetia in historic and recent collections from Greenland. - Canadian Journal of Botany73(3): 457-464. [RLL List # 159 / Rec.# 8166] Keywords: CLADINA/ PODETIA/ SEM/ SURFACES/ TEM/ UV LIGHT/ UV-B
Abstract: 14 fig. 2 tab. [Use of SEM and TEM to study recent and historic collections shows an increase in frequency since the 1970s of an unhealthy, brownish-coloured surface crust on the podetia. One possible explanation suggested is the UV-B radiation, which is known to have increased in the same time period.]