Kappen, L 1983: Ecology and physiology of the Antarctic fruticose lichen Usnea sulphurea (Koenig) Th. Fries. - Polar Biology1: 249-255. [RLL List # 119-74 / Rec.# 9796] Keywords: ANTARCTIC/ USNEA/ ECOLOGY/ PHYSIOLOGY/ CHLOROPHYLL/ TEMPERATURE/ PHOTOSYNTHESIS/ ADAPTATION
Abstract: 9 figures. 1 table. [Both light and shade forms of this species "... differ by chlorophyll content and temperature dependency of net photosynthesis, which demonstrates an adaptive response of these forms to their environment."]