Showing papers by "Guy F. Midgley published in 1992"

Photosynthetic responses of heliophilous Rhus species to environmental modification by invasive shrubs

Abstract: This study aimed to determine the effect of overtopping and shading by the alien invasive plant species Acacia cyclops on the gas exchange characteristics and photosynthetic capacity of Rhus glauca and R. lucida, both indigenous heliophilous shrub species in the western Cape Province of South Africa. Overtopped individuals of both indigenous species showed morphological and physiological changes generally consistent with widely reported shade effects. However, R. lucida showed an apparently rare combination of unchanged maximum photosynthetic rate and increased apparent quantum yield under shaded conditions (...)