Infodoc : Sciences, Techniques et Culture

In subtropical southeast Queensland, Leaf Area and Internode Length of foliage shoots of dicotyledonous overstorey species become greater in magnitude as soils of plant communities decrease in nutrients. The overstorey of health open-forest and heathlands grows during summer to produce large leaves with long internodes, whereas the overstoreys of the savanna and rainforest edaphic complexes grow during spring and autumn. With decreased solar radiation (transmitted through the gaps in the overstorey canopy), reduced development in Leaf Areas has been observed in nutrient-rich ecosystems; little change in Leaf Specific Area and Internode Length (except in the cool-temperature Nothofagus forest) of dicotyledonous foliage shoots of the understorey stratum has occurred at the same time. Un[...]

In subtropical southeast Queensland, Leaf Area and Internode Length of foliage shoots of dicotyledonous overstorey species become greater in magnitude as soils of plant communities decrease in nutrients. The overstorey of health open-forest and heathlands grows during summer to produce large leaves with long internodes, whereas the overstoreys of the savanna and rainforest edaphic complexes grow during spring and autumn. With decreased solar radiation (transmitted through the gaps in the overstorey canopy), reduced development in Leaf Areas has been observed in nutrient-rich ecosystems; little change in Leaf Specific Area and Internode Length (except in the cool-temperature Nothofagus forest) of dicotyledonous foliage shoots of the understorey stratum has occurred at the same time. Understorey plants in nutrient-poor ecosystems produce small leaves with very short internodes.