Shuling Lin
Guangzhou University, China
Title: Phenological characteristics of Ficus microcarpa under climate range
Biography
Biography: Shuling Lin
Abstract
Relationship between plant phenology and climate change has become an important topic under global climate warming. Phenology is a plant growth progress that is largely driven by meteorological conditions. Phenological changes are vital indicators for changes in climate and other enviromental conditions. Ficus microcarpa is widely distributed throughout the tropic and subtropics. We recorded the flowering phenology and resource allocation of female flowers of F. microcarpa over a period of 12 months at the two edges of its range, Guangzhou, China and Townsville, Australia, and the results showed F. microcarpa exhibited different phenological patterns under different climate pattern. There were 1-4 crops in the year at the northern edge, Guangzhou, and most individual trees exhibited intra-tree asynchronous flowering, and typically bore many synconia at different developmental phases, especially during particularly cool dry months from November to March and hot wet months from August to September. On the contrary, F. microcarpa produced 1-3 crops per year, usually two at the southern edge, Townsville, and intra-tree asynchronous flowering rarely occurred. Phenological patterns of F. microcarpa in different environments were summarized according to previous studies and local climate characteristic, and Janzen’s hypotheses of adaptations to seasonality was tested and criticized. Then a supplementary hypothesis was presented: within-tree asynchronous flowering was adaptation to adverse conditions, including low temperature, violent rain, gale etc.