关键词: 城市行道树, 大气TSP污染, 光合生理参数, 气孔限制, 芒果, 安康水库, 浮游藻类, 群落结构, 环境因子, 水质状况

Abstract: With the development of urbanization, total suspended particulate (TSP) pollution is getting serious, and the normal physiological processes of urban vegetation are profoundly affected while adsorbing and purifying the particulates. In this study, four areas were selected, i.e., Tingxi reservoir (clean control area), Xiamen University (cultural and educational area), Xianyue (business area), and Haicang (industrial area), with their atmospheric TSP concentrations and the photosynthetic parameters of street Mango (Mangifera indica) trees monitored in April and May, 2009. The daily average concentration of TSP in Tingxi, Xiamen University, Xianyue, and Haicang was 0.061, 0.113, 0.120 and 0.205 mg·m^-3, respectively, and the impact of TSP stress on M. indica was in the sequence of Haicang > Xianyue > Xiamen University > Tingxi. TSP pollution negatively affected the net photosynthetic rate, stomatal conductance, and transpiration rate of M. indica, and induced intercellular CO₂ concentration changed significantly. High TSP concentration could cause the decline of net photosynthetic rate via stomatal limitation.

Key words: urban street tree, air TSP pollution, photosynthetic parameters, stomatal limitation, Mango (Mangifera indica), Ankang Reservoir, phytoplankton, community structure, environmental factor, water quality.