Study on eco-effect of coast shield forest community at the South Sea of Guangzhou
In this paper,we studied the typical coast shield forest community,bio-absorbing and accumulating C,N,S and trace ele-ments Pb,Cd,Cu,monitoring of biological communities.The result indicated that mean biomass and NPP on woodland had reached with 10.7 t?hm-2 and 2.5 t hm-2 a-1 separately for the 5-6 age forest community and the forest community has behaved the character of speed growth.Mean annual increase mete of CO2,NO2 and SO2 on woodland was remarkable and had reached with 4.2 t?hm-2,27.1 kg?hm-2 and 3.4 kg?hm-2 separately,and annual bio-fix of the Pb,Cd and Cu was of 13.2 g?hm-2,4.4 g?hm-2 and 0.1 g?hm-2 separately in the coast shield forest.The environment function has got initial results that must not supersede for the ecological safe of coast line.Mean net photosynthetic rate of preponderance species had reached with 9.8 ?mol?m-2?s-1 under high temperature intimidate at rainy season daylight in the motorway network of forest.And daily peak photosynthetic rate of Ficus altissimahad reached with 14.3 ?mol?m-2?s-1 that was more than that of Bauhinia blacken and Kaya senegaiensis with 0.4 and 2.2 separately.Physiological suit and responding of the preponderance species was one of the most reason for the soil physics and chemistry,and high temperature intimi-date condition.