The Ecology of Aphis craccivora Koch and Subterranean Clover Stunt Virus in South-East Australia. II. A Model of Cowpea Aphid Populations in Temperate Pastures

This paper dealt with the dynamics of community structure in a ten-year succession of needle and broad-leaved mixed forest in Heishiding of Guangdong Province. The vertical community structure tended to be complex, while the horizontal one increased by a wide range. There was no big change in species composition, but the dominance of conifers Pinus massoniana and Cunninghamia lanceolata was substituted by the broad-leaved species, such as Schima superba, Symplocos adenophylla and Schefflera octophylla. The whole community changed from needle and boad-leaved mixed forest into broad-leaved and needle mixed forest. The species diversity and evenness of tree layer were increased, the ecological dominance was decreased, and the community became more complicated.