The spatial distribution patterns of banana pseudostem weevil eggs is aggregating and the basic component of distribution is colony. There is no correlation between the aggregating intensity and the population density.
Index of dispersion(ID),index of cluster size(ICS),Green index(GI),index of cluster frequency(ICF),index of mean crowding(IMC),index of patchiness(IP) and Moristia's index(IM) were used to analyze the spatial distribution patterns of 4 different communities of Symplocos setchuanensis(seedlings,sapling trees,small trees and big trees) in the Jinyun Mountains.
Species richness, diversity, niche, spatial distribution patterns and biomass were used to analyze characteristics of the communities, the results showed that: after several decades of closing the land for reforestation, Schima superba have been the dominant population of the communities, and configurations and circumstances of these plantations have became better.
3. The space distribution pattern of the litterfall layer was L>H+F, and the storage in H+F layer was more than 50% of the total amount. In the pine stand the total amount of litter-fall layer was 7884 Kg. hm~(-2), and 5776 Kg.
Through the investigation to the 4,800 m2 area sample plots by using the surveying methods such as coefficient of diffusion and concentration class index,the research was conducted to the space distribution pattern of nine main phytobiocoenos of Castanopsis eyrei(Champ.) Tutch forest.
Spatial distribution pattern, scale and gap characteristics of Pinus armandii population in Qinling Mountains, China
Based on the data collected from 27 plots of the Pinus armandii community in Qinling Mountains, we studied the spatial distribution pattern, scale, and gap characteristics of the P.
This mainly depended on biological features of Larix principis-rupprechtii and forest environments, but it also meant that the scale was an important factor in controlling spatial distribution pattern of tree individuals.
Spatial distribution pattern of populations ofIsoetes sinensis palmer, an endangered Quillwort in China
Spatial distribution pattern of COD shows that it decreased downstream.