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Zoological Research
Kunming Institute of Zoology, Chinese Academy of Sciences
ISSN: 2095-8137
Vol. 27, No. 1, 2006, pp. 29-33
Bioline Code: zr06005
Full paper language: Chinese
Document type: Research Article
Document available free of charge

Zoological Research, Vol. 27, No. 1, 2006, pp. 29-33

 en Population Dynamics of Dremomys pernyi check for this species in other resources and Callosciurus erythraeus check for this species in other resources in the Protective and Non-protective Pine Forests at Different Ages
MEN Xing-yuan, GUO Xian-guo, DONG Wen-ge, QIAN Ti-jun

Abstract

Four pine forests (6-10, 11-15, 16-20 and 31-40 year-old) located in the Cangshan Mountain and Erhai Lake National Reserve and seven pine forests (1-5, 6-10, 11-15, 16-20, 21-30, 31-40 and more than 50 year-old) located in the non-protective area near the national reserve were selected. Three replications of each forest was set and a total of 33 sites were investigated. At each site, we quantified six habitat variables (species richness, abundance and percentage of grasses and shrubs coverage respectively at the bottom layer of forests) within randomly determined 5m x 5m areas. One hundred cages were set in five lines at each site to trap small mammals, whose species and numbers were recorded. Dominance of Dremomys pernyi check for this species in other resources and Callosciurus erythraeus check for this species in other resources in small mammal communities, time niche breadth and time niche overlap between the two small mammals were calculated respectively. Step-wise regression was used to analyze relationship between small mammals and habitat factors. Our results indicated that D. pernyi occurred earlier than C. erythraeus in protective pine forests. D. pernyi was captured in 6-10 year-old forest initially, and C. erythraeus was captured in 16-20 year-old forest initially. D. pernyi and C. erythraeus were captured in the 31-40 and 21-30 year-old forests initially in the non-protective area, respectively. Populations of D. pernyi and C. erythraeus in the 31-40 year-old protective forests were 3 and 3.75 times of those in the same-aged non-protective forests, respectively. Shrubs significantly influenced populations of the two small mammals. Populations of Dremomys pernyi was positively correlated with density of shrubs; populations of C. erythraeus was positively correlated with coverage of shrubs, and negatively correlated with coverage of grasses. D. pernyi and C. erythraeus were important for pine forests to scatter pine seeds. Human activities in the non-protective pine forests decreased the vegetation heterogeneity at the bottom layer of pine forests, postponed the occurrence of D. pernyi and C. erythraeus, and decreased populations of the two small mammals.

Keywords
Dremomys pernyi; Callosciurus erythraeus; Population dynamics

 
© Copyright 2006 Kunming Institute of Zoology, the Chinese Academy of Sciences
Alternative site location: http://www.zoores.ac.cn/

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