| Title: | Effects of acorn abundance on density dependence in a Japanese wood mouse (Apodemus speciosus) population |
| Other Titles: | Density dependence in wood mouse |
| Authors: | Saitoh, Takashi Browse this author →KAKEN DB |
| Vik, Jon Olav Browse this author |
| Stenseth, Nils Chr. Browse this author |
| Takanishi, Toshikazu Browse this author |
| Hayakashi, Shintaro Browse this author |
| Ishida, Nobuo Browse this author |
| Ohmori, Masaaki Browse this author |
| Morita, Toshio Browse this author |
| Uemura, Shigeru Browse this author →KAKEN DB |
| Kadomatsu, Masahiko Browse this author |
| Osawa, Jun Browse this author |
| Maekawa, Koji Browse this author |
| Keywords: | Dynamics |
| Intraspecific competition |
| Lateral perturbation effect |
| Masting |
| Nonlinear density dependence |
| Nonlinear perturbation effect |
| Issue Date: | Apr-2008 |
| Publisher: | Springer Japan |
| Journal Title: | Population Ecology |
| Volume: | 50 |
| Issue: | 2 |
| Start Page: | 159 |
| End Page: | 167 |
| Publisher DOI: | 10.1007/s10144-008-0076-6 |
| Abstract: | We analysed the effects of Quercus crispula acorn abundance on the density dependence of the large Japanese wood mouse Apodemus speciosus using time series data (1992-2007). The data were obtained in a forest in northern Hokkaido, Japan, by live-trapping rodents and directly counting acorns on the ground. Acorn abundance in one year clearly influenced the abundance of wood mice in the following year in all models examined based on the Gompertz and Ricker model; in addition, the abundance of wood mice had effects on the population. Acorn abundance influenced the strength of density dependence (intraspecific competition) of the wood mouse population. When the abundance of acorns was high, density dependence was relaxed, and as a result the equilibrium density at which the population growth rate decreased to zero became higher. Those effects of acorn abundance were regarded as a nonlinear perturbation effect (sensu Royama 1992). The nonlinearity of density dependence was also detected; higher densities had stronger effects on population growth rates. |
| Rights: | The original publication is available at www.springerlink.com |
| Relation: | http://www.springerlink.com |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/33873 |
| Appears in Collections: | 北方生物圏フィールド科学センター (Field Science Center for Northern Biosphere) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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