Invading into an ecologically non-uniform area
| Autor: | R. Hengeveld, F. van den Bosch |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Birth Place
education.field_of_study WIMEK Population Instituut voor Bos- en Natuuronderzoek Mean age Wiskundige en Statistische Methoden - Biometris Standard deviation Combinatorics Institute for Forestry and Nature Research Child bearing Life Science education Mathematical and Statistical Methods - Biometris Mathematics |
| Zdroj: | Past and future rapid environmental changes; the spatial and evolutionary responses of terrestrial biota Past and future rapid environmental change: the spatial and evolutionary responses of terrestrial biota. Springer Verlag, Berlin Past and Future Rapid Environmental Changes ISBN: 9783540618775 |
| Popis: | In two earlier papers (Van den Bosch et al. 1990, 1992; see also Hengeveld 1994 and Hengeveld & Van den Bosch 1991 for a worked-out calculation) we arrived at the equation describing a species’ rate of spatial population expansion, C, under uniform conditions $$C = \frac{\sigma }{\mu }\sqrt {2{\text{ln}}\left( {{R_0}} \right)} $$ (1) in which µ represents the mean age of child bearing, σ the standard deviation of the marginal density of the sites where the individuals settle relative to their birth place, and Ro, the net reproduction rate of the females in the expanding population. |
| Databáze: | OpenAIRE |
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