1. In addition, numbers vary widely between years due to the large population fluctuations . 2. The post office had disbanded by 1915 after significant population fluctuations . 3. Elton later applied these ideas of population fluctuations to animals. 4. Others argued that frogs and toads undergo natural population fluctuations . 5. The overall number changes with a state's population fluctuations . 6. However, these interventions are not always seen favorably, since natural population fluctuations are not permitted. 7. Census figures are unable to capture these dynamic population fluctuations that are associated with seasonal tourism. 8. So far, the population fluctuations may be normal. 9. Long-term studies are beneficial for separating the effects of normal population fluctuations from the effects of timbering. 10. Other recent studies have linked large-scale climate changes to population fluctuations in American songbirds and European butterflies.
