This compared to a nationwide seasonally adjusted rate of 5.4%. The EU seasonally adjusted unemployment rate was 6.7% in September 2018. Population density may vary annually or seasonally. Use of seasonally adjusted time series data can be misleading. Rainforests shrank into isolated islands, surrounded by seasonally dry habitats. Eastern lowland gorillas have more diverse diets, which vary seasonally. This count fluctuates throughout the day, seasonally, and during menstruation. Local abundance varies horizontally, vertically and seasonally. In the British Isles, dietary composition varies seasonally and regionally. It prefers habitats with calm water containing floating vegetation, usually flooding and drying seasonally. American marten diet may shift seasonally or annually. Wetter areas, seasonally watered, are widely pasture farmed. The rate of aragonite deposition varies diurnally and seasonally. Seasons came back into effect and the poles grew seasonally colder. It occurs in freshwater rivers and streams, which generally flood seasonally.