sentences:  He developed 9–point scales for rating European plant preferences for light, temperature, continentality (geographic region), nutrients, soil moisture, pH, and salinity.Ellenberg's father (a school teacher) died during World War I in 1914.From 1920 to 1932 Ellenberg studied in Hanover, where his interest in local flora and fauna was established, and where he came in contact with Reinhold Tüxen.