life professor comparative anatomy ref name stauffer ref name friederichs opinions differ founder modern ecological theory mark haeckel 's definition beginning ref name hinchman others say eugenius warming writing oecology plants introduction study plant communities ref name goodland carl linnaeus' principles economy nature matured early th century ref name egerton ref name kormandy linnaeus founded early branch ecology called economy nature ref name egerton works influenced charles darwin adopted linnaeus' phrase ''economy polity nature''
Natural science Biology Ecology