Based on his lectures, he wrote the book ‘Plantesamfund’, which was immediate translated to German, Polish and Russian, later to English as ‘Oecology of Plants’.
===Warming in ustanovitev ekologije kot znanstvene discipline===Medtem ko je bil Darwin osredototočen predvsem na tekmovalnost kot dejavnik izbora vrst, je Eugen Warming uvedel novo disciplino, ki je upoštevala nebiotske dejavnike kot so suša, ogenj, sol, mraz...in jih jemala enako resno kot biotske dejavnike.