NON-NATIVE AND NATIVE INVASIVE TERRESTRIAL PLANT SPECIES IN COMANA NATURAL PARK. CASE-STUDIES: AMORPHA FRUTICOSA AND CRATAEGUS MONOGYNA Journal title: Revue Roumaine de Géographie/Romanian Journal of Geography Authors: Monica Dumitraşcu, Ines Grigorescu, Gheorghe Kucsicsa, Carmen-Sofia Dragotă, Mihaela Năstase Subject(s):