A scientist who studies the interactions between organisms and their environment.

पर्यावरण विज्ञानी

English Usage: The ecologist conducted a thorough research on the impact of climate change on marine life.

Hindi Usage: पर्यावरण विज्ञानी ने समुद्री जीवन पर जलवायु परिवर्तन के प्रभाव पर गहन शोध किया।