This is the 1284th most frequent Russian word.
природных
"Природных" means "natural" or "of nature."
In this sentence, 'природных' is used as an adjective in the genitive plural case modifying the noun 'ресурсов' to mean 'natural' in the context of resources.
Россия богата природных ресурсов.
Russia is rich in natural resources.
'Природных' here acts as an adjective in the genitive plural case describing 'экосистем', emphasizing the natural aspect of ecosystems.
В музее была выставка о сохранении природных экосистем.
There was an exhibition in the museum about the conservation of natural ecosystems.
In this context, 'природных' qualifies 'условиях', which means 'conditions', again in the plural genitive case, to describe their natural origin.