The primary impact of agricultural expansions on biodiversity is habitat loss, as natural ecosystems are converted into agricultural lands. This transformation leads to the fragmentation of habitats and reduction in the availability of natural refuges for species. Additionally, agricultural practices can introduce chemicals that harm native wildlife and lead to the dominance of non-native species, further reducing biodiversity. Sustainable agricultural methods, such as agroecology, can mitigate these effects by promoting habitats that support diverse species while maintaining agricultural productivity.