Biodiversity in agriculture is crucial for sustainable development. Different types of ecosystems play a role in this, from natural to managed by humans. Crop biodiversity is essential for food variety and genetic material for new crop varieties. Agricultural fields have less diversity than natural ecosystems, especially in areas with high agricultural land. Enhancing biodiversity in regional landscapes is important to combat biodiversity loss. In tropical environments with high biodiversity, interactions between transgenic crops and wild relatives may be buffered by surrounding ecosystems. Competition from introduced species is not a common cause of extinctions in long-term resident species.