There is an accelerated process of biological globalization. The increase in trade, transport and travel has created many new opportunities, both deliberate and accidental, for organisms to move around the world and invade new environments. Some of these introductions bring net benefits but many are of aggressive invasive species that upset the local ecological balance and crowd out other more desirable, useful or perhaps unique species. These changes can degrade ecosystems and lead to significant losses in biological diversity, ecosystem resilience and productivity.