To ensure sustainable fisheries we must consider broader ecosystems; it is these ecosystems that sustain our seafood harvests. Removing large numbers of one species may affect the other animals that rely on that species for food. This means fisheries are no longer managed in the traditional way, which focused on single species, and instead includes the consideration of broader flow-on effects. Recent studies have looked at ecosystem aspects such as predator-prey relationships, ecosystem indicators, and the possible effects of climate change within the ecosystems.