We don't have wolves in Britain anymore, so the deer have no natural predator higher up the food chain that eats them. Deer eat woodland shrubs and undergrowth. So if there are too many of them ...

But in a statement posted to its website last month, Arctic Ice Project said “recent ecotoxicological tests have revealed potential risks to the Arctic food chain”, prompting it to end all ...

There are more resources available from BBC Teach, such as this short clip that explains more about food chains and is from the series Natural world of plants and wildlife. BBC Teach has thousands ...

For example: 1) is it a species that’s a vital part of a food chain? Or 2) a species that helps demonstrate broader conservation needs? Or 3) is it an important cultural icon that will garner support ...