Outline how an ecological survey can be used to assess the biodiversity of a terrestrial habitat.
Table 3.1 shows some mammal species that went extinct in Great Britain or were brought into Great Britain during the last $12400$ years. The cause of each extinction or introduction and the date of each event are given. Using Table 3.1, state and explain the factors that have had a harmful effect on biodiversity in Great Britain.
Non-governmental and government organisations are cooperating to reintroduce a lynx population to its former habitat in a remote part of Great Britain. Lynx are predatory big cats. Fig. 3.1 shows a lynx. Suggest the factors that need to be considered by organisations to successfully reintroduce and restore a breeding population of lynx in Great Britain.