<Tr> <Td> East Siberian taiga </Td> <Td> Russia </Td> </Tr> <Tr> <Td> Iceland boreal birch forests and alpine tundra </Td> <Td> Iceland </Td> </Tr> <Tr> <Td> Kamchatka - Kurile meadows and sparse forests </Td> <Td> Russia </Td> </Tr> <Tr> <Td> Kamchatka - Kurile taiga </Td> <Td> Russia </Td> </Tr>

What do tundra and taiga have in common