Black poplar  (Populus nigra)

The preferred habitat of this species has become very rare across Europe as floodplains have been modified and drained for agricultural purposes or succumbed to development pressures (5). Other threats include hybridisation with introduced poplars, which degrades the gene pool, competition with hybrids, and reductions in the groundwater table, which results in trees drying out and dying (4).

Plans to try to recreate the flood plain forest habitat favoured by black poplar, a habitat that is largely extinct in the UK, have been put forward (8).