Dros ganrifoedd, mae rhwystrau ffisegol fel ffyrdd, gwaith datblygu a thir fferm wedi gadael bywyd gwyllt a phlanhigion yn sownd ar ‘ynysoedd’ di-gysylltiedig, gan rwystro llwybrau mudo ac felly lleihau’r gronfa enynnau ac iechyd eu poblogaethau.
Over centuries, physical barriers such as roads, development and farmland have left animals and plants stranded on unconnected ‘islands’, blocking migration routes and thus decreasing the gene pool and health of animal and plant populations.