translate English to French: No single cause has been found for these declines: a number of different factors are likely affecting shorebird populations such as wetland drainage, pollution, habitat loss and disturbance on the nesting grounds.
Aucune cause particuliÃ¨re n'a Ã©tÃ© attribuÃ©e Ã ces dÃ©clins. Un certain nombre de facteurs diffÃ©rents peuvent avoir une incidence sur les populations de limicoles , tels que le drainage des terres humides, la pollution, la perte dâ€™habitats et la perturbation des sites de nidification.