The silting of the Dee has been accelerated by the deliberate introduction of the invasive colonising grass Spartina anglica in Connah's Quay in 1928, resulting in the growth of extensive marshlands.
Spartina alterniflora | Spartina | Spartina bakeri | Spartina anglica | Spartina maritima |
There have been many attempts made to eradicate these problems for example, in New Zealand, the cordgrass Spartina anglica was introduced from England into the Manawatu River mouth in 1913 to try and reclaim the estuary land for farming.