Complex sentence: Additionally, the National Trust for the Turks and Caicos Islands has stewardship for the Little Water Cay to ensure that it is not mismanaged and has initiated a program to remove feral cats from Pine Cay and Water Cay.
Split into simpler sentences: Additionally, the National Trust for the Turks and Caicos Islands has stewardship for the Little Water Cay to ensure that it is not mismanaged. Furthermore, they have initiated a program to remove feral cats from Pine Cay and Water Cay.