Elbow Cay , Bahamas – Presentation on Coastal Ecosystems by Neil Sealey. Friends of the Environment hosted Neil Sealey at the Abaco Inn on Tuesday, January 29th, night. A great group of people gathered to hear about the latest statistics and learn about the erosion of dunes during the educational and informative talk. A few interesting points…. Dunes migrate and the Bahamas will never have shortages. Did you know that Casuarina trees are invasive and should never be planted in dunes? Or …Did you know that road architects frequently make the mistake of building roads too close to the shoreline? And they end up redoing the job.