Chenier Plain Marshes

A chenier is a sandy, oak-covered beach ridge that rises slightly above the surrounding coastal wetlands, giving the Chenier Plain its name. These distinct ridges are scattered across the Gulf Coast in Louisiana and Texas, separating the interior marshes from the Gulf of Mexico.

The Chenier Plain marshes serve as a critical first landfall stopover for millions of neotropical songbirds and shorebirds crossing the Gulf of Mexico during spring migration. The oak-covered ridges provide immediate food and shelter for exhausted birds making the grueling trans-Gulf journey.

The Chenier Plain is a vast coastal wetland ecosystem stretching from Vermilion Bay in southwestern Louisiana all the way to East Bay in eastern Texas. Unlike the Mississippi River Delta, this area was primarily shaped by longshore currents depositing sand into distinct ridges rather than river deltas.

The Chenier Plain Marshes face severe threats from coastal erosion, subsidence, and saltwater intrusion exacerbated by human canal dredging and storm surges. The loss of these vital wetlands heavily impacts local blue crab and shrimp fisheries, while also removing crucial hurricane protection for the coastlines of Louisiana and Texas.