Since these plants are located in wetlands, they need to have certain characteristics to adapt to their environment for oxygen. Red mangroves are located in the lowest elevation and, therefore, are surrounded by more water. This type of mangrove uses prop roots to lift the bulk of the tree out of the water (when the water level is normal and not unusually high) giving the tree room to bring in oxygen. Black mangroves develop pneumatophores which are roots that extend up into the air bringing in oxygen much like we use a snorkel. In white mangroves, lenticels in the lower trunk obtain oxygen for aerenchyma. Each type of mangrove has its own characteristics that help it to adapt to the environment it grows in. This includes characteristics to help provide fresh water and oxygen for plant growth.