Original sentence: Lobaria is a genus of lichens commonly known as "lungwort" or "lung moss" because their physical shape somewhat resembles a lung.Their sensitivity to toxins makes them an excellent marker of ecosystem health, and they are often found in ecological climax communities such as the old growth forests of northwestern North America
Edited sentence: Lobaria is a genus of lichens commonly known as "lungwort" or "lung moss" as their physical shape somewhat resembles a lung.Their sensitivity to toxins makes them an excellent indicator of ecosystem health, and they are often found in ecological climax communities such as the old growth forests of northwestern North America