books.google.com - Salt marshes are vitally important coastal ecosystems that filter water, buffer against storm erosion, and provide essential nursery habitat for important fishery species. Long thought to be resistant to ecological perturbations, salt marshes are now known to be highly sensitive indicators of environmental...http://books.google.com/books/about/Human_impacts_on_salt_marshes.html?id=dZbvgaYT6JYC&utm_source=gb-gplus-shareHuman impacts on salt marshes
