RNR 1001 : RNR 1001 Exam II Notes
Document Summary
Colonial america - 221 million acres in the lower 48 states, 171 million in. Between 1780 and 1980, alaska lost less than 1%, but the lower 48 states lost about 50% - now about 104 million acres. 60 acres (45 football fields) per hour over 200 years - 4 times the size of oh. Annual losses estimated to be 300,000 to 450,000 acres in the mid 1900s. declined to about 60,000 acres by 1997-some loss counteracted by restoration. Lost wetlands from urbanization (most permanent), agriculture and forestry activities. The saltwater kills the plants in the marshes. Hot water takes up more space than cold water. It causes more open water to be there: most of the coastal marsh is gone in la compared to the east coast and tx. Aquatic animals like being on the edge, when the salt water comes, it degrades the edges of the wetlands.
