Tropical Forest
The major land biome in the National Park of American Samoa is the tropical rainforest. Tropical rainforests make up only 6% of the Earth’s total land surface. The tropical rainforests climate is very warm, it has an average annual temperature of greater than 20 degrees celsius. They also have very little seasonal variation in temperature or day length, which is very favorable for plant growth. The tropical rain forests temperature ranges from 20 to 25 degrees celsius and they have more than 250 centimeters of annual rainfall. The main climate control of the tropical rainforests are latitude. The tropical rainforest is found between 10 ° N and 10 ° S latitude at elevations below 3,000 feet. There are three major, disjunct formations:Neotropical (Amazonia into Central America), African (Zaire Basin with an outlier in West Africa; also eastern Madagascar), Indo- Malaysian (west coast of India, Assam, southeast Asia, New Guinea and Queensland, Australia). The National Park of American Samoa is an Indo-Malaysian tropical rainforest.
Marine Ocean
The largest of all the ecosystems, oceans are very large bodies of water that dominate the Earth’s surface. The ocean regions are separated into separate zones: intertidal, pelagic, abyssal, and benthic. All four zones have a great diversity of species. Four zones are the intertidal zone is where the ocean meets the land, pelagic zone includes those waters further from the land, basically the open ocean, benthic zone is the area below the pelagic zone, abyssal zone which is the deepest parts of the ocean. Coral reefs are widely distributed in warm shallow waters. They can be found as barriers along continents, fringing islands, and atolls.