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Macrosystem: A larger system that influences clients

Island Flora and Fauna 

The evolution of flora and fauna across the islands of Australia and Oceania is unique. Many plants and animals reached the islands from southern Asia during the last glacial period, when sea levels were low enough to allow for travel. After sea levels rose, species adapted to the environment of each island or community of islands, producing multiple species that evolved from a common ancestor. Due to its isolation from the rest of the world, Australia and Oceania has an incredibly high number of endemic species, or species that are found nowhere else on Earth.

Plants traveled between islands by riding wind or ocean currents. Birds carried the seeds of fruits and plants and spread them between islands with their droppings. Ferns, mosses, and some flowering plants rely on spores or seeds that can remain airborne for long distances. Coconut palms and mangroves, common throughout Australia and Oceania, produce seeds that can float on salty water for weeks at a time. Important flowering plants native to Australia and Oceania include the jacaranda, hibiscus, pohutukawa, and kowhai. Other indigenous trees include the breadfruit, eucalyptus, and banyan. 

Birds are very common in Australia and Oceania because they are one of the few animals mobile enough to move from island to island. There are more than 110 endemic bird species in Australia and Oceania, including many seabirds. Many flightless birds, such as emus, kiwis, cassowaries, wekas, and takahes, are native to Australia, Papua New Guinea, and New Zealand. The Pacific Islands have more than 25 species of birds of paradise, which exhibit colorful plumage.