relation to plant and animal fertility cycles and land and animal preservation. The south west region of Western Australia was one of the first places on earth to experience the effects of human induced climate change, namely a significant decline in annual rainfall. The drying climate is expected to continue and exacerbate bushfires. The summer of 2021/22 has been the hottest on record, with many consecutive days over 40 degrees Celsius. Ecology The Swan Coastal Plain is a specific botanical province. Flora Southwestern Australia is very rich in flora, with an estimated 8,000 species, a quarter of which can be found on this coastal strip. The traditional flora of the dunes and the fairly infertile plain was dense shrubby kwongan heathland adapted to the poor soils, dry summers, and regular fires. Kwongan vegetation contains a large number of endemic plant species, especially shrubs and wildflowers, including yellow flame and toothbrush grevilleas, fan-flowers, and cockies' tongues. The heath is scattered with woodland of Banksia and other trees including the red-blossomed quandong (desert peach) and firewood banksia. Going further inland, especially in river valleys where the soil is better, eucalyptus woodlands including tuart (Eucalyptus gomphocephala) occur. The wetlands meanwhile have been particularly important ecologically, supporting a rich habitat of many plant varieties. The Swan Coastal Plain is a particularly important centre for certain types of plants, including Banksia, but also Caladenia orchids and Leucopogon shrubs, indeed some genera, such as the Dryandra series of Banksia and the Synaphea flowers are found nowhere else in the world. Other flora of the plain includes a type of mistletoe called the Christmas tree. Fauna The coastal plains are home to a number of marsupials from the large western grey kangaroo to the very small southwestern pygmy possum and mouse-like honey possum. Remnant populations of some marsupials are found on offshore islands including the Tammar wallaby and the quokka, the latter particularly on Rottnest Island. The coastal plains skink, discovered in 2012, is endemic to sand dunes in the area, and is threatened by residential development. Threats and preservation Much of the plain has been cleared for agriculture and urban development, especially in and around Perth, where the heath has been almost entirely cleared as far as the Darling Scarp and the city is spreading up and down the coast. Although some areas are protected, clearance is going on while the plant disease Phytophthora dieback and