ENV118 Lecture Notes - Lecture 14: Offshore Aquaculture, Firefighting Foam, Biodiversity Hotspot
16 Nov 2018
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Document Summary
By 2050 the global population will reach 9. 7 billion and 2 out of 3 people will live in a city. 75% of the australian population lives in cities and 80-90% live along the coast. 44% of the world lives within 150km of the coast. Urban estuaries can be mega diverse : vibration creates an exclusion zone of marine animals. Most structures are flat, featureless artificial structures that do not foster complex life. They also create areas of permanent shade, which is not typical in a marine environment (changes the light environment) More unique taxa in natural habitats than urban structures. The sydney harbour has more fish species pontoons than the entire uk coastline. Hong kong is a biodiversity hotspot with more than 5711 species. Urban light can alter predation pressure on fouling invertebrates. Structures like breakwaters can alter water infrastructure for commercial and recreational shipping, swim nets) flow and sediment deposition.
