BIOL10001 Lecture Notes - Lecture 29: East Australian Current, Antarctic Circumpolar Current, Desiccation
18 Oct 2018
School
Department
Course
Professor
Document Summary
East australian current warm current warm current warms southern waters favours survival of tropical species. Abyssal zone to 4000m below to 10000m below to 200m below photosynthesis occurs best here relatively shallow. Isolation for more than 65 million years no major extinction events currents act as barriers and transporters. Intertidal rocky shores and sub tidal rocky reefs. Sub-tidal wet when tide is high no water, organisms stay dry. Desiccation, temperature and salinity increase up the shore and vertically mostly wet, even in low tide. Longer period of low tide exposure increases thermal stress and desiccation. Wave shock, biological interactions, competition and predation increase down the water (shore has least) Australia has the largest area of temperate seagrass. Blue whales them come to feed on them. Global marine hotspots: areas of rapid temperature change. Cold flinders current ows up w coast of tasmania towards sa.
