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Michael John Kingsford
Contributor
LOCATION: Sydney, Australia
Professor and Head of the School of Marine Biology and Aquaculture, James Cook University, Queensland, Australia.
Primary Contributions (1)
![ocean zonation](https://cdn.britannica.com/67/6567-050-1FC252B4/ocean-Zonation-pelagic-zone-waters-globe-continental.jpg?w=320&h=240)
Marine ecosystem, complex of living organisms in the ocean environment. Marine waters cover two-thirds of the surface of the Earth. In some places the ocean is deeper than Mount Everest is high; for example, the Mariana Trench and the Tonga Trench in the western part of the Pacific Ocean reach…
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