The marine realm covers 70% of the Earth's surface. It contains ice-covered seas and hydrothermal vents, muddy estuaries, deep ocean trenches and the clear blue open sea. The oceans and seas are also integral to the whole earth-ocean-atmosphere system, which controls the climate and conditions for life on Earth. The living, physical and chemical parts of the Earth all interact and influence one another, so that it is impossible to consider one aspect without thinking of the others. This module describes the different marine environments, the organisms that inhabit them and their ecological interactions, and the physical and chemical conditions that determine the diversity of marine life. It also discusses how human activity is influencing marine ecosystems, through overfishing, pollution, and climate change.
- Module Supervisor: Michelle Taylor