Stray showers of mercury getting into food chain Poisonous metal released as a vapour by burning fuel, then falls back to Earth and gets absorbed by the aquatic ecosystem. Study shows over time mercury is oxidised and gets deposited back on Earth, through rain or snow. Bacteria then transform the oxidised mercury into methyl mercury, which easily enters the food chain. Photograph: Graham Turner for the Guardian
ebalancing the natural predatory hierarchy, Yellowstone National Park's biodiversity has actually increased, whole landscapes have rejuvenated, and the course of the river has even been changed for the better! It's almost unbelievable.
The amazing EcoSphere is the original self contained aquatic ecosystem. Enclosed in glass, this miniature ecosystem is self sustaining with the perfect balance of animal and plant life. Not only are they pieces of art and a novelty, they're a tool used for learning and education. Inside each glass sphere are algae, shrimp, and micro-organism in natural sea water. They have an average life expectancy of 2+ years and require no feeding or cleaning. The EcoSphere has been used by NASA…
Aquatic Ecosystems : An aquatic ecosystem is an ecosystem in a river. Areas of creatures that are dependent on each other and on their atmosphere exist in aquatic ecosystems. The two main types of ecosystem are marine and fresh water ecosystems.