The existence and global asymptotic stability of positive periodic solutions of the ecological system are basic and important questions in the theory of mathematical ecology.
The discovery also filled a niche in the ecological system that scientists "thought was empty".
We are invading ourselves and attacking the ecological system of which we are a part.
She says fires are a natural part of the ecological system.
-What scientific evidence is available to explain how coral reefs are an important part of the ecological system?
"We are now seeing that this method [of meat as a source of protein] is no longer sustainable towards the ecological system.
The immediate environmental effects of oil spills have been readily identified, but their long-term impact on the ecological system of an affected area is more difficult to assess.
Above this depth is the euphotic zone, but below it in the aphotic zone phytoplankton the lowest level in the ecological system of a lake cannot survive unless the organisms are capable of vertical migration.
"The ecological system is in a state of near-total collapse," claims John Marshall, a green activist.Enter the Comprehensive Everglades Restoration Plan (CERP), which was signed in December 2000, at the last gasp of the Clinton administration.
But it really is in the first instance a challenge to our consciousness and our moral courage and our ability to realize the radical transformation in our relationship to the ecological system of the Earth and the need for a truly massive change in the way we use resources, and manage waste, and seize exciting new opportunities that will enable us to solve this.
Multilateral basin management is a prerequisite for restoring the ecological system.
