A central goal of conservation is to protect and preserve the ecosystem functions and processes upon which all life depends. Because food-chain length affects these ecosystem functions and processes, we need to understand how food-chain length varies and what causes this variation.  -   David Post     Quotes
A central goal of conservation is to protect and preserve the ecosystem functions and processes upon which all life depends. Because food-chain length affects these ecosystem functions and processes, we need to understand how food-chain length varies and what causes this variation. David Post
 Life