ES 470 Lecture 2: ES-441-Class-Notes - Copy

• School: University of Victoria
• Department: Environmental Studies
• Course: ES 470
• Professor: Eric Henderson

Document Summary

Ecological reference: a representation from nature that guides all aspects of planning and implementation. It reveals ecosystem states and indicates what is known. An ecological description of the ecosystem pre-disturbance. Remnants of the same ecosystem that survived th eimparement. 1. same place, same time (can serve as its own reference site) 3. same place, different time (records, traditional knowledge, earlier studies, etc) 4. different place, different time (no information on prior ecosystem conditions, long history of human use, pre-human settlement id difficult to get an idea of look for a similar landscape with similar conditions to use as reference) Developed by daniel pauly 1995 - an incremental lowering of standards a gradual change in our accepted norm for ecological conditions. older generations vs younger. Radically depleted fisheries important to look beyond one generation. Large declines in species occur mass because you don"t see the reference point. Global declines in marine fisheries solifidied this theory.