Hi, all- A colleague recently asked me if I had a good reference that addressed the appropriateness of various abundance measures, i.e., frequency, cover, etc., in calculating indices. She has specifically been calculating species diversity, but I had to ask the question what else was she getting at, and what were the specific questions she was trying to ask from the data. Species richness just wants presence/absence but whether to use relative frequency, frequency, relative cover, cover, etc., I don't know when one is more appropriate than another. Is there a good reference, or do some of you have a good set of rule-of-thumb guidelines that would be helpful? (while I think there may be others on the list helped by this, feel free to respond off list) Thanks- david
David Baker, Ecologist Central Oregon Interagency Ecology Program Deschutes National Forest 1001 SW Em Kay Dr. Bend, OR 97702 (541) 383-5424
