1 Finally, Mike's data on the lead-210 inventory suggests that 



2 because of this resuspension, there is a different geochemical 



3 environment in canyons versus the open slope. 



4 Those are the things that I heard yesterday and I don't know if we 



5 should have discussion now. I have a number of--what I then did is I 



6 went through and I asked a number of questions which I think are 



7 important for addressing the hypothesis which Don and Jim want to 



8 address. 



9 I don't know how you want to organize the discussion. Are there 



10 other features we should add to this or is that a fairly complete list? 



11 That needs to be embellished or fleshed out, but that is, at least, a 



12 beginning list. 



13 DR. BOTHNER: You might want to add the words "sediment 



14 accumulation," as well, "enhanced sediment accumulation." Of course, 



15 that applies to one canyon that we know of; I mean, that's the caveat in 



16 all of this. 



17 DR. BUTMAN: Actually, in some cases, it is enhanced; in some 



18 cases, it's not. 



19 DR. TEAL: That's true, perhaps, but not true of Oceanographers; 



20 that's what I gathered from the talks yesterday. 



21 DR. COOPER: Brad, we are talking here about features that make 



22 these canyonheads as a physiographic environment unique; right? How 



23 would you compare the sedimentation here versus the mud hole south of 



24 the Cape? 



25 DR. HECKER: Brad, also, it is not just species density; it is 



26 also diversity and there is a difference. The predominant trophic 



27 structure in the canyon itself is different. I mean, you are going from 



28 mobile carnivores to filter feeders to sessile filter feeders. 



29 DR. BUTMAN: Community structure? 



30 DR. HECKER: I would say feeding strategy and community structure 



31 is a lot more complex. 



32 DR. MACIOLEK: Well, note that that's for the upper fauna. 



33 DR. AURAND: The court reporter has a strained look on her face. 



34 If you could identify yourselves when you make your comments, okay? 



177 



