1 was. Several times the submersible pilot insisted on coming off the 



2 . floor of the canyon so that we wouldn't be stuck under underhangs. 



3 These were Eocene chalk cliffs, and this was just a spectacular, 



4 very, very narrow canyon. It does not incise into the slope very far. 



5 Corsair Canyon was rather nondescript and did not have that much hard 



6 substrate available. 



7 What I want to show you from this data set basically is if you 



8 know one canyon, you don't know the fauna in all of them. Each of them 



9 is different. When you're talking about patchiness, you're talking 



10 about patchiness within a canyon and you can also talk about patchiness 



11 between canyons. 



12 Knowing the fauna along a canyon wall does not tell you that the 



13 canyon one canyon over is going to be the same. A lot of these 



14 differences do not have that much that to do with hard substrate 



15 availability. 



16 So, there are other physical factors going on that are controlling 



17 the distribution of some of these animals. This is one of the animals 



18 that made a difference. I'll show you the patterns in a minute, I just 



19 want to introduce the animals to you. 



20 This is Acamlla arbuscula [phonetic], soft substrate coral 



21 gorgonian. This is another one, Anthomastus grandif Ion's [phonetic], 



22 again soft substrate. Another one, this is Penatula grandis, again soft 



23 substrate. 



24 This is a hard substrate one, Desmophilum cristigalae [phonetic], 



25 which is usually found on the underhangs of large outcrops. It's also 



26 found on some boulders, but it seems to prefer downward orientation 



27 because of sediment loading. 



28 DR. COOPER: Barbara, is this Heezen Canyon here? 



29 DR. HECKER: This particular picture is Heezen Canyon, yes. 



30 Here's another one of those clustergrams. Basically, what I just 



31 want to show you here is the areas that are shaded with a color are 



32 shaded because they're composed of areas that are only from one canyon 



33 or let's say primarily. 



114 



