[12:27:53] DIVE17 test message from the Okeanos Explorer [12:36:17] EX2104_DIVE16 ROV powered off [13:24:46] EX2104_DIVE16 ROV Launch [13:30:24] EX2104_DIVE16 ROV on Surface [13:32:07] EX2104_DIVE16 ROV Descending [13:33:24] LAT : 38.292022 , LON : -62.534249 , DEPTH : 21.6967 m, TEMP : 26.39404 C, SAL : 36.44657 PSU, DO : 6.61725 mg/l [13:38:24] LAT : 38.292918 , LON : -62.533057 , DEPTH : 82.2311 m, TEMP : 21.35244 C, SAL : 36.70904 PSU, DO : 6.87178 mg/l [13:43:25] LAT : 38.293212 , LON : -62.532081 , DEPTH : 228.1808 m, TEMP : 19.16161 C, SAL : 36.67872 PSU, DO : 6.72387 mg/l [13:48:25] LAT : 38.293285 , LON : -62.531715 , DEPTH : 371.4379 m, TEMP : 18.68649 C, SAL : 36.63286 PSU, DO : 6.64471 mg/l [13:53:25] LAT : 38.293548 , LON : -62.531629 , DEPTH : 513.7045 m, TEMP : 16.99471 C, SAL : 36.3138 PSU, DO : 5.4753 mg/l [13:58:26] LAT : 38.293872 , LON : -62.531685 , DEPTH : 656.9435 m, TEMP : 14.65036 C, SAL : 35.93909 PSU, DO : 5.07226 mg/l [14:03:27] LAT : 38.294155 , LON : -62.531654 , DEPTH : 801.7005 m, TEMP : 11.1429 C, SAL : 35.42533 PSU, DO : 4.51088 mg/l [14:08:27] LAT : 38.29427 , LON : -62.531608 , DEPTH : 950.9825 m, TEMP : 7.90526 C, SAL : 35.15578 PSU, DO : 5.30251 mg/l [14:13:28] LAT : 38.294362 , LON : -62.531786 , DEPTH : 1105.13 m, TEMP : 5.98523 C, SAL : 35.07968 PSU, DO : 6.71369 mg/l [14:18:29] LAT : 38.294432 , LON : -62.531908 , DEPTH : 1254.6428 m, TEMP : 5.12562 C, SAL : 35.03778 PSU, DO : 7.4085 mg/l [14:23:02] Hello [14:23:29] LAT : 38.294564 , LON : -62.532132 , DEPTH : 1402.5126 m, TEMP : 4.45402 C, SAL : 34.99487 PSU, DO : 7.97544 mg/l [14:23:47] good morning! [14:24:50] close to the bottom? [14:25:15] about 400 m [14:25:19] to go [14:25:46] Thank you! [14:27:31] Good morning all [14:28:01] Hi Rhian! [14:28:20] Great to see you here Asako, it's been too many years! [14:28:29] LAT : 38.294609 , LON : -62.532455 , DEPTH : 1550.3002 m, TEMP : 4.37495 C, SAL : 34.99008 PSU, DO : 8.00479 mg/l [14:30:04] indeed. when we met last time Rhian? [14:30:22] were you in Boston? [14:30:45] yes, I was there! now I remember. [14:30:54] If not it would be Amsterdam! [14:31:42] Now you are really reaching back there! [14:31:54] Hi Scott! [14:32:05] Good morning or evening Asako. [14:32:41] ~~ 100 m to bottom [14:33:30] LAT : 38.294553 , LON : -62.532606 , DEPTH : 1682.1883 m, TEMP : 4.14522 C, SAL : 34.9736 PSU, DO : 8.12033 mg/l [14:34:01] @Scott 27 min to 0. evening? or morning? :) [14:36:51] :-) [14:38:30] LAT : 38.294069 , LON : -62.53301 , DEPTH : 1686.6349 m, TEMP : 4.13018 C, SAL : 34.97203 PSU, DO : 8.12978 mg/l [14:43:31] LAT : 38.294 , LON : -62.53307 , DEPTH : 1747.7309 m, TEMP : 4.06543 C, SAL : 34.97006 PSU, DO : 8.13994 mg/l [14:43:45] 30m off bottom [14:44:40] bottom in sight [14:44:44] bottom in sight [14:45:10] Looks like lots of bio on bottom. Sorry Jason... [14:45:53] lot's of current scour here [14:46:22] bathypathes [14:46:26] EX2104_DIVE17 ROV on Bottom [14:48:31] LAT : 38.293958 , LON : -62.533183 , DEPTH : 1784.0354 m, TEMP : 4.04295 C, SAL : 34.97014 PSU, DO : 8.13598 mg/l [14:48:57] Where does the final track plan have us? Are we on top of the platform or on the lip? [14:49:06] on top [14:49:15] Thanks [14:49:18] On top, below a 70 m ridge that cuts across it [14:49:48] Looking at my notes from Gosnold 2014 dive I see we are picking up where we left off, including Paragorgia with yellow Bullagummizoanthus [14:50:30] and how am i supposed to say that scott!! [14:50:35] exactly the one [14:50:36] perfect looking coral boquet to start [14:50:37] nematode? next to the snake star [14:51:37] and stoloniferous polyps [14:53:31] LAT : 38.293903 , LON : -62.533158 , DEPTH : 1784.7036 m, TEMP : 4.06034 C, SAL : 34.97102 PSU, DO : 8.09534 mg/l [14:54:14] @Vonda: you have good eyes! I missed it. [14:54:46] @Rhina: hah! Just read your comment, which I hadn't seen when I gave the name on air. [14:55:04] Now there is a bonus! [14:55:21] Very nice rock! ;-) [14:55:34] I love this rock!!:) [14:56:09] vondawarehamhayes leaves the room [14:58:20] On the 2014 dive we saw at least 15 species of coral. That dive transect was 300 m deeper than today. [14:58:31] LAT : 38.293881 , LON : -62.533381 , DEPTH : 1783.5027 m, TEMP : 4.04721 C, SAL : 34.96872 PSU, DO : 8.05747 mg/l [14:59:28] Don't often see Paragorgia out here without the yellow zoanthid... [15:00:17] But there is one here. [15:00:32] I was thinking the same Scott! [15:00:49] Must be social distancing! [15:01:00] Parantipathes black coral to left [15:01:43] and a nice Hymenaster on the rock to left [15:02:06] Not sure what the orange is on the colony in center [15:02:27] I mean tips of branches toward center [15:02:55] Yup. Just the start of the "infection" [15:03:32] LAT : 38.29389 , LON : -62.533385 , DEPTH : 1784.9384 m, TEMP : 4.04422 C, SAL : 34.96943 PSU, DO : 8.11235 mg/l [15:05:31] Sorry to jump in on the geology with all that bio... [15:06:54] @Jason: is it still considered a nodule if it is filled with sediment, or does it have to be solid FeMn? That is, will you do a squeeze test? [15:07:45] BTW, I realize it isn't pure FeMn in any case. Just my shorthand for accretion of minerals. [15:08:05] nice! Chuck Messing will appreciate that intact stalked crinoid!! [15:08:19] Nodules always have a nucleus of some sort, can be sediment, other pieces of rock. It is a combination of the geochemistry and precipitation pattern (concentric layers) that gives it the :nodule" designation [15:08:28] We should have a better one Chris in the biobox from earlier! [15:08:30] @nd one of the morning, already (stalked crinoid on rock) [15:08:33] LAT : 38.293958 , LON : -62.533355 , DEPTH : 1785.4576 m, TEMP : 4.04832 C, SAL : 34.96942 PSU, DO : 8.13907 mg/l [15:09:18] @Jason: right. I meant, if this is a thin crust around mostlt sediment, is it still considered a nodule? Or does it have to be mostly FeMn? [15:09:27] *mostly [15:11:00] @Rhianwaller yes.. this one was much smaller. very nice! thanks! [15:11:04] I think that is likely a point of intense debate in the nodule community. THese appear to be quite strong, especially when compared to the crusts previously collected [15:11:25] @Jason: sure looked heavy dropping into the rock box [15:11:57] strong current down here [15:12:19] coming right at us [15:12:51] Part of te basis for my question is thinking about previous dives where there has been avoidance of the rounded rocks as not representative of the bedrock but rather crusted over clays or such. So now I'm wondering why the difference with these ones. Is it "just" because there are so many of them here that it looks like a nodule area? [15:12:56] vondawarehamhayes leaves the room [15:13:17] @Rhian: I would expect that strong current given the little furrow we are diving in. [15:13:29] Looks like some nice Corallium ahead [15:13:34] LAT : 38.293849 , LON : -62.533484 , DEPTH : 1784.3451 m, TEMP : 4.04915 C, SAL : 34.96984 PSU, DO : 8.09593 mg/l [15:13:50] Yup, Corallium [15:14:27] Interesting how much more dense a net the branches of this colony create compared to some other corals. [15:14:40] Not all the polyps on the face facing us [15:16:07] *Note, not not [15:16:16] @ geoloists...nodule ? - Box coring in Pacific nodule fields 60's/70's lead to statement that nodules are aggregated at sediment surface. Bioturbation was suggested as an explanation. Is that statement about vert distribution in sediment still valid? [15:16:26] Saw a barnacle in those branches [15:17:13] Nudibranch or similar? [15:17:47] @bob, I think they are now able to show that some form in the sediment (diagenetic), others form on top of the sediment (hydrogenetic), and then others are kind of a hybrid of both processes [15:18:26] @jason...thanks [15:18:33] LAT : 38.293913 , LON : -62.533477 , DEPTH : 1784.9082 m, TEMP : 4.05392 C, SAL : 34.96949 PSU, DO : 8.11313 mg/l [15:18:35] Stauropathes? [15:18:55] Yes scott! [15:19:02] Maybe Paramuricea on left? [15:19:12] Paramuricea as well [15:19:16] (faster typer than me Scott!) [15:19:23] :-) [15:19:41] Lepidisis isidid [15:19:52] Hertwigia sponges [15:20:01] Bathypathes [15:21:06] I'm interested in smaller pink colony to the left [15:22:11] no, right [15:22:27] paragorgia [15:22:41] OK. [15:23:04] peterauster leaves the room [15:23:10] @Asako: at first I thought that might be a Swiftia, but it is Paragorgia [15:23:24] now I could see. Thanks Scott [15:23:33] LAT : 38.293723 , LON : -62.533565 , DEPTH : 1784.8365 m, TEMP : 4.05203 C, SAL : 34.96938 PSU, DO : 8.10358 mg/l [15:23:48] Agreed, Paramuricea. And with typical single ophiuroid in branches [15:24:03] vondawarehamhayes leaves the room [15:24:15] Most colonies have one large snake star, occasionally there are two. But more rarely are there none. [15:24:47] Check out that Paragorgia rihgt [15:25:14] is this known Paramuricea? [15:25:30] I mean... collected before? [15:26:04] @Asako: We have sampled a lot of Paramuricea in this region of the New England Seamounts, although no collections on Gosnold. [15:26:25] @Asako: See, for example, our paper Thoma et al 2009 [15:26:55] @Asako: https://www.int-res.com/abstracts/meps/v397/p25-35/ [15:28:25] @Scott thanks! [15:28:33] LAT : 38.293852 , LON : -62.533652 , DEPTH : 1784.0972 m, TEMP : 4.05242 C, SAL : 34.96933 PSU, DO : 8.11571 mg/l [15:30:10] @Asako: just checked my database and see that we collected 49 specimens from New England Seamounts. Genetics suggest there are 4 types. Let me know if you want some samples. [15:30:35] A nice Chondraster...a poraniid similar to the one we saw a few days ago [15:30:56] vondawarehamhayes leaves the room [15:30:56] Sea cuke [15:31:10] That one may have been a classic Scotoplanes sea pig [15:31:58] Just to lower left edge of where we are looking [15:32:19] @Scott oh, these Paramuricea doesn't have name!! [15:32:45] where was the Scotoplanes? [15:33:20] When we were zoomed in looking at the possible carbonate, it was just off lower frame. You could se eit briefly when we zoomed in and then out. [15:33:27] So a large part of todays dive is to make it up to the platform for geological observations, so we're going to transect a little faster here. So much good stuff to see, it's hard! [15:33:33] LAT : 38.293733 , LON : -62.533362 , DEPTH : 1784.9353 m, TEMP : 4.04533 C, SAL : 34.96933 PSU, DO : 8.08529 mg/l [15:33:37] Leiopathes! [15:34:55] stalked crinoid with hydroids on the stalk [15:35:15] kasey here while Rhian's at lunch [15:35:21] massive! [15:35:57] @Asako: at least some are P. biscaya [15:36:15] hydroids living on the stalk of that crinoid! [15:36:24] @ Scott @ Chris A Scotoplanes in NW Atlantic would be interesting. Old records having it there are pretty dubious. [15:36:56] @Scott thanks. are other three new species or known species? [15:38:34] LAT : 38.293641 , LON : -62.533441 , DEPTH : 1783.0819 m, TEMP : 4.04705 C, SAL : 34.96978 PSU, DO : 8.08439 mg/l [15:39:43] sinuous to linguoid ripples in the sediment reflecting the high current velocity [15:40:49] @Asako: good question! Jana had difficulty finding differences we could relate to descriptions. They may be new. Someone needs to dive back in. [15:41:00] vondawarehamhayes leaves the room [15:41:03] so many corals and sponges [15:41:46] @Bob @Chris: I would take my Scotoplanes ID with a grain of salt. The brief look I got was of a transparent cuke lacking a row of podia along body, so my mind filled in that there must be feeding podia. [15:42:39] @Bob @Chris: I did see herds of sea pigs in one of the NE canyons in 2014. Will have to go back to my notes to tell you which one. They were small and dense. That was in the days before we were collecting. [15:42:50] Mettalogorgia and Acanella behind it. [15:43:05] No, scratch thta. Chrysogorgia behind it. [15:43:12] and paragorgia? [15:43:22] Ignore my spelling as I type too quickly [15:43:35] LAT : 38.293634 , LON : -62.53329 , DEPTH : 1783.0095 m, TEMP : 4.04151 C, SAL : 34.96927 PSU, DO : 8.05184 mg/l [15:43:37] Yes, Paragorgia. I thought you were at lunch?! [15:43:50] it's Kasey on hian's account [15:43:53] Actinernus anemone [15:43:57] *Rhian's [15:44:01] @Kasey: haha! Got it. [15:44:29] Polymastia sponge [15:44:54] There were a couple of small fish that darted by - likely midwater fish near bottom. Very dark. [15:47:13] Regarding the abundance and diversity of benthopelagic fishes: Hard bottom, coarse sediment, lots of attached corals + high current = a general absence of fishes. Habitat is not the most favorable for fishes, or other mobile benthopelagic megafauna such as shrimps and squids [15:47:24] @Scott I can understand. so many possiblities exist in Paramuricea... but they are in clade of Paramuricea? [15:47:56] @Asako: definitely, yes. [15:48:23] is tht a sea star in antipatharian bush [15:48:35] LAT : 38.293511 , LON : -62.533226 , DEPTH : 1781.0594 m, TEMP : 4.04007 C, SAL : 34.97036 PSU, DO : 8.05981 mg/l [15:48:38] back to the right [15:48:49] Metallogorgia "juvenile" [15:48:54] Most amenable habitat for fishes in the deep ocean = horizontal or undulating terrain, very fine thick bed of sediment that fosters abundant infauna and mobile epifauna inverts as prey for fishes [15:48:59] @cris - what where you looking at [15:49:26] @Ken: we are headed up onto a plateau about 70 m above us. Should be better for the fish, based on your comments. [15:49:41] we just passed that big antipatharan bush with the sea anemone [15:49:46] @Kasey: there was a bright white spot in the upper right of the Leiopathes [15:49:48] back to the left [15:49:49] @ken, thanks for that, super helpful information for a non-fish person! [15:49:59] sorry back to the right [15:50:01] @Scott thanks. thats interesting :) [15:50:17] Ken - you are a genius at making sense out of fish! Thanks! [15:50:21] it think we have moved past it - sorry will keep an eye out for it on the next one [15:51:20] The absence of fishes is just as informative as their presence. There are a few rock-loving fishes such as the ophidioid Diplacanthapoma, but such fishes like larger features offering cracks, crevices, holes and overhangs as shelter habitat [15:51:32] This fauna is really characteristic of what has been seen at this depth on Kelvin, Manning and Retriever Seamounts, e.g. the western New England Seamounts [15:51:56] Iridogorgia on left [15:52:25] Probably I. splendens [15:52:39] Narrow spiral, so is not I. magnispiralis [15:53:09] Is that metallogorgia or not? [15:53:23] we don't have zoom on it yet (or I missed [15:53:29] we have seen several metallogorgia [15:53:32] Yes, Metallogorgia. Lots of them [15:53:34] but we can zoom on one [15:53:37] LAT : 38.293438 , LON : -62.533194 , DEPTH : 1780.639 m, TEMP : 4.04721 C, SAL : 34.96942 PSU, DO : 8.08542 mg/l [15:53:55] Sargassum on Metallogorgia [15:54:08] OPhiocreas is sleeping on the job [15:56:13] large Asconema [15:57:49] Something that mistifies me is the evolution of diversity of corals on a common habitat. All are feeding on particulates, but there must be some resource partitioning. Large polyps vs tiny polyps suggest particle selection by size?? Would be super to conduct snip sampling or a selected few of the most divergent corals, then run stable 13C, 15N & 34S stable isotope assays to illucidate trophic specialization. Need a large enough snip for soft tissue. Need a minimum N of 10 snips to get a reasonable mean. [15:58:37] LAT : 38.293268 , LON : -62.533182 , DEPTH : 1776.9869 m, TEMP : 4.04467 C, SAL : 34.9703 PSU, DO : 8.11343 mg/l [15:58:54] Corals with very tiny polyps may ignore living plankton and specialize on refractory organic particles ignored by those corals specializing on large particles??? [15:59:31] @Ken Amanda Demopoulis would be a great one to ask on stable isotopes of corals [15:59:42] Dytaster? Chris? [16:00:18] no spines [16:00:25] Pilot change [16:00:50] Might be a good shift of OE objectives to revisit THIS VERY SITE, put down markers, conduct focused coral snipping - leave the rocks alone. Learn something different and very fundamental about the ecosystem. [16:01:07] Pseudarchaster.. tube feet are suckerd.. [16:01:11] not pointed [16:02:33] @Ken: excellent questions you pose that we've thought a lot about. Of course, these corals have been evolving for 100s of millions of years, so the conditions under which they initially diversified is different from what we see today. [I know you know that!] [16:03:24] Might have been a Telopathes balck coral... [16:03:38] Anthomastus/Pseudoanthomastus [16:03:39] LAT : 38.293253 , LON : -62.533149 , DEPTH : 1778.0744 m, TEMP : 4.04771 C, SAL : 34.96938 PSU, DO : 8.08933 mg/l [16:03:51] Rhian - I brought Amanda aboard at USGS a while ago. She is doing great stuff. I have not published much on stable isotopes, but it was a big research of mine for several years, but at 300-900 m. Black corals and sponges have very very weird stable iso signatures. [16:04:23] huh.. wow. that Pseudarchaster is a new record.. whichever species it is. [16:04:59] my video skipping a lot [16:05:16] @Chris: what is the range extension? e.g. first known from NES? [16:05:37] that's the thing... I don't there's any Pseudarchaster known from Gosnold [16:05:55] *laugh* probably worth collecting if we see it again [16:06:05] To be fair, this is only the 3rd dive on Gosnold! So lots techincally not known. [16:06:20] Is it known from elsewhere on NES? [16:06:25] scott - your are indeed right on the mark. it is intellectually difficult to divorce one's self from the current ecology, historical evolution is a very big factor. still, you do not see much evidence in contemp coral diversity of competitive exclusion [16:06:29] Hah - noted Chris! [16:07:29] @Ken: agreed. This is whynI have such a difficult time answering the question of why corals are shaped the way they are. Many co-occur, so, as we've said, lots of ways to skin a cat. [16:07:41] Clavulariida! [16:07:43] megancromwell leaves the room [16:08:23] what a beauty [16:08:39] LAT : 38.293129 , LON : -62.533163 , DEPTH : 1777.1374 m, TEMP : 4.04694 C, SAL : 34.96928 PSU, DO : 8.0817 mg/l [16:08:56] C. borealis? [16:08:57] Clavularia rudis [16:09:12] ...is the name I have in my database [16:09:24] a small Echinus I think [16:09:26] but I wouldn't trust thta species ID [16:11:08] Yellow sponge, purple coral polyps. Would be super to do the Eddie Widder thing. Turn off the visible ROV lights, hit the colonies with UV and maybe find that these visible colors signal natural fluroescence [16:11:58] May have passed over a Thouarella primnoid... [16:13:40] LAT : 38.292949 , LON : -62.533113 , DEPTH : 1773.0011 m, TEMP : 4.06111 C, SAL : 34.97056 PSU, DO : 8.08483 mg/l [16:15:16] Why are there no sea pens in the sediment...? [16:15:42] Really need to learn more about recruitment of sea pens. They seem to be excessively picky. [16:15:55] There might be - I don't think we had a good enough look to exclude them - it's too far out of our tether range [16:17:28] christophermah leaves the room [16:18:05] Unusual to see an ophiuroid on the Acanella [16:18:36] haroldcarlson leaves the room [16:18:40] LAT : 38.292878 , LON : -62.532963 , DEPTH : 1770.6362 m, TEMP : 4.06444 C, SAL : 34.97063 PSU, DO : 8.06999 mg/l [16:18:48] nice nodule field [16:18:51] megancromwell leaves the room [16:19:00] @Rhain: I mean even among the pockets of sediments we are passing over. Clearly this is not pavement. There is plenty of sediment for a sea pen to squeeze into. Perhaps they don't like the confined spaces. [16:19:02] vondawarehamhayes leaves the room [16:19:30] @cindy, yes perhaps we should change the name from Gosnold to Nodule Seamount [16:19:42] Do you have a definition for a ‘coral garden’ that is supported with numbers (e.g., number of colonies/per m)? [16:19:57] I see we have gone up 10 m or so in depth, so making some headway! [16:20:03] Gosnodule Seamount [16:20:39] OSPAR definitions are >50 colonies per 100m2 and >100 coloies per 100m2 for multispecies areas [16:20:44] probably the sea pens prefer a particular texture of sediments for ther peduncles to stay in place .. we don't know but definitely needs looking into [16:20:49] @Vonda: I think Chris Kelley made some formal proposals. Will have to check to see if DSCRTP has made a statement. [16:21:02] Rhain typed faster than me! [16:21:11] Rhain: what is OSPAR? [16:21:13] thanks;) [16:21:45] @Upasana: good point. That at least is something the larva could assess. [16:22:02] yes.. [16:22:44] @ Scott https://www.ospar.org/ [16:23:40] LAT : 38.29275 , LON : -62.532925 , DEPTH : 1763.1691 m, TEMP : 4.05375 C, SAL : 34.97167 PSU, DO : 8.07659 mg/l [16:24:04] Thanks @Bob [16:24:41] midwater fish struggling in the strong current is not a myctophid, but perhaps a Cyclothone. Myctophids dart and stop, usually swimming obliquely. Stomiatiform fishes like Cycllothone undulate horizontally [16:24:52] @ Scott...so many players. [16:24:58] Thanks Ken! [16:25:10] @Bob: at least someone is taking a formal stand! [16:26:11] @Vonda: have you collected the yellow Hertwigia from your neck of the woods? [16:26:40] Anthomastus or Paragorgia recruit... [16:27:49] haroldcarlson leaves the room [16:28:06] vondawarehamhayes leaves the room [16:28:11] megancromwell leaves the room [16:28:31] @Jason, would you guess that other seamounts with botryoidal crusts at shallower depths might have nodules at 3400 m or so and deeper? Or is there something speical about the Gosnold setting? [16:28:41] LAT : 38.292633 , LON : -62.532858 , DEPTH : 1753.7427 m, TEMP : 4.05646 C, SAL : 34.97021 PSU, DO : 8.05107 mg/l [16:28:58] BTW, we are doing it again re: Corallium These are Hemicorallium, either H. niobe or H. bayeri. [16:29:26] Ack - I took your lead and started on the corallium train again! [16:29:44] Yup, my bad! [16:30:49] H. bayeri was described by Anne Simpson and Les Watling from specimens collected out here on the NES. The holotype is from Picket Seamount at 1970 m depth. [16:31:18] And named for Ted Bayer, who should have been one of the unnamed twins! [16:32:22] Metallo juvenile [16:32:27] I know - they turned out to be one seamount - but don't worry, I have plans! [16:32:35] :-) [16:32:41] @cindy, very good question. Quite possible, especially if the conditions are condsive. Yesterday's dive and the area we are looking at now share strong current conditions. Overall, I think our interpretation of the enivronments they are found is driven by a limited set of observations. Kira was mentioning yesterday that there are some records of "nodules" from other NE seamounts, which were somehwat overlooked due to lack of information....she is reassessing those assumptions now! [16:32:44] @Scott - Yes off NE Flemish Cape (ROPOS 2010 - sample at BIO). We saw it common on Orphan Knoll. [16:33:05] The sediment here my be relatively devoid of organic matter and benthos - as per two classic super papers on the 'wall of mouths' of both coral and fish planktivores. Abundant particulate filterers can deprive the downstream area and the substrate of particles. Ref: Hamner, W. M. et al 1988. Zooplankton, Planktivorous Fish, and Water Currents on a Windward Reef Face: Great Barrier Reef, Australia. Bulletin of Marine Science 42(3):459-479 Fabricius, K.E., Metzner, J. 2002. Scleractinian walls of mouths: Predation on coral larvae by corals. Coral Reefs 23, 245–248 (2004). [16:33:41] LAT : 38.292509 , LON : -62.532896 , DEPTH : 1752.9357 m, TEMP : 4.05009 C, SAL : 34.96986 PSU, DO : 8.07543 mg/l [16:33:44] @Jason is weathering basalt a source of MN and Fe ? [16:34:33] could we zoom on the boulder of the surface? lots of little disks and things.. [16:35:38] @ Scott.....your ideas sound like "research"! [16:36:01] :D [16:36:08] @bob, my understanding is that there are a range of sources of the Fe, Mn and other metals that are precipitated, with vents and chemical weathering of terrestrial environments some of the main sources. I am not sure if chemical weathering of the insitu rocks contribute to the crusts and nodules...at least locally [16:36:27] @Bob: :-) Kepp it o the down low! [16:37:02] This one looks familiar... [16:37:11] Scott - we have done the mark and return thing at 300-500 m depth in the GOM, orienting still imagery exactly the same each time. change in corals can much more rapid than we had anticipated - e.g., the spread of an overgrowing organism [16:38:39] @Ken, @Bob: we also did that on Manning Seamount at about 1340 m depth, but had only 2 visits. Not on Okeanos Explorer. That was a research cruise. [16:38:42] LAT : 38.292465 , LON : -62.532883 , DEPTH : 1750.6855 m, TEMP : 4.05779 C, SAL : 34.96961 PSU, DO : 8.09895 mg/l [16:40:19] can the star e collected [16:40:26] I hear you chris [16:40:57] Lauren Mullineaux had put out settling blocks and we went back to retrieve them. In fact, that is what led to the observations on feeding that Chris is currently describing. [16:41:26] @Chris - can you give a name to this seastar [16:41:30] For the sample ID [16:42:43] I like Ryan as a name. Oh, that is not what you were asking. ;-) [16:42:53] :) [16:43:11] I'll put that on the sample sheet and see how Kasey responds...:) [16:43:32] @ChrisM - looking for a name for this collection - I was chatting to pilots about the collection so didn't hear your name [16:43:41] LAT : 38.292488 , LON : -62.532758 , DEPTH : 1749.1614 m, TEMP : 4.05779 C, SAL : 34.97065 PSU, DO : 8.09751 mg/l [16:44:27] Pseudarchaster [16:44:35] Tahnks! [16:44:40] thank you Rhian! [16:47:06] vondawarehamhayes leaves the room [16:48:18] got to sign off for today. nice dive, interesting sessile fauna, but very unfishy. enought rocks - consider sampling the intervening soft sediment to evaluate for benthic infauna. make the Smithsonian Curator of Worms happy [16:48:42] LAT : 38.292471 , LON : -62.532848 , DEPTH : 1749.6704 m, TEMP : 4.06349 C, SAL : 34.97115 PSU, DO : 8.07895 mg/l [16:49:05] My thanks to the pilots! [16:49:11] kensulak leaves the room [16:51:06] Tall Chrysogorgia [16:51:56] Pseudomorph... suggests a squid was nearby [16:52:19] ?? @Scott [16:52:39] Mucus-ink floaty... [16:52:42] lots of black corals! [16:52:49] ah! [16:52:54] Released by squid as a defense mechanism [16:53:11] I thought you mean the chrysogorgia :) [16:53:25] Again... [16:53:34] Or is it a siphonophore? [16:53:42] LAT : 38.2923 , LON : -62.532983 , DEPTH : 1745.0404 m, TEMP : 4.05918 C, SAL : 34.97051 PSU, DO : 8.0804 mg/l [16:54:59] robertcarney leaves the room [16:55:28] christophermah leaves the room [16:57:47] a few nodules sitting on top of pavement [16:58:14] over 2000 sp of ophiuroids [16:58:27] can we get a zoom of some of those brittle stars on the rocks? [16:58:42] LAT : 38.292225 , LON : -62.532822 , DEPTH : 1742.0835 m, TEMP : 4.03243 C, SAL : 34.96959 PSU, DO : 8.11742 mg/l [17:00:43] robertcarney leaves the room: Replaced by new connection [17:01:51] @Chris: is the smaller white one Ophiomuseum? [17:01:54] can we get a zoom on the disk? [17:02:14] I wonder if those nodules formed there or rolled near there. Nicely round for sitting on uneven pavement [17:02:26] I don't think so.. possibly the white ones are something close to it. [17:02:39] The big red ones are ophiacanthids. Ophiocamax or something like it.. I thik [17:03:43] LAT : 38.292208 , LON : -62.532922 , DEPTH : 1742.5203 m, TEMP : 4.05009 C, SAL : 34.96991 PSU, DO : 8.06768 mg/l [17:04:13] vondawarehamhayes leaves the room [17:05:44] @kevin, good question. The distribution of the nodules both today and yesterday is something that needs to be looked at more closely, certainly not a simple sitting on the flat sediment type relationship [17:06:54] different sizes of the same coral species as well I think? So not a single recruitment event, but continuing at least at some interval? [17:07:15] @jason It's nice to see two different nodule forming environments from the same seamount [17:08:25] @Cindy: excellent point. [17:08:43] LAT : 38.292108 , LON : -62.532825 , DEPTH : 1738.3444 m, TEMP : 4.02223 C, SAL : 34.96976 PSU, DO : 8.05647 mg/l [17:09:20] @kevin, a lot learned on just these last two dive...going to keep Kira and colleague busy for a long time [17:11:00] BIG SOLASTR ON THAT CORAL [17:11:11] back left [17:11:33] Sorry Chris. Too mcu lag! [17:12:48] lots of xenos [17:13:44] LAT : 38.292023 , LON : -62.532853 , DEPTH : 1737.5611 m, TEMP : 4.03929 C, SAL : 34.96986 PSU, DO : 8.04125 mg/l [17:15:03] Not my group! [17:15:30] I was just curious as to the value of zooming in on that one [17:15:46] ...slow to respond, but re: monitoring growth/overgrowth/etc on long time scales, a technique that could be initiated on this cruise is to put some markers on the seabed and image a set of colonies from the same heading/altitude. Then return at intervals (1 yr, 5 yrs, etc) - cf Chuck FIsher's work following the DWH oil ing of corals in the GoM. Maybe someone already brought this up in the chat; I've been in and out... [17:16:31] I am a big advocate of exploration in the time domain as well as the spatial domain! [17:16:55] The value is that we now have the close-up so that later when a Paragorgiid expert does look at it we may be able to determine if we have one species or multiple out here. I'm always thinking of the permanent image data as a resource thta can be used. Without the close-ups we lose some value because we can't get specific IDs. [17:18:17] @Scott - that sp. did not look like the P. johnsoni we documented on Scotian Shelf [17:18:32] Thanks Scott, I guess it's just all a trade off and as far as I thought you just couldn't ID the separate Paragorgia's when their polyps are retracted. Never enough time for everything! [17:18:45] LAT : 38.291885 , LON : -62.532936 , DEPTH : 1734.2175 m, TEMP : 4.02367 C, SAL : 34.97024 PSU, DO : 8.08548 mg/l [17:19:14] @Rhina; when I asked for the close-up I did not know the polyps were retracted. I only saw a much brighter red colony than we had imaged earlier. [17:21:10] @Cindy: I think we all agree on the value (necessity!) of time series observations. Unfortunately for this program, there is only so much we can do because of time and manpower, e.g. there are no MarTechs on board and only 1 or 2 scientists. The decision has been made that we use the platform for first look and initial sampling in the hopes of providing some data for follow-up. The program continues to evlove and so these comments will be considered. But of course every addiitonal thing we do will eat away at the time available for basic observation over as much of the seafloor as we can. No perfect system! [17:21:56] Hi Tina. exact right time. [17:22:02] FYI, Leiopathes is a "shallower" dwelling taxon, which is why we have not been seeing it previously. [17:22:08] hi here! [17:23:06] yes ! sea pen !! [17:23:07] @Scott, we have seen, actually, but here it is quite more common [17:23:23] kevinkonrad leaves the room [17:23:46] LAT : 38.291772 , LON : -62.532742 , DEPTH : 1734.8518 m, TEMP : 4.00428 C, SAL : 34.96842 PSU, DO : 8.08152 mg/l [17:25:19] can be a pennatula but can be other genus from the family [17:25:37] genus changed to Ptilella ... [17:25:41] A little dismissive wave from the sea pen... [17:25:49] @Vonda: thanks [17:27:21] @scott, not all Pennatula go there) [17:28:29] white corallidae is all the same or different? [17:28:47] LAT : 38.291807 , LON : -62.532736 , DEPTH : 1731.7002 m, TEMP : 3.99247 C, SAL : 34.96924 PSU, DO : 8.05407 mg/l [17:29:03] We've had some good close ups @Tina - looks the same hemicorallium to me, but not an expert! [17:29:08] @Tina: got it. Pennatula is still a valid genus, but some species have been transferred to Ptilella [17:30:10] @Tina: got some good imagery earlier. We have previously collected 15 Corallidae from western NES. [17:30:27] @Scott - sorry - it looked like P. grandis which has been changed to Ptilella grandis. [17:30:36] and crinoids? [17:30:40] haroldcarlson leaves the room [17:31:10] @Vonda: no apologies necessary! I'm not as familair with the sea pens as you may be. [17:31:32] @Vonda: of course, as Canadians we apologize for everything! [17:31:45] Brittle star distribution looks over-dispersed....spread out [17:32:29] @Bob: interesting. Looks like at the least one per nodule. [17:32:52] to large to share.. [17:32:56] @Tina: we've collected 2 stalked crinoids today. [17:33:07] both on a rock [17:33:34] same kind? crinoids? [17:33:48] LAT : 38.291643 , LON : -62.53272 , DEPTH : 1731.1716 m, TEMP : 3.98987 C, SAL : 34.96838 PSU, DO : 8.07207 mg/l [17:33:51] No, likely 2 different crionoids [collected] [17:34:10] No idea if they are the same as we are seeing now. There are a LOT of crinoids here. [17:34:28] we have a star [17:34:46] passed [17:36:02] yellow fluffy things are zoanthids? [17:36:29] or acanthogorgia? [17:36:59] Can't tell from here if that is Acanthogorgia or zoanthids. Worth a look [colony on right] [17:37:26] We're chasing tether - once they've finished i'll ask if there is time, they didn't stop for this collect [17:37:29] Or a Paramuricea on edge, but polyps look too tall and more likely Acanthogorgia [17:37:30] ollection [17:37:51] oh, we got something [17:37:56] vondawarehamhayes leaves the room [17:37:56] lovely.. would like to know which ophiuroid that is. [17:38:01] briozoans [17:38:40] @Rhian: understood on tether/need to move. CU if time. [17:38:48] LAT : 38.291601 , LON : -62.532756 , DEPTH : 1730.588 m, TEMP : 4.00428 C, SAL : 34.96799 PSU, DO : 8.09857 mg/l [17:40:34] acantho [17:40:48] scott right [17:41:01] they have calyses [17:41:09] Paramuricea. Thanks Tina [17:41:27] Good point on the calyxes, which Acanthogorgia lacks [17:43:21] we have approximately 1:50 left on bottom [17:43:48] goniasterid! [17:43:49] LAT : 38.29148 , LON : -62.532684 , DEPTH : 1729.8544 m, TEMP : 3.98754 C, SAL : 34.96722 PSU, DO : 8.08844 mg/l [17:44:34] oops! Chondraster... poraniid from the other day [17:44:36] this one may be polychaete tube))) [17:44:46] at the stone [17:44:55] interesting- this one is pink... the others were white [17:45:17] @cris.. depend on corals they eat... [17:45:26] I wonder if they food affects teh color [17:45:31]