[15:38:15] EX2304_DIVE04 Test message [15:45:01] EX2304_DIVE04 ROV powered off [15:53:39] merlinbest leaves the room [16:14:06] rhianwaller leaves the room [16:15:54] iscwatch leaves the room [16:19:46] kellymarkello leaves the room [16:52:18] EX2304_DIVE04 ROV Launch [16:55:58] We just went in a little delayed for communications issues - delaying the dive planning call by 10 mins or so, until the vehicle is safely descending, so bear with us! [16:59:00] rhianwaller leaves the room: Replaced by new connection [16:59:22] EX2304_DIVE04 ROV on Surface [17:00:25] EX2304_DIVE04 ROV Descending [17:01:40] LAT : 53.748223 , LON : -162.582294 , DEPTH : 26.6306 m, TEMP : 9.24434 C, SAL : 32.3244 PSU, DO : 9.39747 mg/l, TURBIDITY : 0.989 FTU [17:02:10] robertcarney leaves the room [17:02:21] The dive planning call today will be for a scarp off of Lone Knoll in a Geohazards area [17:04:47] kellymarkello leaves the room [17:06:40] LAT : 53.750122 , LON : -162.586525 , DEPTH : 54.9897 m, TEMP : 5.76013 C, SAL : 32.50343 PSU, DO : 8.83262 mg/l, TURBIDITY : 0.9463 FTU [17:09:34] rhianwaller leaves the room [17:11:41] LAT : 53.751097 , LON : -162.588449 , DEPTH : 55.0892 m, TEMP : 5.66263 C, SAL : 32.52098 PSU, DO : 8.54768 mg/l, TURBIDITY : 0.9463 FTU [17:13:06] rhianwaller leaves the room [17:15:33] jenniferaschoff leaves the room [17:16:41] LAT : 53.752494 , LON : -162.589559 , DEPTH : 55.6994 m, TEMP : 5.6772 C, SAL : 32.51554 PSU, DO : 8.57545 mg/l, TURBIDITY : 0.9707 FTU [17:17:05] rhianwaller leaves the room [17:17:55] rhianwaller leaves the room: Replaced by new connection [17:20:20] kellymarkello leaves the room [17:21:42] LAT : 53.752517 , LON : -162.589504 , DEPTH : 55.6301 m, TEMP : 5.68941 C, SAL : 32.51202 PSU, DO : 8.61833 mg/l, TURBIDITY : 0.9402 FTU [17:26:42] LAT : 53.752634 , LON : -162.589353 , DEPTH : 58.5613 m, TEMP : 5.60273 C, SAL : 32.55964 PSU, DO : 8.34194 mg/l, TURBIDITY : 0.9402 FTU [17:28:52] kellymarkello leaves the room [17:30:31] rhianwaller leaves the room [17:31:43] LAT : 53.752204 , LON : -162.589257 , DEPTH : 105.0266 m, TEMP : 5.56059 C, SAL : 33.3063 PSU, DO : 4.99168 mg/l, TURBIDITY : 0.9585 FTU [17:32:30] merlinbest leaves the room [17:33:33] Hi everyone, we were a little late getting the ROV into the water this morning. Our dive brief will be delayed 25 minutes. [17:34:08] rhianwaller leaves the room [17:35:11] For those of you who are here with us already. A quick update: we found the seeps overnight with sonars, the ship is hovering on top of the seeps and ROV is on its way down to the seafloor. [17:36:43] LAT : 53.7518 , LON : -162.58914 , DEPTH : 105.8534 m, TEMP : 5.58623 C, SAL : 33.32965 PSU, DO : 4.9613 mg/l, TURBIDITY : 0.9524 FTU [17:36:51] We are at 100m at this time. Bottom times look like: 10:50 AK time; 11:50 Pacific; 14:50 Eastern; 18:50 UTC; 06:50 NZ Hope this helps. We'll keep you updated. [17:38:46] Thanks Jennifer [17:39:03] Did you see the jelly Mike?! [17:41:44] LAT : 53.751335 , LON : -162.588952 , DEPTH : 115.9933 m, TEMP : 5.66325 C, SAL : 33.45843 PSU, DO : 4.42918 mg/l, TURBIDITY : 0.9707 FTU [17:45:17] rhianwaller leaves the room: Replaced by new connection [17:46:44] LAT : 53.750819 , LON : -162.588993 , DEPTH : 241.1823 m, TEMP : 4.4939 C, SAL : 33.90098 PSU, DO : 1.57854 mg/l, TURBIDITY : 0.9829 FTU [17:49:18] Sorry, no. I have just been moderately monitoring until things get settled out. [17:49:38] doing other stuff [17:51:07] Another bloom of ctenophores here! [17:51:45] LAT : 53.750329 , LON : -162.589018 , DEPTH : 373.2297 m, TEMP : 4.17811 C, SAL : 34.04809 PSU, DO : 0.92984 mg/l, TURBIDITY : 0.9829 FTU [17:56:46] LAT : 53.749955 , LON : -162.588911 , DEPTH : 518.8022 m, TEMP : 3.96251 C, SAL : 34.13077 PSU, DO : 0.68006 mg/l, TURBIDITY : 1.4774 FTU [18:01:47] LAT : 53.74955 , LON : -162.588858 , DEPTH : 672.8319 m, TEMP : 3.69016 C, SAL : 34.19592 PSU, DO : 0.47608 mg/l, TURBIDITY : 0.9646 FTU [18:03:16] jenniferaschoff leaves the room [18:05:18] jenniferaschoff leaves the room [18:06:23] rhianwaller leaves the room [18:06:47] LAT : 53.749254 , LON : -162.588768 , DEPTH : 827.1564 m, TEMP : 3.43645 C, SAL : 34.2745 PSU, DO : 0.45684 mg/l, TURBIDITY : 0.9646 FTU [18:07:50] rhianwaller leaves the room: Replaced by new connection [18:07:57] annalienesch leaves the room [18:08:05] patrickcooper leaves the room [18:09:50] kellymarkello leaves the room [18:11:47] LAT : 53.749144 , LON : -162.588846 , DEPTH : 975.9761 m, TEMP : 3.11385 C, SAL : 34.33407 PSU, DO : 0.46563 mg/l, TURBIDITY : 0.9524 FTU [18:11:49] chrisrooper leaves the room [18:13:33] rhianwaller leaves the room [18:13:58] carolynruppel leaves the room [18:15:30] rhianwaller leaves the room [18:16:00] carolynruppel leaves the room [18:16:48] LAT : 53.749259 , LON : -162.588736 , DEPTH : 1128.6575 m, TEMP : 2.85148 C, SAL : 34.38739 PSU, DO : 0.52681 mg/l, TURBIDITY : 0.9524 FTU [18:20:41] carolynruppel leaves the room: Replaced by new connection [18:21:48] LAT : 53.749125 , LON : -162.588616 , DEPTH : 1280.4253 m, TEMP : 2.64791 C, SAL : 34.43078 PSU, DO : 0.61972 mg/l, TURBIDITY : 0.9524 FTU [18:22:08] Gorgeous map showing the plumes! Nicely done. [18:22:12] Can we do water-column transects through the bubble plumes? [18:22:53] The hope is to catch right above the seeps - do 50m above bottom, 900, 700, 500 and 300m depth. [18:23:58] I can't tell- is Shannon pleased with this map? ;-) [18:24:03] carolynruppel leaves the room [18:24:19] hah! She's grinning away here :) [18:24:50] It is a thing of beauty. [18:25:57] annalienesch leaves the room [18:26:07] carolynruppel leaves the room: Replaced by new connection [18:26:49] LAT : 53.749239 , LON : -162.588393 , DEPTH : 1435.9325 m, TEMP : 2.34799 C, SAL : 34.49131 PSU, DO : 0.93352 mg/l, TURBIDITY : 0.9524 FTU [18:26:54] I keep getting kicked out of chat...others having this issue? I'm on Chrome window [18:27:16] Shannon did a superb job with this mapping overnight. She deserves to geek out. It was a great moment this morning to receive the updated image! [18:27:49] @michaelvecchionne...I think we ARE going to do transects through the plumes...Super cool, although I'm guessing we'll have problems seeing the bubbles [18:28:03] Carolyn - it's the system, it boots us out here as well after a few minutes of silence, super frustrating... [18:28:18] I work for the federal government. Nothing surprises me. [18:29:34] :) [18:30:55] kellymarkello leaves the room [18:31:04] Thanks for the correction Carolyn. I'm coming from an oil/gas background here with hydrocarbon seeps so it's good to have reminder that these are just one type. Cheers [18:31:17] Chatroom has been very stable accessing via Firefox on my Macs. [18:31:49] LAT : 53.749367 , LON : -162.587191 , DEPTH : 1587.1495 m, TEMP : 2.23796 C, SAL : 34.51527 PSU, DO : 1.11128 mg/l, TURBIDITY : 0.9524 FTU [18:32:11] @jennifer No worries. Obviously, it is one of my "duties" to counter the idea that methane seeps are routinely contributing gas to the atmosphere other than on continental shelves [18:32:19] @Carolyn I have had problem with Chat on both chrome and Edge. I find that FireFox works best. [18:32:38] OK I will try Firefox. I can't switch to a Mac, as hinted by Scott [18:32:42] I am on Windows 10 [18:33:24] @Carolyn I sense that there is some debate about whether/how much methane might be contributed by cold methane seeps. Is that true? [18:33:33] carolynruppel leaves the room [18:34:32] In the atmosphere? [18:34:56] We know that most of the methane getting across the sea-air interface is sourced in shallow plankton processes. [18:35:07] On the shelves, yes...methane can get into the atmosphere [18:35:11] to the ocean. and then to the atmosphere. [18:36:00] SOlmissus [18:36:03] No, in the regular old ocean on continental margins, the near surface methane is mostly young and is not from fossil methane sources that feed seeps [18:36:11] Hydrocarbon seeps in general have been cited as the second largest producer of methane going to the atmosphere according to this paper. Do you agree? [18:36:15] We have proved that on the Arctic, Pacific, and Atlantic margins [18:36:47] Cold methane seeps should then be an exception to their statement? [18:36:51] LAT : 53.749229 , LON : -162.587096 , DEPTH : 1742.2192 m, TEMP : 2.11662 C, SAL : 34.53943 PSU, DO : 1.34955 mg/l, TURBIDITY : 0.9524 FTU [18:37:01] Bubbles emitted from the seafloor lose almost all their contained methane within a few hundred meters. That methane is consumed aerobically in the water column, even in the Arctic Ocean [18:37:58] The aerobic destruction does affect ocean acidity a little bit (byproduct is CO2), but it is a hard signal to detect. [18:38:46] So the deep, cold methane seeps are not contributing to this statement from authors "Hydrocarbon seeps in general have been cited as the second largest producer of methane going to the atmosphere" [18:39:29] only shelfal seeps are thus important for atmosphere. and obviously the dissociation of hydrates in permafrost. [18:39:52] There are a lot of misconceptions. A lot of overstatements. Plus a lot of evidence that anthro sources are the main cause of CH4 escape into the atmosphere, often from escape at wellheads. [18:40:48] So you believe these sort of statements are more misconceptions than disagreements? [18:41:51] LAT : 53.749114 , LON : -162.586824 , DEPTH : 1893.7857 m, TEMP : 1.99618 C, SAL : 34.5652 PSU, DO : 1.62969 mg/l, TURBIDITY : 0.9585 FTU [18:43:13] stevenauscavitch leaves the room [18:46:18] christiannilsson leaves the room [18:46:51] LAT : 53.748918 , LON : -162.586872 , DEPTH : 2015.1918 m, TEMP : 1.95946 C, SAL : 34.57286 PSU, DO : 1.75961 mg/l, TURBIDITY : 0.9951 FTU [18:48:18] we are getting to 2015 m [18:48:22] rattail [18:49:37] jamesconrad leaves the room [18:50:14] aother rattail [18:50:50] larabeckmann leaves the room [18:51:46] kellymarkello leaves the room [18:51:52] LAT : 53.748806 , LON : -162.588007 , DEPTH : 2019.4499 m, TEMP : 1.94748 C, SAL : 34.5757 PSU, DO : 1.83561 mg/l, TURBIDITY : 0.9524 FTU [18:52:00] logankline leaves the room [18:53:11] Good morning from Alaska everyone. We are close to the bottom and they are using the Blueview Scanner to get direction headings to the seep. Heading to the bottom now. [18:53:34] bottom in sight [18:53:50] EX2304_DIVE04 ROV on Bottom [18:53:58] emilycrum leaves the room [18:54:12] crab [18:54:50] looks like a desert [18:55:03] ElainaJorgensen leaves the room [18:55:08] worm tubes maybe transported downhill? [18:55:10] Rhian mentioned some chemo worm tube debris here [18:55:27] would be cool [18:55:36] very! [18:56:52] LAT : 53.748756 , LON : -162.588251 , DEPTH : 2028.7626 m, TEMP : 1.9294 C, SAL : 34.58117 PSU, DO : 1.82779 mg/l, TURBIDITY : 0.9585 FTU [18:57:42] chemo clam shell [18:58:15] definitely see stuff in the distance [18:58:58] samcandio leaves the room [18:59:44] Are the clams at the seeps Calyptogena (the vent clam I'm familiar with), or some other genus? [19:00:24] Hello all [19:00:40] Hi! [19:00:47] lebensspuren [19:00:54] Hi Lara! [19:00:57] chrisrooper leaves the room [19:01:01] Chemo tube? [19:01:08] logankline leaves the room [19:01:53] LAT : 53.748637 , LON : -162.588327 , DEPTH : 2028.5267 m, TEMP : 1.92028 C, SAL : 34.58115 PSU, DO : 1.87828 mg/l, TURBIDITY : 0.9646 FTU [19:02:08] Suggested that the pilots could follow the trail of debris [19:02:21] Seemed reasonable to me. Agree? [19:03:47] Antimora [19:03:50] Hake? [19:03:54] Pacific flatnose [19:04:07] Dang. Should have been more patient, Mike! [19:06:40] crab and rattail [19:06:49] lithodid crab [19:06:53] LAT : 53.748574 , LON : -162.588569 , DEPTH : 2023.7901 m, TEMP : 1.91998 C, SAL : 34.58025 PSU, DO : 1.93082 mg/l, TURBIDITY : 0.989 FTU [19:07:06] Correct [19:07:36] Antimora microlepis [19:08:37] parasite leach on tail [19:08:46] yuck [19:09:02] yuck indeed [19:09:31] Pretty big size, proportionately [19:09:34] like Humphry Bogart in African Queen. [19:09:38] I mean the leech [19:09:44] jenniferaschoff leaves the room [19:10:04] franktamara leaves the room [19:10:11] logankline leaves the room [19:10:42] lots of rattails here [19:11:34] Firefox lots more stable. Thank you for the hint [19:11:38] This is very exciting! [19:11:50] Tangle of tubes [19:11:53] tubeworm clump [19:11:55] LAT : 53.74839 , LON : -162.588518 , DEPTH : 2021.9373 m, TEMP : 1.93644 C, SAL : 34.57743 PSU, DO : 1.84394 mg/l, TURBIDITY : 1.0623 FTU [19:12:11] tange is a better word [19:12:17] tangle [19:12:49] cherylmorrison leaves the room [19:13:15] Living tubeworms [19:13:34] Very good.... [19:13:41] Exciting- live tubeworms! [19:13:46] Carbonate is far more ratty than in other places [19:13:49] crustaceans (crabs or squat lobsters?) also living in the tube worm matrix. [19:14:34] caprellids on tubes [19:14:38] I think that fish is a blob sculpin [19:14:56] These look like good carbonates to me to sample. [19:15:00] encrusting sponges on exposed worm tube substrate [19:15:00] franktamara leaves the room [19:15:08] logankline leaves the room [19:15:19] @steve The older papers talk about crustaceans being more common at these cold seeps than at seeps in other places. From the Rathburn et al. paper out of Lisa Levin's group: "We hypothesize this reflects relatively low levels of sulfide and possibly limited methane flux rates in Unimak sediments, as well as some degree of sediment instability. " [19:16:03] @jennifer I wonder if these will crumble if sampled. Should we wait and see where we are in an hour? [19:16:08] probably Chionoecetes this time [19:16:18] sory out of view now [19:16:38] main view is def lithodid [19:16:55] LAT : 53.748602 , LON : -162.588701 , DEPTH : 2017.6845 m, TEMP : 1.9226 C, SAL : 34.58086 PSU, DO : 1.88444 mg/l, TURBIDITY : 1.0195 FTU [19:17:08] ElainaJorgensen leaves the room [19:17:44] also moult near it? [19:18:35] beautiful tube worm "bush"! [19:18:36] franktamara leaves the room [19:19:06] samcandio leaves the room [19:19:20] indeed! great view [19:19:40] wow wow [19:20:00] cherylmorrison leaves the room: Replaced by new connection [19:20:34] It's alive (Dr. Frankenstein). [19:21:02] logankline leaves the room [19:21:23] looks like a species of Lamellibrachia - from what I've seen in the Gulf of Mexico that's a normal amount of the plume to be exposed for this genus [19:21:30] Carolyn, have you ever seen a mass of tube worms like this at a seep before? [19:21:33] high biomass, low diversity. [19:21:44] I don't have a whole lot of experience with seeps, but this looks particularly dense. [19:21:55] LAT : 53.748407 , LON : -162.588835 , DEPTH : 2013.0871 m, TEMP : 1.91174 C, SAL : 34.58189 PSU, DO : 1.86904 mg/l, TURBIDITY : 1.0012 FTU [19:21:57] franktamara leaves the room [19:22:10] @jamesconrad No, but I haven't seen a lot of seeps with worms given that I've mostly worked GoMex and Atl dives [19:22:35] I sent a screenshot to Amanda D....pretty incredible [19:22:46] amazing! [19:23:04] Not what I was expecting to see. [19:23:34] Excellent [19:23:37] These seem very dense and extensive compared to what I've seen in the Gulf of Mexico [19:23:46] Bacterial mats in the open space [19:24:02] I haven't either, but curious if this reflects depth or some other environmental control [19:24:05] yes, and likely a sulfidic (black) deposit among the worms [19:25:04] maybe sponge? [19:25:08] This looks like sponge...? [19:25:36] Iersting to sample? [19:25:40] Yes looks like an encrusting sponge [19:25:55] this is so cool! [19:25:58] so cool!!! [19:26:02] I was fooled by the white thinking from a distance that was mat, but it is the carbonate below this orange growth... [19:26:36] former tube worms that have concreted into a rock? [19:26:45] @kasey Good idea [19:26:49] also very curious about the holes... [19:26:55] LAT : 53.748268 , LON : -162.588392 , DEPTH : 2010.5347 m, TEMP : 1.92278 C, SAL : 34.58141 PSU, DO : 1.86901 mg/l, TURBIDITY : 1.0012 FTU [19:27:12] Could we zoom on the black sediments [19:27:26] copy carolyn [19:27:37] I saw what looked like red polychate palpal tentacles extending from the holes. [19:27:50] Well, from a few of the holes. [19:28:03] carolyn I would think so [19:28:08] We are zooming into the black material now [19:28:12] I saw that as well scott. could be burrows [19:28:16] robertcarney leaves the room [19:28:30] It is like a sponge overgrowing a sabellid reef... [19:28:35] this is crazy [19:28:39] kaseycantwell leaves the room [19:28:41] help us biologists! [19:28:47] franktamara leaves the room [19:29:15] agreed...the smaller ones are a different species [19:29:50] A scoop into this mass of worms + sponge would be a valuable collection, I would suggest. [19:29:55] gastropods on tube worms too [19:29:58] I'm not convinced the orange is a sponge. There is some movement We've seen orange mats just like this off California. [19:30:24] What were theey steve? [19:30:29] @Steve: yeah, just a guess on my part. Don't trust my "sponge" ID. [19:30:33] I agree with Steve... looks bacterial close up [19:30:48] Provanna-like gastropods on tubeworms [19:31:02] looks "fuzzy" like we see with some bacteria [19:31:28] I'd suggest suction sample if you do sample... [19:31:40] I think a suction sample would be exceelent. [19:31:43] kaseycantwell leaves the room [19:31:46] or excellent [19:31:55] LAT : 53.748349 , LON : -162.58857 , DEPTH : 2012.4103 m, TEMP : 1.92815 C, SAL : 34.57855 PSU, DO : 1.82298 mg/l, TURBIDITY : 1.2821 FTU [19:33:01] robertcarney leaves the room [19:33:15] jenniferaschoff leaves the room [19:33:37] This is really crazy habitat... [19:33:51] taraluke leaves the room [19:33:58] emilycrum leaves the room [19:33:58] It's amazing! [19:34:38] Worth the wait! [19:34:42] Hope a mussel could be suctioned too. tubeworms usually deep- likely require grab [19:35:16] @RobertCarney--Hi bob...If you go to Camera 2, have you seen such tubeworm densities in the Gulf before? [19:35:29] Good for you both- yes, worth the wait for sure! [19:35:52] @Cheryl--Think these are clams? Amanda told me that if we saw a mussel to definitely get it since she says they haven't been sampled at these Pac seeps yet? Just clams?? [19:35:54] other seeps might disappoint a bit after this one lol [19:36:08] rhianwaller leaves the room [19:36:30] What is the mass on the tube in center? Looks like an egg clump. [19:36:34] Congrats to the whole team on the ship for putting us down where we needed to be... [19:36:47] Wish Lisa Levin could be here to see this - she's on a cruise right now! [19:36:56] LAT : 53.74829 , LON : -162.588393 , DEPTH : 2012.3555 m, TEMP : 1.92642 C, SAL : 34.57799 PSU, DO : 1.75353 mg/l, TURBIDITY : 0.989 FTU [19:37:08] cherylmorrison leaves the room [19:37:08] Lisa's papers are so well-written that they have been a great guide though, even for me as a non-bio [19:37:12] @Scott - maybe it is an anemone? [19:37:14] Roger on the mussels Carolyn, if we see some we will sample [19:38:02] @Alexis: I did see an anemone on another ube, but this one looks a bit different. But could be for sure. [19:38:13] christophermah leaves the room [19:38:13] robertcarney leaves the room [19:38:46] Those are mussels under there, they're ging to try to get one [19:39:16] Mussel too big for the tube [19:39:17] Yikes! That is a mouthful. [19:39:56] taraluke leaves the room [19:40:08] That will be a fun slurp sample to process tonight... [19:40:12] jamesconrad leaves the room [19:40:51] Hopefully a couple of the small worms got in there. [19:41:16] e.g. not the Lamellibranch tube worms, but the saller tube worms [19:41:21] We are going to take the clam/mussel in a bio box [19:41:23] *smaller [19:41:56] LAT : 53.74834 , LON : -162.588486 , DEPTH : 2012.9045 m, TEMP : 1.92732 C, SAL : 34.57782 PSU, DO : 1.7539 mg/l, TURBIDITY : 1.3431 FTU [19:42:26] if anyone can tell from teh video if it's a see mussel or clam that would be helpful [19:43:01] robertcarney leaves the room [19:43:12] taraluke leaves the room [19:43:20] Twofer! [19:43:21] larabeckmann leaves the room [19:43:58] I didn't see it attached by byssal threads, so I would guess clam. [19:44:17] jenniferaschoff leaves the room [19:44:17] The dead shells we saw earlier I also thought were clams. [19:44:36] Agree scott didn't see any threads [19:44:58] The earlier ones were clams and we saw some live ones that were for sure clams, this is just smaler [19:46:01] robertcarney leaves the room [19:46:41] See when it makes it up I guess! [19:46:55] rhianwaller leaves the room: Replaced by new connection [19:46:57] LAT : 53.748251 , LON : -162.588263 , DEPTH : 2009.3964 m, TEMP : 1.93221 C, SAL : 34.57792 PSU, DO : 1.85125 mg/l, TURBIDITY : 1.2271 FTU [19:47:31] Does someone want to pipe up and say something about how long tubeworms live at cold seeps and how long they take to get this long? [19:47:56] Think the listeners would be interested in that. [19:48:04] Johndeitz leaves the room [19:48:47] This is from Chuck Fisher's 2002 NOAA mission log for Gulf of Mexico: We have been studying the tubeworms at the cold seeps in the Gulf of Mexico for about 15 years and have learned that these tubeworms are, in some ways, even stranger than the tubeworms found around hydrothermal vents. The cold seep tubeworms grow fairly quickly for about ten years, but then grow very slowly for a long time. A middle-aged tubeworm will grow only about 1 centimeter per year. We discovered this by staining the tubeworms blue and then coming back a year later to see how much they had grown. After we did this to hundreds of tubeworms over the course of several years, we calculated their ages and discovered that they are the longest lived animals that we know of on Earth. They can easily live for more than 200 years! [19:48:49] cherylmorrison leaves the room [19:48:51] taraluke leaves the room [19:48:58] samcandio leaves the room [19:48:59] https://oceanexplorer.noaa.gov/explorations/02mexico/background/tubeworms/tubeworms.html [19:49:00] emilycrum leaves the room [19:49:09] I can read that out in a minute [19:49:11] crustaceans conspicuously missing [19:49:20] I don't know if if it "current". [19:49:41] The next paragraph goes on to say how they live off the sulfide in the sediments. [19:50:13] I think a cool addition to the story Carolyn relates is the science in how they did it. Basically deploying a bag around a clump and introducing a dye that stained the tubes, and then going back later to see how much growth of the tubes appeared post-dyed ring, and back vcalculating age from that growth rate. [19:50:52] Oh - I see the stain detail was in that post. Oops! Sorry Carolyn. [19:50:58] https://www.springer.com/us/about-springer/media/research-news/all-english-research-news/is-this-gulf-of-mexico-tubeworm-the-longest-living-animal-in-the-world-/13306910 [19:51:53] I missed the bit about longest lived because well, we get corals that are 6000 years old...:) [19:51:55] That's a post about a paper from Erik Cordes' lab about growth rates of Escarpia in the GoM [19:51:59] LAT : 53.748569 , LON : -162.588254 , DEPTH : 2016.4297 m, TEMP : 1.92952 C, SAL : 34.57683 PSU, DO : 1.90282 mg/l, TURBIDITY : 0.9768 FTU [19:52:01] Scott, they use those devices to collect tubeworms clumps as well. I've seen them in action at the East Pacific Rise. [19:52:12] @Rhian: good one! Coral snobbery! :-) [19:52:22] ha [19:52:37] Not bad for a worm, though, eh? [19:52:59] coral are colonies. However, I think the fish people would nominate Greenland Sleeper Sharks @ ca. 600 years old. [19:53:22] Hah, too true Mike and Scott...:) [19:54:04] christophermah leaves the room [19:54:18] Rhian went off to lunch, Anna Lienesch in place [19:54:20] robertcarney leaves the room [19:56:59] LAT : 53.748562 , LON : -162.588645 , DEPTH : 2024.0621 m, TEMP : 1.92499 C, SAL : 34.57902 PSU, DO : 1.87418 mg/l, TURBIDITY : 1.0317 FTU [19:57:51] taraluke leaves the room [20:01:02] robertcarney leaves the room [20:01:59] LAT : 53.748369 , LON : -162.588475 , DEPTH : 2014.4364 m, TEMP : 1.92606 C, SAL : 34.57916 PSU, DO : 1.83793 mg/l, TURBIDITY : 0.9646 FTU [20:04:06] siphonophore [20:04:13] Biologists? orange guy? [20:04:20] gently chewed up [20:04:22] siphonophore [20:04:24] awesome! [20:04:25] Siphonophore [20:04:35] siphonophore [20:04:49] e.g. pelagic colonial hydrozoan [20:05:22] christophermah leaves the room [20:07:00] LAT : 53.7483 , LON : -162.588794 , DEPTH : 2012.3231 m, TEMP : 1.92511 C, SAL : 34.5791 PSU, DO : 1.83478 mg/l, TURBIDITY : 0.9646 FTU [20:07:51] taraluke leaves the room [20:08:00] logankline leaves the room [20:08:07] Tina: are you not going to slurp for larvae? [20:08:13] just FYI we can hear someone breathing in the mic ;) [20:08:17] jenniferaschoff leaves the room [20:08:37] Johndeitz leaves the room [20:08:39] Nice patch of bivalves... [20:08:43] kaseycantwell leaves the room [20:08:53] Sure look like clams to me. [20:09:40] whta is the black thing? [20:09:43] What is the dark... hair barette in the center? [20:10:03] oh Acharax shell [20:10:17] https://www.google.com/url?sa=i&url=http%3A%2F%2Fwww.marinespecies.org%2Faphia.php%3Fp%3Dtaxdetails%26id%3D599353&psig=AOvVaw2B2gKlU0jU-i4_oBES-U82&ust=1689797375832000&source=images&cd=vfe&opi=89978449&ved=0CBEQjhxqFwoTCJD1r_SHmYADFQAAAAAdAAAAABAE [20:10:24] Tina: Bathymodiolus/// it is quite rich patch in fact with Bethagreid crabs... fish whatever it called/// and hundreds of tiny things.... [20:10:27] Bivalves have short siphons with incurrent and excurrent fused together. [20:11:03] Tina to @Scot: tell Scott, clams are white) [20:11:50] I think we need to get some good closeups of these bivalve clutches. The ones buried in the sediment were surely clams. These look a lot like mussels. If they are, this is very significant [20:11:52] Are the orientations of the worm tubes indicative of currents in these areas? [20:12:00] LAT : 53.748004 , LON : -162.588592 , DEPTH : 2009.1705 m, TEMP : 1.92642 C, SAL : 34.57889 PSU, DO : 1.85852 mg/l, TURBIDITY : 0.9646 FTU [20:12:13] Tina: I hope these are limpets [20:12:29] @Asako: Tell Tina I know the clams are white. She didn't see me pointing to the white bivalves! :-) [20:12:39] Anna: would we expect to see a change in biology as we get closer to bubbles? [20:13:01] asako there are definitely limpets on the tubes of th etubeworms [20:13:01] robertcarney leaves the room [20:13:13] I agree with Alexis that the dark shell ealier looks like Acharax [20:13:17] Barry & Kochevar describe a clam up to 24 cm in the Eastern Pacific, Calyptogena diagonalis, quite asymmetric and looks like a mussel [20:13:35] https://www.mbari.org/wp-content/uploads/2015/11/Barry-and-Kochevar-1999-C.-diagonalis.pdf [20:14:09] Levin found Acharax near here [20:14:54] @Scott, @Tara: copied to Tina! [20:15:00] This is amazing! [20:16:10] Tina to @Rhian: are you not going to slurp for larvae? [20:16:23] Tina: Acharax has very particulare edge of valce... [20:17:00] We are going to move north here a bit to try to find bubbles - we might have some blue water as it's going a bit deeper, but as the priority is bubbles that is what we thinkg will be best to see them. [20:17:01] LAT : 53.748659 , LON : -162.588843 , DEPTH : 2019.8011 m, TEMP : 1.92308 C, SAL : 34.57991 PSU, DO : 1.91458 mg/l, TURBIDITY : 0.9707 FTU [20:17:14] robertcarney leaves the room [20:17:28] @Asako, larvae would sadly go right through the slurp filters here ...:) [20:17:40] Tina: black things are attachments of bissus [20:17:51] taraluke leaves the room [20:18:05] christophermah leaves the room [20:18:16] @Rhian: copied that! [20:19:09] Bathyraja [20:20:46] kellymarkello leaves the room [20:20:49] Bolinopsis microptera/infundibulum [20:21:27] Will need to get a clear closeup of the junction of meridional and adradial canals later to work out which [20:21:33] Tina: I would not say like strawberries, but definitely as carrots) [20:22:01] LAT : 53.748614 , LON : -162.589025 , DEPTH : 2020.3835 m, TEMP : 1.92046 C, SAL : 34.5793 PSU, DO : 1.87122 mg/l, TURBIDITY : 1.0073 FTU [20:27:01] LAT : 53.748774 , LON : -162.588899 , DEPTH : 2026.3617 m, TEMP : 1.91634 C, SAL : 34.58141 PSU, DO : 1.9042 mg/l, TURBIDITY : 0.989 FTU [20:27:05] taraluke leaves the room [20:28:26] robertcarney leaves the room [20:29:26] So what do you see on the BlueView? [20:29:28] Looking to ample the carbonate [20:29:29] sample [20:29:40] This definitely looks promising here [20:29:43] chrisrooper leaves the room [20:29:58] Is the white shadowy stuff on the seafloor bacterial mat? [20:30:09] Those gray blobs look like mats [20:30:31] rcck...shattered pavement like [20:31:07] Yep....agree Rhian Thank you [20:31:34] gray looks like burrow ejecta...color consistent with reducing sediment [20:31:51] Lisa's papers talk about the rocks being 100% covered with animals [20:32:01] LAT : 53.748513 , LON : -162.589314 , DEPTH : 2019.747 m, TEMP : 1.90966 C, SAL : 34.58218 PSU, DO : 1.95834 mg/l, TURBIDITY : 1.0195 FTU [20:32:47] kaseycantwell leaves the room [20:35:08] christophermah leaves the room [20:35:14] robertcarney leaves the room [20:37:02] LAT : 53.748731 , LON : -162.589428 , DEPTH : 2023.749 m, TEMP : 1.90733 C, SAL : 34.58283 PSU, DO : 1.92339 mg/l, TURBIDITY : 1.0012 FTU [20:37:45] heatherjudkins leaves the room [20:37:58] kaseycantwell leaves the room [20:38:30] rocks have complex structure of surfaces and voids [20:39:24] There are some black cobbles mixed in [20:40:04] christiannilsson leaves the room [20:40:12] robertcarney leaves the room [20:40:24] rhianwaller leaves the room [20:41:54] chrisrooper leaves the room [20:42:03] LAT : 53.7488 , LON : -162.589535 , DEPTH : 2023.8512 m, TEMP : 1.90315 C, SAL : 34.58602 PSU, DO : 1.95167 mg/l, TURBIDITY : 1.7705 FTU [20:42:25] annalienesch leaves the room [20:42:53] heatherjudkins leaves the room [20:44:02] Given the location, cobbles are most likely ice rafted [20:44:09] ok, we have a sample. it was tricky because a lot of these are fairly well attached. [20:44:28] Yes! agree robert. We saw a bunch of the ice-rafted cobbles on D2 [20:44:49] taraluke leaves the room [20:44:55] it looks as though they have been integrated in the carbonate [20:46:01] robertcarney leaves the room [20:47:04] LAT : 53.748708 , LON : -162.589543 , DEPTH : 2022.1766 m, TEMP : 1.89855 C, SAL : 34.58484 PSU, DO : 1.93008 mg/l, TURBIDITY : 0.9707 FTU [20:47:05] christophermah leaves the room [20:47:41] Quad is back on Carolyn, so ou can see the blueview [20:48:35] christiannilsson leaves the room: Replaced by new connection [20:48:39] So much stuff in water here....Finding a bubble stream is definitely a challenge...Looks like another hill of tubes over there [20:49:17] jenniferaschoff leaves the room [20:50:04] robertcarney leaves the room [20:50:23] basket star [20:50:50] soft coral on tw ? [20:51:17] lots of nice hydroids on those worm tubes [20:51:40] and caprellid amphipods [20:52:03] ElainaJorgensen leaves the room [20:52:04] LAT : 53.748503 , LON : -162.589402 , DEPTH : 2019.5378 m, TEMP : 1.8982 C, SAL : 34.58349 PSU, DO : 1.97217 mg/l, TURBIDITY : 0.9707 FTU [20:52:37] wonder if Abyssododecas styx? [20:52:40] gorgeous! [20:53:31] robertcarney leaves the room [20:54:45] ElainaJorgensen leaves the room: Replaced by new connection [20:55:27] cold seeps can have a slow to dissipate reservoir of methane...methane hydrates [20:55:33] moridae? [20:56:16] jenniferaschoff leaves the room [20:56:27] these bivalves have residual periostricum at the shell edge... mussel-like [20:56:35] @robertcarney...I'll get to the hydrates if we ever see some methane [20:57:05] LAT : 53.748387 , LON : -162.589457 , DEPTH : 2014.981 m, TEMP : 1.89539 C, SAL : 34.5845 PSU, DO : 1.9771 mg/l, TURBIDITY : 0.989 FTU [20:57:25] Coryphaenoides [20:57:34] dark rattail [20:57:39] @robertcarney...We've been going back and forth clam and mussels. So your insight helpful. [20:58:14] multiple tubeworms species as well as the Calyptogena? [20:59:08] robertcarney leaves the room [20:59:19] jenniferaschoff leaves the room [20:59:46] Are these worms that carry endosymbionts (bacteria?) and if so, how do they supply methane to their endosymbionts? [21:01:29] jenniferaschoff leaves the room [21:01:30] Gotta go for a while. Happy bubble hunting. [21:01:34] I believe they ingest the symbiont when a larva so horizontal transmission and then the symbiont reproduces and lives in the trophosome [21:01:55] scottfrance leaves the room [21:02:00] since the worms do not have a mouth they cannot eat once developed [21:02:05] LAT : 53.748364 , LON : -162.589292 , DEPTH : 2014.9691 m, TEMP : 1.89115 C, SAL : 34.58462 PSU, DO : 1.93456 mg/l, TURBIDITY : 0.9829 FTU [21:02:42] they absorb the methane from the thinner end of the tube deep in the mud [21:03:46] That's wild, thanks! @dhugallindsay [21:04:23] logankline leaves the room [21:04:25] I thought the worms mostly live on sulfide? Like the clams? [21:04:56] OK I sent Amanda Demopoulos a screenshot of those huge clam/mussels that were mostly not buried in sediment [21:05:27] She says they are large calypogena (clams) with some limpets in there too. I told her I was going to quote her on that here and she said OK [21:05:45] The thin-walled buried section of the tw can be as long to 5 times the length of the harder exposed section. The tube-building end of the worm is segmented and has cheate. It is mobile and can explore the interstitial environment. [21:05:51] yes [21:06:20] Thanks [21:06:41] I think it is sulfide [21:07:05] LAT : 53.748378 , LON : -162.589092 , DEPTH : 2015.0903 m, TEMP : 1.8902 C, SAL : 34.58535 PSU, DO : 1.95598 mg/l, TURBIDITY : 0.9646 FTU [21:07:11] (agreeing with Carolyn earlier about what tube worms use as nutrition) [21:07:40] the gammaproteobacteria are sulfur oxidizers [21:08:14] bubble source? [21:08:16] jenniferaschoff leaves the room [21:08:19] exposed hydrate? [21:08:42] bubbling could be intermittent over time [21:08:52] Nice! [21:09:15] awesome! [21:09:33] Incredible! [21:10:33] oh wow! [21:10:41] So amazing to see! [21:10:51] In previous years with Nautilus/Hercules off of the Cascadia margin, we've observe that the pressur of the vehicle settling on the seafloor can "turn on" or "turn off" gas bubbles [21:11:02] That was a great explanation! Thank you! [21:11:11] sorry yes hydrogen sulfide [21:11:24] Really interesting! Thanks Carolyn! [21:11:52] yes- the anemones! [21:11:54] Alysia-like worms as well as the Lamellobrachia-like ones [21:12:06] LAT : 53.748542 , LON : -162.589074 , DEPTH : 2017.628 m, TEMP : 1.88703 C, SAL : 34.5845 PSU, DO : 1.95075 mg/l, TURBIDITY : 0.9646 FTU [21:12:13] We do not get carried away [21:12:18] ! [21:12:20] anenomes around the fissure is curious... [21:12:24] We get enthusiastic [21:12:30] What do anenomes like? [21:13:05] Particles in the seawater, they also like crustaceans (amphipods) - they're not too picky, they just like to live in areas with a lot of food [21:13:21] if particle feeding one would expect to find them on any raised surface where currents are slightly stronger [21:13:44] but these are concentrated around the fissure so something weird going on there I guess [21:14:18] BUBBLES!! [21:14:21] bubbles! [21:14:46] maybe the currents made by rising bubbles are stronger than the regular seafloor currents to increase particle feeding efficiency? [21:14:50] that was great [21:15:09] gastropod!! [21:15:13] zoom? [21:15:24] snail above the anenome on right [21:15:47] samcandio leaves the room [21:16:57] several different gastropod species. seems quite high diversity [21:16:59] more hydrate under that carbonate in front of the one we were looking at too [21:17:07] LAT : 53.748473 , LON : -162.589048 , DEPTH : 2015.5866 m, TEMP : 1.88303 C, SAL : 34.58713 PSU, DO : 1.96498 mg/l, TURBIDITY : 0.9646 FTU [21:17:27] that was super cool [21:17:41] chrisrooper leaves the room [21:18:49] @carolyn, it's always bothered me that erosion seems to be required to expose authigenic carbonates, but most of the ocean floor is not subject to erosion - is it the accumulation of massive hydrate like tis that brings these chunks of carbonate up to the seafloor? [21:19:56] sometimes there is "inflation" under these carbonates for sure...but the carbonate is hard and the sediment is soft, so we dno't think it takes much to expose them [21:20:35] yeah so the pilot has confirmed the upward flow we saw was not D2 [21:20:40] I have lost the full-res feed. Is that just local to me? [21:20:53] Still up for me [21:20:55] So if that upward flow is not D2, it was likely sediment entrained in seep fluids [21:21:02] That's why I asked. Thank you [21:21:18] robertcarney leaves the room [21:21:32] It just came back. Probably local. [21:22:08] LAT : 53.748183 , LON : -162.589509 , DEPTH : 2012.2241 m, TEMP : 1.87509 C, SAL : 34.58793 PSU, DO : 1.99694 mg/l, TURBIDITY : 0.9646 FTU [21:23:20] Food fall! [21:23:34] Rather kelp than trash...Glad to not have seen trash on this dive so far [21:24:53] Its so rare that we don't see trash.... [21:25:46] rhianwaller leaves the room: Replaced by new connection [21:26:03] ElainaJorgensen leaves the room [21:26:36] @ james conrad...hydrate formation can heave overlying carbonte and sediment [21:27:08] LAT : 53.748318 , LON : -162.589317 , DEPTH : 2015.4552 m, TEMP : 1.87557 C, SAL : 34.58756 PSU, DO : 1.98944 mg/l, TURBIDITY : 1.0867 FTU [21:27:34] Speaking of food falls, organic falls have their sulfide supplied via anaerobic breakdown of the organic matter but where does the sulfide in a methane seep usually come from? [21:27:49] All we are thinking of picking up the pace and moving along [21:27:56] Good idea Jennifer [21:28:10] Does it also stem from biological processes? [21:28:49] Sulfide mostly comes from seawater... sufate ion is abundant [21:29:44] these carbonates appear very similar to hydrothermal tuffas... I would assume the processes are similar. What are the key differences? Anyone know? [21:30:00] very regular groth bands on tubes [21:30:08] growth [21:30:11]