Comments on: Deep corals are old as the hills, archives of climate change http://deepseanews.com/2008/04/deep-corals-are-old-as-the-hills-archives-of-climate-change/ All the news on the Earth's largest environment. Sun, 14 Mar 2010 22:25:25 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: Deep-corals are world’s oldest animal | Deep Sea News http://deepseanews.com/2008/04/deep-corals-are-old-as-the-hills-archives-of-climate-change/comment-page-1/#comment-5971 Deep-corals are world’s oldest animal | Deep Sea News Wed, 25 Mar 2009 15:14:44 +0000 http://deepseanews.com/2008/04/deep-corals-are-old-as-the-hills-archives-of-climate-change/#comment-5971 [...] consider. First, benthic cnidarians are one of the most basal groups in the tree of life, perhaps the oldest metazoans, in the fossil record back to the Proterozoic. Let’s just say they’re highly adapted to [...] [...] consider. First, benthic cnidarians are one of the most basal groups in the tree of life, perhaps the oldest metazoans, in the fossil record back to the Proterozoic. Let’s just say they’re highly adapted to [...]

]]> By: Peter Etnoyer http://deepseanews.com/2008/04/deep-corals-are-old-as-the-hills-archives-of-climate-change/comment-page-1/#comment-5260 Peter Etnoyer Wed, 11 Feb 2009 17:39:55 +0000 http://deepseanews.com/2008/04/deep-corals-are-old-as-the-hills-archives-of-climate-change/#comment-5260 I should have said "...creatures who have ancestors that are still alive today..." I should have said “…creatures who have ancestors that are still alive today…”

]]> By: Peter Etnoyer http://deepseanews.com/2008/04/deep-corals-are-old-as-the-hills-archives-of-climate-change/comment-page-1/#comment-5259 Peter Etnoyer Wed, 11 Feb 2009 17:38:21 +0000 http://deepseanews.com/2008/04/deep-corals-are-old-as-the-hills-archives-of-climate-change/#comment-5259 Kelsey, why don't you try and identify the creatures from the image above that are still alive today, and those that are extinct? Could that be a good project for your poster? Kelsey, why don’t you try and identify the creatures from the image above that are still alive today, and those that are extinct? Could that be a good project for your poster?

]]> By: Kelsey http://deepseanews.com/2008/04/deep-corals-are-old-as-the-hills-archives-of-climate-change/comment-page-1/#comment-5254 Kelsey Wed, 11 Feb 2009 14:38:45 +0000 http://deepseanews.com/2008/04/deep-corals-are-old-as-the-hills-archives-of-climate-change/#comment-5254 We're doing a piece on the Devonian time period for a class I'm taking and I need some good ideas for our poster we have to make. Got any? We’re doing a piece on the Devonian time period for a class I’m taking and I need some good ideas for our poster we have to make. Got any?

]]> By: Kelsey http://deepseanews.com/2008/04/deep-corals-are-old-as-the-hills-archives-of-climate-change/comment-page-1/#comment-5253 Kelsey Wed, 11 Feb 2009 14:34:50 +0000 http://deepseanews.com/2008/04/deep-corals-are-old-as-the-hills-archives-of-climate-change/#comment-5253 It definatly gives them brag rights and u all r very smrt It definatly gives them brag rights and u all r very smrt

]]> By: Peter http://deepseanews.com/2008/04/deep-corals-are-old-as-the-hills-archives-of-climate-change/comment-page-1/#comment-2870 Peter Fri, 02 May 2008 17:58:37 +0000 http://deepseanews.com/2008/04/deep-corals-are-old-as-the-hills-archives-of-climate-change/#comment-2870 Hell again Bridget, It looks like Marine Ecology Progress Series is a good place to go for more info. I just found a paper (Williams et al 2007 MEPS 335:85-95) that cites another paper (Sherwood et al 2005 MEPS 301:135-148) for a strong correlation between apparent oxygen utilization and carbon and nitrogen isotopes, showing gorgonians record surface water processes. Some of these include atmospheric CO2 and in situ carbon production. These isotope values will vary with each annual ring, showing increase, decrease, or steady state conditions over time. Peter Hell again Bridget, It looks like Marine Ecology Progress Series is a good place to go for more info. I just found a paper (Williams et al 2007 MEPS 335:85-95) that cites another paper (Sherwood et al 2005 MEPS 301:135-148) for a strong correlation between apparent oxygen utilization and carbon and nitrogen isotopes, showing gorgonians record surface water processes. Some of these include atmospheric CO2 and in situ carbon production. These isotope values will vary with each annual ring, showing increase, decrease, or steady state conditions over time. Peter

]]> By: Peter http://deepseanews.com/2008/04/deep-corals-are-old-as-the-hills-archives-of-climate-change/comment-page-1/#comment-2869 Peter Fri, 02 May 2008 15:01:12 +0000 http://deepseanews.com/2008/04/deep-corals-are-old-as-the-hills-archives-of-climate-change/#comment-2869 This is not my specialty, Bridget, but author Mike Risk writes saying this is "an ENORMOUS field, with hundreds of papers. The first was the accidental discovery, by Steve Smith, that hard corals had annual banding. He was working in Bikini, on effects of nuclear weapons testing-had some corals that had been dosed with radioactivity. He decided (why, we will never know) to X-ray them..." Mike recommends papers by Heikoop et al 2002 in Hydobiologia and Edinger et al 2000 in Pollution Bulletin. I can add that Sr/Ca data analyzed by Secondary Ion Mass Spectrometry (SIMS) suggests temperature might control calcite Sr/Ca ratios in the deep gorgonian Primnoa resedaeformis, so these ratios may be used to reconstruct ocean temperatures. Hopefully someone how knows more will chime in! This is not my specialty, Bridget, but author Mike Risk writes saying this is “an ENORMOUS field, with hundreds of papers. The first was the accidental discovery, by Steve Smith, that hard corals had annual banding. He was working in Bikini, on effects of nuclear weapons testing-had some corals that had been dosed with radioactivity. He decided (why, we will never know) to X-ray them…” Mike recommends papers by Heikoop et al 2002 in Hydobiologia and Edinger et al 2000 in Pollution Bulletin.

I can add that Sr/Ca data analyzed by Secondary Ion Mass Spectrometry (SIMS) suggests temperature might control calcite Sr/Ca ratios in the deep gorgonian Primnoa resedaeformis, so these ratios may be used to reconstruct ocean temperatures. Hopefully someone how knows more will chime in!

]]> By: BridgetM http://deepseanews.com/2008/04/deep-corals-are-old-as-the-hills-archives-of-climate-change/comment-page-1/#comment-2868 BridgetM Thu, 01 May 2008 23:06:37 +0000 http://deepseanews.com/2008/04/deep-corals-are-old-as-the-hills-archives-of-climate-change/#comment-2868 So I don't quite understand the relation between the annual growth rings and being able to determine changes in the climate. I'm writing a thesis for my undergraduate degree on corals and climate change, so this subject is of huge interest to me! I've currently been interested in trying to find more research on the presence of corals during time of change in climate throughout history. Do you have any suggestions as to where to look for these kinds of records for shallow or deep water corals if there are any? Thanks! So I don’t quite understand the relation between the annual growth rings and being able to determine changes in the climate. I’m writing a thesis for my undergraduate degree on corals and climate change, so this subject is of huge interest to me! I’ve currently been interested in trying to find more research on the presence of corals during time of change in climate throughout history. Do you have any suggestions as to where to look for these kinds of records for shallow or deep water corals if there are any? Thanks!

]]> By: Luiz Ramos http://deepseanews.com/2008/04/deep-corals-are-old-as-the-hills-archives-of-climate-change/comment-page-1/#comment-2867 Luiz Ramos Wed, 30 Apr 2008 21:47:19 +0000 http://deepseanews.com/2008/04/deep-corals-are-old-as-the-hills-archives-of-climate-change/#comment-2867 Good subject. Good subject.

]]> By: Peter http://deepseanews.com/2008/04/deep-corals-are-old-as-the-hills-archives-of-climate-change/comment-page-1/#comment-2866 Peter Wed, 30 Apr 2008 21:16:02 +0000 http://deepseanews.com/2008/04/deep-corals-are-old-as-the-hills-archives-of-climate-change/#comment-2866 Absolutely, Jason. We are talking about colonial animals. It has been conjectured, actually, that some large old colonies of bamboo corals actually died at some point in the past. The skeletal axis was recolonized by planula larvae, or grown over by parts that survived. It's kind of a resurrection hypothesis. Absolutely, Jason. We are talking about colonial animals. It has been conjectured, actually, that some large old colonies of bamboo corals actually died at some point in the past. The skeletal axis was recolonized by planula larvae, or grown over by parts that survived. It’s kind of a resurrection hypothesis.

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