Phil Jones and ‘climategate’: “The leak was bad. Then came the death threats.”

This article (surprisingly enough from the usually right-leaning Times newspaper) is striking in it’s honesty. I’m not condoning Jones’s actions regarding the FOI, but given the following response, it’s understandable (back of the envelope calculations: 60 FOI requests in a single month, at 18hrs per request is 1080hrs, or 27 weeks of work of work. With a staff of 13, over half of that month would be dedicated to responding to FOI requests alone – that’s alot of time not doing science. Wait, maybe that’s the point?):

Photographs of Professor Phil Jones show a handsome, smiling, confident-looking man. Not chubby exactly, but in blooming good health. The man who meets me at the University of East Anglia (UEA) looks grey-skinned and gaunt, as if he has been kept in prison.

In a way, he has. Since November last year he has been a prisoner of public opprobrium and a target of such vilification that was he was almost persuaded to comply with the wishes of those who wanted him dead.

In bare outline, the story of the Climatic Research Unit emails — “Climategate” — is well known.

Unidentified hackers broke into the UEA website and made off with more than a thousand emails, plus some data and program files dating back over 13 years. The thieves’ eureka moment came when they found messages from Jones, the unit’s director, and others apparently encouraging climate scientists to refuse freedom of information (FoI) requests from known climate sceptics, and even to destroy data rather than surrender them to anyone they feared might misuse them.

At the worst possible time, in the days immediately before the Copenhagen climate summit in December, it enabled sceptics across the globe to claim that climate science was fatally flawed and its practitioners a shifty gang who twisted the facts to suit their agenda and shut out anyone who disagreed with them.

Jones insists that is not the way it was, but concedes it was the way it may have looked. He now accepts that he did not treat the FoI requests as seriously as he should have done. “I regret that I did not deal with them in the right way,” he told The Sunday Times. “In a way, I misjudged the situation.”

But he pleads provocation. Last year in July alone the unit received 60 FoI requests from across the world. With a staff of only 13 to cope with them, the demands were accumulating faster than they could be dealt with. “According to the rules,” says Jones, “you have to do 18 hours’ work on each one before you’re allowed to turn it down.” It meant that the scientists would have had a lot of their time diverted from research.

A further irritation was that most of the data was available online, making the FoI requests, in Jones’s view, needless and a vexatious waste of his time. In the circumstances, he says, he thought it reasonable to refer the applicants to the website of the Historical Climatology Network in the US.

He also suspected that the CRU was the target of a co-ordinated attempt to interfere with its work — a suspicion that hardened into certainty when, over a matter of days, it received 40 similar FoI requests. Each applicant asked for data from five different countries, 200 in all, which would have been a daunting task even for someone with nothing else to do. It was clear to Jones that the attack originated from an old adversary, the sceptical website Climate Audit, run by Steve McIntyre, a former minerals prospector and arch climate sceptic.

“We were clearly being targeted,” says Jones. “Only 22% of the FoI enquiries were identifiably from within the UK, 39% were from abroad and 39% were untraceable.” What irked him was that the foreign applicants would all have had sources closer to hand in their own countries.

“I think they just wanted to waste our time,” he says. “They wanted to slow us down.”

It was pure irritation, he says, that provoked him and others to write the notorious emails apparently conspiring to destroy or withhold data. “It was just frustration. I thought the requests were just distractions. It was taking us away from our day jobs. It was written in anger.”

But he insists that no data were destroyed. “We have no data to delete. It comes to us from institutions around the world. We interpret data. We don’t create or collect it. It’s all available from other sources.”

If the leak itself was bad, the aftermath was the stuff of nightmares. Even now, weeks later, Jones seems rigid with shock. “There were death threats,” he says. “People said I should go and kill myself. They said they knew where I lived.” Two more death threats came last week after the deputy information commissioner delivered his verdict, making more work for Norfolk police, who are already investigating the theft of the emails.

The effect on Jones was devastating. The worldwide outcry plunged him into the snakepit of international politics. It was, he agrees, “a David Kelly moment”.

“I did think about it, yes. About suicide. I thought about it several times, but I think I’ve got past that stage now.” With the support of his family, and particularly the love of his five-year-old granddaughter, he began to look forward again. He is still unwell, getting through the day on beta-blockers and the night on sleeping pills, and he has lost a stone in weight. But at last there is optimism.

Until the inquiry is over, he will stand aside from his directorship of the CRU. On the question of the science, however, he remains bristlingly defiant. He may have tripped up over the FoI requests, but nobody has laid a glove on the science. To prove his point, he spreads the table with graphs, tracing the outlines with his fingertip. He shows how the warming trend plotted by the CRU precisely matches the plots from two independent sources in America. “There, you see!” The three coloured lines precisely overlay each other, proof positive of scientific probity.

“I am obviously going to be much more careful about my emails in future. I will write every email as if it is for publication. But I stand 100% behind the science. I did not manipulate or fabricate any data, and I look forward to proving that to the Sir Muir Russell inquiry [the UEA’s independent review into allegations against the unit].”

Then, he believes, at the age of 57 he will be ready to resume his career and get on quietly and invisibly with what he does best. His hope for the future? “I wish people would read my scientific papers rather than my emails.”

“Good planets are hard to come by” – a note from Andrew Glickson

Dr Andrew Glick is an earth and paleoclimate scientist from the Australian National University.

“We’re simply talking about the very life support system of this planet.”  (Joachim Schellnhuber, Director, Potsdam Climate Impacts Institute, advisor to the German government).

The release of more than 320 billion tons of carbon (GtC) from buried early biospheres, adding more than one half of the original carbon inventory of the atmosphere (~590 GtC) to the atmosphere-ocean system, has triggered a fundamental shift in the state of the atmosphere at a rate of 2 ppm CO2/year, a pace unprecedented in the geological record with the exception of the effects of CO2 released from craters excavated by large asteroid impacts.

Recent paleoclimate studies, using multiple proxies (soil carbonate δ13C, boron/calcium, stomata leaf pores), indicate that the current CO2 level of 388 ppm and CO2-equivalent level of 460 ppm (which includes the methane factor), commits warming above pre-industrial levels to 3 to 4 degrees C in the tropics and 10 degrees C in polar regions [1], leading to an ice-free Earth.

Such conditions existed in the early Pliocene (5.2 Ma) and mid-Pliocene (2.8 Ma) Pliocene, about the time Australopithecine bipeds were emerging from tropical forests [2]. Pliocene climates changed gradually and pre-historic humans responded through migration. There is nowhere the 6.5 billion of contemporary humans can go, not even the barren planets into the study of which space agencies have been pouring more funding than governments allocated for environmental mitigation to date [3].

It appears difficult to explain to the public and politicians that, at 460 ppm CO2-equivalent, the climate is tracking close to the upper stability limit of the Antarctic ice sheet, defined at approximately 500 ppm [4]. Once transcended, mitigation measures would hardly be able to re-form the cryosphere, which serves as the Earth’s thermostat, from which cold ocean and wind current emanate – keeping lower latitudes cool. Once the ice melts the atmosphere-ocean system shifts to greenhouse Earth conditions such as existed about 15 Ma (mid-Miocene), before 40 Ma (Eocene), and much of the Cretaceous (141 – 65 Ma), when only small burrowing mammals could live on land.

About 2.8 Ma, the mid-Pliocene, temperatures rose by at least 3 degrees C above pre-industrial and sea levels rose by 25+/-12 meters [5]. About 15 million years ago the rise of CO2 to near~500 ppm resulted in global temperatures about 4 degrees C above pre-industrial level and sea level by about 40 meters. Since the early 20th century the rate of sea level rise increased from about 1 mm/year to about 3.5 mm/year [6] (1993 – 2009 mean rate 3.2+/-0.4 mm/year (Figure 1).

Figure 1: Sea level changes 1993 – 2009 scanned by the Topex and Jason satellites. University of Colorado, 2009 (http://sealevel.colorado.edu/)

The world is in a lag period, when the consequences of human greenhouse gas emissions and land clearing are increasingly manifest, including atmospheric energy levels which drive hurricanes and is shifting climate zones toward the poles, with consequent desertification of temperate zones, i.e. southern Europe, southern Australia, southern Africa. The desiccated forests become prey to firestorms, such as in Victoria and California.

Global warming is modulated by the ENSO cycle, including relatively cool La-Nina phases (Figure 2). Studiously ignorant climate change deniers, who would like to call themselves “sceptics”, use these cycles to claim “global cooling” [7]. In contravention of basic laws of thermodynamics (Stefan-Boltzmann law, Kirchoff law) which underlie the infrared absorption/emission resonance effect of greenhouse molecules, they invoke the role of short-lived (9 days average atmospheric residence) water vapour but neglect the long-term effects (centuries to millennia) of the well-mixed CO2 and nitric oxides. The increased frequency of the El-Nino is tracking toward conditions of permanent El-Nino, free from the effects of polar-derived currents (Humboldt Current, California Current). Such conditions existed about 2.8 Ma ago [8] (Figure 3).

Figure 2: Mean global temperature trend 1975 – 2009 and the ENSO cycle, representing the superposition of the El-Nino – La Nina cycles on the global warming trend."

Climate change is appropriately described as a global oxygenation event affecting geological carbon deposits as well as the present biosphere. At 2 ppm/year the scale of carbon oxidation exceeds the highest recorded geological rate of 0.4 ppm/year, recorded at the Paleocene-Eocene boundary at 55 Ma when about 2000 GtC were burnt, triggering an extinction of species [4].

Figure 3: Evolution of the ENSO (El Nino Southern Oscillation) cycles from the Pliocene (5.2 – 1.8 million years ago) to the present, showing the divergence of ocean temperatures in the east Pacific Ocean (blue line) from the west Pacific Ocean (red line).

Hopes for a meaningful binding agreement in Copenhagen, described as “the most important meeting in the history of the human species.” (Joachim Schellnhuber), and for a supposed presidential “Messiah” to wave the magic wand, collapsed in December, 2009, in the sorry mess of vested and tribal interests.

The international system required to protect the lives of the young and future generation is failing. According to the Global Carbon Project “Carbon emissions from the combustion of fossil fuels and land use changes reached almost 10 billion tonnes in 2007” [9]. Those who deny the reality of climate change around the globe seek uncertainties in future climate projections, cf. dates of Himalayan glacier melt or Amazon deforestation. This ignores the evidence for dangerous climate trajectories even where the precise dates of future events can not be determined, namely, Himalayan glaciers melt may precede or postdate 2035. Presumably the claims of “conspiracy” on the part of the scientific world include the pioneers of atmospheric physics (Joseph Fourier, John Tyndall, Svante Arrhenius and Guy Chalendar), as well as those who defined the basic thermodynamic laws of the greenhouse process (Stefan, Bolzmann, Kirschner)?

Most of all those who criticise the IPCC ignore the fact that, to date, the IPCC reports have UNDERESTIMATED ice melt rates, sea level rise, feedback effects and the proximity of tipping points, not least the looming release of hundreds of GtC as methane from permafrost, lake sediments and bogs.

Governments continue to pour the planet’s dwindling resources into wars (US$1.4 trillion in 2008) and bank bailouts (US$0.7 trillion).  Entertainment and media are projected to cost US$2 trillion in 2011. Between 1958 and 2009 the US (NASA) spent US$823 billion on space exploration searching among other for water and microbes on other planets [10]. Now they have found water on Mars and the Moon, while pH of the terrestrial oceans has declined between 1751 and 1994 by 0.075 (8.179 to 8.104) [11], threatening the marine food chain.

  1. Pagani M. et al. 2010.   http://www.nature.com/ngeo/journal/v3/n1/abs/ngeo724.html
  2. deMenocal P.B. 1995. http://www.sciencemag.org/cgi/content/abstract/270/5233/53
  3. http://en.wikipedia.org/wiki/NASA Budget#Annual _budget.2C_1958-2008;
  4. Zachos J.C. et al. 2008 http://www.nature.com/nature/journal/v451/n7176/full/nature06588.html
  5. Haywood M. and Williams M. 2005. http://www3.interscience.wiley.com/journal/118652116/abstract?CRETRY=1&SRETRY=0
  6. Rahmstorf S. 2007. http://www.sciencemag.org/cgi/content/abstract/1135456 http://sealevel.colorado.edu/
  7. Easterling D.R. and Wehner M.F. 2009. http://www.agu.org/pubs/crossref/2009/2009GL037810.shtml
  8. http://www.sciencemag.org/cgi/content/abstract/sci;312/5779/1485
  9. http://www.abc.net.au/news/stories/2008/09/26/2374776.htm
  10. http://features.csmonitor.com/innovation/2009/09/24/nasa-finds-water-ice-in-mars-craters/ http://features.csmonitor.com/innovation/2009/09/24/new-evidence-of-water-on-the-moon/
  11. http://en.wikipedia.org/wiki/Ocean_acidification


Another Great Barrier Reef wipeout by The Australian

The Australian newspaper ran with a typical sensationalist headline this morning, titled “Report undercuts Kevin Rudd’s Great Barrier Reef wipeout“. The journalist in question might sound familiar – he is the same same journalist who penned the deliberately misleading “How the reef became blue again” article (see here for our response at Climate Shifts: “Why the Great Barrier Reef isn’t magically blue again“). So continues The Australian’s ongoing war against science, creating contention and deliberately clouding issues to sell newspapers. “Report undercuts Kevin Rudd’s Great Barrier Reef wipeout” – sorry Jamie, there is no undercutting here.

KEVIN Rudd’s insistence that the Great Barrier Reef could be “destroyed beyond recognition” by global warming grates with new science suggesting it will again escape temperature-related coral bleaching.

One of the main issues in the article is that there is no ‘new science’ to be reported. Hugh and his team at the Australian Institute of Marine Science have been surveying these reefs annually since the early 1990’s. The ‘spin’ here is completely misleading, as there is no ‘new science’ or even a report to base the article on! The article continues:

Going head-to-head with Tony Abbott for the first time since he became Opposition Leader, Mr Rudd said the reef would be destroyed if global temperatures increased by 4C.

“I noticed the other day, by the way, that the Leader of the Opposition said that, if the worst-case scenario put out by scientists on the Intergovernmental Panel on Climate Change were to come to pass and we were to see global temperature increases of the order of 4 degrees centigrade, it did not represent any big moral challenge for the future,” Mr Rudd said. “Can I say that, if we saw temperature increases like that, as far as the Barrier Reef is concerned, frankly, it would be destroyed beyond recognition.”

Mr Rudd’s warning reflects the findings of the 2007 report of the IPCC that is under intensifying fire for exaggerating the threat to Himalayan glaciers and the Amazon rainforest. The IPCC predicted the reef would be subject to annual bleaching by 2030 if climate change continued unchecked, destroying much of its coral cover.

But after scouring 14 sites at the vulnerable southern end of the GBR last month, the team from Townsville-based AIMS found only a only a handful of “slightly stressed reefs”.

It seems to me that Kevin Rudd has managed to hit the nail squarely on the head, only for The Australian to then get it completely wrong. It appears that the article has managed to mix up the AIMS projections for this summers coral bleaching outlook with the long-term projections of coral bleaching in the region (30-50 year outlook). The ‘handful’ of slightly stressed reefs doesn’t negate the findings of the IPCC or Rudd’s claims that the reef will be destroyed if global temperatures increased by 4C. As Hugh rightly points out,

Dr Sweatman said a deep monsoonal trough, reinforced by tropical cyclones Olga and Neville, had averted “doldrums” conditions associated with coral bleaching on the reef.

Which is exactly what happened in 2006. As I mentioned in a previous blog post, the GBR region experienced its eighth warmest year on record in 2009, and the warming trend is unmistakable.

Finally, the article strives to convince the general public that as scientists, we “fear” that mass bleaching events will become more frequent due to global warming, and our ‘fears’ have been substantially allayed. Although it makes for great sensational journalism, this simply isn’t the issue – this isn’t a “fear” but a scientific fact. Next time, let’s stick to fact over fearmongering and keep the science objective.

Coral Sea experiences eighth warmest year on record in 2009

Australia’s National Climate Centre (which is housed by the Bureau of Meteorology) undertakes real-time analysis of sea surface temperature around Australia.  This is an important task in terms of assessing the risk faced from climate change by our fisheries and assets such as the Great Barrier Reef.

The latest analysis of the Coral Sea region is of significant interest.  The warming trend is unmistakable and is statistically significant. And it turns out that 2009 was the eighth warmest year on record for this region.  Experts at the National Climate Centre have also suggested that 2010 is likely to be a near-record temperature based on the evolution of the current El Niño event.

With every increase in sea surface temperature, critical organisms such as reef-building corals are pushed closer to the threshold at which they undergo mass coral bleaching and mortality. This is essentially an issue of increasing risk.  With projections of future sea temperatures that are 2 or even 4°C above today, it is incredibly hard to argue that iconic and economically important assets like the Great Barrier Reef are not in the deep trouble.

More on the IPCC and the younger dryas event

Dennis Jensen replied to OveHG
Sun 31 Jan 10 (12:50pm)
Ove, your comparison with flight is particularly apropo. Around the turn of the 20th century Samuel Langley, a scientist supported by the Smithsonian was seen to be the most likely to fly first. Unfortunately, the scientist did not apply scientific method and his “aerodrome” crashed unceremoniously into the Potomac. Then you had the Wright Brothers, non-scientists who you IPCC lot would say “not qualified” and attack for lack of credentials, who actually used scientific method, developed the wind tunnel, and actually took measurements and accepted the data, and did not reject data that was not convenient. Sounds awfully like the AGW argument today.

I remember your briefing to our environment committee where you went on about the Barrier Reef being in danger due to high CO2 levels. When I pointed out that corals lived in periods where the CO2 concentration was more than 10 times current levels, you then said the rate of temperature change was the issue of major concern. I recall stating that the rate was over 20 times more at the end of the Younger Dryas only 12 000 years ago, and that you had no answer for it. I was struck with both you and Will Steffen appearing to “situate the appreciation, rather than appreciate the situation”.

Doesn’t the avalanche of bad research referenced by the IPCC, lack of peer review and clear collusion and corruption in the process not concern you at all?

My reply:

Dennis Jensen – you have a selective a curious recollection of the briefing.  When you asked about corals living at CO2 concentration was more than 10 times current levels – we said two things.  The first is that calcified reefs disappear from the fossil record when CO2 is high (See Veron 2008 and references therein – Mass extinctions and ocean acidification: biological constraints on geological dilemmas. Coral Reefs 27:459-472.  J E N Veron was the chief scientist at the Australian Institute of Marine Sciences).  The second is that I indicated that the rate of change was a major issue – with CO2 as well as temperature.  Current rates of change are 100 to 1,000 times higher than the average rate of the last 720,000 years.  This leaves biology in the dust (ie evolution takes time and we are exceeding it).

My comments on the Younger Dryas Event were as follows:  (1) the Paleoclimate people tell us that there was a sudden change in temperature of about 5°C (2) based on the evidence from today, it was properly a catastrophic yet short lived event from which ecosystems and early human societies probably bounced back from (after 100 years or so), and (3) the precision of the paleoecology record is too blunt to see any impact.  That is, any ecological event (mass mortality etc) that lasts for a period shorter than 500 years generally cannot be seen within the fossil record.  So we will never know what happened etc.

In response to your comment about the Intergovernmental Panel on Climate Change.  You have to ask yourself as a politician, do I trust the Australian scientific community or not.  There is no alternative. If you take Ian Plimer’s unreviewed book, you will find huge errors … and Monckton, Carter, and Lehr are largely unpublished and have long track records of misinformation and deceit.  Clearly, not sources of information that I would use to base policy on.  On the other side, you have hundreds of Australian scientists with the best qualifications lined up along with our most prestigious scientific institution, the Australian Academy of Sciences.  And thousands upon thousands of peer review papers in reputable Australian and international journals.  The question I had to ask you as a budding politician is as follows.  If you are not planning to take the advice of the hundreds of Australia’s scientists (and our Academy of Sciences and CSIRO), who will you be taking your advice from on matters of agriculture, health and engineering sciences?  And how would you handle the universities, given you have implied that most of the people employed by them are corrupt and dishonest?
A government that rejects its entire scientific community (99%) would be a very poor government indeed!

Much ado about nothing.

The consistent attempts by a well organised and well funded denialist movement have recently focused on the sources of information used by the Intergovernmental Panel on Climate Change. Through an transparent set of guidelines to how to deal with literature (the next set of guidelines are about to be published in preparation for AR5), the IPCC has referenced the thousands of scientific papers to gain the latest consensus view on climate and related sciences.  This stands in contrast to the lack of scrutiny, credibility or honesty of the principal champions of denialist viewpoint.  In that case, when one looks at Carter, Bolt, Minchin, Lehr, Joyce, Monckton and Plimer, we see a series of individuals pushing crazy ideas about scientific conspiracy and a Communist world takeover.

Several denialists have focused on a report that came out of a research contract that I undertook for the international conservation group, Greenpeace (click here to download the report).  This relatively short report brought together a number of experts to examine how changes to the health of coral reefs as result of coral bleaching might affect coastal people in 13 Pacific countries. It was written by a series of experts with years of experience, high credibility and tons of peer reviewed publications in the area.  Peer review of the report involved be following appropriate Pacific experts:

·         Dr Mahendra Reddy, Lecturer in Development Studies, University of the South Pacific, Suva.
·         Mr Lionel Gibson, Geography Department, University of the South Pacific, Suva.
·         Mr Joeli Veitayaki, Coordinator, Marine Affairs Programme University of the South Pacific, Suva.

Two individuals (one from Greenpeace) read the report for consistency and to ensure we had fulfilled the contract.

Our report was referenced by the Intergovernmental Panel on Climate Change in chapter 4 of the Working Group II report for the fourth assessment.  While Greenpeace was the contracting organisation, they had no influence over the analysis or conclusions.  And just like any other organisations that I undertake expert contracts with (which includes partnerships with Rio Tinto, the Australian government, and many others) the analysis and conclusions are those of the research team, and those alone.   Given that the report had been independently peer-reviewed, then it would be appropriate to the IPCC to use it, if it contains useful information.

So, once again it seems we have yet another case of desperation from the denialist movement – cherry picking around the edges and ignoring the hundreds if not thousands lines of evidence that support the notion that our climate is changing and the impacts are likely to be considerable and vast.

More on “What would eat a spiny sea urchin?”

Update:  just got two new comments on this:

John,
Saw your post on coral list.  Toadfishes at San Blas also eat Diadema with little pre-processing of the meal.  The burrows of Sanopus barbatus on the reef can be localized by the long spines littering their ‘porch.’  Amphichthys cryptocentrus at San Blas are also known to eat Diadema but are also more of a generalist feeder (in an old Ross Robertson paper).
BTW, I recently saw an aggregation of ~500 Diadema spawn on Turneffe Atoll in Belize.
Cheers,
John


John Barimo, PhD
Field Coordinator and Coral Reef Biologist
Blackbird Oceanic Research Center
P.O. Box 207
Belize City, Belize
Telephone: +501 22 04256
email: bzoceanic@gmail.com
Blog: http://oceanicsocietyfieldstationbelize.blogspot.com/

Adjunct Professor
Peninsula College
1502 E. Lauridsen Blvd.
Port Angeles, WA 98362
email: JohnB@pcadmin.ctc.edu

Hi John:

I’d like to add to your list crabs which eat Diadema by chopping down their spines with their pincers as they move in for the kill, and all the small wrasses that attack small Diadema.  Back in the old days when you couldn’t turn over a piece of rubble without uncovering dozens of small Diadema, the juvenile wrasses and parrots (under 15 cm) would follow you around and pick them to pieces.  Back in early 2000s, Margaret Miller and I tried outplanting of juvenile hatchery raised Diadema in the 1-2 cm diameter and in one case, most of them were eaten within 30 minutes even though we tucked them into crevices.  There’s a reason they have all those big spines.  They have “food” written on a big sign on their foreheads.

Alina

**********************************************
Dr. Alina M. Szmant
Professor of Marine Biology
Coral Reef Research Program, Center for Marine Science
University of North Carolina Wilmington
5600 Marvin K. Moss Lane
Wilmington NC 28409
Tel:  (910)962-2362; fax: (910)962-2410;  cell:  (910)200-3913
http://people.uncw.edu/szmanta

Since making a post on the surprising variety of critters that eat the spiny urchin Diadema, a number of colleagues have sent their observations, videos, references, etc of other Diadema predators.  So I wanted to make a revised list for posterity.   When appropriate, ill include the source of the info.

In no particular order, predators of Diadema include: snapper, jacks, porcupinefishes, trunkfishes, grunts including black margate and white grunt, porgies, triggerfishes, pufferfish, large wrasses, parrotfish, octopuses, lobsters, several large gastropods, e.g., Triton’s trumpet snails and helmet shells (Cassis), small crabs (which eat juvenile Diadema), permit, saucereye porgy, southern stingray, hogfish, sea stars, e.g.,  Culcita and Oreaster, and zebra Moray.

Have we forgotten anyone?

We did some gut content analysis of fish in La Parguera Puerto Rico and
found these fish to have consumed Diadema:

Permit
saucereye porgy
southern stingray
white grunt

Randy Clark (NOAA)

—–

Maybe I missed it but did not see  Hogfish mentioned as a Diadema
predator. I have watched them pick off all the spines one by one and
ten swallow the test in a single gulp. Back when I got through school
spearing Hogfish for restaurants (before the die-offf and when they
were called Hogsnapper) all  larger hogfish we took had at least a
dozen purple spots around the head. After the Diadema die-off hogfish
ceased to have those purple puncture spots. Apparently they switched
to other prey and are doing well.

Gene Shinn
—–

Add the sea star Culcita to the list of possible Indo-Pacific suspects.
Some asteroids are known to eat urchins (Dayton et al., 1977; Rosenthal &
Chess, 1972; Schroeter et al., 1983) and I have witnessed Culcita eating
large numbers of Echinometra (Tonga)and Echinostrephus (Maldives – where it
could be collateral damage). It would not surprise me if they ate smaller
Diadema but I have not seen it in Maldives where I have made most of my
observations and Diadema are generally low density and adult thanks to a
diversity of predators (large Balistids especially).

Bill Allison

Refs
Dayton, P. K., R. J. Rosenthal, et al. (1977). “Population structure and
foraging biology of the predaceous Chilean asteroid Meyenaster gelatinosus
and the escape biology of its prey.” Marine Biology 39: 361-370.

Rosenthal, R. J. and J. R. Chess (1972). “A predator-prey relationship
between the leather star, Dermasterieas imbricata, and the purple urchin,
Strongylocentrotus purpuratus.” Fish. Bull. U.S. 70: 205-216.

Schroeter, S. C., J. Dixon, et al. (1983). “Effects of the Starfish Patiria
miniata on the Distribution of the Sea Urchin Lytechinus anamesus in a
Southern Californian Kelp Forest.” Oecologia 56(2/3): 141-147.

—–

Hi John,

I remember seeing on a few occassions, at night, Triton’s trumpet snails apparently eating urchins, including Diadema. West Indian sea stars, Oreaster, eat them as well.

Lonnie Kaczmarsky

—–

Eight years ago, I filmed a Zebra Moray feeding on a Diadema.  See the low
res version attached to this email.  You can see the Eightline Wrasse and
Saddle Wrasse opportunistically jumping in as well.

Bryce

Bryce Groark
Living Ocean Productions
808.345.4538
www.livingoceanproductions.com

click here to watch Byrce’s awesome video!

—–

Hi John,

I will confirm pufferfishes (porcupine) for D. antillarum (by patiently breaking tips further and further until able to be upturned and eaten) and brutal octopus/triggerfish battle of D. savignyi in Easter Island (dense Diadema populations). The triggerfish split the urchin with a strike from above (and took a few spines in the face (long and not deep), and each would periodically drop their half to fish over the other half. An amazing battle.

Eric Borneman
Dept. of Biology and Biochemistry
University of Houston

I also wanted to highlight the comments made by Alastair Harborne regarding my mention of his new paper and appologize for the long delay in responding to and acknowledging his clarification.  I just moved (temporarily) from North America to Brisbane, Oz, with three kids, two surfboards and one wife.  The last few weeks have been a tad busy.  I spent at least a few days deciphering Aussie cell phone plans.  (I finally have a plan, an unlocked iphone and a number, but no idea how long it will last or when/how I am meant to “top up”.)

Hi there,

I wanted to add to this thread because my paper was cited at the start as an example of how there is a common misconception that Diadema only have a few predators. Within my paper I draw heavily on the Randall paper that lists the range of fishes that predate on urchins, and also discuss the effects of invertebrate predators in the Discussion. Indeed I use Randall’s data (on the percentage of fish of each species that contained urchins spines within their stomachs) to weight the biomass of predators inside and outside the marine reserve in order to reflect the fact that some species feed more heavily on Diadema than others. I think the Randall data are interesting because in only 6 species did more than 20% of individuals contain urchin spines (at a time when urchins were much more abundant than they are now). This suggests a hypothesis that while a range of species may feed on Diadema, potentially only a few species feed on them at a sufficient rate to regulate their populations. There is also an interesting question of the number of species that can feed on urchins of different sizes – I suspect that most of the species listed by Randall can take juvenile urchins, but perhaps only a subset can feed on large adults.

The comment about the few specialist predators in my paper (which incidentally, as the rest of the paragraph shows, was not a statement by me but a cited statement from Pinnegar et al, 2000) was a reflection on the potentially different effect of Caribbean marine reserves on urchins compared to in the Indian Ocean. In the Indian Ocean, Tim McClanahan and others have demonstrated that reserves can increase the abundance of urchin predators, and reduce damaging urchin plagues. Obviously urchin plagues have not been an issue in the Caribbean since the mass mortality in the 1980s, although the Sammarco data from Jamaica suggest that this may have been a problem before that time (at least in some habitats). The issue in the Caribbean is rebuilding Diadema abundances while simultaneously trying to rebuild fish communities that include urchin predators. Urchin population dynamics are complex, poorly understood, and influenced by a range of variables, but it seems likely that the abundance of a few key predators (few possibly being relative compared to the number of predators of, say, a larval fish recruiting to a reef) may be an important top-down control of Diadema densities.

Cheers,
Alastair

Pinnegar JK, Polunin NVC, Francour P, Badalamenti F, Chemello R,
Harmelin-Vivien ML, Hereu B, Milazzo M, Zabala M, D’Anna
G, Pipitone C (2000) Trophic cascades in benthic marine
ecosystems: lessons for fisheries and protected-area management.
Environ Conserv 27:179–200

Why the Great Barrier Reef isn’t in “bloody brilliant shape” (Part 2)

More on the Great Barrier Reef and how it isn’t in “bloody brilliant shape” – despite what Andrew Bolt might claim to the contrary. Ignoring the science and facts, Bolt instead relies on a single anecdotal observation from a spearfisherman to support his case:

Veteran diver Ben Cropp said that in 50 years he’d seen no heat damage to the reef at all. “The only change I’ve seen has been the result of over-fishing, pollution, too many tourists or people dropping anchors on the reef,” he said.

Here’s a challenge for you Andrew – show me the science that says otherwise.

Histograms illustrating the proportion of reefs (y axis) and percent coral cover (x axis) on the Great Barrier Reef (h) 1980-1983, (i) 2000-2003

Coral cover on the Great Barrier Reef (the world’s most extensive protected coral reef) is no higher than other regions such as the Phillipines (in general poorly managed and at high risk).

Cover (means ± 1 SE) in ten subregions of the Indo-Pacific. Values above the bars are the number of reefs surveyed in each subregion.

Source: Bruno JF, Selig ER (2007) Regional Decline of Coral Cover in the Indo-Pacific: Timing, Extent, and Subregional Comparisons. PLoS ONE 2(8): e711. doi:10.1371/journal.pone.0000711

Why the Great Barrier Reef isn’t in “bloody brilliant shape” (Part 1)

Time after time I read articles in the news that the Great Barrier Reef is ‘doing fine’, or quoting misguided and baseless information, saying that the GBR is in ”bloody brilliant shape”. Myths like this seem to be endlessly perpetuated, in this case, with absolutely no data to support there claims – why let the fact get in the way of a good story? Sadly, the science is hard to argue against:

Figure 1 Degradation of coral reefs. a, Results of a meta-analysis of the literature, showing a decline in coral cover on the Great Barrier Reef. Each point represents the mean cover of up to 241 reefs sampled in each year. b, The recorded number of reefs on the Great Barrier Reef, Australia, substantially damaged over the past 40 yr by outbreaks of crown-of-thorns starfish (COTS) and episodes of coral bleaching

Figure 1 Degradation of coral reefs. a, Results of a meta-analysis of the literature, showing a decline in coral cover on the Great Barrier Reef. Each point represents the mean cover of up to 241 reefs sampled in each year. b, The recorded number of reefs on the Great Barrier Reef, Australia, substantially damaged over the past 40 yr by outbreaks of crown-of-thorns starfish (COTS) and episodes of coral bleaching

Source: Bellwood et al (2004) Confronting the coral reef crisis. Nature 429 827-833