[Coral-List] bleaching and acidification
Tim Wijgerde
t.wijgerde at coralscience.org
Wed Feb 18 14:00:29 EST 2009
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Dear all,
why not put corals in 5 small chambers at pH levels of 7,4;7,6;7,8 and 8.2
and measure calcification. Next, subject the same corals to these values
for 3 months or more and see how they grow. Maybe calcification rates are
more or less equal in all conditions (ample HCO3-) but net accretion
correlates negatively with lower pH levels (decreased arag sat, so more
dissolution). I noticed some gaps about this in the literature. Mix this
with different temperatures in a larger setup and the data would be very
interesting. Maybe combine this with some microsensor measurements to
correlate calicoblastic pH levels with decreased ambient pH (which is
usually around pH 9 during the day at ambient pH 8.2) and we could
distinguish between gross accretion and dissolution. It will probably cost
significantly more ATP (energy) to allow the Ca2+/proton pumps to keep
high calicoblastic fluid pH levels at low ambient pH.
p.s. Dr. Muir, you will
find arag stat maps in this paper for example by Prof. Hoegh-Guldberg;
DOI: 10.1126/science.1152509
Science 318, 1737 (2007);
O.
Hoegh-Guldberg, et al.
best
tim
Op Wo, 18 februari, 2009 18:00, schreef
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> Today's Topics:
>
> 1. Re: bleaching and
acidification (Paul Muir)
> 2. CPCe V3.6 is available (Kevin
Kohler)
> 3. CPCe V3.6 is available (Kevin Kohler)
>
4. Black cyanobacterisponge, Terpios hishinota, outbreak in
>
coral reefs and geographic information needed (Allen Chen)
>
5. post doc position (St?phanie Reynaud (CSM))
>
>
>
----------------------------------------------------------------------
>
> Message: 1
> Date: Tue, 17 Feb 2009 10:05:01
+1000
> From: "Paul Muir"
<paul.muir at qm.qld.gov.au>
> Subject: Re: [Coral-List]
bleaching and acidification
> To: "coral-list
coral-list" <coral-list at coral.aoml.noaa.gov>
>
Message-ID:
>
<BB9E9CCBC5617F4B9FB988E8553C377D238BC1 at mtqfp02.mtq.qm.qld.gov.au>
> Content-Type: text/plain; charset="US-ASCII"
>
>
> Are there maps of aragonite saturation/ carbonate
equilibrium for ocean
> areas? On a trip to the Indian Ocean in
2005 we were quite struck by
> differences in apparent growth
rates of Acroporas after the '98
> bleaching event at different
locations. In the Maldives growth after
> mass mortality was
apparently rapid (ie new colonies 2- 3m diameter)
> while at a
similar latitude in the Seychelles the maximum colony size
> of
Acroporas was approx 25 cm. We did wonder if these apparent
>
differences in growth rates were partly due to differences in aragonite
> saturation since both locations appeared quite similar in terms of
being
> oceanic reefs with minimal human impact.
>
>
> Dr. Paul Muir
> Museum of Tropical
Queensland,
> 78-104 Flinders St,
> Townsville QLD 4810
Australia.
> ph. 07 47 260 642 fax. 07 47 212 093 mob. 0407 117
998
>
> * if no reply or problems sending try
paularwen at gmail.com
>
>
>
>
-----Original Message-----
> From:
coral-list-bounces at coral.aoml.noaa.gov
>
[mailto:coral-list-bounces at coral.aoml.noaa.gov] On Behalf Of Thomas
> Goreau
> Sent: Tuesday, 17 February 2009 3:11 AM
>
To: Chris Langdon
> Cc: coral-list coral-list
> Subject:
[Coral-List] bleaching and acidification
>
> Dear
Chris,
>
> I fully agree with what you say below based on
lab studies. The Elat
> field data of Silverman et al. clearly
showing less net calcium
> carbonate accumulation when waters have
higher pCO2 makes this even
> clearer.
>
>
However this small reduction must be contrasted with the fact that
> bleached corals completely stop growing (Goreau & Macfarlane)
or
> reproducing (Szmant-Froelich) for at least one year, and it
takes a
> couple years to fully recover even if they survive and
high temperatures
> don't ever come back.......
>
> Best wishes,
> Tom
>
> Thomas J. Goreau,
PhD
> President, Global Coral Reef Alliance
> Coordinator,
United Nations Commission on Sustainable Development
> Partnership
in New Technologies for Small Island Developing States
> 37
Pleasant Street, Cambridge MA 02139
> 617-864-4226
>
goreau at bestweb.net
> http://www.globalcoral.org
>
> Date: Sun, 15 Feb 2009 17:49:56 -0500 (EST)
> From:
"Chris Langdon" <clangdon at rsmas.miami.edu>
>
Subject: [Coral-List] Bleaching vs acidification
> To:
coral-list at coral.aoml.noaa.gov
> Message-ID:
>
<2975.129.171.118.2.1234738196.squirrel at webmail.rsmas.miami.edu>
> Content-Type: text/plain;charset=iso-8859-1
>
> It
is very clear that bleaching events have resulted in significant loss
> of live coral cover around the globe. We know that within the
> environmentally probable range of pH that coral mortality does
not
> result.
> However, acidification may play an
important role in the amount of
> recovery that is possible
between bleaching events which have been
> occurring with a
frequency of 3-7 years since 1982. The average
> saturation state
of the tropical ocean has dropped from a pre-industrial
> value
of
> 4.6
> to a present day value of 3.9-4.0. This is
sufficient to have caused on
> average a 17% decrease in
calcification for the twelve or so species
> that have been
studied in the lab. In a world where the balance between
>
production and loss of carbonate on many reefs is thought to be close
> and where the replacement rate of new coral colonies on many reefs
is
> not keeping up with the rate of mortality a 17% reduction in
fitness may
> be significant. While acidification does not kill
corals it does result
> in slower development of coral larvae into
juvenile colonies (Albright
> et al.
> 2008) and slower
development of juvenile colonies to sexual maturity.
> While
bleaching is a very important threat I don't we know enough at
>
this time to ignore the possibility that acidification has already
> played a role in the lack of recovery that we are seeing on many
reefs.
>
>
>
>
>
>
> Chris Langdon
> Assoc. Professor
> RSMAS/MBF
> Uni. of Miami
> 4600 Rickenbacker Cswy
> Miami,FL
33149
> Ph: 305-421-4614
> Fax: 305-421-4239
>
_______________________________________________
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http://coral.aoml.noaa.gov/mailman/listinfo/coral-list
>
>
> ------------------------------
>
>
Message: 2
> Date: Tue, 17 Feb 2009 12:15:02 -0500
> From:
Kevin Kohler <kevin at nova.edu>
> Subject: [Coral-List] CPCe
V3.6 is available
> To: coral-list at coral.aoml.noaa.gov
>
Message-ID: <5.1.0.14.2.20090217121101.014fcb38 at pop.nova.edu>
> Content-Type: text/plain; charset="us-ascii"
>
>
>
> ------------------------------
>
> Message: 3
> Date: Tue, 17 Feb 2009 13:09:35 -0500
> From: Kevin Kohler <kevin at nova.edu>
> Subject:
[Coral-List] CPCe V3.6 is available
> To:
coral-list at coral.aoml.noaa.gov
> Message-ID:
<5.1.0.14.2.20090217130638.01695ba8 at pop.nova.edu>
>
Content-Type: text/plain; charset=us-ascii; format=flowed
>
> Dear Coral Lister,
>
> The National Coral Reef
Institute (NCRI) of Nova Southeastern University
> is
>
pleased to announce the availability of Version 3.6 of CPCe (Coral
Point
> Count with Excel extensions). CPCe is a Windows-based
program that
> provides
> for the determination of coral
cover and diversity using transect
> photographs and the random
point count method. It can also perform image
> calibration and
area analysis.
>
> Improvements in V3.6 include:
>
> Two additional Excel analysis sheets
> Ability
to assemble accumulated lengths in area analysis
> Excel files
have greater Office 2007 compatibility
> File sequencer allows
bulk image renaming
> User option for expanding small images
> Help file is now Vista compatible
> Reference images for
supplied data codes
>
> CPCe is provided by NCRI free of
charge for interested researchers. More
> information is available
at http://www.nova.edu/ocean/cpce/
>
>
>
Kevin
> ----------------------------------------------------
> Kevin E. Kohler <kevin at nova.edu>
> Director of
Computing Services
> National Coral Reef Institute
(www.nova.edu/ncri)
> Nova Southeastern University Oceanographic
Center (www.nova.edu/ocean)
> 8000 North Ocean Drive Dania Beach,
Florida 33004
> Ph: 954.262.3641 Fax: 954.262.4158
>
>
>
> ------------------------------
>
> Message: 4
> Date: Wed, 18 Feb 2009 13:49:30 +0800
> From: Allen Chen <cac at gate.sinica.edu.tw>
> Subject:
[Coral-List] Black cyanobacterisponge, Terpios hishinota,
>
outbreak in coral reefs and geographic information needed
> To:
coral-list coral-list <coral-list at coral.aoml.noaa.gov>
>
Message-ID:
<14093016-B712-4969-9BED-1A3001931161 at gate.sinica.edu.tw>
>
Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
>
> Dear Listers,
>
> I am looking for the
new information, particularly in the Pacific
> Islands and other
Indo-Pacific region, about the outbreak of black
>
cyanobacterisponge, Terpios hishinota. This sponge overgrows hard
> corals and any hard substrate when it goes. Outbreak of Teripos
was
> observed in Guam at early 1970s, and in Okinawa at mid
1980s. Until
> now, some of the coral reef areas are still covered
by black turf-
> like sponge for such long time, according to the
status report in 2004.
>
> In Taiwan, we have observed
the outbreak in the islands at the east
> coast since 2006. for
the preliminary information, please refer to
> this paper.
>
> "The Black Disease of Reef-Building Corals at Green
Island, Taiwan -
> Outbreak of a Cyanobacteriosponge, Terpios
hoshinota (Suberitidae;
> Hadromerida). Zoological Studies 46(4):
520 (http://
> zoolstud.sinica.edu.tw/464.htm)"
>
> We are organising an integrative project to study this sponge
species
> and the mechanism in killing corals. We would like to
get more
> information, particularly those islands or reefs that
Terpios
> hishinota have been observed but not been reported by
the
> documentation. One of the research topic is to figure out
the sexual
> and asexual sources and where does the terpios in
Taiwan come from
> and go using population genetic approaches. So,
any information
> related to this cyanobacterisponge will be
grateful appreciated.
>
> Cheers, Allen
> Allen
Chen, PhD
> Associate Research Fellow
> BRC-AS, TAIWAN
>
>
>
> ------------------------------
>
> Message: 5
> Date: Wed, 18 Feb 2009 16:14:34
+0100
> From: "St?phanie Reynaud (CSM)"
<sreynaud at centrescientifique.mc>
> Subject: [Coral-List]
post doc position
> To: coral-list at coral.aoml.noaa.gov
>
Message-ID:
>
<A681EEFB-7B8F-4FAB-9F67-397552B2DACB at centrescientifique.mc>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed;
delsp=yes
>
> Dear colleagues,
>
> I
would like to draw your attention to a postdoctoral research
>
fellowship opportunity at the Centre Scientifique de Monaco directed
> by Prof. Denis Allemand (CSM; http://www.centrescientifique.mc).
>
> You will join the team of Ecophysiology to study deep
sea corals. The
> candidate will focus his (her) study on growth
rates and nutrition
> under different environmental conditions.
> This study will be made in collaboration with Covadonga Orejas and
the
> team of the CSIC in Barcelona.
>
>
Selection criteria include:
> * A PhD in relevant disciplines,
> * An excellent publication record for stage of career,
> *
the knowledge of coral/deep coral biology or food web interactions and
> * Capacity to bring fresh approaches to this study that will
> complement existing areas of strength in the Scientific Centre.
>
> The position will be available in June 2009. Appointment
will be
> through May-June 2010 in the first instance.
Applications will be
> accepted until end of fMarch 2009.
>
> Enquiries to:
> Dr. C. Pag?s
(ferrier at centrescientifique.mc) or Prof. Denis Allemand
>
(allemand at centrescientifique.mc
> )
>
> To apply,
please forward a CV, email addresses of 3 potential
> referees,
and a 1-2 pages description of a research project.
>
>
>
>
>
>
------------------------------
>
>
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> End of Coral-List Digest, Vol 6, Issue 20
>
*****************************************
>
Tim
Wijgerde, M.Sc.
CEO Coral Publications
www.coralscience.org
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