[Coral-List] Alga densities and bleaching

[Eesat Atikkan]

Though the Fe-growth relationship is an attractive hypothesis, shipwrecks in particular, consist of a range of metals.  Anyone of those, individually or synergistacally, could be a potential growth factor.

In general wrecks tend to appear to support less coral growth.  That may be due to depth, though 'fluorescent orange' stage Monastrea cavernosa colonies do recruit to wrecks in the 70 ft range.


Esat


--- On Mon, 11/26/12, Szmant, Alina <szmanta at uncw.edu> wrote:

> From: Szmant, Alina <szmanta at uncw.edu>
> Subject: Re: [Coral-List] Alga densities and bleaching
> To: "Delbeek, Charles" <CDelbeek at calacademy.org>, "coral-list at coral.aoml.noaa.gov" <coral-list at coral.aoml.noaa.gov>
> Date: Monday, November 26, 2012, 6:44 PM
> FYI, every place I dive where there
> is metal structure (old ship hulls, navigation pilings etc)
> they are covered with nice looking corals of all
> species.  There is a great example in the Dry Tortugas
> where there is an shallow water old wreck (I can't remember
> the name now) near the old Carnegie Station, that has huge
> corals growing on it!  These metal substrates would
> make great coral habitat except for the fact that they
> eventually rust, and the corals slough off.  I think
> the coral larvae like the iron-rich substrates.. 
> Iron-rich volcanic rocks seem to have the same attraction to
> coral larvae.
> 
> *************************************************************************
> Dr. Alina M. Szmant
> Professor of Marine Biology
> Center for Marine Science and Dept of Biology and Marine
> Biology
> University of North Carolina Wilmington
> 5600 Marvin Moss Ln
> Wilmington NC 28409 USA
> tel:  910-962-2362  fax: 910-962-2410  cell:
> 910-200-3913
> http://people.uncw.edu/szmanta
> *******************************************************
> 
> 
> -----Original Message-----
> From: coral-list-bounces at coral.aoml.noaa.gov
> [mailto:coral-list-bounces at coral.aoml.noaa.gov]
> On Behalf Of Delbeek, Charles
> Sent: Sunday, November 25, 2012 4:04 PM
> To: coral-list at coral.aoml.noaa.gov
> Subject: Re: [Coral-List] Alga densities and bleaching
> 
> What are the currents like?
> 
> J. Charles Delbeek, M.Sc.
> Assistant Curator, Steinhart Aquarium
> California Academy of Sciences
> 
> p 415.379.5303
> f. 415.379.5304
> cdelbeek at calacademy.org
> www.calacademy.org
> 
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> 
> -----Original Message-----
> From: coral-list-bounces at coral.aoml.noaa.gov
> [mailto:coral-list-bounces at coral.aoml.noaa.gov]
> On Behalf Of Rudy Bonn
> Sent: Wednesday, November 21, 2012 9:08 AM
> To: coral-list at coral.aoml.noaa.gov
> Subject: [Coral-List] Alga densities and bleaching
> 
> Interesting?  The Key West Marine Park is managed by Reef
> Relief here in Key West.  It is a ~48 acre site on the
> south side of the island and fronts Higgs beach, Dog beach,
> and extends from the duval street pier east to the white
> street pier, (Gene is probably familiar with the area)
> anyway, years ago the county/city put in a new pier at Higgs
> Beach and left portions of the old one behind.  These
> submerged portions of the old pier are made of iron, and
> there are corals attached to this iron substrate in amazing
> numbers and diversity, and they are all in very good health,
> I can send pictures if you contact me by my email, the water
> depth is 12 foot max on a spring tide, so we know that
> during the summer months the temp probably reaches the upper
> 80's  these corals show no signs of disease, alga
> overgrowth, bleaching,  like I said in really good
> health.  Any ideas?  the genera we have found include: 
> montastrea, siderastrea, porites, diploria
>  (several sp) meandrina, oculina, among others, all in good
> health all attached to iron,    ideas?
> 
> Rudy S Bonn
> Director of Marine Projects
> Reef Relief
> 631 Greene Street
> Key West, FL 33040
> 305-294-3100
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