[Coral-List] Measuring bioerosion rate in a marginal coral reef habitat

Dennis Hubbard dennis.hubbard at oberlin.edu
Thu Jul 11 01:12:47 UTC 2019


Generally, your will work best if you use blocks of dead coral that are the
same species as those you are interested in understanding. As you are
aware, artificial substrates are the compromise we have to make to
constrain the timing over which total bioerosion has accumulated (i.e.,
rate). There are some questions about how a block of dead local coral will
be bioeroded relative to adjacent coral surfaces that have died and are
still part of the reef edifice you are modeling. We have just completed a
study that uses samples collected from a long-term monitoring site for
which we can constrain the time of death without resorting to what I have
referred to "limestone on a stick" experiments. However, practicality
demands that, for the most part, we have to accept this unknown.



On Tue, Jul 9, 2019 at 1:19 PM Mohammad Reza Shokri via Coral-List <
coral-list at coral.aoml.noaa.gov> wrote:

> Dear Coral-List members,
> We are launching a Ph.D. research looking at the effect of salinity and
> temperate increase on the bioerosion rates in coral reefs in the northern
> Persian Gulf. In doing so, artificial and natural blocks will be submerged
> over a gradient of salinity and temperature where hypersaline water from
> the desalination plant discharge into the sea. We are planning to use two
> types of natural and artificial blocks including (1) natural blocks by
> segmenting dead massive corals (e.g., Platygyra sp.); and (2) artificial
> blocks made of carbonate calcium.
> But wonder how to make artificial blocks that need to be identical to
> natural blocks in terms of porosity and texture. Can we use crushed dead
> corals that have been blocked by a glue? If yes? What type of glue?
> Wondering if anyone has experience in making such artificial blocks.
> Best regards
> Mohammad
> -------------------------------------------
> Mohammad Reza Shokri
> Assistant Professor
> Marine Ecology and Conservation
> Faculty of Life Sciences and Biotechnology
> Shahid Beheshti University
> Zip Code:1983969411
> Evin, Tehran, I.R. Iran
> Office phone: +98-21-2990 2723
> Office fax: +98-21-2243 1664
> Cell: 0912 409 7464
> Email addresses: <M_Shokri at sbu.ac.ir>
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Dennis Hubbard
Chair, Dept of Geology-Oberlin College Oberlin OH 44074
(440) 775-8346

* "When you get on the wrong train.... every stop is the wrong stop"*
 Benjamin Stein: "*Ludes, A Ballad of the Drug and the Dream*"

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