Biorock brings corals back in Ambon

The corals of Ambon, in the Moluccas of Eastern Indonesia, were made famous by some of the greatest Natural Historians who ever lived.
 
In the 1600s Georg Eberhard Rumpf, better known as Rumphius, described hundreds of new species of Ambonese plants and marine animals, including corals, even though he could not see them because he was completely blind and described them by feeling the specimens with his hands. 
 
 
 
In the 1800s Alfred Russel Wallace, co-discoverer of the Laws of Evolution, was spellbound by the stunning variety of shapes and colors of corals completely covering the bottom of Ambon Bay.  
 
 
Even though he never could see them except looking over the side of a boat into the crystal clear waters, Wallace realized from that glimpse that there was as fantastic a world in the reefs as he found in the jungles, and longed to be able to dive like a fish and see them as close up as the birds, mammals, and insects he studied. And so had Charles Darwin. 
 
Portrait of Charles Darwin
 
That only happened when Prof. Thomas F. Goreau became the first diving marine scientist in the 1940s. 
 
Ambon was for centuries a major center of the spice trade. Greatly increased populations cut down the jungles along the shore. Mud, and later, sewage and plastic, polluted the bay and killed almost all the corals (D. Ontosari, P. T. Karissa, M. Tjatur, H. Lating, R. Sudharna, K. Astika, I. M. Gunaksa, & T. Goreau, 2015, Geotourism combining geo-biodiversity and sustainable development of tropical Holocene coral reef ecosystems: Comparison of two Indonesia eco-regions using Biorock technology, Proceedings Joint Convention Balikpapan HAGI-IAGI-IAFMI-IATMI).
 
Biorock Indonesia, the Maluku Fisheries Department, local fishermen, and students from Universitas Pattimura have been growing Biorock coral reefs in the muddy waters inside Ambon Bay that amazed Rumphius and Wallace back when the waters were transparent. 
 
This project, started by Komang Astika, Prawita Tasya Karissa, and Ruselan Sudharna, managed by Sandhi Raditya, and sponsored by Pertamina, has already stimulated settlement of new branching Acropora corals that had nearly vanished (see photos below). 
 
Here on Ambon nearly 30 years ago Muslims and Christians were killing each other, goaded by outside religious fanatics. Now in this place there are Biorock coral reefs shaped like a church and a mosque, side by side, to emphasize that the environment affects every single one of us, whether we realize it or not, and that we must all work together to regenerate it for the sake of future generations.
 
More Biorock reefs will be installed in the next few days.
 
Rumphius and Wallace would be delighted!
 
BIOROCK AMBON, November 18 2018, photos by Komang Astika and Sandhi Raditya
Acropora, Merulina, and Pocillipora

 

Euphyllia ancora
Acropora
Acropora
Acropora

 

Acropora

Coral growth after one month on new Cozumel Biorock reefs

These photos, taken by Torcuato Pulido Mantas in early July 2018, show typical examples of very healthy coral growth after just one month on new Biorock reefs in Cozumel, Mexico. The corals shown were naturally damaged and were rescued from dying when transplanted onto the Biorock reefs a month before. Around half the coral species now being grown are shown in these photos.

The growth and settlement of corals on the Biorock projects and control sites is now being studied by Torcuato Pulido Mantas, with the advice of Dr. German Mendez of the Cozumel Coral Reef Restoration Program and Dr. Tom Goreau of the Global Coral Reef Alliance.

The coral species shown below are: 1) Eusmillia fastigiata, 2) Porites astreoides, 3) Orbicella (Montastrea) annularis, 4) Agaricia agaricites, 5) Porites porites (front) with Agaricia tenuifolia (top), 6) Diploria labyrinthiformis, and 7) Meandrina meandrites.

More photos and video from these projects will be posted later as the project progresses.


Biorock Oyster, Salt Marsh, and Sea Grass Restoration for Coastal Protection, Fisheries Habitat Regeneration, Submerged Breakwaters, and Artificial Islands

Thomas J. F. Goreau, PhD
President, Global Coral Reef Alliance

INTRODUCTION

Biorock technology, first invented in 1976 in Grand Isle, Louisiana by the late Wolf Hilbertz, architecture professor at the University of Texas at Austin (Hilbertz, 1979; Goreau & Hilbertz 2005), provides the highest settlement, growth, survival, and resistance to extreme environmental stresses such as temperature, mud, and pollution for all marine organisms investigated (Goreau, 2014), including corals, oysters, salt marsh grass, and seagrass, the very ecosystem builders whose loss has caused massive global coastal erosion. The method is completely safe and uses very little power. Biorock materials, which can be grown in any size or shape, are up to 3 or more times harder than concrete, and are the only marine construction materials that grow stronger with age and are self-repairing if physically damaged (Goreau 2012). Biorock technology saves whole coral reefs when they would die from extreme high temperature bleaching. Biorock methods have grown thriving oyster, salt marsh, and sea grass ecosystems in places where they had died completely and failed to regenerate naturally (Goreau & Trench, 2012). Biorock reefs have grown back severely eroded beaches naturally in just months (Goreau & Prong, 2017). It is therefore the most powerful tool for restoring essential but vanishing marine ecosystem services including protection of the coast from erosion, maintenance of biodiversity, and restoration of essential juvenile fish habitat. It is also the most cost-effective marine regeneration method, providing vastly superior results at much lower cost than the methods that have been used previously. This GCRA White Paper outlines the results of previous relevant work (apart from coral reefs which have been discussed elsewhere), and suggests specific applications to restore rapidly retreating coastal ecosystems.

PREVIOUS WORK: OYSTERS

The first Biorock projects, done at Grand Isle, Louisiana, aimed to produce building materials via seawater electrolysis, by precipitating hard limestone minerals from sea water on top of steel frames. The steel was entirely protected from corrosion and hard white minerals grew over it. The first projects were powered by photovoltaic panels, and when Wolf Hilbertz came back three months later the limestone was completely overgrown with adult sized oysters that had spontaneously settled and grown all over it (Hilbertz, 1979). Oyster covered material from Louisiana is the Biorock in the upper left of the image below.

Figure 1. Spontaneously oyster covered Biorock material after three months growth in Louisiana (upper left) contrasted with Biorock material grown in the Maldives. Photo by Wolf Hilbertz.

A wire mesh basket, 9 inches across, was wired up for growth of materials, a few months later it was packed completely full with oysters that had spontaneously settled and grown (Goreau, 2012). The basket was then taken out of the water, and sat outdoors for around 25 years exposed to rain in a backyard in British Columbia. When it was removed from the ocean there was no rust visible and the metal was shiny, all the rusting in the photo took place in this period of exposure on land.

Figure 2. Oysters that spontaneously settled in a metal basket and grew to adult size in months. Grand Isle, Louisiana. Photo by Eric Vanderzee.

Similar intense spontaneous settlement of mussels was observed in an experiment in the Straits of Georgia, British Columbia (Goreau, 2012). The photo below shows a mesh wired up to a trickle charge in the center, on with a smaller charge on the left, and one with no charge on the right.

Figure 3. Spontaneous mussel settlement on steel mesh with very low (left), low (center), and zero trickle charge. Photo by Eric Vanderzee.

In a Superfund toxic waste site in New York City harbor where all the oysters had died from pollution, oysters (Crassostrea virginica) were grown with low, very low, and zero Biorock charges. The Biorock charges greatly increased growth rates over the entire growing season. Note that only length figures were measured, Biorock oysters also grew wider and thicker, so their volume increase was hundreds of times higher than controls (Shorr et al., 2012).

Figure 4. Growth in length of oysters with various trickle charges at a Superfund site in New York City over a summer growing season. Figure from Shorr et al., 2012.

At the same site oysters were measured over the winter dormant season. Biorock oysters continued to grow all winter long, without a dormant season, their shells were shiny and bright, and there was no mortality. Ninety-three per cent of control oysters died over the winter, and the surviving oyster shells had shrunk in size. The shells were chalky and crumbling, dissolving from high CO2 and acidity in water at freezing temperatures (Shorr et al., 2012).

Figure 5. Growth in length of oysters with various trickle charges at a Superfund site in New York City over a winter dormant season. Figure from Shorr et al., 2012.

Similar results of higher growth rate and survival of the Eastern Oyster with Biorock electrical currents were found in flow through tank experiments in downtown Manhattan (Berger et al., 2012), and other sites. Only Atlantic Oyster results are summarized here, but we have also found greatly accelerated settlement, growth, and survival of many species of wild tropical oysters on Biorock projects around the world, including mangrove oysters, coral reef oysters, and pearl oysters, as well as Giant Clams.

PREVIOUS WORK: SALT MARSH

Salt Marsh Grass, Spartina alterniflora, was restored at a Superfund toxic waste site in New York City where it had been killed by pollution a century before. Salt marsh grass growth in the mid intertidal under low, very low, and zero trickle charge from a solar panel was measured. The growth rate, as measured by clump height, was proportional to electrical charge (Cervino et al., 2012). The electrically charged grass was also observed to have more plants per clump and darker green leaves as well as greater height when compared to controls, but biomass measurements were not made as they required sacrificing the grass.

Figure 6. Growth rate of Salt Marsh Grass under zero, very low, and low trickle charge. Solar panel charging project is seen in the background (Photograph by James Cervino).

Salt marsh grass was also planted with and without solar trickle charge in the low intertidal, lower than the lower limit of the seagrass naturally in the area. Salt marsh grass growth is limited in the low intertidal because they are mostly submerged, getting little light in the muddy water, and are more exposed to storm wave erosion than plants higher up. All controls died at the end of the year. Biorock salt marsh grass in this hostile site has grown vigorously, sprung up anew every spring with more plants, which have increased more than 20-fold over 10 years (Cervino et al., 2012).

Figure 7. Biorock Salt Marsh Grass growing vigorously below the local lower limit for this plant. (Photograph by Tom Goreau)

Most salt marsh planting projects fail because plants are washed away by waves before the roots can grow. These results show that with Biorock, root growth, and underground plant runner spreading is greatly accelerated, so salt marshes can be extended seawards in places where they are now retreating inland due to the erosion caused by global sea level rise and intensified storm waves caused by global warming (Goreau, 2012).

PREVIOUS WORK: SEAGRASS

Seagrasses are being devastated worldwide by dredging and increased turbidity and pollution in coastal waters. Seagrasses (Posidonia oceanica) were grown in southern Italy with and without trickle charge from a solar panel. The wire mesh used for both was attached to hard bare limestone rock bottom. The Biorock seagrass grew vigorously, with the roots rapidly attaching to the rock bottom, and large numbers of mussels, clams, oysters, shrimps, crabs, and fish settled in the sea grass habitat. The controls all died (Vaccarella & Goreau, 2012). What is most astonishing about these results is that the sea grass was grown on bare rock, where it is normally impossible for seagrass to grow, as growth of roots requires about 5-10 centimeters of sandy or muddy sediment.

Figure 8. Excellent growth of seagrass on Biorock over three months in the Mediterranean. All control seagrass died. Photograph by Raffaele Vaccarella.

Figure 9. Dense root growth of seagrass on Biorock in the Mediterranean, colonized by a wide variety of invertebrates and fishes. Photograph by Raffaele Vaccarella.

Caribbean seagrasses, Thalassia testudinum and Syringodium filiforme, were observed to grow much taller under and next to Biorock projects in the Bahamas and Panama. Many species of Indo Pacific seagrasses were observed to do the same in Indonesia.

Figure 10. Vigorous sea grass growth around a Biorock project in Sulawesi, Indonesia. Photograph by Paulus Prong.

Most seagrass, salt marsh, and mangrove planting projects fail because the plants are washed away by waves before the roots can grow. These results show that with Biorock, marine plant root growth and underground spread is greatly accelerated, so that sea grass can be grown even on bare rock. Restoring mangroves as well as sea grasses, salt marsh grasses, and coral and oyster reefs will provide the strongest natural shore protection against erosion from global climate change, and the most cost-effective carbon sinks.

PREVIOUS WORK: BEACH RESTORATION

Biorock coral reefs grown in front of severely eroding beaches with erosion cliffs, where the sand was mostly gone, trees were falling into the sea, and buildings being moved inland before they could collapse, grew back the beach sand naturally at record rates in just months, increasing beach height up to 1.5-2 meters, beach width by up to 20 meters, and beach length up to 150 meters. Rapid regeneration of severely eroded beaches was first done in the Maldives (Goreau and Hilbertz, 2005), Lombok, Indonesia (Goreau et al., 2012), and Sulawesi, Indonesia (Goreau & Prong, 2017). Concave eroding beaches became convex and growing in a few months, and have continued to steadily grow even under heavy wave and current conditions that should erode them. Biorock reefs cause sand growth by dissipating wave energy through refraction and diffraction without the reflection that causes scour and erosion, by driving wave fronts out of coherence, and by greatly increasing production of sand by calcareous algae and other organisms. Corals, beach sand-producing algae, seagrass, and all forms of reef life are attracted and grow rapidly.

Figure 11. Before: severely eroding Maldives beach. Photograph by Wolf Hilbertz

Figure 12. After, 15 meters (50 feet) of rapid new beach growth behind Biorock reef, in front of a building that had been about to collapse into the sea. Photograph by Azeez Hakeem.

Figure 13. Before, December 2015, Pulau Gangga, Sulawesi, Indonesia beach largely gone, erosion cliff, trees collapsing into the ocean and building about to fall into the sea. Photograph by Paulus Prong.

Figure 14. After, rapid growth of new beach in front of same collapsed tree and cabana that had been about to fall into the ocean. Most of this growth took place in just 3 months. Photograph by Paulus Prong.

PREVIOUS WORK: HURRICANE SURVIVAL

Biorock reefs, if properly designed, have proven to withstand the most severe hurricane. The Biorock reefs cement themselves to hard ground, and cement sediment around their bases. Biorock reefs in Grand Turk, the Turks and Caicos Islands, withstood direct hits by the two worst hurricanes in their history, which occurred three days apart, and damaged or destroyed around 90% of the buildings. There was little damage to Biorock structures or thousands of corals growing on them, although electrical cables were sandblasted and ripped out. Sand accumulated under them, while at the same time concrete artificial reefs nearby caused so much scour around and under them that they sank beneath the surface (Wells et al, 2010).

Figure 15a. Biorock reef just before the two worst hurricanes in Grand Turk history.

Figure 15b. Biorock reef in Grand Turk shortly after the two worst hurricanes in their history. Sand built up under the structures while sand was scoured around the cement blocks in the center, and half of the blocks were washed away by the waves, while there was no damage to Biorock structure or corals. The structures were not welded, only hand wired together, nor were they attached to the bottom except through their own cementation. Photographs by Fernando Perez.

Biorock reefs in Saint Barthelemy withstood the eye wall waves of Category 5 Hurricane Irma without any damage to structure, corals, or the electrical cable. This site, about 2-3 feet deep on top of the reef crest, had waves at least 30 feet high breaking directly on it, and all the houses and hotels on the beach behind the reef were destroyed: http://www.globalcoral.org/biorock-electric-coral-reefs-survive-severe-hurricanes-little-no-damage/.

PROPOSED PROJECTS

Biorock is ideal to grow:

Coral reefs in the subtidal
Seagrass in the subtidal
Salt marshes, in the intertidal
Oyster reefs in the intertidal
Offshore subtidal or intertidal Biorock porous shore protection reefs and fish habitat to grow back beaches
Offshore artificial islands above high tide
Floating reefs for open ocean fisheries

Specific designs require on-site assessment of many physical, chemical, biological, geological, oceanographic, meteorological, and infrastructural parameters to design for the specific needs and problems of each site.

Please contact info@globalcoral.org for more information on how Biorock is the most-cost effective solution to a vast range of marine resource management problems.

The Global Coral Reef Alliance is a non-profit environmental research organization that works with local partners around the globe to assess and reverse the causes killing their reefs.

REFERENCES

N. Berger, M. Haseltine, J. T. Boehm, & T. J. Goreau, 2012, Increased oyster growth and survival using Biorock Technology, in T. J. Goreau & R. K. Trench (Editors), Innovative Technologies for Marine Ecosystem Restoration, CRC Press

J. Cervino, D. Gjoza, C. Lin, R. Weeks, & T. J. Goreau, 2012, Electrical fields increase salt marsh survival and growth and speed restoration in adverse conditions, in T. J. Goreau & R. K. Trench (Editors), Innovative Technologies for Marine Ecosystem Restoration, CRC Press

T. J. Goreau, 2012, Marine electrolysis for building materials and environmental restoration, p. 273-290 in Electrolysis, J. Kleperis & V. Linkov (Eds.), InTech Publishing, Rijeka, Croatia

T. J. Goreau, 2012, Marine ecosystem electrotherapy: practice and theory, in T. J. Goreau & R. K. Trench (Editors), Innovative Technologies for Marine Ecosystem Restoration, CRC Press

T. J. Goreau, 2014, Electrical stimulation greatly increases settlement, growth, survival, and stress resistance of marine organisms, Natural Resources, 5:527-537
http://dx.doi.org/10.4236/nr.2014.510048

T. J. Goreau & W. Hilbertz, 2005, Marine ecosystem restoration: costs and benefits for coral reefs, WORLD RESOURCE REVIEW, 17: 375-409

T. J. Goreau & R. K. Trench (Editors), 2012, Innovative Technologies for Marine Ecosystem Restoration, CRC Press

T. J. Goreau, W. Hilbertz, A. Azeez A. Hakeem, T. Sarkisian, F. Gutzeit, & A. Spenhoff, 2012, Restoring reefs to grow back beaches and protect coasts from erosion and global sea level rise, in T. J. Goreau & R. K. Trench (Editors), Innovative Technologies for Marine Ecosystem Restoration, CRC Press

T. J. F. Goreau & P. Prong, 2017, Biorock reefs grow back severely eroded beaches in months, Journal of Marine Science and Engineering, Special Issue on Coastal Sea Levels, Impacts, and Adaptation, J. Mar. Sci. Eng., 5(4), 48; doi:10.3390/jmse5040048

W. Hilbertz, 1979, Electrodeposition of minerals in sea water: Experiments and Applications, IEEE Journal on Ocean Engineering, OE4: 1-19

J. Shorr, J. Cervino. C. Lin, R. Weeks, & T. J. Goreau, 2012, Electrical stimulation increases oyster growth and survival in restoration projects, in T. J. Goreau & R. K. Trench (Editors), Innovative Technologies for Marine Ecosystem Restoration, CRC Press

R. Vaccarella & T. J. Goreau, 2012, Restoration of seagrass mats (Posidonia oceanica) with electrical stimulation, in T. J. Goreau & R. K. Trench (Editors), Innovative Technologies for Marine Ecosystem Restoration, CRC Press

L. Wells, F. Perez, M. Hibbert, L. Clervaux, J. Johnson, & T. Goreau, 2010, Effect of severe hurricanes on Biorock coral reef restoration projects in Grand Turk, Turks and Caicos Islands, Revista Biologia Tropical, 58: 141-149


Biorock Technology: A Novel Tool for Large-Scale Whole-Ecosystem Sustainable Mariculture using Direct Biophysical Stimulation of Marine Organism’s Biochemical Energy Metabolism

2018 International Summit on Fisheries & Aquaculture

Biorock Technology: A Novel Tool for Large-Scale Whole-Ecosystem Sustainable Mariculture using Direct Biophysical Stimulation of Marine Organism’s Biochemical Energy Metabolism

Biorock mariculture technology is a novel application of marine electrolysis, which grows solid limestone reefs of any size or shape in seawater, that get stronger with age and are self-repairing. Biorock reefs can be designed to provide habitat specific to needs of hard and soft corals, sponges, seagrass, fishes, lobsters, oysters, giant clams, sea cucumbers, mussels, and other marine organisms of economic value, or grow back severly eroded beaches at record rates. Biorock reefs, and surronding areas, have greatly increased settlement, growth rate, survival, and resistance to severe environmental stress from high temperatures, sedimentation, and pollution for all marine organisms observed. This allows marine ecosystems to survive otherwise lethal conditions and be regenerated at record rates even in places with no natural recovery. These remarkable findings seem to result from weak electrical fields poising the membrane voltage gradients all forms of life use to generate biochemical energy (ATP and NADP), causing enhanced growth of all species. Biorock technology provides a new paradigm for whole-ecosystem sustainable mariculture that generates its own food supplies, the antithesis of conventional mono-species mariculture dependent on external food inputs, whose wastes cause eutrophication that kills off surrounding subsistence fisheries. Potential applications include fish, crustacean, and bivalve mariculture, algae mariculture, pharmaceutical producing species, and floating reefs for pelagic fishes. The power requirements are small and can be provided by solar, wind, ocean current, and wave energy. The techniques are ideally suited for community—managed mariculture, if investment funding were available to subsistence fishing communities.

Biography

Thomas J.F Goreau was educated in Jamaican schools and hold degrees  from MIT, Caltech, and Harvard. President and founder of The Global Coral Reef Alliance, he has dived on coral reefs across the Caribbean, Pacific, Indian Ocean, and SouthEast Asia for more than 60 years. He has published more than 150 papers and written and edited books on scientific photography, marine ecosystem restoration, and soil fertility restoration. He is co-inventor of the HotSpot method for predicting coral bleaching from satellite data and of the Biorock method for regenerating marine ecoystems and eroding coastlines.


Agung Prana – In Memoriam

 

The Global Coral Reef Alliance is deeply saddened to report the loss of our great friend and leading Balinese partner, Agung Prana.

Bapak Agung Prana’s constant support for Biorock projects over 20 years made Bali the world center of coral reef regeneration.

The photo below shows a photo of Agung Prana held by his son, Bagus Mantra, surrounded by the leaders of the Biorock Bali team.

https://baliexpress.jawapos.com/baliexpress/read/2018/07/07/86403/pionirpariwisata-dan-pelestari-terumbu-karang-berpulang

(translated by Sandhi Raditya)

I Gusti Agung Prana, age 70, passed away Friday, July 6th, 2018 at the Wing International Sanglah Hospital Bali, after a long illness of cancer. Mr. Agung Prana, our beloved father was born July 12th, 1948 in Mengwi, Bali. He is survived by his wife, I Gusti Ayu Arini, one daughter, I Gusti Agung Desi Pertiwi, and two sons, I Gusti Bagus Mantra and I Gusti Ngurah Kertiasa.

He was a dedicated man who served his life for Bali Tourism since the late 60s. He has had a chance as Vice President of Bali Tourism Board and Chairman of the Association of Indonesia Travel Agencies (Bali Chapter). His last 3 decades was devoted to sustainable eco-tourism in Pemuteran, North Bali restoring degraded marine ecosystems through biorock reefs method. He was a founder of Karang Lestari Foundation and worked together with the spirit and culture of the local people, changing poor areas into a high visited tourist destination. This brought Pemuteran gained many international and national awards such as Tourism for Tomorrow Awards – Finalist (2018), The Equator Prize of UNDP (2017), Best Sustainable Tourism Development of Indonesia Tourism Ministry (2012), Tri Hita Karana Award (2011), PATA Gold Award (2005), and Best Underwater Ecotourism Project of SKAL International (2002).

On behalf of family members, Mr. Bagus Mantra apologized for all the mistakes of his father. He conveyed that funeral services (Plebon ceremony) will be conducted on Saturday, July 21st, 2018 at the Jero Gede Bakungan, Umabian, Peken Blayu Marga, Tabanan Regency. Friends may call at the funeral home Saturday morning from 7 to 9 a.m. or one hour prior to the services.

More details to follow.


Spectacular Biorock coral growth videos

 

Spectacular coral growth on Biorock is seen in the three videos linked below.

Pemuteran, Bali

This video shows Biorock reef growth in Pemuteran, Bali at a site that had been almost barren of corals and fishes when the Biorock projects began 15 years earlier.

Gili Trawangan, Indonesia

This video shows the installation of a new Biorock reef in Gili Trawangan, Indonesia, and the growth of corals on it one year later:

Curaçao

This video shows phenomenal growth of staghorn corals in Curaçao shown by time lapse photos:

To see Biorock results for longer time scales (11 years) please look at: https://www.youtube.com/watch?v=Rx8TV9Kd0ns


Biorock electrical fields inhibit shark biting

Article by Diana Crow published on April 5th 2018 in the Sierra Club magazine
Original article @ sierraclub.org.

Electric Shark Boogaloo

Is there such a thing as an electric fence, but for sharks?

PHOTO BY ISTOCK | WHITCOMB RD

BY DIANA CROW | APR 5 2018

Marine biologist Marcella Pomárico Uchôa stood at the edge of a small boat in the Bimini region in the Bahamas, watching a floating piece of white PVC pipe, rigged with wires and a bag of minced meat, bob up and down with the waves. It wasn’t long before the sharks arrived.

The sharks weren’t shy about their interest in the minced meat. They charged toward it at full-speed, only to swerve away at the last moment. In contrast, the Bermuda chubs and bar jacks swam right up to the rig and grabbed a snack without hesitation. Something was changing the sharks’ behavior.

The two species Uchôa’s study focused on—bull sharks (Carcharhinus leucas) and Caribbean reef sharks (Carcharhinus perezi)—can sense electric fields in the water. Their electrosensory organs—called the ampullae of lorenzini—are sensitive enough to detect the electric activity in their prey’s nervous systems, allowing sharks to lunge at their prey blind.

As Uchôa and her colleagues reported in the journal Animal Biology last year, the wire and PVC rig emitted a low voltage electric current that seemed to befuddle the two species of shark. Ordinary fish—without an electromagnetic sixth sense—didn’t seem to notice the electricity at all.

As far as the observers on the boat could tell, the sharks weren’t hurt by the electric field. “Sharks just avoid them because it’s confusing,” explains the study’s co-author Thomas Goreau of the Global Coral Reef Alliance, an organization that restores coral reefs by building artificial electric reefs.

This confusion could open up new markets for Goreau’s coral reef restoration business. Back in 1987, Goureau was writing coastal zone management plans for hotels and fisheries in Jamaica when he met an architect and inventor named Wolf Hilbertz. Hilbertz had been developing construction materials for underwater buildings when he found that electrically charged metal attracts dissolved minerals in seawater. Over time, these minerals build up, forming a material similar to concrete–or to the calcium carbonate of coral reefs.

The two began designing synthetic electric reefs—which they called “Biorocks”—meant to slow coastal erosion and provide habitat for coral reef species in areas that had seen massive coral reef damage. About 400 were installed in over a dozen countries including off the coast of Panama, the Saya de Malha bank near the island nation of Seychelles, and Gili Trawangan in Indonesia. Most are close to shorelines and draw from the nearby islands’ power grids, but Goreau and his colleagues have been experimenting with using renewable power sources such as solar panels and wave power generation.

In thirty years, Goreau had never seen a predatory shark hanging out near a Biorock reef. Then, while giving a talk at the University of the Basque Country in Spain, he met Uchôa, who was a marine science grad student at the time. The two began looking into whether Goreau’s experience could be backed up by real-world experiments, and whether Biorocks could function sort of like underwater electric fences, steering sharks away from popular diving areas.

Shark bait experiment in progress. Photo courtesy of Marcella Pomárico Uchôa.

Using sharks’ electromagnetic sense to direct shark traffic away from humans isn’t a new idea. Several electricity-emitting “shark-repelling”products–most of them wearable or attachable to surf boards—are already on the market. Whether these electromagnetic shark deterrents actually work is another question. “It depends on what you mean by working,” says marine biologist Charlie Huveneers of Flinders University in Australia. “If you’re asking whether they would stop or protect people all of the time in 100% of situations, then no, they don’t work. If you’re asking whether they have an effect on the behavior of sharks, then yes, they do work.”

Shark deterrent field tests by academic marine biologists—who are independent of the deterrent-making companies—have found that those effects can vary quite a bit. Sometimes, the sharks seem to hesitate in the presence of an electric field but go in for the kill anyway. Sometimes, they don’t go for the bait but stay within a few meters of the boat. The effects differ between species, and a few people have even been bitten while wearing electromagnetic shark “deterrents”.

Ideally, says says shark biologist Ryan Kempster of the University of Western Australia, the electrical field produced by a shark deterrent should be tailored specifically to the size and species of the shark in question, because every species detects and responds differently to electric fields of varying strengths and frequencies.

“The problem with shark deterrents,” adds says Huveneers, “is that there’s no real regulation in terms of what the deterrents need to be able to do to be called ‘deterrent’. And manufacturers can make a lot of claims about the device that they’re selling without ensuring the veracity of those claims,”

If Biorocks work to keep sharks away from beaches that are popular with divers, such a scenario could be beneficial to sharks, since they are more likely to be hurt or killed by humans than the other way around. But Goreau freely admits that more research is needed. The PVC pipe rig in Uchôa’s experiment emitted an electric field very similar to that of a Biorock reef but not identical. In the majority of the experiments, sharks didn’t swerve from the PVC pipe rig until they were just a few feet away from the reef, which could mean that Biorock placement would have to be strategic to prevent sharks from swimming through areas that the field doesn’t reach to.

Goreau admits that it’s possible that no one has seen large predatory sharks swimming around Biorock reefs simply because there are so few large sharks left worldwide. Rays and nurse sharks, which can also sense electricity, live on and near Biorocks and do not appear to be affected by the Biorocks’ electric fields. It is possible, though, that the electrical field could have some effect on the behavior of sharks, rays, and skates that is not readily apparent. That alone is reason to be cautious, according to Uchôa.

In the meantime, Goreau remains excited. Students monitoring the Biorock reefs in Indonesia have noticed large numbers of young fish swimming around the artificial reefs. Because sharks, rays, and skates are the only fish known to have electrosense, this raises the question of what is bringing them there. “We do get enormous recruitment of larval fish when the power is on, much more so than when the power is off,” says Goreau. “There’s an enormous need to expand this work.”


Restoring Coral Reefs Is Possible and Surprisingly Fast

Written By Dr. Mercola
Origianl posting on www.mercola.com

Coral reefs make up less than one-quarter of 1 percent of the Earth’s surface,1 yet supply resources worth an estimated $375 billion annually, according to the International Union for Conservation of Nature (IUCN).2 More than 500 million people around the world depend on coral reefs for protection from storms, food, jobs and recreation, and they provide a home to more than 25 percent of fish species and 800 hard coral species.

As for their importance to their surrounding ecosystems, it is immense, and the sheer diversity of species that depend on coral reefs for spawning, breeding and feeding is equally impressive. There are 34 recognized animal phyla, for instance, and 32 of them are found on coral reefs (even rain forests count only nine different phyla among their midst).3

Sometimes referred to as “rain forests of the sea,” it’s estimated that coral reefs may support up to 2 million different species and act as essential nurseries for one-quarter of fish species.

Coral reefs also serve as carbon sinks, helping to absorb carbon dioxide from the environment, and represent an irreplaceable source of protection for coastal cities. Their importance as a food source is also considerable, as healthy coral reefs can provide about 15 tons of fish and other seafood per square kilometer (.38 square mile) per year.4

Unfortunately, corals are in severe decline. According to conservation organization World Wildlife Fund (WWF), two-thirds of coral reefs worldwide are under serious threat and another one-quarter are considered damaged beyond repair.5 There may, however, be hope, even for damaged reefs, as new technology offers a chance for reefs to regrow at a surprisingly fast pace.

Biorock Technology Restores Coral Reefs

In 2000, it was stated at the International Coral Reef Symposium that about 94 percent of Indonesia’s coral reefs were severely damaged. This included Pemuteran Bay, where the once-thriving coral reef was largely barren. Biorock technology proved to be the answer, restoring the reef in just over a decade:

“Pemuteran formerly had the richest reef fisheries in Bali. The large sheltered bay was surrounded by reefs teeming with fish. The natural population increase was greatly augmented by migration of fishermen from Java and Madura, where inshore fisheries had been wiped out by destructive over-exploitation.

Destructive methods, like use of bombs and cyanide followed their use in other islands, and steadily spread until most of the reefs had been destroyed. The offshore bank reefs that had been dense thickets of coral packed with swarms of fishes, were turned into piles of broken rubble, nearly barren of fish.”6

The Karang Lesteri Project, highlighted in the video above, began in June 2000, when the first “coral nursery” was built at the site. Ultimately, 70 Biorock coral reef structures of different sizes and shapes were planted in the area, restoring the area’s diversity and ecosystem. Formerly known as Seament and Seacrete, Biorock was developed by the late professor Wolf Hilbertz and scientist Thomas Goreau, president of the nonprofit organization the Global Coral Reef Alliance (GCRA).

Projects are now being operated in Indonesia, Bali, Jamaica, the Republic of Maldives, Papua New Guinea, Seychelles, Phuket, Thailand and elsewhere. The technology starts with metal structures that are planted into the reef. Transplanted fragments of live coral (that have been damaged by storms, anchors or other mishaps) are attached and the structure is fed low-voltage electricity to accelerate the growth process. GCRA explains:7

“The Biorock® process … is a new method that uses low voltage direct current electricity to grow solid limestone rock structures in the sea and accelerate the growth of corals providing homes for reef fish and protecting the shoreline. The electrical current causes minerals that are naturally dissolved in seawater to precipitate and adhere to a metal structure. The result is a composite of limestone and brucite with mechanical strength similar to concrete.

Derived from seawater, this material is similar to the composition of natural coral reefs and tropical sand beaches … This patented process increases the growth rate of corals well above normal, giving them extra energy that allows them to survive in conditions that would otherwise kill them. At the same time these structures attract huge numbers of fish, and also provide breakwaters that get stronger with age.”

GCRA states that Biorock reefs grow at a rate of 1 to several centimeters of new rock per year, which is about three to five times faster than normal. While artificial reefs, which are sometimes made by sinking ships, planes, cars, concrete or other man-made materials, will sometimes attract fish and sponges that settle on their surface, the Biorock reefs ultimately turn into true, living coral reefs, courtesy of the growth of limestone. According to GCRA:8

“Coral larvae, which are millimeter-sized freely-swimming baby corals, will only settle and grow on clean limestone rock. This is why conventional artificial reefs made of tires or concrete rarely exhibit hard coral growth. But, when these coral larvae find a limestone surface, they attach themselves and start to grow skeletons. Mineral accretion is exactly what they are searching for. As a result, there are very high rates of natural coral settlement on Biorock structures.”

Is Biorock Sustainable, and Does It Withstand Hurricanes?

Funding to take Biorock to the next level is limited, with most projects so far acting as pilot projects to demonstrate how the process works. And some coral reef experts, such as Rod Salm, senior adviser emeritus with the Nature Conservancy, have suggested the process is too cost prohibitive to work on a large scale.9 Others have pointed out that its dependence on electricity could also be problematic environmentally, although some of the structures are powered via solar panels.

Further, GCRA evaluated damage to the structures in the Caribbean after hurricanes Hanna, Ike and Irma and found them to be remarkably unfazed. While even large shipwrecks in South Florida were damaged or moved during hurricane Andrew, for instance, the Biorocks’ open frameworks allowed water to flow through the structures, sparing them the brunt of the damage.

“For growing corals, we make open frameworks, so the corals can benefit from the water flow through the structure, just as they do in coral reef,” GCRA notes. “As a result of their low cross section to waves, they dissipate energy by surface friction as waves pass through them, refracting and diffracting waves rather than reflecting them. Their low drag coefficient means that they survive waves that would move or rip apart a solid object of the same size.”10

In research published in the journal Revista de Biologia Tropical by Goreau and colleagues, it’s noted that artificial reefs are often discouraged in shallow waters because of concerns that they could damage surrounding habitat during storms. However, in the case of the Biorock restorations, “the waves passed straight through with little damage,” and the researchers said the “high coral survival and low structural damage” after hurricanes suggests the process is effective even in areas that may be hit by storms.11

Another study by Goreau, published in the Journal of Marine Science and Engineering, suggests Biorock electric reefs are able to grow back severely eroded beaches in just a few months. The study noted:12

“Biorock reefs stimulate settlement, growth, survival, and resistance to the environmental stress of all forms of marine life, restoring coral reefs, sea grasses, biological sand production, and fisheries habitat. Biorock reefs can grow back eroded beaches and islands faster than the rate of sea level rise, and are the most cost-effective method of shore protection and adaptation to global sea level rise for low lying islands and coasts”

What’s Causing Coral Reefs to Die?

Coral reefs are facing numerous threats, including rising water temperatures that lead to coral bleaching, in which coral reject symbiotic algae, turn white, and are at increased risk of dying. Overfishing, which disrupts the ecological balance in the reef, as well as destructive fishing practices, such as the use of cyanide, dynamite, bottom trawling or muro-ami (which involves the use of nets and banging the reef with sticks), are also threats, WWF notes.13

Reefs are also harmed by tourism via boating, anchor drops and people diving, snorkeling around and touching the reefs (or collecting coral), as well as construction, mining and logging, which send excess sediment into rivers and the ocean, where it blocks precious sunlight from reaching the coral reefs. There’s even a live rock trade, in which coral is mined for building materials or to sell as souvenirs, with no regard for the destruction it causes to the planet.14

Pollution is another major threat, including that from industrial farm runoff, which is fueling the growth of marine algae blooms, which alter the food chain and deplete oxygen, leading to sometimes-massive dead zones. Even the sunscreen chemical oxybenzone is known to kill off coral reefs. It’s estimated that between 6,000 and 14,000 tons of sunscreen enter coral reef areas worldwide every year.

Much of this sunscreen contains oxybenzone, which research found to be damaging at minute levels — just 62 parts per trillion, or the equivalent of one drop of water in 6.5 Olympic-sized swimming pools.15 Aside from entering the water on swimmers, oxybenzone gets washed down the drain when you shower, entering sewage systems. Once in the environment, as a study published in the Archives of Environmental Contamination and Toxicology revealed, there are four key ways oxybenzone is damaging coral reefs:16

  • Exacerbates coral bleaching
  • Damages coral DNA, making them unable to reproduce and triggering widespread declines in coral populations
  • Acts as an endocrine disrupter, causing baby coral to encase themselves in their own skeletons and die
  • Causes gross deformities in coral, such as coral mouths that expand five times larger than normal

Other Techniques Restoring Coral Reefs

Numerous innovative programs are underway with the goal of restoring the world’s coral reefs. The Coral Restoration Foundation is using a program called the coral tree nursery, which is based on the fact that coral are able to grow and reproduce via fragmentation. That is, if a piece breaks off, it can reattach and grow again, forming a new colony.

Their program involves PVC “trees” that are tethered to the ocean floor. Coral fragments are then hung from the “branches.” The fragments come from their coral nurseries, where coral are nursed for up to nine months until they’re read to be attached to the tree. They’ve already produced tens of thousands of corals in their South Florida nurseries.17

In addition, the organization is working to create “healthy thickets of genetically diverse coral that can sexually reproduce and encourage natural recovery.” An estimated 22,000 corals have been “outplanted” in the Florida Keys, in part by volunteer divers, for this purpose.18

Other experts have suggested that releasing natural viruses, known as phages — short for bacteriophage — onto coral with bacterial disease could essentially wipe out the disease, saving the coral.19 Of course, prevention is even better than a cure, and this means taking steps to curb coral declines in the first place.

Changes to industrial agriculture that limit chemical runoff and help sequester carbon into the soil could have meaningful benefits to coral reefs. It’s estimated that one-third of the surplus carbon dioxide in the atmosphere stems from poor land-management processes that contribute to the loss of carbon, as carbon dioxide, from farmlands. This, in turn, contributes to ocean acidification that harms coral, according to Defenders of Wildlife.

“Seawater absorbs some of the excess CO2 from the atmosphere, causing the oceans to become more acidic. As a result, the oceans’ acidity has increased by 25 percent over the past 200 years. These acidic conditions dissolve coral skeletons, which make up the structure of the reef, and make it more difficult for corals to grow.”20

So, in addition to being a responsible swimmer or diver — and not touching or breaking coral — as well as using only natural, reef-friendly sunscreen, support farmers who are using diverse cropping methods, such as planting of cover crops, raising animals on pasture and other methods of regenerative agriculture. This, in addition to the innovative methods like Biorock being used to restore barren reefs, can help protect the ocean’s reefs from further damage.

Sources and References

 


Frankencorals – In Science Magazine

The Frankenword glossary (Science: 359:154, 2018) omits Frankencorals! It covers death-dealing Frankentechnologies that alarm the public, but life-giving electrical technologies are completely excluded. We’re shocked: none of your examples involves electricity like the Global Coral Reef Alliance’s Biorock electrolysis technology, the sine qua non for genuine membership in the Frankenclub!

Despite widespread electrophobia, Biorock’s electrifying results are entirely beneficial: greatly increased settlement, growth, survival, and resistance to stress of all marine organisms examined, plants and animals, mobile or sessile (T. J. Goreau, 2014, Electrical stimulation greatly increases settlement, growth, survival, and stress resistance of marine organisms, Natural Resources, 5:527-537 http://dx.doi.org/10.4236/nr.2014.510048). Instead of convulsions and rigor mortis, Biorock corals uniquely survive severe high temperature bleaching events that kill more than 95% of corals around them, and quickly smile back at us because the low currents used are in the natural range and show no negative effects, except for predatory sharks, which get confused and won’t bite food right in front of them (M. P. Uchoa, C. C. O’Connell, & T. J. Goreau, 2017, The effects of Biorock-associated electric fields on the Caribbean reef shark (Carcharhinus perezi) and the bull shark (Carcharhinus leucas), Animal Biology, DOI 10.1163/15707563-00002531).

Biorock is the only marine material construction material that grows solid self-repairing structures 2-3 times harder than concrete (T. J. Goreau, 2012, Marine electrolysis for building materials and environmental restoration, p. 273-290 in Electrolysis, J. Kleperis & V. Linkov (Eds.), InTech Publishing, Rijeka, Croatia), and regenerates severely eroded beaches at record rates (T. J. F. Goreau & P. Prong, 2017, Biorock reefs grow back severely eroded beaches in months, Journal of Marine Science and Engineering, Special Issue on Coastal Sea Levels, Impacts, and Adaptation, J. Mar. Sci. Eng., 5(4), 48; doi:10.3390/jmse5040048), rapidly grow beach sand from calcareous algae, restore seagrasses and salt marshes under severe stress where all other methods fail, keep whole coral and oyster reef ecosystems alive when they would die, and grow them back at record rates where there is no natural regeneration (T. J. Goreau & R. K. Trench (Editors), 2012, Innovative Technologies for Marine Ecosystem Restoration, CRC Press). Biorock Indonesia and our partners are about to start Biorock mangrove and Nipa palm restoration of illegally deforested Borneo mangroves for orang utan sanctuaries and to sequester atmospheric CO2 as peat in what we expect to be the single most cost-effective carbon sink.

The reason marine life gets a charge from the Biorock method is that we operate in the beneficial range that galvanizes natural biophysical membrane voltage gradients all forms of life use to make biochemical energy, so they don’t need to use up to half their energy pumping protons and electrons backwards to maintain membrane voltage gradients, whose collapse means death (as caused by high voltages and currents). That’s why we call it electro-tickling, the antithesis of electrocuting high voltage currents everybody is monstrously terrified of!

Published in Science Magazine eLetter 359:154 


Managing Ornamental Coral Trade in Indonesia

A Case Study in Bali Province during the last seven years, a thesis dissertation at Xiamen University, Fujian, China by Sandhi Raditya Bejo Maryoto, Biorock Indonesia Maluku Project Officer, covers the rapid expansion of coral exports for the aquarium trade in Indonesia in general, and Bali in particular.

Indonesia plans to end export of wild corals and switch to 100% export of verifiably cultured corals by 2020. With the banning of coral exports by the Philippines, and most recently by Fiji (BBC Article), Indonesia now has a near-complete monopoly on global aquarium coral exports, so now would be a good time for Indonesia to accelerate the phase-out of wild coral exports.

Abstract

The world ornamental coral trade continues to grow as the result of increasing demand for aquarium industries. Indonesia as a major exporter has distributed corals worldwide with the USA as the biggest market, followed by 87 other importing countries. Ditjen KSDAE (Directorate General for Conservation of Natural Resources and Ecosystem) of MoEF (Ministry of Environment and Forestry) and P2O-LIPI (Research Center of Oceanography – The Indonesian Science Institution) was mandated as a management and scientific authority, respectively, in this curio trade management in Indonesia which is highly referred to CITES provisions. The trade entangles numbers of fishermen, middlemen, wholesalers, and coral companies in advance of exportation. As reported by CITES, a total of 25,569,984 corals were traded from Indonesia in 1985 until 2014. More than 49% (12,719,104 pieces) of all corals were exported to the USA in the same period. As the trade directed to be more sustainable, cultured corals grew steadily during the last decade. BKSDA Bali (Conservation and Natural Resources Agency of Bali Province) also reported similar results in regional coral exportation from Bali. There were 9,583,821 pieces of ornamental corals, mostly were cultured corals, traded by coral companies based in Bali during 2010 – 2016, with annual growth rate of 19.06%. It constituted almost 60% of total Indonesia exportation and was carried out by 25 coral companies. Existing management measures e.g. quotas, licensing system, and spatial management through no-take zones have been put into effects despite still requires various improvements. More comprehensive studies and scientific data are therefore essential in decision making process to set out adaptive management strategies and thus ensuring sustainable coral trade.

Managing Ornamental Coral Trade Indonesia – Sandhi