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Marine Life & Conservation

Marine conservation in the Indian Ocean

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Introduced by Jeff Goodman

Each year more people look for exotic destinations to take their holidays and dive trips and so the human impact on these pristine places takes a terrible toll. Reef destruction, over fishing, uncontrolled development, pollution from human waste… the list is almost endless. So who is ultimately responsible? Local government? Tour operators? Resort companies? Tourists? We all tend to pass the buck while at the same time making as much profit as possible before the golden goose eventually gets choked to death. In the Maldives at least, these issues are starting to be being taken seriously.

The Maldives, called “the flower of the Indies” by Marco polo, is suffering today from new developments and an increased population, including tourism, which together with climate change will synergistically impact on the marine environment.

The Maldives constitutes together with the Laccadives the largest and most extensive chain of atolls on the planet with less than 4% of the territory being dry land, so by joining the two most important forces that drive the country together, conservation and tourism, a long term sustainability of the marine environment can be obtained.

This country is the most imminently threatened by rising seas caused by climate change, so the Maldives has to be prepared for climate change as past emissions will increase global temperatures by up to 0.60º C over the next four decades, so not only must our awareness of climate change increase, so must our need to understand the changes it will bring and our vulnerability to it. Other activities practiced in the Maldives such as coral mining, pollution and unregulated fishing are already impacting on the marine environment, so understanding the effects of temperature increase and ocean acidification is of extreme importance.

A country that is no longer relying on their tuna fishery for survival but depend on resort islands and incoming tourists for their livelihoods have to take care of their environment.

heaven

Speaking about the tourism in Male, Kuoni’s Head of Corporate Responsibility Matthias Leisinger once said that “tourism is like fire; you can cook with it, but it can also burn your house down.” The tourism industry generates about 30% of the country´s GDP. In 1998 a bleaching event caused almost 100 percent of mortality in some areas of the coral reefs and, compared to other countries where management was working really well, their recovery was much better than in the Maldives. “Incidents like this are likely to increase as stock diminishes everywhere” says another representative from the Ministry of Tourism in the Maldives. He also pointed out new challenges arising with the changing market profile of tourism in the country, since the European visitors do form part of taking care of the natural environment. However, “the market is changing, and the new market is constituted of guests that are walking on the reefs, catching and eating crabs….” “Maybe it is about time for the resorts “to take responsibility for the natural environment for the duration for the lease,” a representative from the Marine Research Centre (MRC) said. Adjustment is essential if the different sectors, including tourism, aim to reduce the vulnerability to climate change and limit its negative sides and so optimizing the resources to the local community to cope with these changes.

           The two biggest threats to the Maldives are climate change and waste management.

             Climate change and coral reefs resilience

            ● Coral Reefs in the Maldives

– The Maldives is home to around 60 different coral genera and has the highest coral diversity in the Indian Ocean. Perhaps due to its substratum or erupted lava, the Maldivian reefs appear to be qualitatively different from other shallow reefs in the Indian Ocean in the way that they are composed of branching Acropora in high abundance and diversity. The Maldives also have the highest temperatures of the Indian Ocean.

– The threats the coral reefs are facing in the Maldives are sedimentation and sewage stress from the bigger islands (from the harbors and airport). In addition to this, inappropriate fishing methodologies are increasing and impact the recovery rate of the reef from bleaching events, and together with the global climate change is the biggest threat nowadays. The impact and the long-term possible recovery of reefs are directly related to overall health of coral reefs.

–  For local and national managers to be able to act in response to these threats it is therefore of extreme importance to have monitoring protocols.

Monitoring Protocols

A number of protocols have been developed by the Marine Research Center, the Darwin Initiative, and the Great Barrier Marine Park Authority to monitor reef fisheries and coral bleaching in which corals expel the algal cells (zooxanthellae), that under normal conditions live within their tissue. The Maldives has already experienced extensive climate related damage to their reefs, where other reefs recovered better under similar circumstances, therefore an accurate management and understanding of Coral Reef health has to be implemented around the whole country.

Bleach Watch

This protocol has been developed to detect and measure conditions and events of coral bleaching from a wide range of users like dive operators and resort staff, who over time can prepare available, reliable reports. Detecting early signs of mass bleaching events require a wide network of observers over a broad span of territory.

CPC

Counting the coral coverage and the coral diversity across the Maldives over time will provide the national government and resort managers with valuable information which can be used to understand and act in response to observed changes and threats to coral reef around the Maldives.

Reef Fisheries and the Darwin Reef Fish Project  

It is important for the Maldives to obtain more knowledge about reef and fisheries in order to develop new management plans to maintain the Coral Reef’s health. The reef fish are important through herb ivory and predation and both overfishing and destructive fishing practices can alter the dynamics of the whole ecosystem. The Darwin Reef Fish Initiative together with the MRC have developed a new resources management plan, where spawning aggregations and fish home range can be detected to elaborate new management plans. The aquarium and bait fishery have guidelines, but there are no regulations for reef fish, apart from the protected Napoleon wrasse and parrotfish species. The reef fishery has to be managed properly to be sustainable and size limitations of reef fish are necessary, so by implementing this monitoring protocol, miss-reporting and under-reporting fish, like the Rainbow runner, is being sampled and measured to apply appropriate managing guidelines and so improve the resilience of the Coral Reefs.

Fish watch

A fish count and underwater visual census; it constitutes a tool to measure fish populations over time and location.

Fish Catch

A survey collecting information on number and weight of landed reef fish. Together with the measured size and the location of fishing, this gives information for developing marine protected areas. Data is also collected from night fishing practiced by guests of the resorts.

Shark Watch

A diver or snorkel-based recording of shark sightings at the dive or snorkel site on a daily basis. Since the sharks were almost depleted from its water or overfished due to their fins, the tourists are now demanding to see sharks, so since 2009 they have introduced shark protection.

Under the climate change trust fund with World Bank funding a new project is being  implemented that will train and empower local community to monitor their coral reefs until September 2014.

A monitoring protocol is developing and a database is going to take shape for the entire country. With less than one per cent of the world’s oceans protected from exploitation and an estimation of that up to 80% of the world´s marine protected areas are only so called and not actively managed, it´s of urgent need to create properly managed and protected areas for the marine environment. All benefits of having marine protected areas are well known, such as conservation of the biodiversity and improvements of the local economy; however, it is so important for the future of the country, which is why a stakeholder approach is needed to monitor these areas and, if necessary, protect and preserve them.

Another issue to consider is how close they need to be, in order to promote connectivity between areas, and how many there should be, to provide a real protection for species. To enhance the resilience of the coral reef in the Maldives not only a reduction on pollution is needed, but also protection and managing existing marine areas properly, can work as an insurance for sustainability.

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            ● Developing waste management systems on inhabited islands

–  The Maldives is facing one very big human impact and that is waste management. In the shadow of Thilafushi Island, which is the waste island close to Male the capital, the local islands are struggling with waste processing and associated water quality problems. The Maldivian islands are scattered over a very large area, so distance combined with an increase in population and consumption make the waste management issue very important to resolve.

– A pioneer project involving four northern atolls cooperating to manage the waste at just one island is set up to start working in 2014. This will join resort islands and local islands together, and act as a pioneer project to relieve the burden of Thilafushi.

–  By promoting this and taking care of waste closer to the islands where it originated, it is probable that less waste will be dumped in the ocean or buried in the sand or burned producing toxic gases.

–  So by doing this, not only will the local islands’ reefs get more resilient by alleviating the human impact, but also the resort island will have less waste washed up on their beaches. This is a good example of both locals and tourists benefitting and eventually the entire economy and the environment.

– Money from separate sources will also be implemented in several projects to teach segregation of waste at household level, and bins will be provided to store the waste separately until removal from the island.

–  Probably due to the fact that the islands have accumulated waste over time, a big clean up has to be organized to accomplish the objective of waste management.

The Maldives aims for a total protection of their waters and would like to proclaim the entire country a UNESCO biosphere reserve by 2017 and the country as a Marine Reserve by 2020. Let´s see how this amazingly beautiful country threatened by climate change and waste will manage with such big expectations.

Sylvia Jagerroos is a specialist in marine conservation and has spent the last two years working in the Maldives, a Country threatened by climate change and where the marine environment is directly linked to sustainable fisheries, renewable energy sources, tourism and a proper waste management system.

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Can reef conservation be both enjoyable and profitable?

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wakatobi

At Wakatobi Dive Resort, guests are always thanked for coming to enjoy this special place, as it is their presence that creates the magic making ongoing reef conservation efforts a reality. “The more you know, the more you notice,” says in-house marine biologist Julia Mellers. “And what better place to learn about reef biodiversity and custodianship than in Wakatobi.”

“My main project for the first year is to establish a way of monitoring the health of Wakatobi’s reef ecosystem,” Julia says. “This will allow us to provide hard scientific proof that Wakatobi’s conservation model measurably benefits reef health. Holding a finger to the pulse of the reef will also assist management decisions, such as identifying priority areas for increased protection.”

Modern methods for reef management

The Wakatobi Reef Health Assessment program utilizes a customized set of modern imaging and data analysis techniques that provide a comprehensive indication of the state of a reef ecosystem. “We use the latest ecological theory, technology, and artificial intelligence to develop a novel package to efficiently and robustly measure reef health,” Julia says. “This will enable us to monitor how Wakatobi’s reefs are faring throughout the protected area without significantly diverting resources from protecting the reefs.”

The process begins in the water, capturing the reef’s sights, sounds, and landscape. Above water, Julia is developing and implementing analysis methods and training machine learning models to extract measures of reef health from captured data. When not on the island, she will research new approaches and ideas for coral reef assessment and help spread the word about Wakatobi’s scientific initiative.

“It’s an absolute privilege to work within a system that benefits both the reefs and the local people,” says Julia. “It also gives us a unique opportunity to assess and document reef health and dynamics within an ecosystem that is actually getting healthier. In stark contrast to declines in coral health recorded elsewhere, our scientific data is already beginning to demonstrate Wakatobi’s astonishing biodiversity – which is evident to anyone who ventures underwater at the resort.”

The program focuses on three indicators of reef health: the diversity of the reef community, which measures the variety and abundance of living organisms colonizing the reef surface; structural complexity, describing the degree to which the reefs incorporate elaborate details; and reef soundscapes, recording the noise a reef’s inhabitants make, including the snapping of shrimp and the feeding sounds of fish. By measuring these elements, it is possible to estimate how much life the habitat supports.

“Luckily, we don’t have to work all that out manually,” Julia says. Artificial intelligence plays a vital role. “I train machine learning models to identify signals of reef functioning that would otherwise be undetectable. For example, a model can be trained to recognize the sounds that characterize a healthy reef. This allows us to monitor the reefs at a scale, and with a thoroughness that would otherwise be inconceivable.”

Julia and the dive team have also started an eDNA survey of the reefs. ”This involves taking seawater samples near the reef at different depths and filtering them to trap environmental DNA (eDNA) that organisms shed into the water,” Julia explains. “The samples are now in a lab, where the DNA is labeled using probes and sequenced to identify which species are around. Using this technique, we should be able to detect hundreds of species from just a single litre of seawater. It’s a very cool process!”

wakatobi

A Wakatobi welcome

Julia says the Wakatobi team has been exceptionally supportive and welcoming. “They are able to maintain a totally laid-back atmosphere while coordinating an exceptionally professional operation.” She adds that Wakatobi feels remote in the best ways, with pristine reefs, peace, and quiet, while also being an extremely comfortable and well-connected place to work.

“Working within a system that works for the reefs because it works for the people is an absolute privilege,” she says. “It also gives us a unique opportunity to unpick reef health and dynamics within an ecosystem that is actually getting healthier. In stark contrast to declines recorded elsewhere, our scientific data is already beginning to demonstrate the astonishing biodiversity evident to anyone who ventures underwater at Wakatobi.”

The Wakatobi team has also proven to be an invaluable source of knowledge about the local ecosystem,” Julia says. “Wakatobi makes the perfect scientific laboratory. Being able to go from library to laptop to reef, all in the space of a hundred meters, is the perfect recipe for generating new ideas and trying them out. It is so exciting to work with open-minded innovators keen to try novel approaches and look at things from different angles.”

“Having such a dynamic team has meant that we’ve made progress quickly,” Julia says. “So far, we have a highly accurate machine learning model that classifies the reef community, a method to analyze the sounds that reef critters make, and a fully automatic way of measuring fish abundance. We are also in a position to add to this repertoire, trialing different techniques to quantify the complex 3D structure that corals make. We have added DNA analysis to the arsenal, which enables us to detect biodiversity invisible to the naked eye.”

From frogs to frogfish

Julia acquired her love of nature and biology from her parents, whom she describes as eco-friendly before the concept became trendy. “Camping, compost heaps, and Attenborough documentaries were features of a nature-centric English childhood. I raised pond-dwelling critters, peered down microscopes, and became transfixed by cephalopods.” Biology was an inevitable choice, she says, and the sea came into her life at a young age. “Having long been a sailor, with a family of sailors, I am at home at sea,” she says. “I took my first sip of compressed air at the bottom of a swimming pool in London and have spent as much time as possible eye-to-eye with octopuses since.”

After completing an undergraduate degree in biology at Oxford University, Julia shifted her Master’s focus to marine biology. It was a move she describes as swapping frogs for frogfish. “I went into marine biology because I see marine biological research as a powerful tool to connect people with the planet,” she says. “Of course, nature should be worth more to us preserved than destroyed – but if you can’t put a price on it, no one pays. Wakatobi has created an economic engine that financially incentivizes reef custodianship. This leads to an ideal scientific setting – demonstrably vibrant reefs linked to genuine socio-economic fairness.“

Julia’s Master’s project was done in collaboration with the Australian Institute of Marine Science and investigated mysterious bare rings of sand that surround reef patches within algal meadows. “We think these ‘reef halos’ form because foraging fish will only venture a short way from the shelter of a coral patch if they are under threat from patrolling sharks,” she says. “Since you can spot these halos from satellite images, they could be a neat way of keeping an eye on shark populations from space… and a possible addition to Wakatobi’s monitoring program”!

As the Reef Health Assessment program progresses, Julia will create new learning and participation opportunities for guests to enhance the depth and enjoyment of their Wakatobi experience. Wakatobi Dive Resort will also continue to provide updates and insights on the important work Julia and the rest of the Wakatobi team are doing to understand and protect some of the world’s most pristine and spectacular coral reefs.

Many thanks go to Wakatobi’s guests, whose continued enjoyment of the marine preserve helps keep ongoing reef protection efforts a reality!

Contact the team at office@wakatobi.com or enquire >here.
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View Wakatobi videos on the YouTube Channel.

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Marine Life & Conservation

Book Review: Coral Triangle Cameos

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Coral Triangle Cameos. Biodiversity and the small majority by Alan J Powderham

This colourful coffee table style book wonderfully shows off the incredible and vibrant marine life of an area, roughly triangular, that spans the waters of Indonesia, Malaysia, the Philippines, Papua New Guinea, the Solomon Islands, and Timor-Leste. The biodiversity here is incredibly rich. And this book covers the wonders that those lucky enough to dive here can experience.

It is worked into chapters that cover the types of marine life found here from coral to worms and everything in-between. The chapter on corals features lovely wide angle scenes, as well as close up details. And all the following chapters contain stunning images and interesting descriptions of both common and rare animals that have divers flocking to this region to discover. I think the cephalopods are my favourite. But this book certainly offers plenty of other options to marvel at.

This is a book to dip in and out of. Enjoy the beautiful images within (of which there are many). Peruse the descriptions of your personal favourite species and learn about new behaviours and interactions that are part of every day life on these abundant reefs. It is the type of book that will keep you coming back over and over again. And will always bring a smile to your face as you explore this incredible underwater world and the marine life that calls it home.

What the Publisher Says:

Dive into the Hidden Wonders of the Coral Triangle, a kaleidoscope of marine life which boasts the greatest biodiversity in the oceans. While most focus on the giants of the deep, Coral Triangle Cameos celebrates the “small majority” — the tiny but vital creatures that power this underwater paradise.

Renowned underwater photographer Alan Powderham brings the unseen to life with stunning visuals and he divulges the fascinating science behind these diminutive wonders in an accessible, relatable way.

About the Author:

Alan J Powderham is a seasoned underwater photographer with over 40 years of experience capturing the magic of the ocean depths. His previous books include At the Heart of the Coral Triangle (2021).

Book Details

Publisher: Dived Up Publications

Hardcover

Price: £45

ISBN: 978-1-909455-57-3

Published: 17th September, 2024

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