Boosting Marine Life and Conservation Effort

Posted on October 26, 2024October 26, 2024 by Annabel Thomas

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Boosting Marine Life and Conservation Effort

by Fahmi, AMD-B’s 2024 Divemaster Internship

Artificial reefs are man-made structures that help restore marine ecosystems. They provide places for corals to grow, attract fish, and support overall marine biodiversity. By mimicking natural reef environments, these structures help restore areas where coral reefs are damaged or missing.

How Artificial Reef Work

Corals need the right space to grow—they require enough sunlight, suitable temperatures, and the proper minerals to thrive. Naturally, corals will spread to open spaces, but this process takes a long time and relies on perfect conditions.

Coral reproduction happens in two main ways: sexually and asexually. In sexual reproduction, fertilized coral eggs (or larvae) drift and settle in open spaces, but they need ideal conditions—plenty of sunlight and no obstructions—for this to happen. Asexual reproduction occurs through fragmentation, where pieces of coral break off and grow independently. This is where artificial reefs come into play.

By planting coral fragments on artificial structures, we give corals a “jump-start” in their growth, reducing their vulnerability in the early stages. The rough surfaces of artificial reefs also provide excellent places for sexually reproduced corals to attach and grow, offering a stable environment for both types of coral reproduction. This helps speed up the recovery process and supports the overall health of the reef ecosystem.

What Happens After Installation

The impact of artificial reefs can be seen quickly. Fish are often attracted to the new structures within hours, swimming around and using the spaces for shelter. After a few weeks, you’ll notice algae, sponges, coralline algae, and even anemones starting to grow on the surfaces. Fish may also begin to protect the area as their territory.

Over time, the artificial reef becomes more complex, offering shelter, feeding grounds, and even breeding spaces for different species. This encourages a diverse range of marine life to thrive, making artificial reefs an important part of marine conservation efforts.

Artificial Reef in Bali

Artificial reefs in Bali are planned and developed by various groups, including NGOs, the government, local villages, and businesses. These structures come in all shapes and sizes, with some specifically designed to support coral restoration, while others serve as tourist attractions.

For example, in Amed, you’ll find pyramid-shaped artificial reefs alongside unique designs like the “Post Office” and “Temple.” Padangbai features hexagonal structures, small boats, and cube-like formations that enhance marine habitats.

In Tulamben, the USAT Liberty Shipwreck, though not intentionally planned as an artificial reef, has transformed into a thriving ecosystem, attracting divers from around the world. In Nusa Penida, a technique known as the “rope method” involves hanging corals on ropes, providing protection from predators and promoting faster growth.

AWARE Week 2024

Posted on September 27, 2024September 27, 2024 by Annabel Thomas

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AWARE Week 2024

by Fahmi, AMD-B’s 2024 Divemaster Internship

From 14 to 22 September, AquaMarine Diving – Bali (AMD-B) participated in the annual PADI AWARE Week, a global initiative to highlight marine conservation efforts. This year, we conducted an additional clean-up at the Jetty, a dive site known for its macro life, which hadn’t been checked in a while.

Although we regularly conduct clean-ups throughout the year, this extra session at the Jetty aimed to address the growing accumulation of debris, particularly plastic and fish net waste, which has been a persistent issue at the site.

2024 Underwater and Beach Clean-Up Results (so far)

In 2024, we have gathered a total of 42.765 kgs of debris from underwater clean-ups and 40.98 kgs from beach clean-ups. When compared to previous years, we’ve noticed a slight decrease in the amount of debris collected in some areas, such as Blue Lagoon, which have less than a kilogram of waste in recent months.

Plastic made up 80.49% of the trash collected this year, and the presence of discarded fish nets adds to the environmental threat by entangling marine life. Despite the overall decrease in debris, these materials continue to pose a significant challenge that requires ongoing attention.

When comparing this year’s data to 2023, we noticed some key changes. In 2023, a total of 217.325 kgs of debris was collected from underwater clean-ups, compared to 42.765 kgs in 2024. Beach clean-ups also saw a significant reduction, with 146.94 kgs collected in 2023, whereas 40.98 kgs has been collected in 2024 so far.

The notable decrease in debris collected this year could indicate a positive trend in reduced waste accumulation at some sites. During last year’s AWARE Week, we gathered a larger amount, particularly 15.67 kgs from the Jetty. This year, we collected 2.7 kgs during our clean-up at the same site. This sharp difference may suggest a reduction in large debris but highlights the ongoing issue of smaller, often overlooked waste.

Parrotfish: The Key to Coral Reef Resilience

Posted on August 23, 2024August 23, 2024 by Annabel Thomas

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Parrotfish: The Key to Coral Reef Resilience

by Fahmi, AMD-B’s 2024 Divemaster Internship

Coral reefs are bustling underwater cities, teeming with life and colour. But behind the scenes, one often overlooked resident plays a crucial role in keeping these vibrant ecosystems in balance: the parrotfish. These fascinating creatures are essential for the health and resilience of coral reefs, particularly in regions like Bali, where reefs are a vital part of the marine environment.

Parrotfish are hard to miss with their bright colours and distinctive beak-like mouths, which resemble a parrot’s beak – hence the name. This “beak” is actually a set of fused teeth that the parrotfish uses to scrape algae off coral and rocks. They’re not just pretty faces; parrotfish are equipped with powerful jaws that make them excellent at their job.

Interestingly, parrotfish are known for their ability to change sex during their lifetime. Many start out as females and later become males, a trait that adds to their adaptability in maintaining healthy populations.

Why Parrotfish Are Key to Coral Reef Survival

The main job of a parrotfish is to keep algae in check. Algae can quickly overgrow and suffocate coral reefs if left unchecked, blocking sunlight and making it difficult for corals to thrive. Parrotfish help prevent this by grazing on the algae, essentially giving the coral space to breathe and grow.

But that’s not all they do. Parrotfish also contribute to the creation of sandy beaches. As they scrape algae and bits of coral, they ingest chunks of coral rock, which they grind up in their digestive systems. The result? Fine, white sand that they excrete, which over time helps form and replenish beaches. It’s a natural process that plays a significant role in coastal ecosystems.

The Challenges Parrotfish Face

Despite their importance, parrotfish populations are declining in many areas due to overfishing and habitat destruction. In some regions, they are harvested for food, and with fewer parrotfish around, algae can quickly take over, leading to degraded coral reefs.

Climate change also poses a threat, as warming waters and ocean acidification further stress coral reefs, making the role of parrotfish even more critical. Protecting these fish is essential for maintaining the health and biodiversity of coral reef ecosystem.

Conservation Efforts and Why They Matter

Conservation measures are being put in place in various parts of the world to protect parrotfish. Marine Protected Areas (MPAs), fishing bans, and community-led conservation initiatives are some of the strategies being used to safeguard these vital reef residents. In Bali, where tourism and fishing pressure are high, protecting parrotfish is key to ensuring that coral reefs remain resilient against future environmental changes.