- Since the 1950s the world has lost half of its coral reef ecosystems.
- The Intergovernmental Panel on Climate Change (IPCC) predicts that with 1.5°C (2.7°F) of warming above pre-industrial levels we could lose up to 90% of the world’s coral reefs.
- This amount of warming could happen in as little as six years.
- Experts say there’s still time to save coral reefs, but it’ll require swiftly addressing the three largest impacts to reefs: land-based pollution, overfishing and, most importantly, climate change.
Coral reefs are a unique and biodiverse natural ecosystem and economic keystones for many communities and nations. They only cover about 0.2% of the ocean floor but support 25% of marine life. Roughly a billion people worldwide depend on them for food and income. Coral reefs are also the bedrock of many important drug research developments and breakthroughs. However, climate change, overfishing, and land-based pollution are causing these reefs to perish at a swift pace.
How can we save them? Watch the video below for the full story.
“Problem Solved” is a video series by Mongabay examining big, systemic, environmental issues and potential pathways to addressing them. The second video in this series uncovers our impacts on coral reef ecosystems and interventions needed now to save them.
With the help of Arizona State University’s Center for Global Discovery and Conservation Science and the head of the Allen Coral Atlas, Greg Asner, Mongabay dives into the largest impacts to reefs, and the solutions currently on the table to address them. While climate change doesn’t affect all reefs uniformly, experts warn that it’s an existential threat. Climate change must be addressed for any interventions to work in the long term. Other interventions include addressing human and land waste, and the overfishing of waters globally.
Land-based pollution, mostly in the form of human effluent and agrochemicals, affects roughly two-thirds of the world’s coral reefs and requires governments and scientists to work together to improve waste management globally. Six in 10 individuals on the planet currently don’t have access to proper sanitation. Overfishing continues to be one of the major threats to reefs, as many reefs depend on fish and other marine creatures to survive. As of 2017, only 65% of global fish stocks were at sustainable levels.
Experts say reef restoration technologies and practices, such as breeding and replanting efforts, are important. However, they should not be viewed as a “silver bullet” to the coral reef degradation as the climate continues to warm. A recent study highlights that increasing ocean temperatures brought on by climate change could wipe out even safe havens or “refugia” where corals can recover from heat stress if the world reaches 2° Celsius (3.6° Fahrenheit) of warming above pre-industrial levels. And as things stand, we’re currently on track to reach even higher temperatures than that without more aggressive action.
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This post was previously published on news.mongabay.com and under a Creative Commons license CC BY-ND 4.
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Photo credit: iStockPhoto.com
The primary killer of coral reefs is pollution, which also stresses the coral and predisposes it to thermal stress from climate change and disease.
Human and industrial wastewater needs to be treated, we must also stop using toxic chemicals such as oxybenzone in sun-block. However the greatest killer of coral are particles. Coral feed on particles in suspension. If the particles are plastic then the plastic particles will have absorbed oxybenzone or concentrated other lipophilic chemicals many thousands of times. The other major killer of coral is the partially combusted carbon from the shipping industry and atmospheric fall out. The carbon acts in the same way as plastic and is as toxic as plastic.
We have now lost more than 50% of the world’s coral reefs, we are currently in the Caribbean and estimate 90% are dead, along with most the marine life. World wide, marine life is dying at a rate of more than 1% year on year, and when ocean acidification kicks in in about 25 years, we are going to lose everything.
We have totally deluded ourselves into thinking that climate change is the reason for all our problems, when in reality it is human pollution, especially lipophilic toxic for ever chemicals. Unless we address these issues and address them now, climate change will be like a walk in the park in comparison to what humanity will face over the next 30 years.
The GOES Report … https://lnkd.in/gYqs8VD
COP26 Presentation….. https://lnkd.in/g-axggNz
Presentation notes https://lnkd.in/gmwCXk6t