Damaged coral reefs cause decline in fisheries, risks for coastal communities

The degradation of the world's coral reefs is causing a sharp decline in fisheries and putting coastal communities in peril, a new study has found.

Fish catches along the world's coral reefs peaked nearly two decades ago and have been diminishing since, according to a study published in the journal One Earth on Friday.

The catch per unit effort, a measurement of biomass, is 60% lower than in the 1950s, researchers found.

During that time frame, the global coverage of living corals and the biodiversity of species dependent on the underwater structure have declined by similar levels.

That meant a decrease in the capacity of coral reefs to provide food and livelihoods, sequester carbon and serve as a buffer against extreme climate events.

"The reduced capacity of coral reefs to provide ecosystem services undermines the well-being of millions of people with historical and continuing relationships with coral reef ecosystems," reads the study.

The future of human coastal communities that depend on coral reefs is in doubt, the study concluded. Indonesia, the Caribbean and the South Pacific are already seeing impacts to subsistence and commercial fisheries as well as tourism.

For the study, researchers conducted a global data analysis that covered coral reef trends and associated ecosystems that included living coral cover, biodiversity and changes in food webs, as well as fisheries and seafood consumption by indigenous peoples.

The study concluded that climate change, overfishing and pollution have put the world's coral reefs in jeopardy.

"Coral reefs are known to be important habitats for biodiversity and are particularly sensitive to climate change, as marine heat waves can cause bleaching events," Tyler Eddy, a research scientist at the Fisheries & Marine Institute at Memorial University of Newfoundland, said in a statement.

"Coral reefs provide important ecosystem services to humans, through fisheries, economic opportunities and protection from storms," said Eddy, who started the research when he was a postdoctoral fellow at the University of British Columbia's Institute for the Oceans & Fisheries.

Those impacts have come despite the marine-protection efforts, since they may lack enforcement and don't address the broader issue of climate change, the study said.

A study released last year similarly found that marine preserves have limited protective abilities when faced with rising global temperatures and coral bleaching.

Addressing the problem will require a globally coordinated effort in addition to local marine management, the new study found.

It also said that current efforts such as the Paris climate accords must additionally address direct causes of diminished coral reef capacity.

Related Links
Water News - Science, Technology and Politics

Tweet

Thanks for being there;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

SpaceDaily Monthly Supporter
$5+ Billed Monthly

paypal only

SpaceDaily Contributor
$5 Billed Once

credit card or paypal

The beach is back: French Riviera marsh ditches seawalls for sand
Hyeres , France (AFP) Sept 10, 2021
To save one of the last wetlands on the French Riviera from rising sea levels, conservationists have taken the unusual step of removing its protective seawalls. Instead, they have let nature take its course. The Vieux-Salins d'Hyeres salt marshes sit just below sea level with a stretch of vital but shifting sand beach that separates them from the open sea. "The coastline was receding with each winter storm," said wetlands expert Guirec Queffeulou, who helps manage the site located in the hea ... read more