More than 90 per cent of marine species are undescribed and many may go extinct due to human activity before they are discovered -- the loss of unique, potentially valuable genetic resources resulting in unpredictable effects on global ecosystems essential to human food supplies and climate regulation.

Without knowledge of these species, effective deep sea conservation is impossible, leading international marine scientists warned in a new policy brief presented at the UN Biodiversity Conference (COP15) on Thursday in Montreal.

They urge global policy-makers to support urgently needed new research to fill a critical knowledge gap.

Weird animals on the verge of extinction
An Irrawaddy Dolphin (R) performs with two pink dolphins at the Oasis Sea World marine park in Chantaburi, Bangkok. Pink dolphins, also known as Indo-Pacific humpback dolphins, are among the world's most endangered species. As well as Irrawaddy Dolphin are also on the verge of extinction.Reuters

While nearly 28,000 deep-sea animal species have been described and named, an estimated 2.2 million other marine species, including deep-sea, are unknown to science, of which many are thought to be threatened with extinction.

In 2019, the scaly-foot snail (Chrysomallon squamiferum) became the first deep-sea species listed as globally endangered due to the threat of deep-seabed mining.

"Conservation of deep-sea species found in 'areas beyond national jurisdiction' is particularly challenging," the policy brief says.

"We know very little about them, and there is not yet an international framework to guide the implementation of conservation measures," says lead author of the brief, Stefanie Kaiser of the Senckenberg Research Institute and Natural History Museum, Frankfurt.

Knowledge of deep-sea species biodiversity is an obvious first step to effective protection of both the species and the ecosystem processes associated with them.

Over 7,000 new marine species have been discovered from the Pacific, Atlantic and Indian oceans.
Over 7,000 new marine species have been discovered from the Pacific, Atlantic and Indian oceans, shedding new light on understanding of microbial biodiversity in the seas.IANS

The scientists warn that deep sea species are increasingly exposed to pollution and habitat destruction.

In particular, global warming, ocean acidification and resource depletion could lead to dramatic changes in deep-sea biodiversity with unpredictable consequences for humans as well.

The scientists call for support to develop international research strategies, infrastructure, cooperation and exploration.

"Deep-sea areas seem very distant and insignificant at first glance; it's not immediately clear what this vast ecosystem and its inhabitants are doing for us," explains Kaiser.

"The deep sea -- defined as 200 to 11,000 metre depth and beyond -- is the world's largest habitat, covering more than half of earth's surface. It is essential to global climate regulation by storing carbon dioxide and heat and by maintaining biodiversity."

marine life
The oxygen in the so-called "dead zones" plummets to levels so low that many animals suffocate and die.Creative Commons

The 15th Conference of the Parties (COP15) to the United Nations Convention on Biological Diversity (CBD) is an international meeting bringing together governments from around the world.

Participants will set out new goals and develop an action plan for nature over the next decade. The government of Canada's priority is to ensure the COP15 is a success for nature.

(With inputs from IANS)

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