14th January 2023 (5 Topics)

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Heat stress more dangerous to corals than ocean acidification

Context

Global warming poses a more significant threat to coral growth and reef accretion than ocean acidification (OA), according to a new study.

How heat stress affects corals more than ocean acidification?

Ocean acidification slows the rate at which coral reefs generate calcium carbonate, thus slowing the growth of coral skeletons.
Heat stress directly affects coral performance in hospite exacerbation of light stress in the symbionts, whereas ocean acidification induces moderate effects on coral metabolism, some of them even positive.
As temperatures rise, mass coral bleaching events and infectious disease outbreaks are becoming more frequent.

Role of corals

Corals are animals. Coral reefs boost biodiversity, buffer storms and support the livelihoods of over one billion people.
Coral reefs do not absorb carbon and do not play a direct role in climate change mitigation. However, they are important for climate adaptation.
In the last decade, the world lost about 14 per cent of its coral reefs.

Required measures

A better understanding of the underlying mechanisms that enable corals to tolerate heat can significantly improve coral reef conservation and restoration efforts

Understanding the terms

Heat Stress: Thermal stress is a term to describe a temperature change that is severe enough to cause unfavourable and even lethal conditions to aquatic organisms, their populations, community structure, or the ecosystem.
Ocean acidification: Ocean acidification describes the lowering of seawater pH and carbonate saturation that results from increasing atmospheric CO2 concentrations.

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GS Analyst: Daily Current Affairs

14th January 2023 (5 Topics)

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Heat stress more dangerous to corals than ocean acidification

Still Have Questions?

GS Analyst: Daily Current Affairs

Heat stress more dangerous to corals than ocean acidification

Still Have Questions?

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