NSW kelp forests produce 1.5 million tonnes of biomass each year

Deep beneath the waves along the coast of New South Wales, a lush underwater world thrives, quietly playing a vital role in our fight against climate change.

These are the kelp forests, a powerhouse of marine ecosystems that produce a surprising 1.5 million tonnes of biomass annually.

Recent findings by Marine Estate Management Strategy climate change scientists have revealed that over 3.5 billion kelp plants are growing on NSW reefs. Measurements show that each kelp grows approximately 25cm per year and produces around 0.5 kg of biomass.

Climate change researcher with the Department of Primary Industries and Regional Development Dr Tom Davis, said this vast kelp production is important for marine food webs and significant for global carbon capture and storage.

“As kelp grows, it absorbs CO2 from the atmosphere, converting it into biomass and supporting many marine species,” he said.

Some of this kelp also gets buried in deep offshore waters, helping to combat climate change by removing CO2 from the atmosphere and creating ‘blue carbon'.

The research currently underway aims to deepen our understanding of this essential process.

“Ongoing research aims to better understand this process by measuring kelp production in NSW, identifying where kelp gets buried, and calculating its overall impact on carbon capture and storage,” Dr Davis said.

“By preserving and expanding these underwater forests, we can enhance their ability to absorb CO2, contributing to a healthier climate,” he added.

This research emphasises the importance of protecting these habitats for their biodiversity and its crucial role in addressing climate change.

The kelp forests of NSW are unsung heroes, offering hope for sustainable climate solutions.