The health of India’s mangrove forests, important to mitigate the effects of sea-level rise caused by climate warming, is influenced by tropical storms that change nutrient levels of coastal waters, according to.
Mangrove restoration can provide mitigation and adaptation solutions toand support progress towards the UN’s more broadly, says , a non-profit dedicated to the and restoration of wetlands.
The study, published in Scientific Reports, says that mangrove ecosystems have high rates of carbon sequestration which is reflected in their vast aboveground biomass and soil carbon content. Some 57 per cent of the world’s mangrove species can be found in India although the country only has about 3 per cent of the world’s mangrove forests.
, lead author of the study and researcher at the department of geography, , US, says that the study provides insights into how mangrove productivity may change with fluctuating frequency and magnitude of cyclones under a changing climate.
“Cyclones and storm events in the last two decades show a net positive effect on long-term mangrove carbon assimilation abilities across the Indian subcontinent,” Rasquinha tells SciDev.Net.
“Storm-induced nutrient fluxes andsupply play a crucial role in influencing productivity gradients in mangroves,” says Rasquinha. “However, with increasing intensity of storms in the last few years, the likelihood of this trend continuing needs further research.”
Geetha Gopinath, environmental educator and assistant professor at India’s Central University of Hyderabad, tells SciDev.Net that the study on how tropical cyclones shape mangrove productivity gradients is unique and opens new avenues in climate change . “Mangrove forests are known to capture massive amounts of carbon and sequester (trap and store) it for millennia.”
The study highlights differences in mangrove extent, species diversity and productivity between the west and east coast of India attributable to large estuarineshaped by the deltas of the Ganga, Brahmaputra, Mahanadi, Krishna, Godavari, and Cauvery Rivers.
Earlier studies have said that the diversity of mangrove species is higher on the east coast of India than on the west coast. Previous Tsunamis were far less in coasts protected by mangrove forest cover than in other areas.have also found that the losses occurring from cyclone events and even
R. Sathyajith, an environmental activist based in Kerala state, says however that mangroves are declining rapidly as they are getting degraded by, aquaculture, tourism and urban development. “Over the last century [India] lost nearly half of its mangrove areas.”
Sathyajith says the loss of mangroves is unfortunate because they are among the first lines of defence against incoming cyclones, storm surges and wind shear and more than proved their worth during the devastating Asian tsunami of 2004.
Maps developed by theteam shows that the world had some 136,000 square kilometres of mangroves in 2016. South-East Asia is home to almost a third of all mangroves, some 20 per cent of it in Indonesia.
Deepak Mishra, co-author of the study, says that an improved understanding of mangrove ecology at the local, regional and global levels is necessary to manage mangrove forests and integrate the newly-generatedwith global research efforts.
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