the situation has reversed in some years: Canada's forests have become carbon sources, releasing more carbon into the atmosphere than they are accumulating in any given year." This country's managed forests have been a "significant carbon sink," says Natural Resources Canada on its website, given how the forests have steadily added carbon to that which was already stored.īut the NRCan site also notes that "in recent decades. "Especially given that the solution of mangroves is not a possibility in Canada." "The soil among mangroves has low biological activity and therefore that carbon is released slowly."Ĭlerac suggests mangroves shouldn't really be viewed as an either/or scenario when it comes to sequestration, or better or worse than others, but as one possibility. Tania Clerac, dean of the school of environmental and natural resource sciences at Fleming College in Peterborough, Ont., said via email that mangroves and terrestrial systems "do store carbon in different ways, with trees storing carbon in their biomass, and mangroves sequestering it in their soil." "At a high level, are salty and wet, and that keeps the carbon from breaking down," Jen Howard, senior director of the blue carbon program for the American non-profit Conservation International, told GreenBiz.Ĭonservation International says mangroves, which have been in decline in recent years, can sequester up to 10 times as much carbon compared to terrestrial forests.
Mangroves (like the one being repopulated in the photo above) hold a particular allure as carbon sinks. Proctor and Gamble, Apple and Gucci have all announced projects to protect and restore the mangrove, a woody tree or shrub living in salty coastlines in the tropics and subtropics. With that in mind, it is notable to see a new tree-related carbon project finding favour with some high-profile corporations. With wildfires and natural die-off, trees sometimes give off more carbon than they absorb.Īnd when it comes to sequestration, some trees and their ecosystems appear to be more effective than others over time. This newsletter has often looked at the part trees can play as part of the climate change solution, with their ability to suck carbon out of the atmosphere and store it.Īs with so much else, however, there is nuance - we need to be careful about assuming trees alone can save us. (Chaideer Mahyuddin/AFP via Getty Images)
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