From the mangroves of Southeast Asia to the coasts of West Africa, there is a green shoot of sorts. Global coverage of these vital coastal forests has begun to inch upwards after decades of relentless destruction. According to a new analysis by the Global Mangrove Alliance, the net loss has been reversed in several key regions, a development that environmentalists are understandably keen to flag. But as a financial editor who has seen too many 'green shoots' wither, I advise caution. The data is promising, but the underlying economics remain fragile.
Consider the numbers. The alliance, a consortium of conservation groups, reports that between 1996 and 2016, the world lost nearly 3,800 square miles of mangrove. That is a capital destruction of epic proportions. Mangroves are not just trees. They are natural infrastructure. They buffer coastlines from storm surges, sequester carbon at rates up to four times higher than tropical rainforests, and support fisheries worth billions. To destroy them is to write off a productive asset. The reversal, therefore, is good news. The report highlights successful restoration projects in Vietnam, Indonesia, and Brazil. But let us not mistake a rebound for a bull market.
A closer look reveals the recovery is patchy. The net gain is a mere 135 square miles. That is less than 0.1% of the total global coverage. In financial terms, we have merely stemmed the outflow, not reversed the trend. The real problem is that the incentive structure remains skewed. Mangroves are often cleared for shrimp farming, palm oil plantations, or urban development. These activities offer immediate, tangible returns, while the benefits of mangroves are diffuse and long-term. This is the classic tragedy of the commons, playing out in our estuaries.
The press release from the alliance is careful to credit policy changes and community engagement. That is fair enough. But the driving force behind the recovery is likely the simple fact that the most accessible and profitable mangroves have already been cleared. The remaining stands are either on marginal land or under protective regimes. Diminishing returns, not conservation enlightenment, may be the true catalyst.
Investors and policymakers should take note. The carbon credit markets are beginning to wake up to the value of 'blue carbon'. Mangrove projects can now generate credits sold on voluntary markets. In 2021, a project in Pakistan's Indus Delta sold credits for $30 a tonne. That is a start, but it is a fraction of the true social value. If we want a sustained recovery, we need a price signal that reflects the full balance sheet. Governments must stop subsidising the destruction and start rewarding preservation. Otherwise, the current uptick will be just a blip in the long-term chart of decline.
Central bankers talk about financial stability. Here is a case where ecological stability is synonymous. Mangroves are a buffer against climate volatility. Their loss exacerbates risk. The Bank for International Settlements has published papers on 'green swan' events. This is one. A rational market would price in the value of these natural assets. But markets are often myopic. The reversal is a rare piece of good news in the environmental ledger. Let us not waste it. But neither let us pretend the fundamental problem is solved. The bottom line is not yet in the black.
