FROM THE FIELD: Weeding out Mexico’s unwanted beach invader

UNDP Mexico/Emily Mkrtichian Sargassum seaweed has blighted some of Mexico’s most pristine beaches.

This article is brought to you in association with the United Nations.


An invasive species of seaweed which has blighted tourist beaches in Mexico has become more aggressive due to the heating effects of climate change. But now, thanks to support from the UN Development Programme (UNDP), efforts are underway to hold back its advance and protect local ecosystems.

Scientists say an increase in the temperature of the sea, caused by climate change has allowed the Sargassum weed to spread, filling coastal waters and blocking sunlight essential to the growth of indigenous sea grasses and other plants.

The presence of the weed also warms the sea in localized spots. And, it’s estimated that nearly 40 million cubic tonnes of Sargassum is washing up on shores each year releasing harmful methane, a gas which absorbs the sun’s heat and leads to the warming of the atmosphere.

Read more here about how UNDP is supporting the scientific community in Mexico to manage invasive species and protect biodiversity.

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Comments

  1. While the need to address the Sargassum problem is real, articles like this that focus on Mexico are misleading and damaging to people lives who live here. 2018 was by far the worst year and 2020 has barely no Sargassum at all with forecast looking good for little this year. IN the meantime, tourists stay away, meaning people are laid off and don’t have jobs. Next year there may be Sargassum, but there is no mention of this in the article.

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