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El Salvador's 'plague of water lettuce' threatens livelihoods of thousands

Alberto Castillo abandoned a boat at the shores Lake Suchitlan in July. Water lettuce had overtaken the largest lake in El Salvador, and he could no longer take tourists or fish around it. The invasive species has affected thousands of families who live near the lake.

Satellite images taken in early October reveal that the plant has covered nearly the entire lake, which is 135 square kilometers (52 square miles). Fundesyram in El Salvador, which is cleaning the reservoir, estimates 80% of it is affected. The reservoir was built in the 1970s for the country's main hydroelectric power station.

The spread of the plant has been accelerated by pollution, rain, and nutrients flowing from different tributaries. The wavy lettuce leaves have spread, forming a dense mat which blocks oxygen entering the water. This kills fish, submerged plants and makes it difficult for boats to navigate the water.

According to the data of the confederation artisanal fisheries cooperatives, the spread of the species has forced 3,000 fishermen from the lake. The local economy has also suffered a loss of at least $1.3million. Due to a decline in tourism, restaurants near the lake have reduced staff. Locals call water lettuce "the plague."

Hundreds of residents, soldiers and government workers are cleaning the lake to remove the lettuce which is not edible for humans. The lettuce invasion continues despite the fact that some areas have been cleared and are cordoned off with steel cable to prevent it from returning.

Castillo stated that "we don't have tools to stop an epidemic as large as this plant." Castillo said, "We cannot fight nature."

(source: Reuters)