Eucalyptus Trees Played Minor Role in Draining Swamps, New Analysis Suggests

Contrary to popular Israeli lore, the eucalyptus tree, long celebrated as a hero of the early Zionist settlement period, had a limited impact on draining the swamps and combating malaria, according to a new analysis. While the trees were indeed planted with the hope they would absorb swamp water and purify the air, their contribution to land reclamation was significantly less than their symbolic role in national mythology.

The eucalyptus, native to Australia, was introduced to the Land of Israel in the 19th century, with significant plantings documented in the 1880s. Early generations of Israelis grew up with the narrative that these trees were crucial in drying out marshlands and fighting the fever-carrying mosquitoes that plagued early settlements. This belief was partly fueled by the miasma theory, which wrongly attributed diseases like malaria to bad air emanating from swamps.

However, the analysis points out that eucalyptus trees require well-aerated soil and their deep root systems are damaged by constant waterlogging. Early plantings in heavily waterlogged areas often failed. The trees that thrived were typically those planted on the periphery of swamps, in already partially drained areas, or near water sources. While they consumed significant amounts of water, they were not an effective solution for large-scale swamp drainage.

Effective swamp drainage was primarily achieved through extensive engineering works, including digging canals, clearing riverbeds, and diverting water sources to the sea. These arduous tasks were carried out by both Jewish and Arab laborers. The fight against malaria also involved other methods such as distributing quinine, spraying insecticides, personal protection against mosquito bites, cleaning water sources, and introducing mosquitofish into the water.

Despite their limited role in swamp drainage, eucalyptus trees were still valuable to the Zionist enterprise. Where conditions were suitable, they grew rapidly, providing shade, acting as windbreaks, and supplying raw materials for construction and industry. Their prolonged blooming also made them an important food source for bees, a benefit that continues to this day.