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Mautam

Cyclic ecological phenomenon

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Through Ecology, India and Mizoram

During mautam, Melocanna baccifera, a species of bamboo, flowers at one time across a wide area. This event is followed invariably by a plague of black rats in what is called a rat flood. The bamboo flowering brings a temporary windfall of seeds, and rats multiply, exhaust the bamboo seeds, leave the forests, forage on stored grain, and cause devastating famine.

Regular rodent outbreaks associated with bamboo flowering (and subsequent fruiting and seeding) also occur in the nearby Indian states of Arunachal Pradesh, Assam, Manipur, and Nagaland, as well as in Laos, Japan, Madagascar, and South America. Thingtâm, a similar famine, occurs with the flowering of another species of bamboo, Bambusa tulda.

Characteristics

There are two versions of these famines. Both concern bamboo plants, one species known as Mau and another known as Thing hence the two famines being known as Mautam and Thingtam. Mautam and thingtam have been observed to strictly alternate, with a gap of 18 years from mautam to thingtam and a gap of 30 years from thingtam to mautam. Locals have described the swarming of an insect called thangang (locusts) preceding all instances of mautam. Zoologists believe that the flowering of the bamboo attracts the migration of insects into the region hence acting as a signal.

Recorded instances of mautam include 1864, 1910–1912, 1958–1959, and 2007–2008 and those of thingtam include 1880–1884, 1928–1929, and 1976–1977. The next predicted events if this pattern continues are thingtam in 2025–2026 and mautam in 2055–2056.

In 1911 under Superintendent F.C Henniker, the missionary James Herbert Lorrain and Mizo elders, a report on the full extent of mautam and bamboo and associated indigenous knowledge was compiled. The different species of bamboo in the Lushai Hills were recorded and differentiated.

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