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Journal Article

Mass migration and life cycle adaptation - a survival strategy of terrestrial earth-worms in Central Amazonian inundation forests

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Adis,  Joachim U.
Working Group Tropical Ecology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society;

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Citation

Adis, J. U., & Righi, G. (1989). Mass migration and life cycle adaptation - a survival strategy of terrestrial earth-worms in Central Amazonian inundation forests. Amazoniana: Limnologia et Oecologia Regionalis Systematis Fluminis Amazonas, 11(1), 23-30.


Cite as: https://hdl.handle.net/21.11116/0000-0004-8578-F
Abstract
Horizontal mass migration of juveniles towards higher situated dryland areas due to annual
flooding of inundation forests in the Rio Negro valley (5 - 6 months) is reported for Tairona tipema
(Glossoscolecidae). The synchronization of cocoon production in adults which return to the inundation forest with receding flood, the short period needed for the offspring to mature and the acquisition of an annual life cycle are considered biological adaptations which enable inhabitation of an
extreme biotope. Vertical mass migration is reported for Andiorrhinus venezuelanus tarumanis
(Glossoscolecidae) in an inundation forest near the Rio Solimões valley. Animals move from the water-logged soil to the trunk/canopy area, shortly before annual flooding. Mucus secretion facilitates
nocturnal trunk ascents of individuals up to 19 cm in length.