Ellen Andresen

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Ellen Andresen and son Esteban Pérez,
September 2003.


Ellen Andresen is a researcher at the Center for Ecosystem Research (CIECO) at the National Autonoumous University of Mexico (UNAM). Her main line of research focuses on plant-animal interactions, in particular seed dispersal. Her research on dung beetles deals with the role that these insects play in plant regeneration by acting as secondary dispersers of seeds defecated by frugivorous animals. She is also interested in the effects that forest fragmentation and other habitat disturbances may have on the interaction between seeds, frugivores, seed predators, and secondary dispersers (dung beetles). She has conducted research on dung beetles in the Amazonian rainforests of Perú and Brazil, and also in the tropical dry forest of western México. She is currently investigating the effects of season and forest type on the organization of dung beetle communities in the Mexican dry forest, as well as the use of these insects as bioindicators for habitat disturbance in this kind of tropical forest.

Apartado Postal 27-3
Morelia, C.P. 59089


Terborgh, J. & E. Andresen. 1998. The composition of Amazonian forests: patterns at regional and continental scales. Journal of Tropical Ecology 14: 645-664.

Andresen, E. 1999. Seed dispersal by monkeys and the fate of dispersed seeds in a Peruvian Rainforest. Biotropica 31: 145-158.

Andresen, E. 2000. Ecological roles of mammals: the case of seed dispersal. In: Entwistle, Abigail and Nigel Dunstone (Eds.) Future priorities for the conservation of mammalian diversity: Has the panda had its day? Pp. 12-25. Cambridge University Press, Cambridge, UK.

Andresen, E. 2001. Effects of dung presence, dung amount, and secondary dispersal by dung beetles on the fate of Micropholis guyanensis (Sapotaceae) seeds in Central Amazonia. Journal of Tropical Ecology 17: 61-78.

Andresen, E. 2002. Primary seed dispersal by red howler monkeys and the effect of defecation pattern on the fate of dispersed seeds. Biotropica. 34: 261-272.

Andresen, E. 2002. Dung beetles in a Central Amazonian rainforest and their ecological role as secondary seed dispersers. Ecological Entomology. 27: 257-270.

Andresen, E. 2003. Effect of forest fragmentation on dung beetle communities and functional consequences for plant regeneration. Ecography. 26: 87-97.

Cintra, R. & E. Andresen. 2003. Predação de sementes e frutos de espécies arbóreas pelo rato Mesomys hyspidus (Echymidae) na floresta Amazônica. En: Cintra, R. (Ed.) Historia natural, ecologia e conservação de algumas espécies de plantas e animais da Amazônia. Pp. 369-378. Editora da Universidade do Amazonas. Manaus, Brasil.

Andresen, E. & D.J. Levey. In press. Effects of dung and seed size on secondary dispersal, seed predation, and seedling establishment of rain forest trees. Oecologia.

Andresen, E. & F. Feer. In press. The role of dung beetles as secondary seed dispersers and their effect on plant regeneration in tropical rainforests. En: Forget, P.M., J. Lambert, P. Hulme & S. Vander Wall (Eds.) Seed fate: Predation, dispersal and seedling establishment. CABI International, Oxon, UK.

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