Andresen and son Esteban Pérez,
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
Apartado Postal 27-3
Morelia, C.P. 59089
CONTACT INFORMATION LOST AS OF NOVEMBER 2016.
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,
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.
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.