Principal investigator | Lab leader | Professor of Ecology at UFPEL.
Jef is a Brazilian ecologist interested in the ecology, evolution and conservation of animal-plant interactions. He often uses network analyses and null models to investigate how interactions are organized and how they define community structure and functioning. Pollination and seed dispersal interactions are his main study systems.
In his free time, Jef practices yoga, plays soccer and spends time in nature.
Current members
Postdocs
Andrés is investigating patterns and processes underlying intraspecific interactions among antswarm follower birds and on seed dispersal networks. In his free time, he will likely be found biking, reading or enjoying 'asado' and dark beer with friends and family (including Ziggy, at the right)
Lab manager
Juliana manages data, materials, and collections for our lab. She is biologist interested in spatiotemporal variation in traits associated with seed dispersal interactions across population and community scales.
Graduate students
Alias is a Paraguayan biologist studying frugivory and seed dispersal of Ilex paraguariensis, Ilex microdonta, Ilex brevicuspis in the southern Atlantic Forest, where these forests meet the Pampas grasslands.
Bruna is investigating how fruit and seed traits related to frugivory and seed dispersal vary across large scales. She is also helping to create a fruit and seed collection form South Brazil.
Fernanda is studying the similarity in seed dispersal networks at the Southern range of the Atlantic Forest, where it meets with the Pampas grasslands. Her thesis is co-supervised by Jef and Prof. Milton Mendonça (UFRGS).
Marcos studies how climate change may impact the co-occurrence of key frugivores and plants in Southern Brazil. During his undergrad, he studied interactions among plants and flower-dwelling mites that use hummingbirds to move from flower to flower.
Victor is investigating the roles of species abundances in determining the frequencies of frugivory interactions and how they shape plant-disperser networks. During his undergrad, he investigated frugivory and seed dispersal of the palm Syagrus romanzoffiana.
Undergraduate students
Alan is investigating how fruit and seed traits related to frugivory seed dispersal and helping our with the creation of a seed and fruit collection
Arthur is using molecular tools to investigate seed dispersal interaction using fecal semples collected in southen Brazil.
Field Technicians | Equipe de campo
Seeds of Change Project
(2024-2025)
(from left to right):
Alia Amada Arce Viveros
Bruna Peixoto Lovato
Fernanda Carello Collar
Juliana Hinz Wolter
Joana Tomazelli
Kassiane Garcia Gonçalves
Jef Vizentin-Bugoni
Extra-lab students
Lis is a PhD student at UNESP-Botucatu. She investigates processes shaping hawkmoth-plant interactions under the primary supervision of Dr. Felipe Amorim.
Camilo is a Colombian biologist studying tick diversity in the Pampa Biome and its associations with hosts and microorganisms, under the primary supervision of Dr. Rodrigo Krüger at UFPEL.
Former students (gone but not forgotten)
Fernanda investigated which traits define keystone species in a seed dispersal network in Southern Brazil. She was advised by Rafael A. Dias and co-advised by Jef. She is currelty and PhD student at UNIPAMPA-São Gabriel.
Lis investigated the role of evolutionary histories in shaping mutualistic hawkmoth-plant interactions. Her results are published at Arthropod-Plant Interactions. She was advised by Cristiano A. Iserhard and co-advised by Jef.
Maria Otília studies the parasitic interactions between birds of prey and helminths. Her thesis is entitled "Comunidades helmínticas e ecologia do parasitismo em aves de rapina no extremo sul do Brasil". She was advised by Ana L. S. Valente and co-advised by Jef.
Master's in Animal Biology. Maiara investigated individual specialization on seed dispersers in a plant population Her results are published in Oecologia and Journal of Ornithology. She was advised by Rafael A. Dias and co-advised by Jef. Later Maiara earned a PhD at UFMS.
Gabriel used molecular tools to process fecal samples and investigate frugivory interactions at a 'restinga' forest.
BSc in Biology - Andreza studied the structure of mutualistic hawkmoth-plant interactions and its drivers. Her results are published in Ecological Entomology
PIs of the main active collaborations
Professor at University of Wyoming | Projects: Hawaii-VINE Project and Army Ant Followers Project
Professor at Federal University of Pelotas | Plant-hawkmoth interactions
Professor at Universidade Estadual Paulista - Botucatu | Plant-hawkmoth interactions
Postdoc at University of Illinois at Urbana- Champaign | Army Ant Followers Project
Oberlin College & Conservatory | Evolutionary ecology of seed disperser birds and plants | Co-PI at the Seeds of Change Project
Professor at University of Illinois at Urbana- Champaign | Hawaii-VINE Project
Professor at University of Wyoming | Project: Hawaii-VINE Project
Professor at Federal University of Pelotas | Flower-breeding Drosophilids and plants ecology and evolution
Professor at Federal University of Ceará | Co-PI at the Seeds of Change Project
Professor at Federal University of Rio Grande do Sul | Expert in species interactions| Co-advises sudents usingthe Seeds of Change Project datasets
Professor at Federal University of Minas Gerais | Plant-hummingbird interactions in urban areas
Professor at Federal University of Pelotas | Ecology of grassland birds | Ecology of frugivore birds