Friday, August 10, 2018: 8:00 AM-11:30 AM
344, New Orleans Ernest N. Morial Convention Center
Co-organizers:
Pedro Jordano
and
Eugene W. Schupp
Moderator:
Claudia P. Paz
The focus of our session, seed dispersal in a human-dominated world, is still a relatively poorly understood phenomenon of great conservation importance. Seed dispersal is both affected by anthropogenic environmental change and affects the ability of plants to respond to those anthropogenic changes. As the single opportunity for plants to move, seed dispersal has important impacts on plant fitness, range shifts, and patterns of biodiversity. Though seed dispersal is and will continue to be disrupted by climate change, fragmentation, invasion of exotic species, and other anthropogenic processes, we still lack comprehensive models to predict extinction risk of plant species due to such disruptions of seed dispersal. This calls for increased efforts to understand how seed dispersal processes and outcomes are being altered in the Anthropocene and how to integrate this knowledge more explicitly into population and community models. In this organized oral session we present a combination of case studies and broad-scale reviews to explore what we understand and do not understand about anthropogenic impacts on dispersal from a variety of perspectives. A series of speakers address ecological and genetic consequences of disruption of disperser communities ranging from reductions in population abundances to loss of particular functional groups such as megafauna or dispersers providing long-distance dispersal services, to the complete loss of the disperser assemblage in an island ecosystem. Other speakers focus on restoration of a disperser assemblage, the impact of roads on dispersal in a tropical forest, and the myriad ways that climate change might alter the quantity and quality of seed dispersal. The ultimate goal is to improve our understanding of anthropogenic impacts on dispersal in order to increase our ability to predict the relative role of dispersal for plant populations and communities under changing conditions in the Anthropocene.
8:40 AM
Restoring seed dispersal to an empty forest: A case study from the island of Guam
Haldre S. Rogers, Iowa State University;
Evan C. Fricke, Iowa State University;
Ann Marie Gawel, Iowa State University;
Henry Pollock, Colorado State University;
Evan Rehm, University of California, Santa Barbara;
Julie Savidge, Colorado State University;
Hugo Thierry, McGill University;
Elizabeth M. Wandrag, University of Canberra
10:50 AM
Roads disrupt seed dispersal in animal-mediated plants in an Amazonian rainforest
Pierre-Michel A. A. Forget, Museum National d'Histoire Naturelle;
Aurélie Albert-Daviaud, Muséum National d'Histoire Naturelle;
Olivier Boissier, Muséum National d'Histoire Naturelle;
Axelle Bouiges, Muséum National d'Histoire Naturelle;
Caroline Dracxler, Muséum National d'Histoire Naturelle;
Marion Ducrettet, Muséum National d'Histoire Naturelle;
François Feer, Muséum National d'Histoire Naturelle;
Irene Mendoza, Muséum National d'Histoire Naturelle