OOS 36 - Conservation and restoration of tropical dry forest: From islands to continents

Thursday, August 9, 2007: 8:00 AM-11:30 AM
B3&4, San Jose McEnery Convention Center
Organizer:
Susan Cordell, USDA Forest Service
Co-organizer:
Jarrod M. Thaxton, Eastern Kentucky University
Moderator:
Susan Cordell, USDA Forest Service
Tropical dry forests comprise the largest proportion of any tropical forest type, yet when compared to tropical rainforests, they have received relatively little attention from ecologists. This is particularly troublesome, because throughout the world tropical dry forests have declined significantly, resulting in tremendous losses of biodiversity. It is estimated that less than 2% of the original forest remains intact and less than 0.08% is in a protected state. Dry forest decline has resulted from a number of factors both directly and indirectly a result of human activity: deforestation and land-use change, alien plant invasion (particularly grasses), grazing by ungulates, increases in the frequency of anthropogenic fire, loss of pollinators and seed dispersers. In many cases, agents of dry forest decline are also barriers to restoration. To overcome these barriers, restoration ecologists are working throughout the tropics on both continents and islands to develop ecologically sustainable and economically feasible solutions. While there have been a number of successes in these efforts, there has been no synthesis of these findings. Since tropical dry forests vary greatly in structure, composition and function, it is important to determine if conservation and restoration approaches are generalizable across regions. Our primary objective in this ssession is to outline a generalized approach to conservation and restoration of tropical dry forests. We will develop linkages among studies that have identified restoration barriers and tested ecological theory to develop applied solutions. In particular, we will ask: How is restoration success defined in a system where “reference conditions” may not exist? How may restoration goals and approaches differ from islands to continents or across spatial scales from hectares to landscapes? What is the potential for sustainable restoration in a community type that is likely to be particularly affected by global climate change due to its sensitivity to changes in rainfall regimes and location on oceanic islands? This session will be the first of its kind to bring together researchers focused on conservation and restoration of tropical dry forest throughout North and South America and Caribbean and Pacific islands. By linking ecological theory with restoration experiments, this symposium will provide insights that extend to other community types that have experienced long-histories of anthropogenic change.
8:00 AM
 Restoration of biodiversity: Seed, rain, and recruitment of woody species in a Mexican secondary dry forest
Cristina Martinez-Garza, Universidad Autonoma del Estado de Morelos; Rebeca Rojas, Universidad Autonoma del Estado de Morelos; Tamia Huc, Universidad Autonoma del Estado de Morelos
8:20 AM
 Cacti diversity in perturbed and conserved sites of a tropical Mexican dry forest
Luis A. Arias-Medellin, Universidad Autonoma del Estado de Morelos; Cristina Martinez-Garza, Universidad Autonoma del Estado de Morelos
9:00 AM
 Damage and short-term recovery of seasonal tropical forest in the Yucatan Peninsula following consecutive hurricanes
Martha Bonilla, University of California-Santa Cruz; Karen D. Holl, University of California, Santa Cruz
9:20 AM
 Forests at the edge: Fire and the dynamics of tropical savanna-forest boundaries
William A. Hoffmann, NC State University; Ryan Adasme, North Carolina State University; M. Haridasan, Universidade de Brasilia; Augusto, C. Franco, Universidade de Brasilia
9:40 AM
9:50 AM
 Restoration of soil processes in Mexican dry forests
Mayra E. Gavito, Instituto de Investigaciones en Ecosistemas y Sustentabilidad, Universidad Nacional Autónoma de México; Victor J. Jaramillo, Instituto de Investigaciones en Ecosistemas y Sustentabilidad, Universidad Nacional Autonoma de Mexico; Felipe García-Oliva, Universidad Nacional Autónoma de México
10:10 AM
 Conservation and rehabilitation of dry forests in the Caribbean
Ariel Lugo, USDA Forest Service; Sandra Molina Colón, Pontifical Catholic University of Puerto Rico
10:30 AM
 The influence of native plant characteristics and site conditions on restoration approaches in grass-invaded remnant Hawaiian dry forests
Susan Cordell, USDA Forest Service; Jarrod M. Thaxton, Eastern Kentucky University; Creighton M. Litton, University of Hawaii at Manoa; Robert J. Cabin, Brevard College; Darren R. Sandquist, California State University, Fullerton; Colleen Cole, USDA Forest Service
See more of: Organized Oral Session
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