Study of flow and contemporary pollen dispersal, mating system, spatial distributi...
| Grant number: | 12/02012-3 |
| Support type: | Scholarships abroad - Research Internship - Post-doctor |
| Effective date (Start): | April 16, 2012 |
| Effective date (End): | July 15, 2012 |
| Field of knowledge: | Biological Sciences - Ecology - Theoretical Ecology |
| Principal Investigator: | Flavio Antonio Maës dos Santos |
| Grantee: | Valéria Forni Martins |
| Supervisor abroad: | Thorsten Wiegand |
| Home Institution: | Instituto de Biologia (IB). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil |
| Local de pesquisa : | Helmholtz Association, Germany |
| Associated to the scholarship: | 11/00832-0 - Influence of density and location of seed sources, dispersal and post-dispersal processes in the spatial pattern of Atlantic Rainforest trees at the Northern Coast of São Paulo State, BP.PD |
Abstract Three groups of factors influence the spatial structure of tree species: (1) adult density and reproductive system, (2) seed dispersal and (3) post-dispersal processes. Some studies have investigated the influence of these factors on the spatial structure of tropical tree species. However, no study has evaluated the spatial structure at the community level of the Brazilian Atlantic Rainforest, one of the world's hotspots for biodiversity conservation. The most advanced technique of spatial point pattern analysis is the O-ring statistics, which enables for the use of different null models for hypothesis testing. The goal of this study is to use this statistics and the suitable null models in order to determine how each factor that influences the spatial structure of populations affects the distribution of tree species in the Brazilian Atlantic Rainforest. We will use data collected in 14 ha along the altitudinal gradient at the northern portion of the mountain range "Serra do Mar", state of São Paulo, Brazil. For each species, we have determined its adult density, as well as its reproductive system and seed dispersal syndrome using specialized literature and specimens deposited at herbariums. In order to determine the influence of post-dispersal processes on the spatial structure of the tree species, we will only use data collected in more detailed studies that evaluated the size and spatial structures of some species. Then, we will obtain the value of O under different null models and in distinct distance classes in order to determine the spatial structure of each species studied. This will allow for the evaluation of the effects of each factor that influence the spatial structure of populations. (AU) | |