Personal Publications
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skype: nessa_bio2002
mobile phone: 55 11 7268 7329
address: Laboratório de Fenologia, Departamento de Botânica, Av. 24A, 1515, Bela Vista, Rio Claro/SP, Brazil. CEP 13506-900, C.P.199mailto:v.staggemeier@gmail.comshapeimage_6_link_0
Bachelor’s Degree Current Activities  Master’s Degree in Plant Biology
2006-2008 - São Paulo State University - UNESP Rio Claro
Dissertation: Reproductive patterns in Myrtaceae: an ecological and phylogenetic perspective
Fellowship: FAPESP
Collaborators: Dr. J. Alexandre F. Diniz-Filho (UFG)
Many factors shape the reproductive patterns of plants, among them climate, attraction or competition for pollinators and seed dispersers, morphology of flowers and fruits, and phylogeny.
The huge variation in reproductive patterns observed in many species makes the tribe Myrteae (Myrtaceae) an excellent model to understand how different factors affect plant reproduction. This tribe has utmost importance in the flora of many Neotropical biomes, in particular the Atlantic Forest, one of the most diverse and threatened ecosystems in the world.
In the present study, we assessed factors that affect the reproductive phenology of plants using phylogenetic comparative methods, a resolved phylogeny within a single family and detailed observations of flowering and fruiting phenology (550 individuals) from 34 Myrteae species observed during 30 months in the PEIC (Cardoso Island State Park), Cananéia, São Paulo, Brazil.
In particular, we investigated whether:
(1) Reproduction of Myrteae is seasonal and if the flowering and fruiting patterns are related to abiotic factors (rainfall, temperature, and day length);
(2) Aggregated (clumped) or segregated (divergent) flowering and fruiting patterns occur among species sharing the same pollinators or seed dispersers;
(3) Phenological and morphological traits are affected by the phylogenetic history of Myrteae species;
(4) Morphological traits influence the time of reproduction in Myrteae; and finally
(5) Ecological (environmental factors) and phylogenetic (relatedness) components have different relative importance in determining the reproductive patterns of Myrteae.
In the second part of this dissertation we investigated the composition of bird species and the structure of interactions in the seed dispersal network of Myrteae.
    We recorded, during 600 h of focal tree observation, a total of 11 plant species and 42 frugivorous species making a total of 97 interactions.
The network showed a significantly nested structure, with weak interactions and low asymmetry.
Regarding the conservation of tropical ecosystems, in particular the Atlantic Forest, the present study evidences the importance of small sized birds for the maintenance of the seed dispersal process in threatened ecosystems.
We are working on these results and they will be submitted for publication in 2010.
    The factor that contributed the most to the quantitative effectiveness of seed dispersal was the frequency of visits.
The probability of seed dispersal was influenced by the morphology of the bird and the seed.
The most important bird species that disperse Myrtaceae fruits were the ones of the family Turdidae.