Banca de DEFESA: BRENO DIAS VITORINO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : BRENO DIAS VITORINO
DATA : 15/07/2022
HORA: 14:00
LOCAL: ENSINO REMOTO EMERGENCIAL
TÍTULO:

Ecological networks and mutualism between birds and plants: from a protected area to urban environments in the Neotropics.

PALAVRAS-CHAVES:

Ecological determinants, Phenology, Neutrality, Role of species, Methodological bias

PÁGINAS: 162
GRANDE ÁREA: Ciências Biológicas
ÁREA: Biologia Geral
RESUMO:

Mutualistic interactions are those with positive effects for everyone involved and this incredible process is known to be one of the main pillars that structure biological communities. From this perspective, ecological network analysis emerges as a promising tool, including interactions between species as an additional layer to unravel ecological processes. Thus, in this thesis -under development-, using ecological network approaches, we evaluated mutualistic interactions between birds and plants. The document is divided into three chapters: in the first one “Influence of sampling methods on the description of a neotropical seed dispersal network”, we discuss how different sampling methods can compromise the interpretation of the evaluated network. Among our findings, we highlight that the choice of method, phytocentric or zoocentric, significantly influences the characterization of networks, with structural and species-level implications. In chapter 2: “Core-periphery roles of birds in a Neotropical seed dispersal network is determined by abundance”, we describe the seed dispersal network of a preserved area and identify, among the birds, those with “core” positions as well as which ones are the main ecological determinants that can influence this positioning. Our results pointed to a network with a modular structure and core-periphery formation. From the congruence of different framewoks, we highlight Ramphocelus carbo and Pipra fasciicauda as one of the most central species of the network, and we show that even though it is a system of interactions established in a preserved area, abundance was one of the main determinants of structural roles assumed by birds. . In the third chapter: “Assessing the ecological determinants of interactions to plan for urban greening: an example with a plant-hummingbird network”, we describe an established system in an urban environment and, in a pioneering way, we identify the main ecological drivers that govern the interactions between hummingbirds and plants in an anthropized environment. We showed that among the mechanisms of neutrality and niche, the phenological factors (niche) were the most explanatory. Furthermore, evaluating the robustness of this system using a recent rearrangement model after local extinction simulations, we found that the loss/removal of native plants to the detriment of exotic plants affects more the structure of the network and the morphological matching mechanism between species ( niche), promotes greater robustness.

MEMBROS DA BANCA:
Externo à Instituição - CAMILA SILVEIRA DE SOUZA - Unimontes
Interno - 84207007 - CAROLINA JOANA DA SILVA
Presidente - 66972005 - JOSUE RIBEIRO DA SILVA NUNES
Interno - 71440008 - MANOEL DOS SANTOS FILHO
Externo à Instituição - RAFAEL BARROS PEREIRA PINHEIRO - UNICAMP
Interno - 001.165.931-99 - WILKINSON LOPES LAZARO - UFRJ