Banca de QUALIFICAÇÃO: KEILA NUNES PURIFICAÇÃO

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE : KEILA NUNES PURIFICAÇÃO
DATA : 30/08/2019
HORA: 08:30
LOCAL: Universidade do Estado de Mato Grosso, Campus de Nova Xavantina
TÍTULO:

Interactions between frugivorous birds and plants in tropical savannas and forests

PALAVRAS-CHAVES:

Nestedness, Brazilian savanna, frugivory, biodiversity hotspots, mutualism, plant-animal interactions, Atlantic Forest, modularity, ecological networks

PÁGINAS: 64
GRANDE ÁREA: Ciências Biológicas
ÁREA: Ecologia
SUBÁREA: Ecologia de Ecossistemas
RESUMO:

The interaction network approach has been widely used to elucidate different questions regarding the understanding of interactions between frugivorous animals and plants, including the comparison of the structure of interaction networks at different geographical scales. Tropical forests and savannas tend to differ in many respects such as species richness, even in nearby biogeographic regions. However, no study has tested whether existing differences between tropical forests and savannas influence the structure of interaction networks between frugivorous birds and plants. Here, we compiled a dataset that included 38 frugivorous bird-plant interaction networks in two global biodiversity hotspots, the Brazilian savanna (tropical savanna) and the Atlantic Forest (tropical forest), to determine whether the structure of the interaction networks differs between tropical forests and savannas. We found significant differences between savanna and forest networks. Savanna networks were more nested than forest networks, suggesting that there is greater niche overlap among species that interact in savannas. On the other hand, forest networks were more modular than savanna networks, which indicates that there is niche partition between interacting species, that is, interactions are more specialized. Thus, forest networks are more susceptible to disturbance than savanna networks and loss of frugivorous bird species can have more direct and much stronger impacts on forest communities than on more generalists’ savanna communities, which may directly threaten seed dispersal services and the functioning of ecosystems.

MEMBROS DA BANCA:
Presidente - 068.877.126-28 - DILERMANDO PEREIRA LIMA JUNIOR - NENHUMA
Interno - 132029001 - EDDIE LENZA DE OLIVEIRA
Externo à Instituição - EDSON FONTES DE OLIVEIRA - UTFPR