Banca de DEFESA: CASSIA FERREIRA DE OLIVEIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : CASSIA FERREIRA DE OLIVEIRA
DATE: 26/07/2022
TIME: 09:30
LOCAL: https://conferenciaweb.rnp.br/webconf/vanessa-119
TITLE:

SPATIAL DISTRIBUTION OF THE MYRTACEAE EVOLUTIONARY DIVERSITY IN THE ATLANTIC FOREST

KEY WORDS:

Atlantic Forest; Biogeography; Myrteae; Phylogenetic Diversity; Phylogenetic Endemism.

PAGES: 49
BIG AREA: Ciências Biológicas
AREA: Botânica
SUMMARY:

The Atlantic Forest is a global biodiversity hotspot, and it is essential to comprehend the ecological and evolutionary processes responsible for shaping highly diverse environments. This comprehension allows a theoretical advance on the factors raising diversity, but also a practical advancement increasing the effectiveness of the spatial prioritization of areas to be protected, contributing to the conservation of hotspots. In the Atlantic Forest, Myrtaceae stands out as the most diverse woody plant family (691 species) and is an excellent model for studies because its richness patterns are representative of other taxa. Thus, this work had two objectives: (1) to map the evolutionary diversity metrics of Myrtaceae in this domain in order to understand the evolution of the Atlantic Forest flora, and (2) to assess whether the current network of conservation units in the Atlantic Forest is representative of the evolutionary diversity of the domain. We used information from articles that conducted studies in floristics represented on two databases, Caaporã and NTT, which were reviewed before analyses to correct potential species occurrence and/or nomenclatural errors. The records used summed 492 Myrtaceae species occurring in 1282 sites. The sampling of geographic space showed good coverage and robust representation of the environmental space of the domain. We found that evolutionary hotspots are concentrated in the southern portion of the Atlantic Forest, in southern and southeastern Brazil. On the Brazilian coastal regions, from the south to the northeast, are the areas with higher concentration of derivate lineages and species that are more closely related to each other, while in the interior of the southern region, the deepest lineages are concentrated. The existence of temporally stable climatic refugia to the south of the domain, as well as the history of colonization and expansion of this family in the South American continent, which begins in the south and expands to the northward, may explain the concentration of older lineages in the south of the domain. In Santa Teresa/ES and in the coastal forests of southern Bahia (Ilhéus/BA) we recorded the greatest diversity of phylogenetic endemism, sites that harbor unique lineages, restricted to these regions. The patterns of phylogenetic diversity of Myrtaceae described here corroborated patterns already described for other terrestrial taxa, such as birds and arthropods, which reinforces the use of Myrtaceae as a model group for macroecological and macroevolutionary analyses in the Atlantic Forest. The current network of protected areas in the Atlantic Forest covers part of the evolutionary history exhibited in Myrtaceae for the metrics of phylogenetic endemism and mean root distance. However, this network did no protect all variation on phylogenetic variability and diversity. This result urges future studies focusing on the indication of new areas to preserve all evolutionary components. Conserving evolutionary potential is a way to increase the chances of taxa responses to the scenarios of environmental changes predicted for the future. The results produced here should be included in spatial prioritization analyses. 

COMMITTEE MEMBERS:
Interna - 1914239 - MIRIAM PLAZA PINTO
Externa à Instituição - PRISCILA LEMES DE AZEVEDO SILVA - UFG
Externa à Instituição - THAIS NOGALES DA COSTA VASCONCELOS
Presidente - 3058386 - VANESSA GRAZIELE STAGGEMEIER