Banca de QUALIFICAÇÃO: PAULA KESHIA ROSA SILVA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : PAULA KESHIA ROSA SILVA
DATE: 10/07/2023
TIME: 09:00
LOCAL: Remoto
TITLE:

Studies on disruptive distribution in some groups of gelatinous marine animals

PAGES: 50
BIG AREA: Ciências Biológicas
AREA: Zoologia
SUBÁREA: Taxonomia dos Grupos Recentes
SUMMARY:

The marine environment is poorly studied, when compared to the terrestrial environment. This fact is exacerbated especially for the small benthic species. Coupled with the reality of accelerated climate change and the difficulties posed by the marine environment, the loss of information is more pronounced for less conspicuous groups of organisms, or that ones with a few number of specialists spread world around. Therefore, some groups of gelatinous organisms show large gaps in current knowledge, especially regarding their distribution patterns. Hydroids are small animals that occur in a wide variety of depths and substrates and can also colonize floating substrates. They are considered to be one of the main components of the benthic biota. It is often difficult to determine their status in terms of distributional origin (native, introduced or invasive). Another important neglected group is the family Rhodaliidae (Siphonophora), which are epibenthic animals, occupying a wide depth range, and presenting a very restricted species distribution, in contrast to the cosmopolitan distributional pattern observed in most of the other species of siphonophores. At least, we have the Ctenophora, which are found in most marine habitats and are associated with some invasion events with major ecological impacts. Some species in the group still have distribution gaps that are difficult to interpret. In this context, the present study tries to fill some of these gaps mentioned above and consists of four chapters. The first two chapters regarding hydroids. The first discussing the distribution patterns of some species, targeting the disruptive distributions revealed based on updated maps of distribution of these species. In subsequent chapter, models were developed to indicate areas with environmental conditions that are supposed to support the occurrence of the hydroid species discussed in the first chapter, both for present and for future projections. The third chapter discusses the disruptive dispersal in some Ctenophora species, not currently identified as bioinvaders, and the potential taxonomic implications. And finally, a chapter on the Rhodaliidae, that attempts to understand the distribution of current lineages by simulating the diversification of the group since the emergence of their common ancestor.

COMMITTEE MEMBERS:
Presidente - Interno ao Programa - 1834571 - OTTO MULLER PATRAO DE OLIVEIRA
Membro Titular - Examinador(a) Interno ao Programa - 1669156 - GUILHERME CUNHA RIBEIRO
Membro Titular - Examinador(a) Externo à Instituição - LUCÍLIA SOUZA MIRANDA
Membro Suplente - Examinador(a) Interno ao Programa - 1229106 - IVES HAIFIG
Membro Suplente - Examinador(a) Externo à Instituição - RENATO MITSUO NAGATA - FURG