Banca de DEFESA: DOMINGOS LUCAS DOS SANTOS SILVA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : DOMINGOS LUCAS DOS SANTOS SILVA
DATA : 21/09/2021
HORA: 08:00
LOCAL: Google Meet
TÍTULO:

Biogeography and ecology of ferns in rocky environments of South Amazon

PALAVRAS-CHAVES:

Arc of deforestation; phytogeography; ecological niche models; CerradoAmazonia transition area

PÁGINAS: 133
GRANDE ÁREA: Ciências Biológicas
ÁREA: Ecologia
SUBÁREA: Ecologia de Ecossistemas
RESUMO:

Ferns are associated with humid environments, but they can colonize rocky environments due to the large adaptive plasticity of this group. In this study, we examined floristics, biogeography and conservation issues, and we projected the potential effects of climate change on geographic distribution of ferns from rocky environments collected in plots of 1-ha in rocky outcrops of the Southern Amazon and the contact region between the Amazon and Cerrado domains, Brazil. Considering the sampled species, we compiled their occurrences and conservation attributes from online databases. We predicted the impact of climate change on future (until 2070) potential distribution using eight algorithms, which are based on regression, machine learning, and distance and bioclimatic envelope. We showed that the Pteridaceae family and the Anemia genus (Anemiaceae) seem to be characteristic of rocky environments of the Southern Amazon and in the contact region between the Amazon and Cerrado domains, as they are the most representative taxa. The sampled species have a wide distribution and two are restricted to Brazil. Among the taxa identified, two are classified as “Least Concern” and one as “Vulnerable”; In turn, the other taxa do not have enough data to be included in any conservation category, and such taxa were evaluated by using the extent of occurrence and the area of occupation. We also showed that in future climatic conditions, potential changes will negatively influence the distribution of fern species, with wide or low distribution in the Neotropical region. However, not all fern species will respond similarly. Changes in potential species distribution areas are projected to occur in all sub-regions and transition areas of the Neotropics, as well as in the Amazon and in the transition area between the Amazon and the Cerrado. The potential distribution of some species will become fragmented and with abrupt decline of suitability areas between the current and predicted climate by 2070. Areas with maximum suitability for fern species in the Neotropical region will be essentially restricted to Panama; in the Amazon and Brazilian Cerrado-Amazon transition area, maximum suitability may be restricted to the northern and northeastern regions, respectively. The distribution ranges of fern species imply impacts on the functioning, resilience and structure of the ecosystem and on the diversity of ferns in the Neotropical region.

MEMBROS DA BANCA:
Presidente - 253812001 - PEDRO VASCONCELOS EISENLOHR
Interno - 132029001 - EDDIE LENZA DE OLIVEIRA
Externo ao Programa - 75201005 - LUCIENE CASTUERA DE OLIVEIRA
Externo à Instituição - GISELI AREIAS NÓBREGA - UNICAMP
Externo à Instituição - ROZIJANE FERNANDES OTTONI - UFMA