Banca de DEFESA: DARLISSON MESQUITA BATISTA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : DARLISSON MESQUITA BATISTA
DATE: 04/08/2023
TIME: 14:00
LOCAL: Google Meet
TITLE:

Phylogenetic structure of Amazonian ginger communities responds to edaphic and climatic gradients

KEY WORDS:

Zingiberales. Understory herbs. Evolutionary Ecology. Edaphic gradients. Climate gradients.

PAGES: 66
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUMMARY:

Observing and understanding how plant communities are assembled over a wide geographic space, taking into account a highly heterogeneous environment, which has been shown to be an extremely important factor in the origin and maintenance of ecological and evolutionary processes, will provide valuable information how to operate the assembly processes of communities. In this sense, we raise the following question: how do the local edaphic, climatic and hydrological gradients of the soil influence the patterns of the phylogenetic structure of the communities of the Zingiberales order throughout the entire Amazon region? For this, we downloaded occurrence data for Zingiberales throughout the entire Amazon region from the Global Biodiversity Information Facility (GBIF) and calculated the phylogenetic diversity metrics: Standardized effect size (SES) of mean pairwise distances (SES.MPD), mean nearest taxon distances (SES.MNTD) and Phylogenetic Diversity. And then we analyze the influence of edaphic, climatic and hydrological soil gradients on the patterns of the phylogenetic structure of the communities from the analysis of linear models. Thus, we observed that soil and climate affect the diversity and phylogenetic structure of communities. There are communities with higher SES.PD in regions where the soils are sandier and have a lower concentration of nitrogen and where the climate has less annual precipitation. We also observed an increase in phylogenetic grouping in regions with higher average annual temperature and more acidic soils (SES.MPD), and in regions with less sandy and clayey soils (SES.MNTD). The local hydrology condition did not significantly influence the phylogenetic relationships of plants in their communities. Therefore, we conclude that edaphic gradients strongly influence the diversity and phylogenetic structure of Zingiberales communities, both on a shallower (SES.PD) and deeper (SES.MPD) evolutionary time scale. Further reinforcing the importance of edaphic heterogeneity, which drives the distribution of floristic patterns in the Amazon region. In addition, we also emphasize the fact that our study covered a continental spatial scale and, probably thanks to this fact, we were able to identify the influence of the climate gradient on the phylogenetic structure of Amazonian herbaceous communities.

COMMITTEE MEMBERS:
Externo à Instituição - ALBERTO VICENTINI - INPA
Interno - ***.560.976-** - LEANDRO LACERDA GIACOMIN - UFPB
Interno - 1738813 - RODRIGO FERREIRA FADINI
Externo à Instituição - ÉCIO SOUZA DINIZ - UFV