Banca de DEFESA: HANDRIA DE JESUS ARAUJO DA SILVA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : HANDRIA DE JESUS ARAUJO DA SILVA
DATA : 27/02/2019
HORA: 14:00
LOCAL: Instituto de Ciências Biológicas - UFPA
TÍTULO:

Ecological strategies CSR and functional attributes of woody species of restinga forest

PALAVRAS-CHAVES:

Morphophysiological traits. CSR Strategies. Restinga forest. Anatomy of wood

PÁGINAS: 52
GRANDE ÁREA: Ciências Biológicas
ÁREA: Botânica
RESUMO:

The ecological performance of a species in an ecosystem is related to its functional traits, which gives them the ability to grow, colonize, survive and reproduce in an environment through their strategies of acquisition, investment and resource use. In resource-poor environments with adverse environmental conditions, the plants present ecological strategies to optimize the acquisition and use of resources. The restinga is an environment with low availability of resources due to the sandy soils that have a low capacity of water and nutrients retention. Based on this, the objective of this work was to evaluate: i) which functional traits are most associated with the plants ecological strategies; ii) what CSR strategies are used by dominant species in restinga environments; iii) do the functional traits or percentage of CSR strategies explain species abundance. In order to answer these questions, we evaluated three sets of functional traits in nine (9) species with greater abundance in the studied area: leaf traits (specific leaf area - SLA, leaf dry mass content - LDMC e succulence - SUC), stem traits (wood density - WD, xylem vessel area- VA and vulnerability index - VI) and physiological (turgor loss point - ΨTLP, modulus of elasticity - Є and leaf capacitance - CFT). We tested if there were correlations between the analyzed attributes and if there were species groups based on their functional traits. We also calculated the relative proportions of CSR strategies using the StrateFy tool to our data set. The species of restinga forest, according to the CSR model, are highly stress tolerant (S / CS), some species are also competing (CS) and present different sets of attributes that influence their performance. In that, there is a variation from species with traits that guarantee a high environmental resistance, showing traits related to structural defenses (high LDMC and WD), to species that invest in attributes that guarantee higher capacity of water storage (high SUC and Є). Furthermore, there are species with a tendency to acquisitive strategies (high VA and SLA). The percentage of CSR did not explain the species abundance in restinga. Our results showed that despite the convergency in CSR strategies, there are a diversity of traits that give stress tolerance and competitive hability.

MEMBROS DA BANCA:
Externo à Instituição - BÁRBARA DUNCK OLIVEIRA - UFPA
Presidente - 079.651.076-86 - GRAZIELLE SALES TEODORO - UFPA
Interno - 6672321 - JOAO UBIRATAN MOREIRA DOS SANTOS
Externo à Instituição - MARKUS GASTAUER - ITV
Interno - 044.649.569-71 - THAÍSA SALA MICHELAN - UFPA