Banca de DEFESA: CARLOS HENRIQUE SARAIVA DIAS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : CARLOS HENRIQUE SARAIVA DIAS
DATA : 20/02/2020
HORA: 09:00
LOCAL: PPG-CF
TÍTULO:

PLANT DIVERSITY MEASURES APPLIED TO DIFFERENTIATING TYPES OF LAND USE IN THE EASTERN AMAZON

PALAVRAS-CHAVES:

Conservation. Richness Estimators. Heterogeneity. Land use change. Uniformity.

PÁGINAS: 124
GRANDE ÁREA: Ciências Agrárias
ÁREA: Recursos Florestais e Engenharia Florestal
SUBÁREA: Conservação da Natureza
RESUMO:

Measuring diversity can assist in the assessment of human impacts and in conservation strategies in human-modified landscapes; the problem is that in addition to the costs involved in collecting data, the value of the diversity found often depends on the measure used and the response metrics, which makes it difficult to compare different communities. In this sense, this work aimed to evaluate measures of plant diversity to differentiate the vegetation cover of types of land use in the Eastern Amazon. The study was carried out in the municipalities of Acará, Bujaru, Tailândia and Tome-açu, in the region of Vale do Rio Acará. In this region, 20small family farmerswere chosen and in them plots were established where the vegetation cover was inventoried in the main types of land uses: forest, secondary forest, agroforestry systems, annual crops, oil palm plantations and pastures. The vegetation inventory was carried out in three vertical strata: upper, middle and lower. 36 diversity measures were calculated in each stratum, considering four categories of measures: richness, uniformity, heterogeneity and richness estimators. The methods of evaluating measures and comparing the types of uses varied according to the category of the measure. Not all measures are able to differentiate the vegetation cover found in the types of land uses, indicating that some uses have the same diversity; and, the measures that achieve this differentiation vary between strata. There is an increase in the number of measures that differentiate the types of uses from the lower layer (two measures) to the upper layer (26). Some measures are noteworthy for performing greater differentiation in two strata: ACE and Bootstrap (in the lower and upper strata), and Fisher's Alpha and Jacknife 2 (in the middle and upper strata). The strata showed different results, as distinct taxonomic groups. The standardized use of one of these measures must be a methodological principle to be followed, but the importance of choosing the diversity measure for the differentiation and ordering of communities is also very important, as the results vary between the measures and this leads to different results in the evaluation of species losses and, consequently, the conservation potential of a certain type of use.

MEMBROS DA BANCA:
Presidente - 1312312 - IZILDINHA DE SOUZA MIRANDA
Externo à Instituição - IMA CÉLIA GUIMARÃES VIEIRA - MPEG
Externo à Instituição - Joice Nunes Ferreira - EMBRAPA
Externo à Instituição - ROBERTA DE FÁTIMA RODRIGUES COELHO - IFPA