2024-10-212024-10-212019MARTINS, Andreza Mesquita. A fauna de Collembola e caracterização química do solo em diferentes fitofisionomias no município de Santa Bárbara, Pará, Brasil. Orientadora: Ana Lúcia Nunes Gutjahr. 2019. 91 f. Dissertação (Mestrado em Ciências Ambientais) - Centro de Ciências Naturais e Tecnologia, Universidade do Estado do Pará, Belém, 2019.https://portaldaposgraduacao.uepa.br/handle/riuepa/221Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, CAPESAbertoBiodiversidadeFauna edáficaQualidade ambientalAmazôniaSolo - características - Santa Bárbara (PA)CollembolaFaunaFitofisionomiasBiodiversidadeQualidade ambientalBiodiversityEdaphic faunaEnvironmental qualityDissertaçãoCiências Agrárias::Agronomia::Ciência do Solo::Química do SoloThe Collembola are edaphic arthropods that have great importance in the nutrient cycling and their diversity and abundance can be used as bioindicators for soil quality. The present study aimed to determine the abundance and richness of Collembola fauna and soil chemical characteristics in three phytophysiognomies (Primary Forest, Monoculture of palm oil plantation and Agroforestry System), in the municipality of Santa Bárbara, Pará. Four field trips were conducted (two in the rainy season and two in the less rainy season). The samples were obtained through pitfall traps, arranged in two transects of 50 m, distant 10 m apart and totaling 144 samples. The samples were conserved in alcohol 70%, screening, quantification, and identification (at the family level) were conducted with a stereomicroscope. Soil samples were also collected for the chemical analyzes, which were obtained with a Dutch auger, between the two transects mentioned. For the chemical characterization, such as pH, Al, Ca, Mg, K, P, N, Corg, Fe, Cu, Zn, Mn, CTC, SB, organic matter (OM), Cmicrob., Hmicrob., and humidity was determined. Among the three phytophysiognomies, 86,770 specimens were sampled from 15 families, representing a considerable taxonomic diversity, since 19 families are registered in Brazil. In the rainy season, the primary forest had the highest abundance of Collembola (n = 19,245 specimens), while in the less rainy period palm oil plantation showed the highest abundance (n = 22,322 specimens). Among the families identified in the study, Paronellidae (n = 28,146), Isotomidae (n = 18,541) and Neanuridae (n = 13,757) were more representative. With regard to the chemical characteristics of the soil, it was verified a higher soil quality of the Forest during the rainy season, with increased humidity (30.82%), MO (46.75 g / kg), C (27.12 g / kg), N 2.04 g / kg), and CTC (12.90 mol / kg). In the less rainy period the palm oil plantation presented the best results for humidity (21.73 g/kg), MO (23.98 g/kg), C (13.74 g/kg), N (1.29 g/kg) microbial biomass (C= 421.12 mg/kg; N= 330.26 mg/kg). It was also observed a strong relation of the fauna of collembola with the chemical attributes of the soil, with emphasis on the Primary Forest that exerted greater influence on the population density of the families of Collembola when compared to the palm oil plantation and the Agroforestry System, indicating that the colembofauna is strongly influenced by the chemical attributes of the soil and the different phytophysiognomies. Thus it was evident, that the great variability of Collembola was due to environmental variations, which is evidenced by the changes in the distribution of the abundance and the diversity of families of collembolas, in relation to the characteristics of the soil, being able to infer that these animals serve as bioindicators of soil quality in different vegetable formations.PPGCA - Estudos de ecossistemas amazônicos