Banca de DEFESA: SUELEN NASCIMENTO DOS SANTOS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : SUELEN NASCIMENTO DOS SANTOS
DATE: 22/02/2022
TIME: 09:00
LOCAL: meet.google.com/otn-jfaq-ksz
TITLE:

Spatio-temporal meiofaunistic community structure in a hyporheic environment of the Beberibe river in Pernambuco.

KEY WORDS:

Ecology; Meiobenthos; Hyporheic zone; Water resources.

PAGES: 98
BIG AREA: Engenharias
AREA: Engenharia Sanitária
SUMMARY:

Water resources are increasingly being degraded and, together with this, public policies for water supply are driving the emergence of techniques that help in solving the water crisis. For the eligibility of some of these techniques, the study of the hyporheic zone of a river, for example, is essential to understand ecological aspects that influence the attenuation of contaminants, such as benthic organisms, also known as meiofauna, which inhabit the sedimentary interstice and collaborate in the water purification process. The hyporheic environment is the interface between the surface and subterranean environment, and its study is of fundamental importance in order to relate the meiofauna and its ecology, such as sedimentary preferences and distribution models, thus showing their diversity and abundance. The present work aimed to characterize the organisms of the hyporheic meiofauna and verify significant differences in their distribution between the period, point and depth factors. Sediments were collected in three replicates, in the dry and rainy periods, using a sampler subdivided into depths from 0 to 5 cm and 5 to 10 cm. Meiofauna organisms and deformed sediment samples were collected. Two sampling points were selected in different stretches of the Beberibe River in Pernambuco. Ponto 1 is located in an area with remnants of Mata Atlântica, while Ponto 2 is in a highly urbanized region. Abiotic parameters such as pH, temperature and salinity were also measured. A soil granulometric characterization, identification of organisms and diversity tests were carried out in order to understand the distribution of meiofauna. A bibliometric analysis was also carried out in order to demonstrate the little that has been published around the world about these freshwater benthic organisms. For this analysis, a bibliographic survey was carried out from the Web of Science (WoS) and SCOPUS databases, using the keywords "Meiofauna", "Meiobentos", "Hyperrheic Zone" and "Freshwater". The community structure results were presented through divisive hierarchical clusters using the Bray-Curtis distance, Ward clustering method and the ANOSIM test for clustering strength and significance. Principal Component Analysis (PCA) was performed to visualize the contribution of abiotic variables to the factors tested. 1, 2 and 3-way PERMANOVAs were also carried out, relating environmental variables and the climatic period and sampling point factors. The confidence interval adopted was 95% (p < 0.05). The results of the bibliometric analysis showed a total number of 28 documents concentrated mainly in Germany, the United Kingdom and the United States. The results regarding the structure of the meiofaunistic community showed that the composition of organisms varied significantly in the spaces (Point 1 and Point 2) and times (dry and rainy season) analyzed (p < 0.05), but no significant difference was seen for the depth factor (p > 0.05). 

BANKING MEMBERS:
Externo ao Programa - 3524096 - ANILDO MONTEIRO CALDAS
Presidente - 385000 - FERNANDO CARTAXO ROLIM NETO
Interno - 1743265 - VALMIR CRISTIANO MARQUES DE ARRUDA