Banca de QUALIFICAÇÃO: JUCIELIA TENORIO JUSTINO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : JUCIELIA TENORIO JUSTINO
DATE: 03/03/2023
TIME: 09:00
LOCAL: Remoto através de plataforma google meet
TITLE:

Size spectra of freshwater nematode assemblages in springs under agriculture and pasture impacts

KEY WORDS:

human disturbances, morphometry, meiofauna, grain size

PAGES: 24
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUBÁREA: Ecologia Aplicada
SUMMARY:

Different impacts have been frequently occurring in river sources, such as
which are largely located in areas of human exploitation, as in
rural areas. Free-living nematodes are excellent bioindicators of disorders
environmental factors and their body size is a biological trait that may respond as
biotic and biological characteristics of ecosystems, being able to diagnose
different types of impact. Here, we investigate the size distribution of
Nematoda assemblages verifying relationships with environmental variables and
biological effects in springs close to cattle pasture and sugarcane cultivation. Testing the following hypotheses: i) The size distribution of
Freshwater nematode is similar to the proposal in the literature for marine environments and
estuaries; ii) body size and biomass of Nematoda respond to
physical-chemical and biological characteristics of the springs and iii) the size of the body and
Nematoda biomass is higher in impacted sites. The results found
indicate that the Nematoda from the springs presented values of length and
width considered high for freshwater environments, presenting a
bimodal size distribution, caused in two morphotypes, but in classes
of different size than that recorded for marine and estuarine environments. You
C/L ratio values were lower in springs with greater availability of
oxygen, but it was not possible to identify conditions of impact by activities of
pasture and sugarcane cultivation through variation in C/L values,
suggesting that perhaps this is not a good metric in detecting disturbances
humans in freshwater environments.
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BANKING MEMBERS:
Presidente - 1544255 - TACIANA KRAMER DE OLIVEIRA PINTO
Interno(a) - 1278133 - GUILHERME RAMOS DEMETRIO FERREIRA
Externo(a) à Instituição - ANDRE MORGADO ESTEVES - UFPE
Externo(a) à Instituição - GIOVANNI AMADEU PAIVA DOS SANTOS - UFPE