Bacharelado em Ciências Biológicas (Sede)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/5
Siglas das Coleções:
APP - Artigo Publicado em Periódico
TAE - Trabalho Apresentado em Evento
TCC - Trabalho de Conclusão de Curso
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2 resultados
Resultados da Pesquisa
Item Composição da nematofauna em uma praia urbana tropical impactada por efluentes de esgoto(2022-10-07) Bezerra, Pâmela da Silva; Guilherme, Betânia Cristina; Silva Filho, Mário Guimarães da; http://lattes.cnpq.br/0770757545098826; http://lattes.cnpq.br/3131730022364100; http://lattes.cnpq.br/7169142852187773Sandy beaches have complex hydrodynamic processes and they are widely used for tourism and recreation. The interstitial space provides habitat for organisms of the Phylum Nematoda, considered the most abundant in unconsolidated bottom benthic ecosystems. The distribution tends to suffer interference, mainly, from granulometry, in addition to other factors. The present study investigated the nematofauna composition on a tropical urban beach impacted by sewage effluents, to test two hypotheses: 1) the structure of the nematofauna community is influenced by granulometric characteristics and 2) the nematofauna composition on the beach of Barra de Jangada presents temporal differences, considering the trophic groups and maturation stages. The collections were carried out in the months of July (rainy season) and September (dry season) of 2020. In each one, two transects were established, one of them located close to a sewage along the intertidal zone and the other distant at 100 meters. In each transect, four sampling points were marked, then biosedimentological replicas and for granulometric analysis were collected. Samples were screened and nematodes identified at the genus level. The sediment was predominantly classified as moderately well sorted fine sand. We recorded 42 genera, belonging to 20 families, Xyalidae being the most representative, with greater abundance and richness of genera. The genera Promonhystera, Theristus, Mesacanthion, Paracanthonchus and Pseudosteineria represented more than 90% of the samples. The greatest richness found occurred in the dry season and, considering the transects, the first one showed greater diversity. The upper midlittoral region had the lowest diversity between the zones in both months. PERMANOVA indicated significant differences in communities and DistLM showed that granulometry significantly influences community composition. The most abundant trophic group was non-selective deposit eaters. Juveniles were dominant in the both periods.Item Nematoda de praias arenosas: o que os pesquisadores estão estudando?(2022-06-09) Silva Filho, Leonele Menezes da; Guilherme, Betânia Cristina; Cidreira Neto, Ivo Raposo Gonçalves; http://lattes.cnpq.br/5326095246015406; http://lattes.cnpq.br/3131730022364100; http://lattes.cnpq.br/4660128951448062This work is a systematic review of the literature with emphasis on the occurrence of Nematoda on sandy beaches around the world, seeking to relate its abundance with abiotic factors, verifying the most expressive families in the selected works. To obtain the data, the online databases Science direct, SCIELO and CAPES were used with the following keywords: Sandy beach+nematoda+meiofauna and nematoda+meiofauna, with no restriction on the year of publication of the articles. 161 articles were selected from a total of 1,747 and after the screening process, 77 articles were selected using the PRISMA method. The BioEstat program version 5.0 was used to create the graphics, and IRAMUTEQ was used to verify similar word classes in the abstracts of the articles, in order to find a pattern of how words occur in the proposed Nematoda theme on sandy beaches. We found 22 families belonging to the orders Desmodorida, Enoplida, Monhysterida,Chromadorida, Araeolaimida, Desmoscolecida, Triplonchida. Of the families found in the different orders, the most representative was Xyalidae, which had values of abundance in sediment environments classified as fine. The abiotic parameters that were most recorded in the articles in relation to water were salinity (n=32) and temperature (n=17), while in the sediment, granulometry obtained 59 occurrences and organic matter with 31, respectively. Thus, we consider that Nematoda are limited to dispersion and their distribution is directly influenced by environmental conditions, since the environmental variables that most explained the distribution and density patterns were granulometry, food and dissolved oxygen. We emphasize that even with the data recorded from such environmental variables, it is necessary to understand that the distribution and/or diversity of Nematoda may be linked to sets of factors. The results of the systematic review come to reverberate in different ways for researchers to select their sampling methods for future research on sandy beaches, at the time of the in situ collection of the Nematoda group.