Bacharelado em Ciências Biológicas (Sede)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/5
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APP - Artigo Publicado em Periódico
TAE - Trabalho Apresentado em Evento
TCC - Trabalho de Conclusão de Curso
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5 resultados
Resultados da Pesquisa
Item Estrutura da comunidade meiofaunística de três praias rochosas de diferentes condições geográficas no Nordeste brasileiro(2019) Pereira, Maria Eduarda Oliveira; Rocha, Clélia Márcia Cavalcanti da; http://lattes.cnpq.br/8971495967943784; http://lattes.cnpq.br/4083542942187872The meiofauna is composed of marine organisms from 0.044 to 0.5mm in size and is tipically found in interstitial habitats. The composition of the meiofaunistic community is determined by size and type of sediment, as well as the geological, physical and chemical factors. These organisms are considered bioindicators due to their close relationship with the middle, wide distribution, rapid regeneration time and because they are organisms sensitive to environmental change. This work analyzed samples from the mid-coast and lower-mid-coast of Atalaia beaches, Archipelago Fernando de Noronha, Ilha do farol, Atol das Rocas and Muro Alto beach, in the southern coast of Pernambuco, aiming know and compare the meiofaunistic communities found in each beach. The material was treated at laboratory through routine techniques for the study of meiofauna, which was identified at high taxonomic levels. The main hypothesis of this work was that the meiofaunistic community found in the three beaches would be structurally similar, because they are characteristically rocky beach communities. With the results of the statistical analysis we saw that the meiofaunistic composition showed differences in diversity and species richness of each site studied, probably due to the different sediments types.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.Item Pode um processo de modificação de habitat alterar a comunidade da meiofauna? Estudo de caso de uma praia arenosa que sofreu um processo de engorda(2019) Cruz, Renata Carolina Maria da; Guilherme, Betânia Cristina; Silva Filho, Mário Guimarães da; http://lattes.cnpq.br/0770757545098826; http://lattes.cnpq.br/3131730022364100; http://lattes.cnpq.br/3354260053065916Sandy beaches are environments with a high biodiversity, presenting a fauna of invertebrates that are resistant and adapted to several adverse situations. The meiofauna is considered by metazoa that pass through the mesh of 0.5 mm of opening and are retained in a mesh of 0.044 mm. The objective of this work was to identify if the sandy beach ofPiedade-PE, which underwent a fattening process, has undergone a structural change in its meiofauna community. The animals of the meiofauna have a way of life adapted to the interstitial environment, and may vary according to the variation of the environment and grain size. The collections were made at Piedade beach before fattening, 1, 7, 15, 30, 60 and 90 days after sediment deposition, in the infralittoral and mediolittoral areas. The collection was performed during the low seas, where a transect perpendicular to the waterline was established and was extracted using a "corer" type sampler in the 10 cm of the sediment, three biosedimentological replicas and one for particle size analysis in the mediolittoral and infralittoral regions. The biosedimentological material was washed, elutrited, and taken to the stereomicroscope to count the meiofauna at the level of large groups. The sediment samples were processedusing a rot-up agitator. The PERMANOVA statistical test was used to verify if there was any change in the community after fattening. The meiofauna was composed of 17 taxa, the Nematoda group being the most abundant. Praia de Piedade underwent several changes in its structure, both in species richness and abundance. PERMANOVA's statistical test showedthat there are differences between the pre-and post-fattening community and that it tends to stabilize after 90 days of fattening may become similar to the meiofauna originally existing on the beach. Thus, the results indicate that after a fattening process the community will be modified.Item Efeitos de um processo de engorda de praia sobre a comunidade meiofaunística da zona entre-marés da praia de Candeias (Jaboatão dos Guararapes – PE)(2018) Sena, Luiz Felipe Valença Galiza; Rocha, Clélia Márcia Cavalcanti da; Santos, Érika Cavalcante Leite dos; http://lattes.cnpq.br/1552807658058972; http://lattes.cnpq.br/8971495967943784; http://lattes.cnpq.br/0088518530140540Marine erosion, which is characterized by the retreat of the coastline against the sea, promotes a significant loss of habitat for organisms inhabiting the intertidal zone. At various points along the coast of Pernambuco this erosion is already perceived at moderate to severe levels,and some actions have already been carried out to contain the retreat from the beach line. Recently, a process of containment of the marine erosion in the state of Pernambuco was carried out, aiming first at the most affected areas. This action provided, along a 5.5 km stretch,the widening of the sand strip of the beaches of Barra de Jangadas, Candeias and Piedade by a beach nourishment process. The sedimentary recomposition of these beaches was made through sand dredged from the continental shelf fromadepthof13m.Thisstudyanalyzedtheecologicalsuccessionof meiofaunal organisms (from 0.044 mm to 0.5 mm in size), and the sediments inwhich they live, in the beach of Candeias (Jaboatão dos Guararapes, PE) before and after a process of beach nourishment for up to 90 days after the process.These animals have a biology adapted to the interstitial environment, and can vary according to the variation of the nature and size of the grains. The collections were performed before the beach nourishment, 1 day after, 7, 15, 30, 60 and 90 days after sediment deposition, in the infralittoral and in the intertidal zone. The material was performed in the laboratory through routine techniques for the study of meiofauna, which was identified at high taxonomic levels. This work investigated the effects of this process on the meio fauna community of the beach and its ecological succession, dueto its close relationship with the sediments and their characteristics.It was verified that immediately aftert he process of beach nourishment the sediments were modified, and also the structure of the meio fauna community that colonizes them. This has undergone several changes in its structure, both in species richness and inabundance. Statistical tests showed a tendency to stabilize or even stabilize the community structure in a pattern that is significantly similar to the meiofauna originally existing on the beach. Thus, the results point to a possibility of using meiofauna in environmental biomonitoring programs for coastal engineering actions.