01. Universidade Federal Rural de Pernambuco - UFRPE (Sede)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/1
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Resultados da Pesquisa
Item Diversidade da comunidade associada à Carijoa riisei em naufrágios de diferentes profundidades em Pernambuco(2019-12-10) Oliveira, Camilla Silva de; Gomes, Paula Braga; http://lattes.cnpq.br/3289333472399959; http://lattes.cnpq.br/7484128728382844The octocoral Carijoa riisei is distributed in the Western Atlantic Ocean, Pacific, Caribbean and most recently in Mexico, it can be found at depths of more than 30 meters, including in Pernambuco shipwrecks. This species has an arborescent estolonial structure that provides a favorable environment for the development of various organisms, among which are macroinvertebrates, organisms of utmost importance for ecosystem processes. This work aims to investigate if the difference in depth between Pernambuco shipwrecks influences the fauna composition associated with C. riisei. The octocoral samples were collected in four Pernambuco shipwrecks located in the Pernambuco Artificial Shipwreck Park, in Recife, with different depths (between 20 and 30 meters), during the dry (December) and rainy (July) seasons of 2018, using SCUBA equipment. Later, in the laboratory, the colonies passed by washing processes and the macrofauna was retained in a 250 μm sieve, sorted, counted and identified to the smallest possible taxonomic group. In total, 3143 individuals associated with C. riisei were collected, distributed in 52 taxa. The Amphipoda and Polychaeta groups were the most representative in all shipwrecks, with a relative abundance of 66% (dominant taxon) and 22% (slightly rare taxon), respectively. The Taurus shipwreck had a higher species richness associated with the octocoral colonies than the other shipwrecks, especially during the rainy season. The composition of the associated fauna was different among the shipwrecks, but the difference in depth between the shipwrecks was not relevant for this differentiation. Therefore, other abiotic factors may have been responsible for this difference in species richness and composition among shipwrecks.Item A relação entre Carijoa riisei (Cnidaria, Octocorallia) e a comunidade da meiofauna com ênfase em nematoda em dois naufrágios do Atlântico Sul(2019-12-12) Silva, William Johnson da; Guilherme, Betânia Cristina; Gomes, Paula Braga; http://lattes.cnpq.br/3289333472399959; http://lattes.cnpq.br/3131730022364100; http://lattes.cnpq.br/1055946306253948This is the first study that sought to understand the influence that Carijoa riisei has on the meiofauna and nematode community, we start from the hypothesis that the colonies of this octocoral may increase the abundance and/or diversity of the meiofauna in comparison to areas without C.riisei. In addition, we believe that there is a difference in some trophic groups of the nematode community for a particular sedimentary or the structure of the octocoral. Our results indicated that there is a direct and significant relationship between the meiofauna community found in the sediment of the shiwrecks and that associated with the colonies of C. riisei, this pattern was also observed for nematode community. The highest values of abundance as well as diversity and evenness were observed in the octocoral community, it was also possible to verify significant difference between the dry and rainy periods. Trophic groups had a preference for certain habitat, and were also influenced by seasonal variation. In summary, from 839 individuals found, 652 were associated with the octocoral structure, and only 184 in the adjacent sediment. Future information regarding biogeographic patterns and migration indices may contribute significantly to a better understanding of the relationship between organisms as substrate and the fauna living within.