TCC - Bacharelado em Ciências Biológicas (Sede)
URI permanente para esta coleçãohttps://arandu.ufrpe.br/handle/123456789/412
Navegar
3 resultados
Resultados da Pesquisa
Item Efeitos do clima sobre padrões de tamanho corporal e riqueza de aranhas na Mata Atlântica(2019-12-03) Ariero, Gabriel Xavier Boldorini; Souza, Thiago Gonçalves; http://lattes.cnpq.br/0444294877812617; http://lattes.cnpq.br/2497460176058162What determines the distribution patterns of richness and morphological attributes of species have been studied for decades and most explanations are based on climatic gradients. However, to ectotherms, there is still controversy about the mechanisms that determine these patterns. Here we investigated how climate determines the body size and richness of spiders in the Atlantic Forest. Our hypothesis is that both temperature and precipitation affect both spider body-size and richness. We found a positive relationship between average body size of spiders and annual mean temperature and temperature seasonality. On the other hand, the same variables had a negative relationship with spider richness, while annual precipitation had a positive effect on richness. The negative relationship of temperature and richness denotes high sensitivity of the spiders to heat, which seems to limit the distribution of these ectotherms. Furthermore, larger spider species appear to occur at intermediate latitudes, where is warm and temperature varies considerably, unlike what is predicted for endotherms. Besides investigating the effects of climatic factors, we suggest future studies to assess the role of evolutionary processes when studying what determines spider body size distributions in the Atlantic Forest.Item Clima atual e passado como condutor da diversidade beta funcional e filogenética de aranhas ao longo do gradiente latitudinal(2018-02-26) Soares, Gabrielle Christina Firmino; Souza, Thiago Gonçalves; Oliveira, Gustavo Ribeiro de; http://lattes.cnpq.br/0444294877812617; http://lattes.cnpq.br/3342841776147612Climatic gradients can affect spatial and temporal distribution, as well as the morphological differentiation of organisms. The theory predicts that phylogenetically close species have larger body sizes in colder regions because of the need for heat storage; this explanation has been attributed to Bergmann's rule. However, the applicability of this rule to arthropods is still a challenge. Our objective was to test whether the spatial (over 2,000 km latitudinal gradient) and temporal (over 120,000 years) climate variability affect the phylogenetic and functional diversity of spiders. We used data from the literature (Gonçalves-Souza et al., 2014) that were collected in Restinga areas from southern Bahia to Santa Catarina in an extension of 12° 34'10 'at 27° 37'9' latitude. The functional attributes obtained were: height, length and width of the prossome and the length of the opistossoma. The phylogenetic tree was constructed from topologies at family and gender level. To test the effect of recent and past climate on functional and phylogenetic diversity, we used a Principal Coordinate Analysis (PCoA) combined with a Distance Based Redundancy Analysis (dbRDA) with the climate being the independent variable. Our results demonstrated that phylogenetically close spiders do not share similar morphological attributes (i.e., low phylogenetic signal). In addition, we found that stability favors the occurrence of smaller spiders. The maximum temperature of the hottest month of the past was the variable that most explained the variations of the functional and phylogenetic diversity of the spiders. The variables that indicate extreme temperature values and the annual precipitation of both the recent climate and the past were those that affected the body size most strongly. In this way, we can affirm that the seasonality and climatic extremes are dictating the variation of the body size and that this also reflects in the kinship relations of the spiders. Given the global climatic variations expected over the next 50 years, our results may help to understand possible future patterns of spatial distribution of arthropods.Item Relações ecológicas e evolutivas em Amblypygi (Chelicerata): em busca de padrões geográficos na variação do tamanho corporal em Charinidae(2019-12-03) Galvão, Gabriela Albuquerque; Souza, Thiago Gonçalves; Miranda, Gustavo Silva de; http://lattes.cnpq.br/3520462351528099; http://lattes.cnpq.br/0444294877812617; http://lattes.cnpq.br/0258597223548815