Alencar Jeronimo, Mello Cecilia Ferreira de, Morone Fernanda, Albuquerque Hermano Gomes, Serra-Freire Nicolau Maués, Gleiser Raquel M, Silva Shayenne Olsson Freitas, Guimarães Anthony Érico
J Am Mosq Control Assoc. 2018 Jun;34(2):85-92. doi: 10.2987/18-6739.1.
Members of the genera and are the most important biological vectors of the wild yellow fever virus (WYF) in the forested areas of the Americas. The ecologies of , , , and were studied in a forest of the Chapada dos Guimarães National Park, state of Mato Grosso, Brazil, to evaluate the influence of climatic factors (temperature and relative humidity [RH]) on their abundance. We also examined the association of climate with landscape structure on species distribution patterns throughout the seasons of the year. Multiple stepwise regressions showed that RH was most likely to influence the density of mosquito populations. A multidimensional scaling (MDS) was used to evaluate the effects of forest cover on the composition of mosquito populations at different radii (100-, 250-, and 1,000-m-radius buffer areas). The MDS provided 2 dimensions with values that indicated a higher similarity in the composition of culicid populations between sites 1 and 3, while site 2 was separate from the others in the ordination space. Site 2 had a much higher forest cover ratio at 100-m radius compared with sites 1 and 3. We found a possible relationship between the forest cover and the composition of the mosquito populations only in the 100-m radius. These results enabled us to infer that RH directly favored the activity of mosquito populations and that the forest cover located closest to the sampling site may influence the species composition. Since mosquito abundance was higher in the sites with lower local forest cover, forest fragmentation may be a key factor on the presence of WYF vector.
属和属的成员是美洲森林地区野生黄热病病毒（WYF）最重要的生物传播媒介。在巴西马托格罗索州瓜伊马雷斯国家公园的一片森林中，对、、和的生态进行了研究，以评估气候因素（温度和相对湿度[RH]）对其数量的影响。我们还研究了一年中不同季节气候与景观结构对物种分布模式的关联。多元逐步回归表明，相对湿度最有可能影响蚊虫种群密度。采用多维标度法（MDS）评估森林覆盖对不同半径（100米、250米和1000米半径缓冲区）蚊虫种群组成的影响。MDS提供了两个维度，其值表明第1和第3站点间库蚊种群组成的相似度更高，而在排序空间中第2站点与其他站点分开。与第1和第3站点相比，第2站点在100米半径处的森林覆盖率要高得多。我们仅在100米半径处发现了森林覆盖与蚊虫种群组成之间可能存在的关系。这些结果使我们能够推断，相对湿度直接有利于蚊虫种群的活动，且最靠近采样点的森林覆盖可能会影响物种组成。由于当地森林覆盖率较低的站点蚊虫数量较多，森林碎片化可能是野生黄热病病毒传播媒介存在的关键因素。
