Valente D M P, Zenker M M, Teston J A
Programa de Pós-Graduação em Recursos Naturais da Amazônia, Univ Federal do Oeste do Pará, Santarém, Pará, Brasil.
Lab de Estudos de Lepidópteros Neotropicais, Univ Federal do Oeste do Pará, Rua Vera Paz, S/N, CEP: 68040-255, Campus Tapajós, Santarém, Pará, Brasil.
Neotrop Entomol. 2018 Dec;47(6):842-851. doi: 10.1007/s13744-017-0579-y. Epub 2018 Jan 6.
Biodiversity knowledge on insects is urgently needed due to the ever growing demand for food and the consequent deforestation process and loss of natural habitats in many understudied tropical regions. In this paper, we describe the outcome of a biodiversity research on tiger moths performed for the first time in a poorly studied Amazonian landscape-the savanna. We sampled tiger moths monthly with UV automatic light traps for 12 consecutive months in two sampling points in an area of savanna in eastern Amazon, and we compared our results to previously available data for eastern Amazon. We found a total of 91 species of which 80 were identified to species level. The most species-rich subtribes were Phaegopterina and Euchromiina with 32 species each. Species richness and abundance did not differ among sampling sites, but in general the species richness was higher during the dry season while abundance was higher during the wet season. This seasonal diversity pattern differs from the most common patterns recorded for savannas in other parts of the world. The species composition also changed in wet and dry seasons and correlated significantly with temperature and relative humidity. Our results suggest that the alpha diversity of the Amazonian savannas in our sampling area is lower than that in nearby rain forests and similar to that in agriculturally disturbed areas surrounded by rain forests. However, the species composition differed considerably from natural and disturbed areas. These results highlight the need of basic biodiversity surveys of insects in Amazonian savannas.
由于对食物的需求不断增长，以及随之而来的森林砍伐过程和许多研究不足的热带地区自然栖息地的丧失，昆虫生物多样性知识变得迫切需要。在本文中，我们描述了首次在研究较少的亚马逊景观——稀树草原上进行的虎蛾生物多样性研究的结果。我们在亚马逊东部稀树草原地区的两个采样点，用紫外线自动诱虫灯连续12个月每月对虎蛾进行采样，并将我们的结果与亚马逊东部先前可得的数据进行比较。我们总共发现了91个物种，其中80个已鉴定到物种水平。物种最丰富的亚族是Phaegopterina和Euchromiina，各有32个物种。采样地点之间的物种丰富度和丰度没有差异，但总体而言，物种丰富度在旱季较高，而丰度在雨季较高。这种季节性多样性模式不同于世界其他地区稀树草原记录的最常见模式。物种组成在干湿季节也有所变化，并且与温度和相对湿度显著相关。我们的结果表明，我们采样区域内亚马逊稀树草原的α多样性低于附近雨林的α多样性，与被雨林包围的农业干扰地区的α多样性相似。然而，物种组成与自然区域和干扰区域有很大差异。这些结果凸显了对亚马逊稀树草原昆虫进行基础生物多样性调查的必要性。
