Poppe J L, Valente V L S, Schmitz H J
Univ Regional Integrada do Alto Uruguai e das Missões, Santo Ângelo, RS, Brasil.
Neotrop Entomol. 2013 Jun;42(3):269-77. doi: 10.1007/s13744-013-0125-5. Epub 2013 Mar 23.
Environmental variables such as temperature and rainfall can directly affect the community structure of dipterans. Seasonal oscillations in the abundance of species of Drosophilidae reflect differences in how tolerant populations are to climatic conditions. Over a period of 14 months, we collected samples in two habitats in the Pampa biome in the municipality of São Luiz Gonzaga, state of Rio Grande do Sul, Brazil (28°24'28″S, 54°57'39″W). The influence of environmental variables on populations of Drosophilidae was evaluated for both collecting sites by using correlation analysis. The results suggested a negative correlation between the abundances of Drosophila cardinoides Dobzhansky & Pavan, Drosophila maculifrons Duda, Drosophila melanogaster Meigen, Drosophila nigricruria Patterson & Mainland, and Zygothrica vittimaculosa Burla with temperature, which is reflected in the distribution of these species within Brazil. Our findings are important for characterizing and preserving biodiversity in this almost-unknown biome in southern Brazil given the current climate change scenario.
温度和降雨等环境变量会直接影响双翅目昆虫的群落结构。果蝇科物种丰度的季节性波动反映了种群对气候条件的耐受差异。在14个月的时间里，我们在巴西南里奥格兰德州圣路易斯贡萨加市潘帕生物群落的两个栖息地采集了样本（南纬28°24'28″，西经54°57'39″）。通过相关性分析评估了环境变量对两个采集地点果蝇科种群的影响。结果表明，卡氏果蝇、黄斑果蝇、黑腹果蝇、黑尾果蝇和 vittimaculosa 斑翅果蝇的丰度与温度呈负相关，这在这些物种在巴西的分布中得到体现。鉴于当前的气候变化情景，我们的研究结果对于表征和保护巴西南部这个几乎不为人知的生物群落中的生物多样性具有重要意义。
