Sankarappan Anbalagan, Mani Kannan, Sundaram Dinakaran, Chelliah Balasubramanian, Muthukalingan Krishnan
Department of Zoology, Government Arts College (Affiliated to Madurai Kamaraj University), Melur, 625106, Madurai, Tamil Nadu, India.
Department of Zoology, Government Arts College (Affiliated to Madurai Kamaraj University), Melur, 625106, Madurai, Tamil Nadu, India.
Acta Trop. 2018 Jan;177:105-115. doi: 10.1016/j.actatropica.2017.09.030. Epub 2017 Oct 7.
Adult black flies (Simuliidae) are medically important insects and they are the sole vector of Onchocerca volvulus. Immature black flies are major components of aquatic macroinvertebrate assemblages in streams and play a vital role in nutrient dynamics. In this study, we examined effect of hierarchical dynamics (spatio-temporal pattern) on the distribution of immature black flies in South Indian streams. The sampling was done in streams of Western Ghats, South India. A total of 16 species belong to two subgenera: Simulium (10 species) and Gowmphostilbia (6 species) of Simulium were observed. Alpha diversity indices were analyzed, which indicate the abundance and species richness between sampling sites. Non-parametric analysis recognized the key environmental variables including latitude and stream order. Subsequently, the monsoon influences the larval assemblages and its association was high in leaf litter as revealed through statistical analyses. Although the members of the immature black fly assemblage with different environmental factors, they are very closely related to spatial and temporal organization and secondarily with other factors prevailing in streams.
成年黑蝇（蚋科）是具有重要医学意义的昆虫，它们是盘尾丝虫的唯一传播媒介。未成熟的黑蝇是溪流中水生大型无脊椎动物群落的主要组成部分，在营养动态中起着至关重要的作用。在本研究中，我们研究了层次动态（时空模式）对印度南部溪流中未成熟黑蝇分布的影响。采样在印度南部西高止山脉的溪流中进行。共观察到16个物种，分属于两个亚属：蚋属（10种）和蚋属的戈姆弗斯提尔比亚亚属（6种）。分析了α多样性指数，该指数表明了采样点之间的丰度和物种丰富度。非参数分析确定了包括纬度和溪流等级在内的关键环境变量。随后，通过统计分析发现季风影响幼虫群落，且其在落叶层中的关联度很高。虽然未成熟黑蝇群落的成员与不同环境因素有关，但它们与时空组织密切相关，其次与溪流中存在的其他因素有关。
