Dragonflies in the City: Diversity of Odonates in Urban Davao, Philippines

Earl Sunday Niya Perez, Majella G. Bautista
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引用次数: 6

Abstract

Dragonflies are well-known group of insects because of their biological and ecological importance in a community, that is, they indicate the environmental health of an ecosystem. However, in an urban ecosystem, there are many threats that can affect the assemblages of dragonfly species such as the intensification of urbanization which contributes biodiversity loss of most dragonfly species. This study aimed to identify dragonfly species and determine the species richness, relative abundance, species diversity, evenness and effective number of dragonflies in selected areas in Davao City. Opportunistic sampling using sweep net and photo documentation were used during the study. The sampling lasted for three months from June 2017 to August 2017. A total of 962 individuals of dragonflies were observed and recorded comprising of six species of dragonflies from six different genera of one family. Orthethrum sabina was the most abundant among the six species recorded in all sampling sites. The species richness was six. Low species diversity was obtained in all sampling which shows that the sites were not evenly distributed and indicating that the study sites were not diverse in terms of the number of species and highly disturbed.
城市中的蜻蜓:菲律宾达沃市区蜻蜓的多样性
蜻蜓是一种众所周知的昆虫,因为它们在一个群落中具有重要的生物学和生态学意义,也就是说,它们表明了一个生态系统的环境健康。然而,在城市生态系统中,许多威胁会影响蜻蜓物种的聚集,例如城市化的加剧导致大多数蜻蜓物种的生物多样性丧失。本研究旨在鉴定达沃市蜻蜓种类,并测定其种类丰富度、相对丰度、物种多样性、均匀度和有效数量。在研究过程中使用了扫描网和照片记录的机会性抽样。采样时间为2017年6月至2017年8月,为期3个月。共观察记录蜻蜓962只,隶属于1科6属6种。在所有样点记录到的6种植物中,北方蓟(Orthethrum sabina)数量最多。物种丰富度为6。所有样点的物种多样性都很低,表明样点分布不均匀,表明样点物种数量不丰富,受干扰程度高。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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