Estrutura da comunidade de ninfas de Odonata em riachos de brejo de altitude no semiárido

Abstract

Studues on the structure of ecological community are extremely importante for the conservation of biodiversity. They are particularly importante in little-known areas and can assist in the development of strategies for the conservation of sprecies and ecosystems. The presente work had as main objective to carry out the survey of the abundance, richness and diversity of nymphs of Odonata in a stream located in a semiarid region. The study was carried out in the Poço da Laje Creek (Municipality of Triunfo, Sertão de Pernanbuco – Brazil), Pajeú River basin. The samples of Odonata were collected with the aid of network D in seven wells and seven stretches of current. In the laboratory, they were washed, sorted and identified for later evaluation of the richness, abundance and diversity of nymphs. The total richness of Odonata genera was 5, the abundance was 32 in wells and 39 in currents, the diversity in wells was 0.54 (± 0.52) and in current 0.76 (±0.44). Furthermore, it is possible to infer that there are two groups of sampling sites separated by the level of environmental quality. This study contributes to the recognition of the diversity of Odonata nymphs in streams located in high-altitude swamps in the semiarid region, which are poorly understood, and also contributes to the development of future biodiversity conservation actions.

Keywords: Dragonflies, Biodiversity, Conservation in Aquatic Ecosystems.