Zooplankton diversity in Acre state, Amazon, Brazil: an overview of previous studies

Larissa Araújo Dos Santos,André Ricardo Ghidini,Andressa Crystine Souza Da Silva,Pedro Paulo Pereira,Ronnilda Maria Gonçalves Araujo

doi:10.1590/1676-0611-bn-2020-1132

Larissa Araújo Dos Santos, André Ricardo Ghidini + Show 3 more

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https://doi.org/10.1590/1676-0611-bn-2020-1132

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Abstract

Abstract: This work assesses current knowledge of zooplankton biodiversity in aquatic ecosystems of the state of Acre (Brazil). A bibliographic survey was undertaken, showing that most of the reported studies have focused on zooplankton diversity and composition. Fifteen locations have been studied. There is still a scarcity of information concerning zooplankton populations in the Amazon region. To date, 170 species of planktonic rotifers have been recorded, distributed in 26 families and 38 genera, together with 18 species of cladocerans, distributed in 8 families and 18 genera, and 4 species of copepods in 2 families and 6 genera. The results indicate the need for further research concerning the biodiversity of this group of organisms at locations in the basins of the Purus and Juruá Rivers, especially in lotic ecosystems and littoral zones, given the present lack of information and the socioeconomic importance they play in the region.

Highlights

Biodiversity information is still incomplete for the majority of the aquatic systems in Brazilian Amazonia
The state of Acre lies in the Amazon basin and is rich in limnic environments, to date there have been only limited studies concerning the aquatic invertebrates present, with emphasis on the phylum Rotifera (Keppeler & Hardy 2004, Keppeler et al 2010, Santos Nascimento & Keppeler 2017), followed by the groups Cladocera and Copepoda (Keppeler 2003a, b, Nascimento & Keppeler 2017)
The findings indicate that Rotifera diversity is higher in lentic environments and lower in lotic environments

Summary

Introduction

Biodiversity information is still incomplete for the majority of the aquatic systems in Brazilian Amazonia. Despite presenting low abundance in relation to other groups in lentic environments, in lotic environments testaceous amoebae can act as protagonists in the environment, especially in streams (Araujo et al 2019). These groups are the main source of food for species, including fish, acting as a link between producers and consumers at higher levels in the food chain (Iskın et al 2020). These organisms, which play a fundamental role in nutrient cycling, are sensitive to environmental changes and have rapid responses, which can be used as indicators of the quality and trophic status of aquatic systems (Cardoso et al 2008, Pinheiro et al 2019, Karpowicz et al 2020)

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