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Title: Hydrochemistry and Diatom Assemblages on the Humpata Plateau, Southwestern Angola
Authors: Robakiewicz, Elena
de Matos, Daniela 
Stone, Jeffery R.
Junginger, Annett
Keywords: water quality; conductivity; algae; pH
Issue Date: 2021
Project: Leakey Foundation, Dissertation Fieldwork Grants 
The National Geographic Society, grant number EC-57233R-19 
Nicholas Conard under the Graduiertenförderung des Landes Baden-Württemberg 
Open Access Publishing Fund of University of Tübingen 
Serial title, monograph or event: Geosciences (Switzerland)
Volume: 11
Issue: 9
Abstract: Diatoms, a common siliceous alga, are effective paleoclimate and pollution indicators. They have been used in northern, eastern, and southern Africa as such because of well-documented ecologies of many taxa. In southwestern Africa, however, the country of Angola lacks similar modern assemblage studies. To close this gap, modern diatoms were sampled across four water bodies on the Humpata Plateau in southwestern Angola in the dry season of July 2019, with in-situ measurements of pH, conductivity, and total dissolved solids and laboratory analysis of cations and anions. This research concludes that bedrock determines local hydrochemistry. In addition, this exploratory study finds that diatoms in southwestern Angola can infer relative conductivities and trophic levels, but limited data hinder interpretations of diatom ecological preferences of pH, temperature, alkalinity, ions, and pollution, requiring further analyses. Such research is beneficial for both African diatomists interested in using accurate transfer functions across Africa to reconstruct paleoclimates as well as local communities and hydrologists interested in understanding water chemistry and pollution, given that these studied sites are vital water resources for local communities on the Humpata Plateau.
ISSN: 2076-3263
DOI: 10.3390/geosciences11090359
Rights: openAccess
Appears in Collections:I&D CGUC - Artigos em Revistas Internacionais

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