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Biological water quality assessment in the degraded Mutara rangelands, northeastern Rwanda

Dusabe, M-C, Wronski, T, Gomes-Silva, G, Plath, M, Albrecht, C and Apio, A (2019) Biological water quality assessment in the degraded Mutara rangelands, northeastern Rwanda. Environmental Monitoring and Assessment, 191 (3). ISSN 0167-6369

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Abstract

Rwanda is a heavily overpopulated country that also suffers from overstocking with livestock, especially following the return of war refuges after the civil war (1991–1995). At present, approximately 20% of the human population in Nyagatare District in northeastern Rwanda has no access to clean drinking water and sanitation. We used a biotic index based on the presence of selected families of aquatic macroinvertebrates, derived from the “Tanzania River Scoring System” (TARISS), to assess water quality at N = 55 sites in the Mutara grasslands in Nyagatare District. Poor water quality became evident across most sampling sites both in the Muvumba (mean ± SE TARISS score 5.25 ± 0.10) and Karangazi Rivers (4.79 ± 0.12). Using a general linear model, we asked whether direct effects of land use forms and input of anthropogenic wastewater have an impact on water quality. Our results found no immediate effects of both forms of disturbance/pollution, probably because overall water quality was already poor. Our study is intended to serve as a starting point for continuous monitoring of water quality in the Mutara rangelands in NE Rwanda. The method applied here is cost-efficient, requires only basic equipment, and training local students to apply this technique can provide a solid basis for its implementation in future surveys related to public health.

Item Type: Article
Uncontrolled Keywords: Science & Technology; Life Sciences & Biomedicine; Environmental Sciences; Environmental Sciences & Ecology; Macrozoobenthos; Stream invertebrates; TARISS; Water safety; River pollution; Akagera ecosystem; BENTHIC MACROINVERTEBRATE ASSEMBLAGES; LAND-USE; INVERTEBRATE COMMUNITIES; FOREST STREAMS; RIVER; IMPACT; BIODIVERSITY; CONSERVATION; RESTORATION; WILDLIFE
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Q Science > QH Natural history > QH301 Biology
Divisions: Biological & Environmental Sciences (new Sep 19)
Publisher: Springer Verlag (Germany)
Related URLs:
Date Deposited: 02 Oct 2019 09:35
Last Modified: 02 Oct 2019 09:45
DOI or Identification number: 10.1007/s10661-019-7226-5
URI: http://researchonline.ljmu.ac.uk/id/eprint/11434

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