2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/27/2021 | 2:00 PM - 3:30 PM | FROM AMERICA TO AFRICA: PILOTING OF THE BIOLOGICAL CONDITION GRADIENT TO EVALUATE THE EFFECTS OF REHABILITATION AND RESTORATION OF UPPER TANA RIVER IN KENYA | Virtual Platform
FROM AMERICA TO AFRICA: PILOTING OF THE BIOLOGICAL CONDITION GRADIENT TO EVALUATE THE EFFECTS OF REHABILITATION AND RESTORATION OF UPPER TANA RIVER IN KENYA
One motivation of using living organisms such as macroinvertebrates is their capacity to assess ecological conditions. This study employed macroinvertebrates attributes to a simple monitoring framework within the United States Environmental Protection Agency’s Biological Condition Gradient (BCG). BCG was piloted in Upper Tana River in Kenya with an aim of monitoring the effects of catchment restoration. Water quality parameters and invertebrate samples were collected from the runs and identified up to family level.
Using Principal Component Analysis (PCA) sites were grouped according to their water conditions. Macroinvertebrate assemblages in relation to ecological conditions were determined using Canonical Correspondence Analysis (CCA). The most significant factors influencing macroinvertebrates were elevation (F = 2.77, P= 0.01), conductivity (F = 1.94, P = 0.01) and discharge (F = 1.84, p = 0.04). All four CCA axes had a strong relationship between macroinvertebrates and water quality parameters (r = 0.87-0.94).
This pilot study in Kenya using macro invertebrates yielded promising results and was consistent with other studies carried elsewhere. The BCG model, showed the potential of identifying taxa indicating various ecological conditions that can be used as indicator taxa in the Upper Tana Rivers.
- Restoration
- Stream restoration
- Conservation
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Presenters/Authors
Laban Njoroge
(), National Museums of Kenya, Lnjoroge@museums.or.ke;
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