Browsing by Author "Ndibalema Vedasto Gabriel"

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    Ecological health assessment of Lukosi River using macroinvertebrate and riparian vegetation indicators in Iringa, Tanzania
    (Water Institute, 2025-12-30) Nyagongo Ahmad Adam; Ndibalema Vedasto Gabriel; Lalika Makarius Christian Sengilinga
    The health of river ecosystems is increasingly threatened by human activities such as agriculture, urbanization, and industrialization. This study evaluates the ecological status of the Lukosi River Catchment (LRC) in Kilolo District, Iringa, Tanzania, using macroinvertebrates and riparian vegetation as bioindicators. We employed a cross-sectional design, sampling at upstream, midstream, and downstream sites. Macroinvertebrates were collected via the kicking-bottom method and analyzed using the Shannon–Wiener diversity index and the Average Score Per Taxon (ASPT). Riparian vegetation was surveyed through belt transects and assessed by species distribution and proportional cover. Fourteen macroinvertebrate taxa were identified, dominated by water scavenger beetles and snails. Biodiversity was moderate (H′ ≈ 1.98). ASPT scores declined spatially: upstream (good quality), midstream (moderate), and downstream (poor), indicating worsening water quality downstream. The riparian zone was heavily modified: about 58% grasses, 28% shrubs, and 14% trees, reflecting human disturbance and land-use change. The results reveal progressive ecosystem degradation along the river, strongest downstream, likely driven by pollution and catchment alteration. These results call for integrated catchment management policies, stricter land-use regulation, and community-based riparian restoration programs to enhance water quality, biodiversity, and long-term ecological resilience of the LRC.
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    Ecological health assessment of lukosi river using macroinvertebrateandriparian vegetation indicators in Iringa, Tanzania
    (Water Institute, 2025-12-30) Nyagongo Ahmad Adam; Ndibalema Vedasto Gabriel; Lalika Makarius Christian Sengilinga
    The health of river ecosystems is increasingly threatened by human activities such as agriculture, urbanization, andindustrialization. This study evaluates the ecological status of the Lukosi River Catchment (LRC) in Kilolo District, Iringa, Tanzania, using macroinvertebrates and riparian vegetation as bioindicators. We employed a cross-sectional design, sampling at upstream, midstream, and downstream sites. Macroinvertebrates were collected via the kicking-bottommethodand analyzed using the Shannon–Wiener diversity index and the Average Score Per Taxon (ASPT). Riparian vegetationwas surveyed through belt transects and assessed by species distribution and proportional cover. Fourteenmacroinvertebrate taxa were identified, dominated by water scavenger beetles and snails. Biodiversity was moderate(H′ ≈1.98). ASPT scores declined spatially: upstream (good quality), midstream (moderate), and downstream(poor), indicatingworsening water quality downstream. The riparian zone was heavily modified: about 58% grasses, 28%shrubs, and14%trees, reflecting human disturbance and land-use change. The results reveal progressive ecosystemdegradationalongtheriver, strongest downstream, likely driven by pollution and catchment alteration. These results call for integratedcatchment management policies, stricter land-use regulation, and community-based riparian restoration programstoenhance water quality, biodiversity, and long-term ecological resilience of the LRC.