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Bird species richness and diversity responses to land use change in the Lake Victoria Basin, Kenya. | LitMetric

AI Article Synopsis

  • * A study in the Lake Victoria Basin in Kenya found that areas affected by land use changes, such as urban development and agriculture, had significantly lower bird species richness and diversity compared to natural landscapes, with certain bird guilds disappearing entirely.
  • * The findings highlight the importance of incorporating conservation strategies into land use planning to protect essential habitats and maintain biodiversity, especially for non-migratory bird species that are more vulnerable to habitat alteration.

Article Abstract

The increasing demand for cultivated lands driven by human population growth, escalating consumption and activities, combined with the vast area of uncultivated land, highlight the pressing need to better understand the biodiversity conservation implications of land use change in Sub-Saharan Africa. Land use change alters natural wildlife habitats with fundamental consequences for biodiversity. Consequently, species richness and diversity typically decline as land use changes from natural to disturbed. We assess how richness and diversity of avian species, grouped into feeding guilds, responded to land use changes, primarily expansion of settlements and cultivation at three sites in the Lake Victoria Basin in western Kenya, following tsetse control interventions. Each site consisted of a matched pair of spatially adjacent natural/semi-natural and settled/cultivated landscapes. Significant changes occurred in bird species richness and diversity in the disturbed relative to the natural landscape. Disturbed areas had fewer guilds and all guilds in disturbed areas also occurred in natural areas. Guilds had significantly more species in natural than in disturbed areas. The insectivore/granivore and insectivore/wax feeder guilds occurred only in natural areas. Whilst species diversity was far lower, a few species of estrildid finches were more common in the disturbed landscapes and were often observed on the scrubby edges of modified habitats. In contrast, the natural and less disturbed wooded areas had relatively fewer estrildid species and were completely devoid of several other species. In aggregate, land use changes significantly reduced bird species richness and diversity on the disturbed landscapes regardless of their breeding range size or foraging style (migratory or non-migratory) and posed greater risks to non-migratory species. Accordingly, land use planning should integrate conservation principles that preserve salient habitat qualities required by different bird species, such as adequate patch size and habitat connectivity, conserve viable bird populations and restore degraded habitats to alleviate adverse impacts of land use change on avian species richness and diversity.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10798997PMC
http://dx.doi.org/10.1038/s41598-024-52107-2DOI Listing

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