Bird species diversity along the metropolitan stretch of River Kaduna amidst increasing anthropogenic activities

Agbo, B. O.*, Joseph, S. G., Zubairu, G. P. and Saleh, Y.

Keywords: Anthropogenic activities, Bird diversity, Land use/cover, River Kaduna.
Published in Volume 27
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Abstract:

The rate at which natural ecosystems are being replaced by urban environments is evolutionarily unprecedented. Over the past four decades, the city of Kaduna has undergone continuous structural reformation resulting from urban renewal projects. The influence of this trend on communities and populations of urban biota is an aspect of ecology that deserves exploration. River Kaduna originates from the Kaduna-Vom (K-Vom) on the Jos Plateau basin. Two kilometres transects in four purposively selected stations were marked along the metropolitan stretch of the River Kaduna to observe human activities and estimate environmental variables influencing bird population and were routinely surveyed over a four-month period (March to June 2019). The bird species and number of individuals were recorded, alongside environmental variables and associated anthropogenic activities. Additionally, satellite imagery was analyzed to account for spatial distributions of and extent of land-use/land-cover patterns across the study area. A total of 19, 056 individual birds were recorded, representing 115 species 52 families, with Shannon diversity index (H′) of 4.00. Bird-type associations relevant to habitats were categorized into aquatic (25%) and terrestrial (75%) birds. This study highlights that anthropogenic pressures and urbanization both have immediate and long-term impacts on birds and humans.