Evaluating Soil Seed Bank Composition and Diversity in Selected Solid Waste Dumpsites in Port Harcourt, Nigeria

Abstract

The soil seed bank, floristic composition and diversity in selected solid waste dump sites located in Port Harcourt metropolis Rivers State, Nigeria were evaluated. The systematic sampling technique was employed and soil samples were collected at three stratified depths of 0-5 cm, 5-10 cm and 10-15 cm. The seedling emergence method was used for the soil seed bank analysis. The Shannon/Weiner diversity index was used for species diversity. Results revealed a total number of 36 species belonging to 21 families in the wet season while the dry season recorded 34 species belonging to 17 families. The Poaceae family dominated the soil seed bank in the dump sites and control for both seasons. There was no significant difference between the different dump sites studied. High seedling density recorded in the soil seed bank from the dumpsites indicated the rich nutrient level of the soil. There was significant difference in the seedling density down the soil profile; in the level of 0-5 cm > 5-10 cm > 10-15 cm depths. Hence, anthropogenic input as a result of solid wastes has altered the species composition and diversity in the dump sites.