College of Natural Sciences (CoNAS)

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https://dissertations.mak.ac.ug/handle/20.500.12281/24

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Browsing College of Natural Sciences (CoNAS) by Subject "Abundance"
  • Item
    Assessing the impacts of surface properties of the catchment area on the biodiversity of the Nakivubo stream.
    (Makerere University, 2022-04-20) Kizza, Robinson
    Nakivubo stream is the main stormwater drainage channel for the city of Kampala whose level of urbanization interms of imperviousness is high,this greatly affects the water quality and macroinvertebrates with in the stream. In this study water samples and macroinvertebrates were collected from the paved and unpaved catchments and the results of this study indicated TDS range from 0.250 to 0.38 mg/l, EC range from 367.7to 546 µScm-sand DO range from 2.16 to 2.4mg/l. pH range from8.6 to 8.7 while temperature ranged from 23oC to 24oC. The results of Shannon Weinner diversity and Simpson’s diversity index shown a high diversity of macroinvertebrates in the unpaved catchments compared to the paved catchments. A correlation between the abundance of macroinvertebrates and the water quality parameters shown a positive relationship between temperature, ph and Oligocheata, a negative relationship between the other macroinvertebrates and all the water quality parameters. Stream water quality in the watershed is influenced by many factors such as meteorological conditions and anthropogenic activities, only considering the imperviousness can not perfectly represent the status of stream water quality with in the watershed
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    The diversity and abundance of butterflies in Ancra forest.
    (Makerere University., 2024-08-15) Ndagire, Shirah
    Forests provide critical habitats for tropical butterflies world-wide. However, habitat variation and disturbance within forests can affect butterfly communities and diversity in complex ways.Diversity of butterfly communities of Acrah forest, Mukono municipality, central Uganda was studied in four different habitat types (closed forest, open forest, forest edge, and scrubland) from 6th May to 7th June 2024. A total of 18 species belonging to three families were recorded. Descriptive statistics was used to present the data, while ANOVA with ukey posthoc tests were used to analyze the data. A total of 67 individual butterflies were caught using both sweep net and baited traps. Results showed a dominance of family Nymphalidae followed by Pieridae and Papilionidae. The results showed that butterfly diversity and abundance of Acrah forest is moderately low with a total diversity index (H=2.25). The closed forest had the highest butterfly diversity and abundance, whereas the scrubland showed the lowest butterfly diversity. Furthermore, the abundance of butterflies in Scrubland was significantly higher (p< 0.05) than other habitat types. Among all habitats surveyed, the closed forest represented the most suitable habitat for biodiversity conservation. The study demonstrates that closed forests are rich in butterfly diversity. Furthermore, an extensive inventory should be done to determine which species currently occupy Acrah forest and its surrounding landscapes to design appropriate conservation strategies.