Study on Insect Diversity of Ankorcha Forest and Sheger Public Park in Wet and Dry Seasons in Addis Ababa
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Date
2009-09
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Addis Ababa University
Abstract
A study on insect biodiversity was carried out in Addis Ababa in Ankorcha forest and
Sheger Park. Different parameters such as diversity index, species richness, frequency,
abundance, distribution were measured. Sampling was done using sweeping net from different
microhabitats of each ecological setting. In the forest, the presence of eighteen families of insects
which belong to six orders were observed. In the park, twenty-five families of families of insects
which belong to seven orders were recorded. Order Diptera was found to be the dominating order
in both settings.
In Ankorcha forest, highest diversity of insects was observed in the natural forest habitat in
all seasons. In the wet season, the best even distribution of insects was observed in the grass land
habitat. But, in the dry season insects were best evenly distributed in the artificial forest habitat.
In Sheger Park, the highest diversity of insects was observed in the mixed vegetation habitat.
Insects were best evenly distributed in the flowers and grass mixed habitat in the wet season. But
in the dry season, grassland habitat was the best habitat regarding even distribution of insects. In
Ankorcha forest, the most similar habitats in the distribution of insects in both the wet and dry
season were natural forest and grassland habitat. In Sheger park, the highest similarity of insects
was seen in flowers and grass mixed habitats and mixed vegetation habitat in all seasons. In
Ankorcha forest, the highest habitat association was observed in the artificial forest habitat. In
Sheger Park, the grassland habitat was the habitat which showed the highest habitat association.
The t-test result of the comparison of insect abundance in wet and dry seasons of both Ankorcha
forest and Sheger Park showed significance difference. But when insect abundance of Sheger
Park and Ankorcha forest were compared during the respective wet season and dry season no
significant difference were observed.
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Biology