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Roehampton University Research Repository > PhD Theses > PhD Theses > Temporal and spatial patterns of dipteran and collembolan abundance in a Nigerian tropical forest canopy

Please use this identifier to cite or link to this item: http://hdl.handle.net/10142/241572
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Title: Temporal and spatial patterns of dipteran and collembolan abundance in a Nigerian tropical forest canopy
Authors: Weaver, D.G.
Publisher: Roehampton University
Issue Date: 2011
URI: http://hdl.handle.net/10142/241572
Abstract: This study investigates the variation in the spatial patterns of Diptera and Collembola throughout the forest canopy due to seasonal changes in temperature and humidity in the monsoon climate of West Africa. There is a very distinct turnover in climate from the end of the dry season (the hottest and driest time of the year) to the beginning of the rains and this coincides with significant increases and decreases in the overall abundance of many forest dwelling Diptera and Collembola species. The study investigates spatial patterns on two gradients; vertically from the ground to the high canopy and laterally from the edge of the forest to the core, with the added complexity of the affects of anthropogenic burning of adjacent savannah. The results show that seasonality and the starting of the rains significantly affect both the overall abundance and the spatial patterns, providing species with a strategic change in habitat niche. During seasonal conditions that are less conducive to species' overall abundance, spatial patterns are suppressed by environmental conditions. However when environmental conditions are optimum for increased species abundance, spatial patterns are only suppressed by the availability of resources within the habitat (feeding or reproductive resources for example). Successive late burning events may have changed the structure of the forest edge introducing a significantly more open forest structure changing environmental conditions and thus creating a habitat more suitable for species which prefer lower humidity and higher temperatures.
Type: Thesis or dissertation
Keywords: temporal patterns
spatial patterns
diptera
collombolan
Nigeria
forests
Appears in Collections: PhD Theses

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