Temporal and spatial patterns of dipteran and collembolan abundance in a Nigerian tropical forest canopy

Hdl Handle:
http://hdl.handle.net/10142/241572
Title:
Temporal and spatial patterns of dipteran and collembolan abundance in a Nigerian tropical forest canopy
Authors:
Weaver, D.G.
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.
Publisher:
Roehampton University
Issue Date:
2011
URI:
http://hdl.handle.net/10142/241572
Type:
Thesis or dissertation
Appears in Collections:
PhD Theses

Full metadata record

DC FieldValue Language
dc.contributor.authorWeaver, D.G.en_GB
dc.date.accessioned2012-09-05T14:12:03Z-
dc.date.available2012-09-05T14:12:03Z-
dc.date.issued2011-
dc.identifier.urihttp://hdl.handle.net/10142/241572-
dc.description.abstractThis 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.en_GB
dc.publisherRoehampton Universityen
dc.subjecttemporal patternsen_GB
dc.subjectspatial patternsen_GB
dc.subjectdipteraen_GB
dc.subjectcollombolanen_GB
dc.subjectNigeriaen_GB
dc.subjectforestsen_GB
dc.titleTemporal and spatial patterns of dipteran and collembolan abundance in a Nigerian tropical forest canopyen_GB
dc.typeThesis or dissertationen
dc.type.qualificationnamePhDen
dc.type.qualificationlevelDoctoralen
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