Spatio-temporal patterns of ground-dwelling ant assemblages in a lowland rainforest in southeast Cameroon |
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Authors: | I Deblauwe W Dekoninck |
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Institution: | (1) Center for Research and Conservation (CRC), Royal Zoological Society of Antwerp (RZSA), Koningin Astridplein 26, 2018 Antwerp, Belgium;(2) Department of Biology, University of Antwerp (UA), Universiteitsplein 1, 2610 Wilrijk, Belgium;(3) Royal Belgian Institute of Natural Sciences (RBINS), Vautierstraat 29, 1000 Brussels, Belgium |
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Abstract: | We studied the spatio-temporal patterns of ground-dwelling and -foraging ant assemblages in a continuous mixed secondary lowland
rainforest on the northern periphery of the Dja Biosphere Reserve in southeast Cameroon. The effect of season and of the interaction
of season with vegetation type on ant species density, activity and composition were investigated. We also checked for a possible
impact of army ant activity on the ant assemblage. Ants were collected by pitfall trapping in seven vegetation types in each
of three seasons during 12 months in 2003 and 2004–2005. Season significantly influenced the ground-dwelling ant assemblage.
The late wet season had the lowest ant species density and a different species composition than the early wet and the dry
season. Also inter-annual variation in ant species density and composition was detected and could partly be explained by an
influence of Dorylus activity. In general, vegetation type and inter-annual variation had a larger influence on the ground-ant assemblage than
season. Significant effects of interactions between season, year, vegetation type and army ants on the ant assemblage confirm
that also in African rainforests ant assemblages are extremely dynamic and depend on a complex combination of availability
of food resources, nest sites and predators.
Received 4 October 2006; revised 4 June 2007; accepted 2 July 2007. |
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Keywords: | Annual variation community structure Dorylus Formicidae season southeast Cameroon vegetation type |
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