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Reduced abundance of late-successional trees but not of seedlings in heavily compared with lightly logged sites of three East African tropical forests

Published online by Cambridge University Press:  30 July 2010

Jasper Mbae Kirika
Department of Ornithology, National Museums of Kenya, Nairobi, Kenya Institut für Zoologie, Abt. V. – Ökologie, Johannes-Gutenberg Universität Mainz, Becherweg 13, 55128 Mainz, Germany
Katrin Böhning-Gaese
Johann Wolfgang Goethe Universität, Department of Biological Sciences, Siesmayerstr. 70, D-60323 Frankfurt (Main), Germany Biodiversity and Climate Research Centre (BiK-F), Senckenberganlage 25, D-60325 Frankfurt (Main), Germany
Bonny Dumbo
P.O. Box 143, Kakamega, Kenya
Nina Farwig*
Department of Ornithology, National Museums of Kenya, Nairobi, Kenya Institut für Zoologie, Abt. V. – Ökologie, Johannes-Gutenberg Universität Mainz, Becherweg 13, 55128 Mainz, Germany
1Corresponding author. Email: Present address: Dept. Ecology – Conservation Ecology, Faculty of Biology, Philipps-Universität Marburg, Karl-von-Frisch-Str. 8, 35032 Marburg, Germany.


Logged forests form an increasingly large proportion of tropical landscapes but disproportionately few studies have studied the impact of forest disturbance, e.g. lightly vs. heavily logged, on tree and seedling communities simultaneously. We sampled all trees (on 1 ha) and all recently germinated seedlings (on 90 m2) in three lightly and three heavily logged sites in each of the following three East African tropical forests: Budongo Forest and Mabira Forest in Uganda and Kakamega Forest in Kenya. We analysed species richness, diversity, abundance and community composition of late- and early-successional trees and seedlings. We recorded no difference in species richness or diversity of late-successional or early-successional trees between lightly and heavily logged sites. However, the abundance of late-successional species was lower in heavily than lightly logged sites. Moreover, there was no difference in species richness or diversity of trees among the three forests. Yet, abundances of late-successional trees were higher in Budongo Forest than in Mabira Forest and Kakamega Forest. Species richness, diversity and abundance of seedlings did not differ between lightly and heavily logged sites. Only the abundance of seedlings of late-successional species differed among the forests with more individuals in Budongo Forest than in Mabira Forest. This was corroborated by non-metric multidimensional scaling (NMDS) showing clear differences in composition of tree and seedling communities among the three forests. Thus, both, the tree and seedling communities differed significantly among the three forests but not between lightly and heavily logged sites.

Research Article
Copyright © Cambridge University Press 2010

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ALTHOF, A. 2005. Human impact on flora and vegetation of Kakamega Forest, Kenya. Ph.D. dissertation, University of Koblenz-Landau.Google Scholar
BARANGA, D. 2007. Observations on resource use in Mabira Forest Reserve, Uganda. African Journal of Ecology 45:26.CrossRefGoogle Scholar
BEENTJE, H. 1994. Kenya's trees, shrubs and lianas. National Museums of Kenya, Nairobi, Kenya. 722 pp.Google Scholar
BLEHER, B., USTER, D. & BERGSDORF, T. 2006. Assessment of the threat status and management effectiveness in Kakamega Forest, Kenya. Biodiversity Conservation 15:11591177.CrossRefGoogle Scholar
BOFFA, J.-M., KINDT, R., KATUMBA, B., JOURGET, J.-G. & TURYOMURUGYENDO, L. 2008. Management of tree diversity in agricultural landscapes around Mabira Forest Reserve, Uganda. African Journal of Ecology 46:2432.CrossRefGoogle Scholar
CHAPMAN, C. A. & CHAPMAN, L. J. 1997. Forest regeneration in logged and unlogged forests of Kibale National Park, Uganda. Biotropica 29:396412.CrossRefGoogle Scholar
EGGELING, W. J. 1947. Observations on the ecology of the Budongo rainforest, Uganda. Journal of Ecology 34:2087.CrossRefGoogle Scholar
ELLISON, A. M., DENSLOW, J. S., LOISELLE, B. A. & BRENES, M. D. 1993. Seed and seedling ecology of neotropical Melastomataceae. Ecology 74:17331749.CrossRefGoogle Scholar
FARWIG, N., BÖHNING-GAESE, K. & BLEHER, B. 2006. Enhanced seed dispersal of Prunus africana in fragmented and disturbed forests. Oecologia 147:238252.CrossRefGoogle ScholarPubMed
FARWIG, N., SAJITA, N., SCHAAB, G. & BÖHNING-GAESE, K. 2008a. Human impact diminishes seedling species richness in Kakamega Forest, Kenya. Basic and Applied Ecology 9:383391.CrossRefGoogle Scholar
FARWIG, N., BRAUN, C. & BÖHNING-GAESE, K. 2008b. Human disturbance reduces genetic diversity of an endangered tropical tree, Prunus africana (Rosaceae). Conservation Genetics 9:317321.CrossRefGoogle Scholar
HALL, J. S., HARRIS, D. J., MEDJIBE, V. & ASHTON, P. M. S. 2003. The effects of selective logging on forest structure and tree species composition in a Central African forest: implications for management of conservation areas. Forest Ecology and Management 183:249264.CrossRefGoogle Scholar
HAMILTON, M. B. 1991. Uganda forest trees. Makerere University Press, Kampala, Uganda. 279 pp.Google Scholar
HAMPE, A. 2008. Fruit tracking, frugivore satiation, and their consequences for seed dispersal. Oecologia 156:137145.CrossRefGoogle ScholarPubMed
HARMS, K. E., WRIGHT, S. J., CALDERÓN, O., HERNÁNDEZ, A. & HERRE, E. A. 2000. Pervasive density-dependent recruitment enhances seedling diversity in a tropical forest. Nature 404:493495.CrossRefGoogle Scholar
HERRERÍAS-DIEGO, Y., QUESADA, M., STONER, K. E. & LOBO, J. A. 2006. Effects of forest fragmentation on phenological patterns and reproductive success of the tropical dry forest tree Ceiba aesculifolia. Conservation Biology 20:11111120.CrossRefGoogle ScholarPubMed
HOWARD, P. C. 1991. Nature conservation in Uganda's tropical forest reserves. IUCN, Gland. 313 pp.Google Scholar
HUBBELL, S. P., FOSTER, R. B. & O'BRIEN, S. T. 1999. Light-gap disturbances, recruitment limitation, and tree diversity in a neotropical forest. Science 283:554557.CrossRefGoogle Scholar
HURLBERT, S. H. 1971. The nonconcept of species diversity: a critique and alternative parameters. Ecology 52:577586.CrossRefGoogle ScholarPubMed
HURTT, G. C. & PACALA, S. W. 1995. The consequences of recruitment limitation: reconciling chance, history and competitive differences between plants. Journal of Theoretical Biology 176;112.CrossRefGoogle Scholar
KARIUKI, M. & KOOYMAN, M. R. 2005. Floristic changes and regeneration patterns for a 12-year period during the 3rd and 4th decades following selection logging in a subtropical rainforest. Austral Ecology 30:844855.CrossRefGoogle Scholar
KIRIKA, J. M., FARWIG, N. & BÖHNING-GAESE, K. 2008a. Local disturbance of tropical forests diminishes frugivores and seed removal of a small-seeded Afrotropical tree. Conservation Biology 22:318328.CrossRefGoogle Scholar
KIRIKA, J. M., BLEHER, B., BÖHNING-GAESE, K., CHIRA, R. M. & FARWIG, N. 2008b. Fragmentation and local disturbance of forests reduce frugivore diversity and fruit removal in Ficus thonningii trees. Basic and Applied Ecology 9: 663672.CrossRefGoogle Scholar
KOKWARO, J. O. 1988. Conservation status of the Kakamega Forest in Kenya. The Eastern most relic of the equatorial rainforest of Africa. Monographs in Systematic Botany from the Missouri Botanical Garden 25;471489.Google Scholar
LAURANCE, W. F. & BIERREGAARD, R. O. (eds) 1997. Tropical forest remnants: ecology, management, and conservation of fragmented communities, University of Chicago Press, Chicago. 616 pp.Google Scholar
LAURANCE, W. F., FERREIRA, L. V., RANKIN-DE MERONA, J. M., LAURANCE, S. G., HUTCHINGS, R. & LOVEJOY, T. E. 1998. Effects of forest fragmentation on recruitment patterns in Amazonian tree communities. Conservation Biology 12;460464.CrossRefGoogle Scholar
LAURANCE, W. F., OLIVEIRA, A. A., LAURANCE, S. G., CONDIT, R., NASCIMENTO, H. E. M., SANCHEZ-THORIN, A. C., LOVEJOY, T. E., ANDRADE, A., D'ANGELO, S., RIBEIRO, J. E. & DICK, C. W. 2004. Pervasive alteration of tree communities in undisturbed Amazonian forests. Nature 428:171175.CrossRefGoogle ScholarPubMed
LAURANCE, W. F., NASCIMENTO, H. E. M., LAURANCE, S. G., ANDRADE, A. C., FEARNSIDE, P. M., RIBEIRO, J. E. L. & CAPRETZ, R. L. 2006. Rain forest fragmentation and the proliferation of successional trees. Ecology 87:469482.CrossRefGoogle ScholarPubMed
LAWTON, R. O. & PUTZ, F. E. 1988. Natural disturbance and gap phase regeneration in a wind exposed tropical cloud forest. Ecology 69:754777.CrossRefGoogle Scholar
LEHOUCK, V., SPANHOVE, T., GONSAMO, A., CORDEIRO, N. & LENS, L. 2009. Spatial and temporal effects on recruitment of an Afromontane forest tree in a threatened fragmented ecosystem. Biological Conservation 142:518528.CrossRefGoogle Scholar
LEWIS, S. L. 2006. Tropical forests and the changing earth system. Philosophical Transactions of the Royal Society London B 361:195210.CrossRefGoogle ScholarPubMed
LUNG, T. & SCHAAB, G. 2006. Assessing fragmentation and disturbance of west Kenyan rainforests by means of remotely sensed time series data and landscape metrics. African Journal of Ecology 44:491506.CrossRefGoogle Scholar
LWANGA, J. S. 2003. Forest succession in Kibale National Park Uganda; implications for forest restoration and management. African Journal of Ecology 4:922.CrossRefGoogle Scholar
MAGNUSSON, W. E., DE LIMA, O. P., REIS, F. Q., HIGUCHI, F. N. & RAMOS, J. F. 1999. Logging activity and tree regeneration in an Amazonian forest. Forest Ecology and Management 113:6774.CrossRefGoogle Scholar
MAKANA, J. & THOMAS, J. C. 2004. Dispersal limits the natural recruitment of African mahoganies. Oikos 106:6772.CrossRefGoogle Scholar
MAKANA, J. & THOMAS, J. C. 2005. Effects of light gaps and litter removal on seedling performance of six African timber species. Biotropica 37:227237.CrossRefGoogle Scholar
MARTIN, P. H., SHERMAN, R. E. & FAHEY, T. J. 2004. Forty years of tropical forest recovery from agriculture: structure and floristics of secondary and old growth riparian forests in the Dominican Republic. Biotropica 36:297317.Google Scholar
MARTÎNEZ-RAMOS, M. & SOTO-CASTRO, A. 1993. Seed rain and advanced regeneration in a tropical rain forest. Vegetatio 108:299318.Google Scholar
MCCUNE, B. & GRACE, J. B. 2002. Analysis of ecological communities. MjM Software, Gleneden Beach. 304 pp.Google Scholar
MWIMA, P. M., OBUA, J. & ORYEM-ORIGA, H. 2001. Effect of logging on the natural regeneration of Khaya anthotheca in Budongo Forest Reserve, Uganda. International Forestry Review 3:131135.Google Scholar
NASCIMENTO, H. E. M., ANDRADE, A. C. S., CAMARGO, J. L. C., LAURANCE, W. F., LAURANCE, S. G. & RIBEIRO, J. E. L. 2006. Effects of the surrounding matrix on tree recruitment in Amazonian forest fragments. Conservation Biology 20:853860.CrossRefGoogle ScholarPubMed
NAIDOO, R. 2004. Species richness and community composition of songbirds in a tropical forest-agricultural landscape. Animal Conservation 7:93105.CrossRefGoogle Scholar
PERES, C. A. & VAN ROOSMALEN, M. 2002. Primate frugivory in two species-rich Neotropical forests: implications for the demography of large-seeded plants in overhunted areas. Pp. 407421 in Levey, D., Silva, W. R. & Galetti, M. (eds.). Seed dispersal and frugivory: ecology, evolution and conservation. CABI Publishing, Wallingford.Google Scholar
PIMM, S. L. & RAVEN, P. 2000. Extinction by numbers. Nature 403:843845.CrossRefGoogle Scholar
PLUMPTRE, A. J. 1996. Changes since sixty years of selective timber harvesting in Budongo forest reserve, Uganda. Forest Ecology and Management 89:101113.CrossRefGoogle Scholar
RAMIREZ-MARCIAL, N. 2003. Survival and growth of tree seedlings in anthropogenically disturbed Mexican montane rain forests. Journal of Vegetation Science 14:881890.CrossRefGoogle Scholar
SCHNITZER, S. A. & CARSON, W. P. 2001. Tree fall gaps and the maintenance of species diversity in a tropical forest. Ecology 82:913919.CrossRefGoogle Scholar
SHEIL, D. 1996. The ecology of long term change in a Ugandan rain forest. D. Phil. thesis, University of Oxford.Google Scholar
SHEIL, D. 2001. Long-term observations of rain forest succession, tree diversity and responses to disturbance. Plant Ecology 155:183199.CrossRefGoogle Scholar
SHEIL, D., JENNINGS, S. & SAVIL, P. 2000. Long-term permanent plot observations of vegetation dynamics in Budongo, a Ugandan rain forest. Journal of Tropical Ecology 16:765800.CrossRefGoogle Scholar
STRUHSAKER, T. T. 1997. Ecology of an African rain forest: logging in Kibale and the conflict between conservation and exploitation. University Press of Florida, Gainesville, 419 pp.Google Scholar
TABARELLI, M. & PERES, C. A. 2002. Abiotic and vertebrate seed dispersal in the Brazilian Atlantic forest: Implications for forest regeneration. Biological Conservation 106:165175.CrossRefGoogle Scholar
TERBORGH, J., NUNEZ-ITURRI, G., PITMAN, N. C. A., VALVERDE, F. H. C., ALVAREZ, P., SWAMY, V., PRINGLE, E. G. & PAINE, C. E. T. 2008. Tree recruitment in an empty forest. Ecology 89:17571768.CrossRefGoogle Scholar
TURNER, I. M. 1996. Species loss in fragments of tropical rain forest: a review of the evidence. Journal of Applied Ecology 33:200209.CrossRefGoogle Scholar
WAGNER, P., KÖHLER, J., SCHMITZ, A. & BÖHME, W. 2008. The biogeographical assignment of a west Kenyan rain forest remnant: further evidence from analysis of its reptile fauna. Journal of Biogeography 35:13491361.CrossRefGoogle Scholar