Litter Decomposition and Nutrient Dynamics in Tropical Rainforests of Ebom, Southwestern Cameroon: Effects of LoggingDisturbed
DOI:
https://doi.org/10.12974/2311-858X.2016.04.01.4Keywords:
Litter decomposition, nutrients dynamics, logging, tropical rainforest, cameroon.Abstract
The impact of logging on litter decomposition and nutrient release was poorly understood in tropical rainforests. Litter decomposition in situ and nutrient dynamics of selected four tree species, Bubinga (Guibourtia tessmannii (Harms) J. Leonard), Ngon (klainedoxa gobonensis Pierre ex Engl.), Asseng (Musanga cecropioides (Dunal) A. Rich) and Akui (Xylopia aethiopiaca R. Brown ex Tedlie) were compared in undisturbed and logging sites of Ebom tropical rainforest, Southwest Cameroon. After 14 weeks of field experiment, dry mass remaining varied from 43.82% in G. tessmannii to 79.82% in M. cecropioïdes of initial dry mass in undisturbed site, and from 13.36% in G. tessmannii to 81.84% in M. cecropioïdes in the logging site. Decomposition rate constants (k % per week) ranged from 0.02 in M. cecropioides to 0.14 % per. week in G. tessmannii in undisturbed forest and from 0.04 % per week in X. aethiopiaca to 1.7 % per week in G. tessmannii in logging forest. In undisturbed forest, litter of G. tessmannii was rich in initial Nitrogen (N), Magnesium (Mg), Potassium (K) and Phosphorous (P) contents, and poor in initial Calcium (Ca) content. Conversely, litter of M. cecropioides was rich in initial N and Ca contents, and poor in Mg, K and P while that of K. gabonensis was poor in initial N content. Apart from Sodium (Na), all the other nutrients were released from decomposing litter 14 weeks after incubation in undisturbed site with mean released rate between 84.82% for K and 5.41% for P. In both sites, litter decomposition and nutrient dynamics of G. tessmannii were fastest while that of M. cecropioides was lowest and those of the other species intermediate. Initial nutrient content of all species was generally higher in logging site than in undisturbed one, except Ca content in litter of M. cecropioides. Litter decomposition and nutrient releases were similar in logging and undisturbed sites, excepted for G. tessmanni where litter decomposition and nutrient release were higher in logging than undisturbed site. The high turnover of litter and nutrients in logging site suggest that logging activities have little impact on litter decomposition and nutrient dynamics.References
UICN-PC. Comment aborder la REDD+ au Cameroun: Contexte, Enjeux et Options pour une Stratégie Nationale. Programme de conservation des forets. UICN-PC, 2013, 103p.
Duveiller G, Defourny P, Desclée B and Mayaux P. Deforestation in central Africa: estimates at regional, national and landscape levels by advanced processing of systematically-distributed landsat extracts. Remote Sensing of Environment 2008; 112: 1969-1981. http://dx.doi.org/10.1016/j.rse.2007.07.026
FAO and OIBT. La situation des forêts dans le bassin amazonien, le bassin du Congo et l’Asie du Sud-Est. Rapport préparé pour le Sommet des trois bassins forestiers tropicaux. Brazzaville, République du Congo, 31 mai–3 juin 2011.
Bothwell LD, Selmants PC, Giardina CP and Litton CM. Leaf litter decomposition rates increase with rising mean annual temperature in Hawaiian tropical montane wet forests. Peer J 2014. http://dx.doi.org/10.7717/peerj.685
Parsons SA, Congdon RA and Lawler IR. Determinants of the pathways of litter chemical decomposition in a tropical region. New Phytologist 2014; 203: 873-882. http://dx.doi.org/10.1111/nph.12852
Ibrahima A, Mvondo ze AD and Ntonga JC. Litter composition and nutrients dynamics of ten selected tree species in Tropical rainforest of Ebom, Southwest Cameroon. Int J Biol Chem Sci 2011; 5(1): 11-27.
Freschet GT, Cornwell WK, Wardle DA, Elumeeva TG, Liu W, Jackson BG, et al. Linking litter decomposition of aboveand below-ground organs to plant–soil feedbacks worldwide. Journal of Ecology 2013; 101: 943-95. http://dx.doi.org/10.1111/1365-2745.12092
León JD and Osorio NW. Role of Litter Turnover in Soil Quality in Tropical Degraded Lands of Colombia. The Scientific World Journal 2014; 2014: 1-11. http://dx.doi.org/10.1155/2014/693981
Gallardo A and Merino J. Leaf decomposition in two Mediterranean ecosystems of southwest Spain. Influence of substrate quality. Ecology 1993; 74: 152-161. http://dx.doi.org/10.2307/1939510
Gillon D, Joffre, R and Ibrahima A. Initial litter properties and decay rate: a microcosm experiment on Mediterranean species. Can. Jour. Bot. 1994; 74: 152-161. http://dx.doi.org/10.1139/b94-120
Anbalagan S, Rameshkumar N, Balachandran C, Arun prasanna V, Dinakaran S and Krishnan M. Leaf litter decompositional pattern in a Tropical lake of south India. Biolife 2014; 2: 900-904.
Luizão FJ and Schubart HOR. Litter production and decomposition in a terra-firme forest of central Amazonia. Experientia 1987; 43: 259-265. http://dx.doi.org/10.1007/BF01945549
Dhanya B, Viswanath S and Purushothaman S. Decomposition and Nutrient Release Dynamics of Ficus benghalensis L. Litter in Traditional Agroforestry Systems of Karnataka, Southern India. ISRN Forestry 2013; 2013: 1-7. http://dx.doi.org/10.1155/2013/524679
Vitousek PM, Turner DR, Parton WJ and Sanford RL. Litter decomposition on the Mauna Loa environmental matrix, Hawaii: patterns, mechanisms, and models. Ecology 1994; 75: 418-429. http://dx.doi.org/10.2307/1939545
Swift MJ, Heal OW and Anderson JM. Decomposition in terrestrial ecosystems. Blackwell Scientific Publications, Oxford, United Kingdom 1979.
Van Dam O. Forest filled with gaps: effects of gap size on water and nutrient cycling in tropical rainforest. A study in Guyana. Tropenbos-Guyana Series 10, Tropenbos-Guyana Programme, Georgetown, Guyana 2001.
Lecerf A and Richardson JJ. Litter decomposition can detect effects of high and moderate levels of forest disturbance on stream condition. Forest Ecology and Management 2010; 259(12): 2433-2443. http://dx.doi.org/10.1016/j.foreco.2010.03.022
Denslow JS, Ellison AM and Sanford RE. Treefall gap size effects on above and below-ground processes in a tropical wet forest. Journal of Ecology 1998; 86: 597-609. http://dx.doi.org/10.1046/j.1365-2745.1998.00295.x
Ostertag R. Belowground effects of canopy gaps in a tropical wet forest. Ecology 1998; 79: 1294-1304. http://dx.doi.org/10.1890/0012- 9658(1998)079
:BEOCGI]2.0.CO;2
Malmer A and Grip H. Converting tropical rainforest to plantation in Sabah, Malaysia. II. Effects on nutrient dynamics and net losses in stream water. Hydrobiological Processes 1993; 8: 195-209. http://dx.doi.org/10.1002/hyp.3360080303
Archard F, Eva HD, Stibig HJ, Mayaux P, Gallego J, Richards T, et al. Determination of deforestation rates of the World's humid tropical forests. Science 2002; 297: 999-1002. http://dx.doi.org/10.1126/science.1070656
Laurence WF. Reflections on the tropical deforestation crisis. Biological conservation, 1999; 91: 109-117. http://dx.doi.org/10.1016/S0006-3207(99)00088-9
Noss RF. Beyond Kyoto: forest management in a time of rapid climate change. Conser Biol 2001; 15: 578-590. http://dx.doi.org/10.1046/j.1523-1739.2001.015003578.x
Brouwer LC. Nitrogen cycling in pristine and logged tropical rainforest. Tropenbos – Guyana Series 1, TropenbosGuyana Programme, Georgetown, Guyana 1996.
Yeong KL, Reynolds G and Hil JK. Leaf litter decomposition rates in degraded and fragmented tropical rain forests of Borneo. Biotropica 2016; 1: 1-10. http://dx.doi.org/10.1111/btp.12319
Franqueville A. Atlas régional Sud-Ouest I and République du Cameroun. ORSTOM, Yaoundé, Cameroun 1973.
van Gemerden BS and Hazeu GW. Landscape ecological survey (1:100,000) of the Bipindi –Akom II-Lolodorf region, southwest Cameroon. Tropenbos-Cameroon Documents 1. The Tropenbos-Cameroon Programme, Kribi, Cameroun 1999.
Letouzey R. Notice de la carte phytogéographique du Cameroun au 1: 500,000. Institut de la Carte Internationale de la Végétation, Toulouse, France 1985.
Ibrahima A, Schmidt P, Ketner P and Mohren GJM. Phytomasse et cycle des nutriments dans la forêt tropicale dense humide du sud Cameroun. Tropenbos-Cameroon Documents 9, Kribi, Cameroun 2002.
Nounamo L and Yemefack M. Farming systems in the evergreen forest of southern Cameroon: shifting cultivation and soil degradation. Tropenbos-Canmeroon Documents 8, The Tropenbos- Cameroon Programme, Kribi, Cameroon 2001.
van Dijk JFW. Non-timber forest products in the Bipindi – Akom II region, Cameroon: a socio-economic and ecological assessment. Tropenbos-Cameroon Series 1. The Tropenbos-Cameroon Programme, Kribi, Cameroun 1999.
Bibani MR and Jonkers WBJ. Silvicultural monitoring in permanent sample plots in Ebom forest, southern Cameroon. In: Jonkers W.B.J. et al. (eds.), Sustainable management of African rainforest, part II. Tropenbos International, Wageningen, The Netherlands 2001.
Bocock KSO, Gilbert CK, Capstick DC, Twinn JS and Woodman J. Changes in leaf litter when placed on the surface of soils with contrasting humus types. I. Losses in dry weights of oak and ash leaf litter. Journal of Soil Science 1960; 11: 1-9. http://dx.doi.org/10.1111/j.1365-2389.1960.tb02196.x
Ibrahima A. Approches expérimentale et spectroscopique de la décomposition de litières méditerranéennes. Doctorat de l'Université de Montpellier II, Montpellier, France 1995.
Olson JS. Energy storage and the balance of producers and decomposers in ecological systems. Ecology 1963; 44: 322-331. http://dx.doi.org/10.2307/1932179
Bockheim JG, Jepsem EA and Heisey DM. Nutrient dynamics in decomposing leaf litter of four tree species on a sandy soil in Northwestern Wisconsin. Canadian Journal of Forestry Research 1991; 21: 803-812. http://dx.doi.org/10.1139/x91-113
Sokal JR and Rohlf RR. Biometry. 2nd edition, Freeman and Co, San Francisco, USA 1981.
Wieder RK and Lang GE. A critique of the analytical methods used in examining decomposition data obtained from litter bags. Ecology 1982; 63: 1636-1642. http://dx.doi.org/10.2307/1940104
Thomas WA. Decomposition of loblolly pine needles with and without addition of dogwood leaves. Ecology 1968; 49: 568-571. http://dx.doi.org/10.2307/1934129
Taylor B and Parkinson D. Aspen and pine leaf litter decomposition in laboratory microcosms. I Linear versus exponential models of decay. Can Jour Bot 1988; 66: 1960-1965.
Ewel JJ. Litter fall and leaf decomposition in tropical forest succession in eastern Guatemala. Jour Ecol 1977; 64: 293-308. http://dx.doi.org/10.2307/2258696
Maheswaran J and Gunatilleke IAUN. Litter decomposition in a lowland rainforest and deforested area in Sri Lanka. Biotropica 1988; 20: 90-99. http://dx.doi.org/10.2307/2388180
Ritter E. Litter decomposition and nitrogen mineralization in newly formed gaps in a Danish beech (Fagus sylvatica) forest. Soil Biol and biochem 2005; 37: 1237-1247. http://dx.doi.org/10.1016/j.soilbio.2004.11.020
Zhang Q and Liang Y. Effects of gap size on nutrient release from plant litter decomposition in a natural forest ecosystem. Can Jour For Res 1995; 25: 1627-1638. http://dx.doi.org/10.1139/x95-177
Luizão RCC, Luizao FJ and Proctor J. Fine root growth and nutrient release in decomposing leaf litter in three contrasting vegetation types in central Amazonia. Plant Ecol 2007; 192: 225-236. http://dx.doi.org/10.1007/s11258-007-9307-8
Janos DP. Mycorrhizae influence tropical succession. Biotropica 1980; 12: 56-64. http://dx.doi.org/10.2307/2388157
Onguene NA. Diversity and dynamics of mycorrhizal associations in tropical rain forests with different disturbance regimes in south Cameroon. Tropenbos – Cameroon Series 3, The Tropenbos-Cameroon Programme, Kribi, Cameroun 2000.
Chacón N and Dezzeo N. Litter decomposition in primary forest and adjacent fire-disturbed forests in the Gran Sabana, southern Venezuela. Biol and Fertil Soils 2007; 43: 815-821. http://dx.doi.org/10.1007/s00374-007-0180-3
Bauhus J, van Winden AP and Nicotra AB. Above-ground interactions and productivity in mixed-species plantations of Acacia mearnsii and Eucalyptus globulus. Can J For Res 2004; 34: 686-694. http://dx.doi.org/10.1139/x03-243
Fines JP, Ngibaot F and Ngono G. A conceptual forest management plan for a medium size forest in southern Cameroon. Tropenbos–Cameroon Documents 6. The Tropenbos-Cameroon Programme, Kribi, Cameroun 2001.
van Gemerden BS. Disturbance, diversity and distributions in Central African rain forest. Ph.D. Thesis, Wageningen University, The Netherlands 2004.
Binkley D. Forest nutrition management. John Wiley and Sons Inc, New York, USA 1986.
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