Harvesting of papyrus biomass plays a significant role in regulating ecosystem services of which one of them is nutrient uptake and cycling. Despite Lake Victoria’s wetlands being important, little is understood about its role in nutrient uptake and removal. Although there have been studies done in these wetlands, there is inadequate understanding on the implication of unselective biomass harvesting on the water quality of Lake Vitoria. At the same time, these wetlands are threatened by livelihood-related pressures which are driven by extreme hydrological regimes. This study focused on Nyando floodplain wetland located in the Eastern part of the shores of Lake Victoria which is a lifeline to many rural communities living around the lake. Papyrus biomass harvesting was assessed in two study sites of Nyando wetland and at different seasons in order to determine its implication on nutrient regulating services. Participatory tools, field survey, observation, field measurements and laboratory analysis were used. Harvesting of papyrus removed 530.6 Kg N/g DM/ha/day and 97 Kg P/g DM/ha/day in Ogenya while 771.2 Kg N/g DM/ha/day and 109.2 Kg P/g DM/ha/day were removed in Wasare. However, addition of nutrients to the wetland may lead to the problem of eutrophication especially at the site where interaction of wetland and lake water occurs. Understanding the role of papyrus harvesting patterns is crucial for better planning and management of this complex resource in a changing environment.
References
[1]
MEA (Millennium Ecosystem Assessment) (2005) Ecosystems and Human-Wellbeing: Wetlands and Water Synthesis. World Resources Institute, Washington.
[2]
TEEB (2010) The Economics of Ecosystems and Biodiversity: Mainstreaming the Economics of Nature: A Synthesis of the Approach, Conclusions and Recommendations of TEEB. United Nations Environment Program, Nairobi.
http://www.teebweb.org
[3]
Kansiime, F., Saunders, M. and Loiselle, S. (2007) Functioning and Dynamics of Wetland Vegetation of Lake Victoria: An Overview. Wetlands Ecology and Management, 15, 443-451. https://doi.org/10.1007/s11273-007-9043-9
[4]
Kiwango, Y.A. and Wolanski, E. (2008) Papyrus Wetlands, Nutrients Balance, Fisheries Collapse, Food Security, and Lake Victoria Level Decline in 2000-2006. Wetlands Ecology and Management, 16, 89-96.
https://doi.org/10.1007/s11273-007-9072-4
[5]
Swallow, M.B., Sang, J.K., Nyabenge, M., Bundotich, D.K., Duraiappah, A.K. and Yatich, T.B. (2009) Trade-Offs, Synergies and Traps among Ecosystem Services in the Lake Victoria Basin of East Africa. Environmental Science and Policy, 12, 504-519. https://doi.org/10.1016/j.envsci.2008.11.003
[6]
Van Dam, A.A., Dardona, A., Kelderman, P. and Kansiime, F. (2007) A Simulatio Model for Nitrogen Retention in a Papyrus Wetland near Lake Victoria, Uganda (EA). Wetlands Ecology and Management, 15, 469-480.
https://doi.org/10.1007/s11273-007-9047-5
[7]
Verhhoeven, J.T.A. and Setter, T.L. (2009) Agricultural Use of Wetlands: Opportunities and Limitations. Annals of Botany, 105, 155-163.
https://doi.org/10.1093/aob/mcp172
[8]
Rongoei, P.J.K., Kipkemboi, J., Okeyo-Owuor, J.B. and van Dam, A.A. (2013) Ecosystem Services and Drivers of Change in Nyando Floodplain Wetland, Kenya. African Journal of Environmental Science and Technology, 7, 274-291.
[9]
Rongoei, P.J.K., Kipkemboi, J., Kariuki, S.T. and van Dam, A.A. (2014) Effects of Water Depth and Livelihood Activities on Plant Species Composition and Diversity in Nyando Floodplain Wetland, Kenya. Wetlands Ecology and Management, 22, 177-189. https://doi.org/10.1007/s11273-013-9313-7
[10]
Kipkemboi, J., van Dam, A.A. and Denny, P. (2006) Biophysical Suitability of Smallholder Integrated Aquaculture-Agriculture Systems (Finger Ponds) in East Africa’s Lake Victoria Freshwater Wetlands. International Journal of Ecology and Environmental Sciences, 32, 75-83.
[11]
Mwakubo, S.M. and Obare, G.A. (2009) Vulnerability, Livelihood Assets and Institutional Dynamics in the Management of Wetlands in Lake Victoria Watershed Basin. Wetlands Ecology and Management, 17, 613-626.
https://doi.org/10.1007/s11273-009-9138-6
[12]
World Agroforestry Centre (2006) Improved Land Management in the Lake Victoria Basin: Final Report on the TransVic Project. World Agroforestry Centre, Nairobi.
[13]
Muthuri, F.M. and Jones, M.B. (1997) Nutrient Distribution in a Papyrus Swamp: Lake Naivasha, Kenya. Aquatic Botany, 56, 35-50.
https://doi.org/10.1016/S0304-3770(96)01093-5
[14]
APHA (1998) Standard Methods for the Examination of Water and Wastewater. 20th Edition, American Public Health Association, American Water Works Association and Water Environmental Federation, Washington DC.
[15]
R Core Team (2015) R: A Language and Environment for Statistical Computing. R Foundation for Statistical Computing, Vienna. http://www.R-project.org
[16]
Obiero, K.O., Raburu, P.O., Okeyo-Owuor, J.B. and Raburu, E.A. (2012) Community Perceptions on the Impact of the Recession of Lake Victoria Water on Nyando Wetlands. Science Research Essays, 7, 1647-1661.
https://doi.org/10.5897/SRE11.324
[17]
Terer, T., Triest, L. and Muthama, M.A. (2012) Effects of Harvesting Cyperus papyrus in Undisturbed Wetland, Lake Naivasha, Kenya. Hydrobiologia, 680, 135-148.
https://doi.org/10.1007/s10750-011-0910-2
[18]
Morrison, E.H.J., Upton, C., Odhiambo-K’Oyooh, K. and Harper, D.M. (2012) Managing the Natural Capital of Papyrus within Riparian Zones of Lake Victoria, Kenya. Hydrobiologia, 692, 5-17. https://doi.org/10.1007/s10750-011-0839-5
[19]
Gichuki, J., Guebas, F.D., Mugo, J., Rabuor, C.O., Triest, L. and Dehairs, F. (2001) Species Inventory and the Local Uses of the Plants and Fishes of the Lower Sondu Miriu Wetland of Lake Victoria, Kenya. Hydrobiologia, 458, 99-106.
https://doi.org/10.1023/A:1013192330498
[20]
World Agroforestry Centre (2012) Lake Victoria Basin.
http://www.worldagroforestrycentre.org/newwebsite/sites
[21]
Harper, D.M. and Mavuti, K.M. (2004) Lake Naivasha Kenya: Ecohydrology to Guide the Management of a Tropical Protected Area. Ecohydrology & Hydrobiology, 4, 287-305.
[22]
Osborne, P.L. (2012) Tropical Ecosystems and Ecological Concepts. Cambridge University Press, Cambridge, 349-353. https://doi.org/10.1017/CBO9781139057868
[23]
Khisa, P.S., Uhlenbrook, S., van Dam, A.A., Wenninger, J., van Griensven, A. and Abira, M. (2013) Ecohydrological Characterization of the Nyando Wetland, Lake Victoria: A State of System Analysis (SOS) Analysis. African Journal of Environmental Science and Technology, 7, 417-434. https://doi.org/10.5897/AJEST13.1426
[24]
Barducci, A., Gizzi, D., Marcoionni, P. and Pippi, I. (2009) Aerospace Wetland Monitoring by Hyperspectral Imaging Sensors: A Case Study in the Coastal Zone of San Rossore Natural Park. Journal of Environmental Management, 90, 2278-2286.
https://doi.org/10.1016/j.jenvman.2007.06.033
[25]
Rongoei, P.J.K., Kipkemboi, J. and van Dam, A.A. (2015) Decomposition and Nutrient Dynamics of Plant Litter in Nyando Floodplain Wetland, Kenya. Egerton Journal of Science and Technology, 15, 163-186.
[26]
Rongoei, P.J.K. and Outa, N.O. (2016) Cyperus papyrus L. Growth Rate and Mortality in Relation to Water Quantity, Quality and Soil Characteristics in Nyando Floodplain Wetland, Kenya. Open Journal of Ecology, 6, 714-735.
https://doi.org/10.4236/oje.2016.612065
[27]
Kyambadde, J. (2005) Optimizing Processes for Biological Nitrogen Removal in Nakivubo Wetland, Uganda. PhD Thesis, AlbaNova University Centre, Stockholm.
[28]
Mburu, N. (2013) Experimental and Modelling Studies of Horizontal Sub-Surface Flow Constructed Wetlands Treating Domestic Wastewater. PhD Thesis, Wageningen and UNESCO-IHE Institute for Water Education, 194 p.
[29]
Kuschk, P., Wiebner, A., Kappelmeyer, U., Weibbrodt, E., Kastner, M. and Stottmerster, U. (2003) Annual Cycle of Nitrogen Removal by a Pilot-Scale Subsurface Horizontal Flow in a Constructed Wetland under Moderated Climate. Water Research, 37, 4236-4242. https://doi.org/10.1016/S0043-1354(03)00163-5
[30]
Vohla, C., Alas, R., Nruk, K., Baatz, S. and Mander, U. (2007) Dynamics of Phosphorus, Nitrogen, and Carbon Removal in a Horizontal Subsurface Flow Constructed Wetland. Science of the Total Environment, 380, 66-74.
[31]
Hes, E.M.A., Niu, R. and van Dam, A.A. (2014) A Simulation Model for Nitrogen Cycling in Natural Rooted Papyrus Wetlands in East Africa. Wetlands Ecology and Management, 22, 157-176. https://doi.org/10.1007/s11273-014-9336-8
[32]
Dhote, S. and Dixit, S. (2009) Water Quality Improvement through Macrophytes-A Review. Environmental Monitoring and Assessment, 152, 149-153.
https://doi.org/10.1007/s10661-008-0303-9
[33]
Sekadende, B.C., Machiwa, F.J. and Mwanuzi, F.F. (2014) Processes Governing the Retention of Phosphorus and Nitrogen in Nyashishi Wetland. Open Journal of Ecology, 4, 124-134. https://doi.org/10.4236/oje.2014.43014
