Impacts of Rice Production on Nyando Wetlands Ecosystem in Lake Victoria Basin, Kenya

  • Phoebe Akoth Adunde Department of Agriculture and Environment Science Rongo University, P.O. Box 103-40404, Rongo
  • Owuor Okeyo J. B. Department of Agriculture and Environment Science Rongo University, P.O. Box 103-40404, Rongo
  • Francis Olal Department of Physical, Biological and Health Sciences Rongo University, P.O. Box 103-40404, Rongo
Keywords: Wetland, rice production, Nyando, Impacts, Lake Victoria Basin


Wetlands are important resources that provide the community with many inter-related environmental functions and socio-economic benefits, which support a variety of livelihood strategies. In Kenya, wetlands are often utilized for rice production due to their favorable hydrological conditions and nutrient-rich soils. The unique climatic and geographical characteristics of the Nyando wetland in the Lake Victoria basin, coupled with the availability of water resources, make it suitable for rice cultivation. As rice cultivation intensifies in the region to meet rising food demand and economic opportunities in the country, Nyando Wetland has been extensively exploited, disrupting the ecological balance of the wetland ecosystem and negatively impacting biodiversity and livelihood of riparian communities. Therefore, this study evaluated the impacts of rice production on Nyando Wetlands Ecosystem in Lake Victoria Basin, Kenya. The study was based on the assumptions of the Hardy-Weinberg equilibrium principle and theory of the tragedy of commons by Garatt hardin (1968). Case study research design was employed in the study. The target population was 80,509 households living around the Nyando wetland. A sample size of 213 households was derived at using the formula developed by Krejcie and Morgan (1970). A stratified random sampling based on six wards was employed to collect data at household level using a structured questionnaire. Collected data was analysed descriptively using Statistical Package for the Social Sciences (SPPS). According to the results, rice is the most cultivated crop in the Nyando wetland, as reported by 52% of the respondents. Also, respondents reported that many farmers prefer to grow their rice in the wetland due to high grain yields. Some of the negative impacts of rice production reported included; loss of wetland biodiversity, increased incidence of pests and diseases, wetland degradation and reduced wetland size and vegetation. Majority of the respondents 86% agreed that there is a need to conserve Nyando wetlands and stated that conserving the wetland is the Government’s responsivity. The study recommends that there is need for relevant actors such as NEMA, MOA and County Government of Kisumu to empower local communities through sensitization, awareness creation and trainings on importance of conserving wetlands and ensure implementation of sustainable intensification of rice production to achieve food security with minimal disturbance of the wetlands.


Abraham, S. (2015). The relevance of wetland conservation in Kerala. International Journal of Fauna and Biological Studies, 2(3), 01-05.

Aron Keche, G. O., Lekapana, P., & Macharia, G. (2007). Status of Wetlands in Kenya and Implications for Sustainable Development.

Bambaradeniya, C. N., & Amerasinghe, F. P. (2004). Biodiversity associated with the rice field agroecosystem in Asian countries: a brief review.

Barrett, S. C., & Seaman, D. E. (1980). The weed flora of Californian rice fields. Aquatic Botany, 9, 351-376.

Berke, M. A., Johnson, T. C., Werne, J. P., Grice, K., Schouten, S., & Damsté, J. S. S. (2012). Molecular records of climate variability and vegetation response since the Late Pleistocene in the Lake Victoria basin, East Africa. Quaternary Science Reviews, 55, 59-74.

Bulmer, M. G. (1976). The effect of selection on genetic variability: a simulation study. Genetics Research, 28(2), 101-117.

Chun, Y. J., Fumanal, B., Laitung, B., & Bretagnolle, F. (2010). Gene flow and population admixture as the primary post‐invasion processes in common ragweed (Ambrosia artemisiifolia) populations in France. New Phytologist, 185(4), 1100-1107.

Dalu, T., & Chauke, R. (2020). Assessing macroinvertebrate communities in relation to environmental variables: the case of Sambandou wetlands, Vhembe Biosphere Reserve. Applied Water Science, 10(1), 1-11.

Davidson, N. C., Fluet-Chouinard, E., & Finlayson, C. M. (2018). Global extent and distribution of wetlands: trends and issues. Marine and Freshwater Research, 69(4), 620-627.

Denier van Der Gon, H. A. C., Kropff, M. J., Van Breemen, N., Wassmann, R., Lantin, R. S., Aduna, E., ... & Van Laar, H. H. (2002). Optimizing grain yields reduces CH4 emissions from rice paddy fields. Proceedings of the National Academy of Sciences, 99(19), 12021-12024.

Gardner, R. C., Barchiesi, S., Beltrame, C., Finlayson, C., Galewski, T., Harrison, I., ... & Walpole, M. (2015). State of the world's wetlands and their services to people: a compilation of recent analyses.

Hong, S. K., Koh, C. H., Harris, R. R., Kim, J. E., Lee, J. S., & Ihm, B. S. (2010). Land use in Korean tidal wetlands: impacts and management strategies. Environmental management, 45, 1014-1026.

Kairu, J. K. (2001). Wetland use and impact of Lake Victoria, Kenya region. Lakes & Reservoirs: Research and Management6: 117–125

Kayombo, S., & Jorgensen, S. E. (2006). Lake Victoria. Experience and lessons learned brief, 431-446.

Khisa, P. S., Uhlenbrook, S., van Dam, A. A., Wenninger, J., Van Griensven, A., & Abira, M. (2013). Ecohydrological characterization of the Nyando wetland, Lake Victoria, Kenya: a state of system (SoS) analysis. African Journal of Environmental Science and Technology, 7(6), 417-434.

Kihoro, J., Bosco, N. J., Murage, H., Ateka, E., & Makihara, D. (2013). Investigating the impact of rice blast disease on the livelihood of the local farmers in greater Mwea region of Kenya. Springerplus, 2, 1-13.

Kipkemboi ,J(2006) ; Finger pond , integrated seasonal aquaculture in East Africa fresh water wetlands. Exploring the potentials for wise use strategies .PHD thesis ,
institute for water Education and IHE-DELFT, The Netherlands.

Kungu, R., Njogu, P., & Kinyua, R. (2019). Development of Novel Products from Agro-Wastes (Rice Husks) and Characterization in Kenya. Journal of Environmental Science and Engineering A, 8(10.17265), 2162-5298.

Lake Victoria Basin Commission. (2011). A Study on aquatic biodiversity in the Lake Victoria basin.

Latta, P. A. (2009). " The Tragedy Of The Commons" By Garrett Hardin. Introduction to Sustainable Development-Volume I, 98.

Liu, J., Dai, Q., Li, W., Guo, Y., Dai, A., Wang, Y., ... & Yang, M. (2021). Association of vitamin D receptor gene polymorphisms with gestational diabetes mellitus-a case control study in Wuhan, China. BMC Pregnancy and Childbirth, 21, 1-8.

Maclean, J., Hardy, B., & Hettel, G. (2013). Rice Almanac: Source book for one of the most important economic activities on earth. IRRI.

Maithya, J. K. (2021). Wetland Utilization And Community Perception On Payment For Ecosystem Services In Conservation Of Nyando Wetland Of The Lake Victoria Basin, Kenya (Doctoral Dissertation, Kenyatta University).

Maithya, J., Ming’ate, F., & Letema, S. (2020). A review on ecosystem services and their threats in the conservation of Nyando Wetland, Kisumu County, Kenya. Tanzania Journal of Science, 46(3), 711-722.

MEA (2005). Ecology and human well-being: Wetlands and water synthesis. Millenium Ecosystem Assessment, World Resource Institute, Washington DC.

Mwajita, M. R., Murage, H., Tani, A., & Kahangi, E. M. (2013). Evaluation of rhizosphere, rhizoplane and phyllosphere bacteria and fungi isolated from rice in Kenya for plant growth promoters. SpringerPlus, 2(1), 1-9.

Ngigi, S. (2002). Review of irrigation development in Kenya. The changing face of irrigation in Kenya: Opportunities for anticipating change in eastern and southern Africa, 14, 35-54.

Norman, J. C., & Kebe, B. (2006). African smallholder farmers: Rice production and sustainable livelihoods. International Rice Commission Newsletter, 55(4), 33-42.

Obiero, K. O., Wa'Munga, P. O., Raburu, P. O., & Okeyo-Owuor, J. B. (2012). The people of Nyando Wetland: socioeconomics, gender and cultural issues.

Okeyo-Owuor, J. B., Raburu, P. O., Masese, F. O., & Omari, S. N. (2012). Wetlands of Lake Victoria Basin, Kenya: distribution, current status and conservation challenges.

Okotto-Okotto, J., Raburu, P. O., Obiero, K. O., Obwoyere, G. O., Mironga, J. M., Okotto, L. G., & Raburu, E. A. (2018). Spatio-temporal impacts of Lake Victoria water level recession on the fringing Nyando Wetland, Kenya. Wetlands, 38, 1107-1119.

Onganya, D. O. (2023). The Economic Benefits of Yala Wetland Resources in the Lake Victoria Basin, Threats and Management Strategies for Sustainable Development. African Journal of Education, Science and Technology, 7(3), 65-75.

Onyango, A. O. (2014). Exploring options for improving rice production to reduce hunger and poverty in Kenya. World environment, 4(4), 172-179.

Orwa, P. O., Raburu, P., Njiru, J., & Okeyo-Owuor, J. B. (2012). Human Influence on macroinvertebrate community structure within Nyando wetlands, Kenya. Int. J. of Aquatic Science, 3(2), 28-48.

Osumba, J. J. L., Okeyo-Owuor, J. B., & Raburu, P. O. (2010). Effect of harvesting on temporal papyrus (Cyperus papyrus) biomass regeneration potential among swamps in Winam Gulf wetlands of Lake Victoria Basin, Kenya. Wetlands Ecology and Management, 18, 333-341.

Ouma-Onyango, A. (2014). Promotion of rice production: a likely step to making Kenya food secure. an assessment of current production and potential. Developing Country Studies, 4(19), 26-31.

Raburu, P. O., Khisa, P., & Masese, F. O. (2012). Background information on Nyando Wetland.

Roger, P. A., Heong, K. L., & Teng, P. S. (1991). Biodiversity and sustainability of wetland rice production: role and potential of microorganisms and invertebrates. Casafa Rep, 4, 117-36.

Rongoei, P. J. K., Kipkemboi, J., Okeyo-Owuor, J. B., & Van Dam, A. A. (2013). Ecosystem services and drivers of change in Nyando floodplain wetland, Kenya. African Journal of Environmental Science and Technology, 7(5), 274-291.

Sayer, C. A., Máiz-Tomé, L., & Darwall, W. R. T. (Eds.). (2018). Freshwater biodiversity in the Lake Victoria Basin: Guidance for species conservation, site protection, climate resilience and sustainable livelihoods. Cambridge, Gland: International Union for Conservation of Nature.

Umego, C. M., Kabir, M., Adeyinka, I. A., Alao, R. O., Mallam, I., Ibrahim, O. A., & Jinadu, L. A. (2018). Single nucleotide polymorphism in the insulin-like growth factor-1 gene and its effects on growth traits in Yankasa sheep. Nigerian Journal of Animal Science, 20(4), 323-332.

Wu, C., & Chen, W. (2020). Indicator system construction and health assessment of wetland ecosystem——taking Hongze Lake Wetland, China as an example. Ecological Indicators, 112, 106164.

Yoon, C. G. (2009). Wise use of paddy rice fields to partially compensate for the loss of natural wetlands. Paddy and Water Environment, 7, 357-366.
How to Cite
Adunde, P., J. B., O., & Olal, F. (2023, May 18). Impacts of Rice Production on Nyando Wetlands Ecosystem in Lake Victoria Basin, Kenya. African Journal of Education,Science and Technology, 7(3), Pg 662-677.