African Journal of
Plant Science

  • Abbreviation: Afr. J. Plant Sci.
  • Language: English
  • ISSN: 1996-0824
  • DOI: 10.5897/AJPS
  • Start Year: 2007
  • Published Articles: 628

Full Length Research Paper

Response of Cyperus papyrus productivity to changes in relative humidity, temperature and photosynthetically active radiation

Opio A.
  • Opio A.
  • Department of Biology, Faculty of Science, Gulu University, P. O. Box 166, Gulu, Uganda.
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Jones B. M.
  • Jones B. M.
  • Department of Botany, School of Natural Sciences, Trinity College Dublin, Dublin, Ireland.
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Kansiime F.
  • Kansiime F.
  • Department of Environmental Management, College of Agricultural and Environmental Sciences, Makerere University, P. O. Box 7062, Kampala, Uganda.
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Otiti T.
  • Otiti T.
  • Department of Physics, College of Natural Sciences, Makerere University, P. O. Box 7062, Kampala, Uganda.
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  •  Received: 19 April 2016
  •  Accepted: 26 May 2016
  •  Published: 31 May 2017

Abstract

Ecosystem development is related to climatic conditions. To assess the effect of seasonal changes in climate factors on papyrus ecosystem development, community biomass was estimated non-destructively and climate factors recorded in the wetland. Absolute aerial biomass and productivity were not significantly different between wet and dry seasons. Although there was significant vapour pressure deficit change over the seasons, the impact on net primary productivity was not significant, but exhibited positive association during dry season. Primary productivity was positively related to photosynthetically active radiation during both dry and wet seasons. Except for the dry season that accounted for 26.1% of primary productivity, that of the wet season was independent (0%) of measured weather variables. 
 
Key words: Cyperus papyrus, photosynthetically active radiation, productivity, relative humidity, temperature, wetlands.