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Geoecology II: Growth Dynamics and Distribution of Giant Rosette Plants on Recently Deglaciated Terrain Below the Tyndall Glacier on Mount Kenya

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Part of the International Perspectives in Geography book series (IPG,volume 17)

Abstract

The vegetation of tropical alpine environments is characterized by giant rosette plants, of which, two species, Senecio keniodendron and Lobelia telekii, were found to have grown on deglaciated terrain below Tyndall Glacier on Mount Kenya. The species are one of the most attractive elements of the landscape, which captures the attention of visiting eco-tourists. Therefore, the plants are of conservation interest, particularly during a period of climate change. In this study, I analyzed the growth dynamics and distribution of the two species. Field surveys were conducted in 2016 and 2018. The rates of mortality and recruitment were found to be closely similar, and therefore, the population numbers were stable. The heights of the surviving plants were found to have increased over the two years. When the heights of Lobelia telekii rosette leaves were >20 cm in 2016, the elongation rates of anthotactic spiral inflorescences tended to increase. The amount of solar radiation affected the distribution of the giant rosette plants, i.e., plants were distributed in areas where total solar radiation levels were high.

Keywords

  • Giant rosette plants
  • Senekio keniodendron
  • Lobelia telekii
  • Digital elevation model
  • Tyndall Glacier

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  • DOI: 10.1007/978-981-16-7853-0_7
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Correspondence to Koki Teshirogi .

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Teshirogi, K. (2022). Geoecology II: Growth Dynamics and Distribution of Giant Rosette Plants on Recently Deglaciated Terrain Below the Tyndall Glacier on Mount Kenya. In: Mizuno, K., Otani, Y. (eds) Glaciers, Nature, Water, and Local Community in Mount Kenya. International Perspectives in Geography, vol 17. Springer, Singapore. https://doi.org/10.1007/978-981-16-7853-0_7

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