Population dynamics of Spirostachys africana Sond. a species highly exploited amongst some communities of Limpopo Province, South Africa

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DOI https://doi.org/10.13057/biodiv/d240157
Issue
Vol. 24 No. 1 (2023)
Section
Articles
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This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

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PHALANNDWA MASHUDU VICTOR ♥
Department of Biological Sciences, Faculty of Science, Engineering and Agriculture, University of Venda. Private Bag X5050, Thohoyandou 0950, South Africa
MILINGONI PETER TSHISIKHAWE
Department of Biological Sciences, Faculty of Science, Engineering and Agriculture, University of Venda. Private Bag X5050, Thohoyandou 0950, South Africa
KHATHUTSHELO MAGWEDE
Department of Biological Sciences, Faculty of Science, Engineering and Agriculture, University of Venda. Private Bag X5050, Thohoyandou 0950, South Africa

Abstract

Abstract. Victor PM, Tshisikhawe MP, Magwede K. 2023. Population dynamics of Spirostachys africana Sond. a species highly exploited amongst some communities of Limpopo Province, South Africa. Biodiversitas 24: 492-497. Over-exploitation of important indigenous plant species impact negatively on their population structure. Unmonitored and unsustainable harvesting from plant ecosystems may inhibit plant recovery. The aim of the study was to investigate the population structure of Spirostachys africana in a communal area of Ha-Matsa Village in Limpopo Province, South Africa. Eleven transects of 100m x 10m were used to sample ecological parameter data from 66 plant specimens of S. africana species. Transects were subjectively placed within the population of S. africana. Data on plant height size classes and basal stem diameter size classes exhibited an almost Bell-shaped population curve. The population of S. africana did not have many seedlings, with the Crown health status data revealing a population with generally moderately damaged crowns (24%), while 19% of individuals had healthy crowns. The concern is the recorded 9% of dead crowns. Although the population looks great from a distance, the sampled ecological data revealed an unviable population. The Spirostachys africana population of Ha-Matsa Village does not have more individuals in the small size classes of both height and basal stem diameter. Conservation practice implies that if anthropogenic activities are not properly monitored, there may not be enough young individuals to support the population of S. africana into the future. Therefore, this study aimed to improve the assessment and the effects of harvesting on the S. africana species population. This study also suggests important information and guides ecologists and conservationists on sustainable harvesting practices and offtakes of S. africana.

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References
Bakali M, Ligavha-Mbelengwa MH, Potgieter MJ, Tshisikhawe MP. 2017. Impact of ethnobotanical utilization on the population structure of Androstachys johnsonii Prain. in the Vhembe area of the Limpopo Province, South Africa. Insights of For Res 1(1): 50-56.
Botha M, Siebert SJ, Van den Berg J, Ellis SM, Dreber N. 2017. Plant functional types differ between the grassland and savanna biomes along an agro-ecosystem disturbance gradient. South Africa SA J of Botany 113: 308-317. DOI: 10.1016/j.sajb.2017.09.008
Cousins SR, Witkowski ETF, Pfab MF. 2014. Elucidating patterns in the population size structure and density of Aloe plicatilis, a tree aloe endemic to the Cape fynbos, South Africa. SA J of Bot 90: 20-36. DOI: 10.1016/j.sajb.2013.09.012
Deepa GB, Jagannatha RR, Suresh HM, Mark AS, Pisupati B. 2018. Principles and practices of sustainable use and sustainable harvesting. The University of Trans-Disciplinary Health Science and Technology and Forum for Law, Environment, Development and Governance, Bengaluru, India.
Delvaux C, Sinsin B, Darchambeau F, Van Damme P. 2009, Recovery from bark harvesting of 12 medicinal tree species in Benin, West Africa. J of App Ecol 46: 703-712. DOI: 10.1111/j.1365-2664.2009.01639.x
Helm CV, Witkowski ETF. 2012. Characterising wide spatial variation in population size structure of a keystone African savanna tree. For Ecol Manag 263: 175-188. DOI: 10.1016/j.foreco.2011.09.024.
Jima TT, Megersa M. 2018. Ethnobotanical study of medicinal plants used to treat human diseases in Berbere District, bale zone of Oromia Regional State, Southeast Ethiopia. Evidence-Based Compl and Alt Med. DOI: 10.1155/2018/8602945.
Lennox SJ. 2019. The identification of Cryptocarya spp., Lauraceae in archeological charcoal. South African Journal of Botany 123: 372-381. DOI: 10.1016/j.sajb.2019.01.021.
Madonsela S, Cho MA, Ramoelo A, Mutanga O, Naidoo L. 2018. Estimating tree species diversity in the savannah using NDVI and woody canopy cover. Int J of App Earth Observ Geoinf 66: 106-115. DOI: 10.1016/j.jag.2017.11.005.
Morin RS, Randolph KC, Steinman J. 2015. Mortality rates associated with crown health for eastern forest tree species. Environ Monit Assess 187: 87. DOI: 10.1007/s10661-015-4332-x.
Muvengwi J, Chisango T, Mpakairi K, Mbiba M, Witkowski ETF. 2020. Structure, composition and regeneration of miombo woodlands within harvested and unharvested areas. For Ecol Manag 458: 1-10.
Schmidt IB, Ticktin T. 2012. When lessons from population models and local ecological knowledge coincide – Effects of flower stalk harvesting in the Brazilian savannah. Biol Conserv 152: 187-195. DOI: 10.1016/j.biocon.2012.03.018.
Soumya KV, Shackleton CM, Setty SR. 2019. Impacts of gum-resin harvest and Lantana camara invasion on the population structure and dynamics of Boswellia serrata in the Western Ghats, India. For Ecol Manag 453: e117618. DOI: 10.106/j.foreco.2019.117618.
Statistics South Africa. https://www.statssa.gov.za/
Ticktin T, Kindscher K, Souther S, Chamberlain JL, Hummel S, Mitchell C, Sanders S. 2018. Ecological dimensions of non-timber forest product harvest. In: Chamberlain JL, Emery MR, Patel-Weynand T. Assessment of non-timber forest products in the United States under changing conditions: General technical report. Southern Research Station: 61-81.
Ticktin T, Schackleton C. 2011. Harvesting non-timber forest products sustainably: Opportunities and challenges. In: Schackleton S, Schacklton C, Shanely P. 2011. Non-timber forest products. The Global Context 7: 149-169. DOI: 10.1007/978-3-642-17983-9-7.
Tshisikhawe MP. 2012. An ecological evaluation of the sustainability of bark harvesting of medicinal plant species in the Venda region, Limpopo Province, South Africa. PHD thesis, University of Pretoria, Pretoria, South Africa.
Tshisikhawe MP, Baloyi O, Ligavha-Mbelengwa MH, Bhat RB. 2012. The population ecology of Securidaca longepedunculata Fresen. in the Nylsvley Nature Reserve, Limpopo province, South Africa. Int J Exp Bot 81: 107-112. DOI: 10.32604/phyton.2012.81.107.
Tshisikhawe MP, Van Rooyen MW. 2013. Population biology of Elaeodendron transvaalense Jacq. in the presence of harvesting. Int J Exp Bot 82: 303-311.
Van Coller H, Siebert F, Scogings PF, Ellis S. 2018. Herbaceous responses to herbivory, fire and rainfall variability differ between grasses and forbs. SA J Bot 119: 94-103. DOI: 10.1016/j.sajb.2018.08.024.
Wagner S, Fischer H, Huth F. 2011. Canopy effects on vegetation caused by harvesting and regeneration treatments. Euro J For Res 30: 17-40. DOI: 10.1007/s10342-010-0378-z.