Responses of Ocotea usambarensis to logging on the Southern Slopes of Mount Kilimanjaro, Tanzania

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Research Paper 03/11/2024
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Responses of Ocotea usambarensis to logging on the Southern Slopes of Mount Kilimanjaro, Tanzania

Stephen B. Moshy, Francis Moyo, Linus K. Munishi
J. Bio. Env. Sci.25( 5), 24-34, November 2024.
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Abstract

The East African Camphorwood (Ocotea usambarensis) population in the montane forests of East Africa has experienced heavy logging. This logging can be attributed to both historical, legal and commercial harvesting of the species under colonial governments and subsequent illegal selective logging. This study assessed the population structure of Ocotea usambarensis, as influenced by the historical logging intensity and elevation gradient (1800 – 2500m) on the southern slopes of Mt. Kilimanjaro. The mean stem density and basal area of seedlings, saplings, and adults were compared using the Wilcoxon signed-rank test. The age structure of Ocotea usambarensis varied along the elevation gradient and across different logging intensity blocks. The comparison between blocks with different historical logging intensities revealed no significant difference. However, significant variation in stem density and basal area of adults was observed along the elevation gradient. The results further indicated the population distribution of Ocotea usambarensis exhibited a reverse J-shaped pattern, with the highest number of seedlings and the lowest number of adults, indicating a positive recovery suggesting a sustainable population. These findings suggest that logging affects mature trees near the park boundary, highlighting the need for increased enforcement and participatory approaches for sustainable conservation of the species in its range areas.

VIEWS 33

Agrawala S, Moehner A, Hemp A, Van Aalst M, Hitz S, Smith J, Meena H, Mwakifwamba SM, Hyera T, Mwaipopo OU. 2003. Development and climate change in Tanzania: Focus on Mount Kilimanjaro. Organisation for Economic Co-operation and Development (OECD).

Ahmed E, Ali S, Addisu A. 2017. Structure and regeneration status of woody plants in the Hallideghie wildlife reserve, North East Ethiopia. International Journal of Biodiversity and Conservation 9(6), 200–211. DOI: 10.5897/ijbc2017.1085.

Andrade GS, Rhodes JR. 2012. Protected areas and local communities: An inevitable partnership toward successful conservation strategies? Ecology and Society 17(4). DOI: 10.5751/ES-05216-170414.

Bailey KD. 1994. Typologies and taxonomies. Thousand Oaks, CA. SAGE Publications, Inc. DOI: 10.4135/9781412986397.

Balemlay S, Siraj M. 2021. Population structure and regeneration status of woody species in Kenech Forest, Southwest Ethiopia. International Journal of Forestry Research 2021. DOI: 10.1155/2021/6640285.

Bussman R. 2001. Succession and regeneration patterns of East African mountain forests: A review. Systematic and Geography of Plants 71(2), 959–974.

Condit R, Sukumar R, Hubbell SP, Foster R. B. 1998. Predicting population trends from size distributions: A direct test in a tropical tree community. The American Naturalist 152(4), 495–509.

Franklin J, Serra-Diaz JM, Syphard AD, Regan HM. 2016. Global change and terrestrial plant community dynamics. Proceedings of the National Academy of Sciences of the United States of America 113(14), 3725–3734. DOI: 10.1073/pnas.1519911113

Hemp A. 2006a. Continuum or zonation? Altitudinal gradients in the forest vegetation of Mt. Kilimanjaro. Plant Ecology 184(1), 27–42. DOI: 10.1007/s11258-005-9049-4.

Hemp A. 2006b. Vegetation of Kilimanjaro: Hidden endemics and missing bamboo. African Journal of Ecology 44(3), 305–328. DOI: 10.1111/j.1365-2028.2006.00679.x.

Hermansen J. 1985. Catchment forestry in Tanzania.

Hitimana J, Kiyiapi JL, Njunge JT. 2004. Forest structure characteristics in disturbed and undisturbed sites of Mt. Elgon Moist Lower Montane Forest, western Kenya. Forest Ecology and Management 194(1–3), 269–291. DOI: 10.1016/j.foreco.2004.02.025.

Humphreys AM, Govaerts R, Ficinski SZ, Nic Lughadha E, Vorontsova MS. 2019. Global dataset shows geography and life form predict modern plant extinction and rediscovery. Nature Ecology and Evolution 3(7), 1043–1047. DOI: 10.1038/s41559-019-0906-2.

Kikoti IA, Mligo C. 2015. Impacts of livestock grazing on plant species composition in montane forests on the northern slope of Mount Kilimanjaro, Tanzania. International Journal of Biodiversity Science, Ecosystem Services and Management 11(2), 114–127. DOI: 10.1080/21513732.2015.1031179.

Kleinschroth F, Healey JR, Gourlet-Fleury S. 2013. Regeneration of the East African timber tree Ocotea usambarensis in relation to historical logging. Forest Ecology and Management 291, 396–403. DOI: 10.1016/j.foreco.2012.11.021.

Koirala M. 2004. Vegetation composition and diversity of Piluwa micro-watershed in Tinjure-Milke region, east Nepal. Himalayan Journal of Sciences 2(3), 29–32. DOI: 10.3126/hjs.v2i3.227.

Lambrechts C. 2002. The Threats to Mt. Kilimanjaro. (February).

Le Roux JJ, Hui C, Keet JH, Ellis AG. 2019. Recent anthropogenic plant extinctions differ in biodiversity hotspots and coldspots. Current Biology 29(17), 2912-2918.e2. DOI: 10.1016/j.cub.2019.07.063.

Mohammed EMI, Adam YOM, Elamin HA. 2021. Tree population structure, diversity, regeneration status, and potential disturbances in Abu Gadaf natural reserved forest, Sudan. Environmental Challenges 5(August), 100366. DOI: 10.1016/j.envc.2021.100366.

Morris RJ. 2010. Anthropogenic impacts on tropical forest biodiversity: A network structure and ecosystem functioning perspective. Philosophical Transactions of the Royal Society B: Biological Sciences 365(1558), 3709–3718. DOI: 10.1098/rstb.2010.0273.

Msalilwa UL, Munishi PKT, Treydte AC. 2019. Emerging issues and challenges associated with conservation of the African baobab (Adansonia digitata L.) in the semi-arid areas of Tanzania. Journal of Biodiversity and Environmental Sciences 15(5), 76–91.

Msalilwa UL, Munishi PKT, Treydte AC. 2020. Demography of baobab (Adansonia digitata L.) population in different land uses in the semi-arid areas of Tanzania. Global Ecology and Conservation 24, e01372. DOI: 10.1016/j.gecco.2020.e01372.

Mueller-Dombois R. 1974. Aims and methods of vegetation ecology.

Mwavu EN, Witkowski ETF. 2009. Population structure and regeneration of multiple-use tree species in a semi-deciduous African tropical rainforest: Implications for primate conservation. Forest Ecology and Management 258(5), 840–849. DOI: 10.1016/j.foreco.2009.03.019.

Paudel P, Mandal RA. 2019. Comparing growing stock using circular, square, and rectangular plot shapes in inventory (A study from community forests in Chitwan District, Nepal). (October). DOI: 10.32474/OAJESS.2019.04.000177.

Paul A, Khan ML, Das AK. 2019. Population structure and regeneration status of rhododendrons in temperate mixed broad-leaved forests of western Arunachal Pradesh, India. Geology, Ecology, and Landscapes 3(3), 168–186. DOI: 10.1080/24749508.2018.1525671.

Percy S, Arico S, Reid W, Mooney H, Cropper A, Capistrano D, Lee M, Ash N. 2005. Millennium Ecosystem Assessment Business and Industry Synthesis. A Report of the Millennium Ecosystem Assessment. Available at: http://www.alexandrina.org/CSSP/Event/.

Renner M, Hemp A, Ensslin A, Rutten G, Fischer M. 2022. Natural regeneration of woody plant species along an elevational and disturbance gradient at Mt. Kilimanjaro. Forest Ecology and Management 520, 120356. DOI: 10.1016/j.foreco.2022.120356.

Richard J, Madoffe SS, Maliondo SMS. 2014. Assessment of factors for declining regeneration and death of East African camphor in moist mountainous forest of Tanzania. Journal of Tropical Forest Science 26(4), 495–502.

Rutten G, Ensslin A, Hemp A, Fischer M. 2015a. Forest structure and composition of previously selectively logged and non-logged montane forests at Mt. Kilimanjaro. Forest Ecology and Management 337, 61–66. DOI: 10.1016/j.foreco.2014.10.036.

Rutten G, Ensslin A, Hemp A, Fischer M. 2015b. Vertical and horizontal vegetation structure across natural and modified habitat types at Mount Kilimanjaro. PLoS ONE 10(9). DOI: 10.1371/journal.pone.0138822.

Said M, Mtei K, Lyimo J, Mbaga T. 2021. Predicting land use/cover changes and its association to agricultural production on the slopes of Mount Kilimanjaro, Tanzania. Annals of GIS 27(2), 189–209. DOI: 10.1080/19475683.2020.1871406.

Willan RL. 1965. Natural regeneration of high forest in Tanganyika. East African Agricultural and Forestry Journal 31(1), 43–53. DOI: 10.1080/00128325.1965.11662025.

Woldie BA, Tadesse SA. 2020. Composition and structure of woody vegetation in community compared to state forests in Tehuledere District, South Wollo, Ethiopia. Journal of Sustainable Forestry, 39(8), 757–783. https://doi.org/10.1080/10549811.2020.1772826.