Impact of Protected Areas and Land Use on Regeneration of Acacia Woodland’s in Eastern Burkina Faso
DOI:
https://doi.org/10.21248/fvss.11.3Keywords:
Acacia, early fire, land useAbstract
Regeneration success, persistence strategies (seedlings vs. coppicing), and population trend of Acacia spp. were tested under two land-use regimes in eastern Burkina Faso: (i) protected areas shielded to livestock grazing pressure, to logging, and using early annual fire as a management system; (ii) areas with high human impact (heavily and extensive livestock grazing, harvesting for wood and for medicinal plants). Generally, a good regeneration rate of Acacia species was observed in protected areas and a poor regeneration rate in areas with high human impact. Nevertheless, some species affiliated to the subgenus Aculeiferum as A. dudgeoni and A. polyacantha showed a good regeneration under both land use regimes. Juvenile plants less than 25 cm height of A. dudgeoni and A. gourmaensis increased by 116 to 50 % in areas with human impact as compared to their populations in protected areas. With SCD slopes varying from –0.40 to -0.70, the protected Acacia woodland displayed a stable population structure due to abundance of recruitment, and coppicing persistence (more common in the subgenus Aculeiferum) favoured by early annual fire. Consequently, the protected areas are favourable for Acacia woodland regeneration. Conversely, SCD slopes are positive or close to zero in areas of anthropogenic regime and showed a declining population, especially more marked with the subgenus Acacia due to permanent seed and seedling removal by livestock grazing. Nevertheless, the number of seedlings of some species was higher in areas under human pressure than in protected areas, especially for the subgenus Aculeiferum, improving the genetic variability and thus the long-term maintenance of the populationReferences
Akpo, E. & Grouzis, M. (1996): Influence du couvert sur la régénération de quelques espèces ligneuses sahéliennes (Nord Sénégal, Afrique Occidentale). Webbia 50 (2): 247-263. https://doi.org/10.1080/00837792.1996.10670605
Arbonnier, M. (2000): Arbres, arbustes et lianes des zones sèches d’Afrique de l’Ouest. CIRAD, MNHN, UICN, Paris, 541 p.
Agargaw, M., Teketay, D. & Olson, M. (1999): Soil seed flora, germination, and regeneration pattern of woody spe-cies in Acacia woodland of the Rift Valley in Ethiopia. J. Arid Environm. 43: 411-435. https://doi.org/10.1006/jare.1999.0532
Barnes, M.E. (2001a): Seed predation, germination and seedling establishment of Acacia erioloba in northern Botswana. J. Arid Environm. 49: 541-554. https://doi.org/10.1006/jare.2001.0805
Barnes, M.E. (2001b): Effects of large herbivores and fire on the regeneration of Acacia erioloba woodlands in Chobe National Park, Botswana. African J. Ecol. 39: 340-350. https://doi.org/10.1046/j.1365-2028.2001.00325.x
Breman, H. & Deridder, N. (1991): Manuel sur les pâtu-rages des pays sahéliens. ACCT-CTA-Karthala, Paris, Wa-geningen, 485 p.
Coe, M. & Coe, C. (1987): Large herbivores, Acacia trees and bruchid beetles. South African J. Science 83: 624-635. https://journals.co.za/doi/abs/10.10520/AJA00382353_5410
Condit, R., Sukumar, R., Hubbell, S.P. & Foster, R.B. (1998): Predicting population trends from size distribu-tions—a direct test in a tropical tree community. American Naturalist 152: 494–509. https://doi.org/10.1086/286186
Danthu, P., Ndongo, M., Diaou, M., Thiam, O., Sarr, A., Dedhiou, B. & Vall, A.O.(2003): Impact of fire on germi-nation of some West African acacias. Forest Ecol. Manage-ment 173: 1-10. https://doi.org/10.1016/s0378-1127(01)00822-2
Danthu, P., Roussel, J., Dia, m. & Sarr, a. (1996): Effect of different pre-treatments on germination of Acacia senegal seeds. Seed Sci. Technol. 20: 111-117.
Everard, D., Midgley, J.J. & v a n Wyk, G.F. (1995): Dynamics of some forests in KwaZulu-Natal, South Africa, based on ordinations and size class distributions. South African J. Bot. 61: 283-292. https://doi.org/10.1016/s0254-6299(15)30548-2
Fao (1998): World Reference Base for Soil Resources. World Soil Resource Reported 84. FAO, ISRIC, ISSS, Rome, 88 p.
Fenner, M. (1987): Seedlings. New Phytol. Suppl. 106: 35-47. https://doi.org/10.1111/j.1469-8137.1987.tb04681.x
Fontes, J. & Guinko, S. (1995): Carte de la végétation et de l’occupation du sol au Burkina Faso. Notice explicative. Ministère de la coopération française, Toulouse, 159 p.
Gampine, D. & Boussim, I.J. (1995): Etude de la contrainte à la régénération de neuf espèces ligneuses au Burkina Faso. Etudes flor. vég. Burkina Faso1: 3-16.
Getachew, T., Demel, T., Yoseph, A. & Masresha, F. (2004): The Impact of Fire on the Soil Seed Bank and Rege-neration of Harenna Forest, South-eastern Ethiopia. Moun-tain Research Development 24: 354-361 https://doi.org/10.1659/0276-4741(2004)024%5B0354:tiofot%5D2.0.co;2
Grice, A. C., Westoby, M. & Torpy, C. (1994): Dynamics and population structure of Acacia victoria Benth. Australi-an J. Ecol. 19: 10–16. https://doi.org/10.1111/j.1442-9993.1994.tb01537.x
Hoffmann, A.W. (1998): Post-burn reproduction of woo-dy plants in a neotropical savanana, the relative importance of sexual and vegetative reproduction. J. Applied Ecol. 35: 422-433. https://doi.org/10.1046/j.1365-2664.1998.00321.x
Louda, S.M. (1989): Predation in the dynamics of seed regeneration. In le C K, M.A., pa rK e r, V.T. & si m p s o n, L. (eds.): Ecology of soil seed banks. Academic Press, San Di-ego: 25-51. https://doi.org/10.1016/b978-0-12-440405-2.50008-7
Lykke, A.M. (1998): Assessment of species composition change in savanna vegetation by means of woody plants' size class distributions and local information. Biodiv. Conservation 7: 1261-1275 https://link.springer.com/article/10.1023/A:1008877819286
Midgley, J.J. & Bond, W.J. (2001): A synthesis of the de-mography of African acacias. J. Tropical Ecol. 17: 871-886. https://doi.org/10.1017/s026646740100164x
Miller, M.F. (1993): Large African herbivores, bruchid beetles and their interactions with Acacia seeds. Oecologia 87: 265-270. https://doi.org/10.1007/bf00323159
Mwalyosi, R.B. (1990): The dynamic ecology of Acacia tortilis woodland in Lake Manyara National Park, Tanzania. African J. Ecol. 28: 189–199. https://doi.org/10.1111/j.1365-2028.1990.tb01152.x
Oba, G. (1998): Effect of excluding goat herbivory on Acacia tortilis woodland around pastoralist settlements in northwest Kenya. Acta Oecol. 19: 395-404. https://doi.org/10.1016/s1146-609x(98)80044-1
Or, K. & Ward, D. (2003): Three way interactions between Acacia, large mammalian herbivores and bruchid beetles: a review. African J. Ecol. 41: 257-265. https://doi.org/10.1046/j.1365-2028.2003.00451.x
Ruess, R.W. & Halter, F.L. (1990): The impact of large herbivores on the Seronera woodlands, Serengeti National Park, Tanzania. African J. Ecol. 28: 259–275. https://doi.org/10.1111/j.1365-2028.1990.tb01161.x
Setterfield, S.A. (2002): Seedlings establishment in an Australian tropical savanana: effects of seed supply, soil di-sturbance and fire. J. Applied Ecol. 39: 949-956. https://doi.org/10.1046/j.1365-2664.2002.00772.x
Tybirk, K., Schmidt, L.H. & Hauser, T. (1994): Notes on soil seed banks of African Acacias. African J. Ecol. 32: 327-330. https://doi.org/10.1111/j.1365-2028.1994.tb00583.x
Vassal, J. (1998): Les Acacias au Sénégal: Taxonomie, écologie, principaux intérêts. In Ca m p a s, C., gr i g n o n, C., gu e y e, M. & ha m o n, S. (eds.): L’Acacia au Sénégal, Col-loques et Séminaires. Orstoms éditions, Dakar: 19-31. https://www.documentation.ird.fr/hor/fdi:010016066
Vassal, J. (1978): Apport des recherches ontogéniques et sémiologiques à l’étude morphologique taxonomique et phylogénique du genre Acacia. J.T éditions, Toulouse, 128 p.
Walters, M. & Milton, S. J. (2003): The production, sto-rage and viability of seeds of A. karroo and A. nilotica in a grassy savanna in KwaZulu-Natal, South Africa. African J. Ecol. 41: 211-217. https://doi.org/10.1046/j.1365-2028.2003.00433.x
Ward, D. & Rhoner, C. (1996) Anthropogenic causes of high mortality and low recruitment in three Acacia tree taxa in the Negev desert, Israel. Biodiv. Conservation 6: 877-893. https://doi.org/10.1023/b:bioc.0000010408.90955.48
Wezel, A. & Thomas, R. (2002): Resource conservation strategies in agro-ecosystem of semi-arid West Africa. J. Arid Environm. 51: 383-400. https://doi.org/10.1006/jare.2001.0968
Wickens, G.E., Seifeldin, A.G., Guinko, S. & Nahal, I. (1995): Role of Acacia species in the rural economy of dry Africa and the Near Est. Forest Resource Division. FAO, Rome: 134 p.
Wiegand, t. & Jeltsch, F. (2000): Long-term dynamics in arid and semiarid ecosystems –synthesis of a workshop. Plant Ecol. 150: 3-6. https://www.jstor.org/stable/20050974?casa_token=xP4zjxSHmPIAAAAA%3APLSeB2QxGk7FSiwjtQybES5YuDVsZlRGYTUy4FNuz1vVllsTjkkVYTGH74kRnsJRKdOokpEAhQmgVu6cZ-gosLeffX_tJtuSSb_po9mzonJPQOFTSqI&seq=1#metadata_info_tab_contents
Wiegand, K., Ward, D., Thuike, H.H & Jeltsch F. (2000): From snapshot information to long-term population dyna-mics of Acacias by a simulation model. Plant Ecol. 150: 97-114. https://link.springer.com/article/10.1023/A:1026574303048
Wilson, T.B. & Witkowski, E.T.F. (1998): Water require-ments for germination and early seedlings establishment in four African savanna woody plant species. J. Arid Envi-ronm. 38: 541-550. https://doi.org/10.1006/jare.1998.0362
Witkowski, E.T.F. & Garner, R.D. (2000): Spatial distri-bution of soil seed banks of three African savanna woody species at two contrasting sites. Plant Ecol. 149: 91-106. https://link.springer.com/article/10.1023%2FA%3A1009850706843
Wittig, R., Schmidt, M. & Thiombiano, A. (2004): Cartes de distribution des espèces du genre Acacia au Burkina Faso. Etudes flor. vég. Burkina Faso 8: 19-26 https://www.researchgate.net/profile/Marco-Schmidt-3/publication/235112646_Cartes_de_distribution_des_especes_du_genre_Acacia_L_au_Burkina_Faso/links/0912f51077da26913b000000/Cartes-de-distribution-des-especes-du-genre-Acacia-L-au-Burkina-Faso.pdf
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