biodiversity reservoirs; land use types; logging, natural regeneration; soil depth; south-eastern Cameroon
Résumé :
[en] Regeneration of tropical forest occurs naturally and mainly through early secondary succession by soil seed banks. Here, we analyzed seed bank variation in density anddiversity along a degradation gradient. We also explored the relationship (similarity incomposition) between the seed and seedling banks and the overstory vegetation. The investigated forests were located at Dja Fauna Reserve and its surroundings, south-easternCameroon. We sampled 33 one-haforest plots scattered in a protected area,in a logging concession and in community forests. Within each plot, we inventoriedthe seed bank in the litter and in four successive soil layers of 5 cm depth interval, andthe standing vegetation. Seed density significantly varied with sampling depth but not between land use types. A total of 181 morphospecies were identified. Trees species accounted for 46% of seeds with pioneer species dispersed by animals dominating the seed bank. Species diversity and composition strongly varied with the sampling depth; the litter seed bank was more similar in composition to the soil seed bank than to the seedling bank, sapling, and forest stands. We highlighted the presence of a dense and diverse seed bank in each land use type. We also showed the differentiation of each sampling depth in terms of species composition, thus revealing their complementarity in the dynamics of natural regeneration. The dominance of pioneers in the seed bank and weak relationship with the overstory are universal for tropical forests and logically follow from forest succession after disturbance.
Akinyemi, D.S., Oseni, S.R., Oke, S.O., Effect of heat on soil seedbank of three contrasting physiognomies in Shasha forest reserve, Southwestern Nigeria (2018) Acta Oecologica, 20. , https://doi.org/10.1016/j.actao.2018.03.009
Alvarez-Aquino, C., Williams-Linera, G., Newton, A., Disturbance effects on the seed bank of Mexican cloud forest fragments (2005) Biotropica, 37 (3), pp. 337-342. , https://doi.org/10.1111/j.1744-7429.2005.00044.x
Bates, D.M., (2016) Package ‘ lme4, ’ (November)
Bekker, R.M., Bakker, J.P., Grandin, U., Kalamees, R., Milberg, P., Poschlod, P., Thompson, K., Willems, J.H., Seed size, shape and vertical distribution in the soil: Indicators of seed longevity (1998) Functional Ecology, 12 (5), pp. 834-842. , https://doi.org/10.1046/j.1365-2435.1998.00252.x
Calster, H.V., Chevalier, R., Wyngene, B.V., Archaux, F., Hermy, M., Calster, V., Wyngene, V., Long-term seed bank dynamics in a temperate forest under conversion from coppice-with-standards to high forest management (2008) Applied Vegetation Science, 11 (2), pp. 251-260. , https://doi.org/10.3170/2008-7-18405
Chen, H., Cao, M., Tang, Y., Soil seed banks in plantations and tropical seasonal rainforests of Xishuangbanna, Southwest China (2013) Journal of Tropical Forest Science, 25 (3), pp. 375-386
Chen, S.C., Tamme, R., Thomson, F.J., Moles, A.T., Seeds tend to disperse further in the tropics (2019) Ecology Letters, 22 (6), pp. 954-961. , https://doi.org/10.1111/ele.13255
Christoffoleti, P.J., Caetano, R.S.X., Soil seed banks (1998) Scientia Agricola, 55 (spe), pp. 74-78. , https://doi.org/10.1590/S0103-90161998000500013
Daïnou, K., Bauduin, A., Bourland, N., Gillet, J.-F., Fétéké, F., Doucet, J.-L., Soil seed bank characteristics in Cameroonian rainforests and implications for post-logging forest recovery (2011) Ecological Engineering, 37 (10), pp. 1499-1506. , https://doi.org/10.1016/j.ecoleng.2011.05.004
Dalling, J.W., Brown, T.A., Long-term persistence of pioneer species in tropical rain forest soil seed banks (2009) The American Naturalist, 173 (4), p. 5. , https://doi.org/10.1086/597221
Dalling, J.W., Denslow, J.S., Soil seed bank composition along a forest chronosequence in seasonally moist tropical forest, Panama (1998) Journal of Vegetation Science, 9 (5), pp. 669-678. , https://doi.org/10.2307/3237285
Dalling, J.W., Swaine, M.D., Garwood, N.C., Effect of soil depth on seedling emergence in tropical soil seed-bank investigations (1994) Functional Ecology, 9 (1), p. 119. , https://doi.org/10.2307/2390098
Dalling, J.W., Swaine, M.D., Garwood, N.C., Soil seed bank community dynamics in seasonally moist lowland tropical forest, Panama (1997) Journal of Tropical Ecology, 13 (1997), pp. 659-680. , https://doi.org/10.1017/S0266467400010853
De Medeiros-Sarmento, P.S., Valle Ferreira, L., Gastauer, M., Natural regeneration triggers compositional and functional shifts in soil seed banks (2020) Sci Total Environ., 753, p. 9. , https://doi.org/10.1016/j.scitotenv.2020.141934
Doucet, J.-L., (2003) L’alliance délicate de la gestion forestière et de la biodiversité dans les forêts du centre du Gabon, , Communaute Francaise de Belgique
Douh, C., Daïnou, K., Joël Loumeto, J., Moutsambote, J.-M., Fayolle, A., Tosso, F., Forni, E., Doucet, J.-L., Soil seed bank characteristics in two central African forest types and implications for forest restoration (2018) Forest Ecology and Management, 409, pp. 766-776. , https://doi.org/10.1016/j.foreco.2017.12.012
Douh, C., Daïnou, K., Loumeto, J.J., Fayolle, A., Explorer la banque de graines du sol pour mieux comprendre la dynamique de régénération des forêts tropicales africaines (synthèse bibliographique) (2014) Biotechnologie, Agronomie, Societe Et Environnement, 18 (4), p. 8
Drake, D.R., Relationships among the seed rain, seed bank and vegetation of a Hawaiian forest (1998) Journal of Vegetation Science, 9 (1), pp. 103-112. , https://doi.org/10.2307/3237228
Dufrene, M., Legendre, P., Species assemblages and indicator species: The need for a flexible asymmetrical approach (1997) Ecological Society of America, 67 (3), pp. 345-366. , https://doi.org/10.2307/2963459
Dupuy, J.M., Chazdon, R.L., Long-term effects of forest regrowth and selective logging on the seed bank of tropical forests in NE Costa Rica (1998) Biotropica, 30 (2), pp. 223-237. , https://doi.org/10.1111/j.1744-7429.1998.tb00057.x
Faith, D.P., Minchin, P.R., Belbin, L., Compositional dissimilarity as a robust measure of ecogical distance (1987) Vegetatio, 69, pp. 57-68. , https://doi.org/10.1007/bf00038687
Fayolle, A., Picard, N., Doucet, J.L., Swaine, M., Bayol, N., Bénédet, F., Gourlet-Fleury, S., A new insight in the structure, composition and functioning of central African moist forests (2014) Forest Ecology and Management, 329, pp. 195-205. , https://doi.org/10.1016/j.foreco.2014.06.014
Fenner, M.K., Thompson, K., (2005) The ecology of seeds, , https://books.google.be/books?id=bzflp9q5tNIC&dq=The+ecology+of+seeds+.pdf&lr=&hl=fr&source=gbs_navlinks_s, Cambridge University Press, 250. Retrieved from
Fick, S.E., Hijmans, R.J., WorldClim 2: New 1-km spatial resolution climate surfaces for global land areas (2017) International Journal of Climatology, 37 (12), pp. 4302-4315. , https://doi.org/10.1002/joc.5086
Garwood, N.C., Tropical soil seed banks: A review (1989) Ecology of Soil Seed Banks, 149, p. 210. , https://doi.org/10.1016/B978-0-12-440405-2.50014-2
Hall, J.B., Swaine, M.D., Seed stocks in Ghanaian forest soils (1980) Biotropica, 12 (4), pp. 256-263. , https://doi.org/10.2307/2387695
Hawthorne, W.D., Ecological profiles of Ghanaian forest trees (1995) Tropical Forestry Papers, 29, p. 345
Hopfensperger, K.N., A review of similarity between seed bank and standing vegetation across ecosystems (2007) Oikos, 116 (9), pp. 1438-1448. , https://doi.org/10.1111/j.2007.0030-1299.15818.x
Hopkins, M.S., Graham, A.W., The viability of seeds of rainforest species after experimental soil burials under tropical wet lowland forest in northeastern Australia (1987) Australian Journal of Ecology, 12, pp. 97-108. , https://doi.org/10.1111/j.1442-9993.1987.tb00932.x
Hosogi, D., Kameyama, A., Timing for the planting method using deciduous forest topsoil in surburban Tokyo (2006) Ecological Engineering, 26, pp. 123-131
Howe, H.F., Smallwood, J., Ecology of seed dispersal (1982) Annual Review of Ecology and Systematics, 13 (1982), pp. 201-228. , https://doi.org/10.1146/annurev.es.13.110182.001221
Kitajima, K., Fenner, M., Ecology of seedling regeneration (2000) Seed: The ecology of regeneration in plant communities, pp. 331-360. , M. Fenner, (Ed.),, CAB International
Lambers, J.H.R., Clark, J.S., Lavine, M., Implications of seed banking fore recruitment of southern Apalachian woody species (2005) Ecology, 86 (1), pp. 85-95. , https://doi.org/10.1890/03-0685
Leck, M.A., Leck, C.F., A ten-year seed bank study of old field succession in central New Jersey (1998) Journal of the Torrey Botanical Society, 125 (1), pp. 11-32. , https://doi.org/10.2307/2997228
Lemauviel, S., Roze, F., Clement, B., A study of the dynamics of the seed banks in a complex dune system, with aim to restoration (2005) Journal of Coastal Research, 21, pp. 991-999
Letouzey, R., Domaine de la forêt dense humide semi-caducifoliée (1985) Notice de la carte phytogéographique du Cameroun au 1:500 000, pp. 63-94. , (Institut d, Institut de la Carte Internationale de la Végétation, Toulouse, France
Lhoest, S., Fonteyn, D., Daïnou, K., Delbeke, L., Doucet, J.L., Dufrêne, M., Fayolle, A., Conservation value of tropical forests: Distance to human settlements matters more than management in Central Africa (2020) Biological Conservation, 241, p. 108351. , https://doi.org/10.1016/j.biocon.2019.108351, (November 2019)
Liew, T., Occurrence of seeds in virgin forest top soil with particular reference to secondary species in Sabah (1973) Malaysian Forester, 36, pp. 185-193
Lipoma, M.L., Fortunato, V., Enrico, L., Díaz, S., Where does the forest come back from? Soil and litter seed banks and the juvenile bank as sources of vegetation resilience in a semiarid Neotropical forest (2019) Journal of Vegetation Science, 31 (6), pp. 1017-1027. , https://doi.org/10.1111/jvs.12842
Long, R.L., Gorecki, M.J., Renton, M., Scott, J.K., Colville, L., Goggin, D.E., Commander, L.E., Finch-Savage, W.E., The ecophysiology of seed persistence: A mechanistic view of the journey to germination or demise (2014) Biological Reviews, 90 (1), pp. 31-59. , https://doi.org/10.1111/brv.12095
Martins, A.M., Engel, V.L., Soil seed banks in tropical forest fragments with different disturbance histories in southeastern Brazil (2007) Ecological Engineering, 31 (3), pp. 165-174. , https://doi.org/10.1016/j.ecoleng.2007.05.008
Mendoza, I., Gómez-Aparicio, L., Zamora, R., Matías, L., Recruitment limitation of forest communities in a degraded Mediterranean landscape (2009) Journal of Vegetation Science, 20 (2), pp. 367-376. , https://doi.org/10.1111/j.1654-1103.2009.05705.x
Meunier, Q., Moumbogou, C., Doucet, J.-L., (2015) Les Arbres Utiles du Gabon, , Les Presses Agronomiques de Gembloux
Morin-Rivat, J., Fayolle, A., Favier, C., Bremond, L., Gourlet-Fleury, S., Bayol, N., Lejeune, P., Doucet, J.-L., Present-day central African forest is a legacy of the 19th century human history (2017) Elife, 6, pp. 1-18. , https://doi.org/10.7554/eLife.20343
Mosnier, A., Mant, R., Pirker, J., Bodin, B., Bokelo, D., Tonga, P., Havlik, P., Tadoum, M., (2016) Futures émissions issues de la déforestation et de la dégradation forestière et impacts sur la biodiversité : un modèle économique spatial pour la République Démocratique du Congo
Nicotra, A.B., Chazdon, R.L., Iriarte, S.V.B., Spatial heterogeneity of light and wood seedling regeneration in tropical wet forests (1998) Ecology, 80 (6), pp. 1908-1926
Oksanen, A.J., Blanchet, F.G., Friendly, M., Kindt, R., Legendre, P., Mcglinn, D., Szoecs, E., (2019) Package ‘ vegan
Quintana-Ascencio, P.F., Gonzalez-Espinosa, M., Ramirez-Marcial, N., Dominguez-Vazquez, G., Martinez-Ico, M., Soil seed banks and regeneration of tropical rain forest from Milpa fields at the Selva Lacandona, Chiapas, Mexico (1996) Biotropica, 28 (2), p. 19. , https://doi.org/10.2307/2389074
(2017) A language and environment for statistical computing, , R Foundation for Statistical Computing
Ripley, B., Venables, B., Bates, D.M., Hornik, K., Gebhardt, A., Firth, D., (2020) Functions and datasets to support Venables and Ripley, “Modern Applied Statistics with S”, , http://www.stats.ox.ac.uk/pub/MASS4/, (4th edition, 2002). Retrieved from
Sanou, L., Savadogo, P., Zida, D., Thiombiano, A., Contrasting land use systems influence soil seed bank composition and density in a rural landscape mosaic in West Africa (2019) Flora, 250, pp. 79-90. , https://doi.org/10.1016/j.flora.2018.11.013
Saulei, S.M., Swaine, M.D., Rain forest seed dynamics during succession at Gogol, Papua New Guinea (1988) The Journal of Ecology, 76 (4), p. 1133. , https://doi.org/10.2307/2260639
Schwienbacher, E., Marcante, S., Erschbamer, B., Alpine species seed longevity in the soil in relation to seed size and shape – A 5-year burial experiment in the Central Alps (2010) Flora: Morphology, Distribution, Functional Ecology of Plants, 205 (1), pp. 19-25. , https://doi.org/10.1016/j.flora.2008.10.007
Segalen, P., Les sols et la géomorphologie du Cameroun. Cahiers ORSTOM.Série (1967) Pédologie, 5 (2), pp. 137-187
Shen, Y.-X., Liu, W.-L., Li, Y.-H., Guan, H.-L., Large sample area and size are needed for forest soil seed bank studies to ensure low discrepancy with standing vegetation (2014) PLoS One, 9 (8). , https://doi.org/10.1371/journal.pone.0105235
Swaine, M.D., Hall, J.B., The mosaic theory of forest regeneration and the determination of forest composition in Ghana (1988) Journal of Tropical Ecology, 4 (3), pp. 253-269. , https://doi.org/10.1017/S0266467400002819
Ter Heerdt, G.N.J., Verweij, G.L., Bekker, R.M., Bakker, J.P., An improved method for seed-bank analysis: Seedling emergence after removing the soil by sieving (1996) Functional Ecology, 10 (1), p. 144. , https://doi.org/10.2307/2390273
Vancutsem, C., Achard, F., Pekel, J.-F., Vieilledent, G., Carboni, S., Simonetti, D., Gallego, J., Nasi, R., Long-term (1990–2019) monitoring of forest cover changes in the humid tropics (2021) Science Advances, 7 (10), pp. 1-22. , https://doi.org/10.1126/sciadv.abe1603
Weerasinghe, M., Ashton, M.S., Hooper, E.R., Singhakumara, B.M.P., Floristics of soil seed banks on agricultural and disturbed land cleared of tropical forests (2019) Restoration Ecology, 27 (1), pp. 138-147. , https://doi.org/10.1111/rec.12711
Young, K.R., Ewel, J.J., Brown, B.J., Seed dynamics during forest succession in Costa Rica (1987) Vegetatio, 71 (3), pp. 157-173. , https://doi.org/10.1007/BF00039168
Zebaze, D.D., (2014) Etude de la banque de graines de quelques parcelles permanentes de la localité de Mindourou, , Université de Yaoundé I
Zebaze, D., Fayolle, A., Daïnou, K., Libalah, M., Droissart, V., Sonké, B., Doucet, J.-L., Data from: Land use has little influence on the soil seed bank in a central African moist forest (2021) Dryad Digital Repository, , https://doi.org/10.5061/dryad.gtht76hng