Density Dependence of a Dominant Species and the Effects on Community Diversity Maintainance

  • 1 Hainan Tropical Ocean University, Sanya 572022, China;
    2 Hainan Agricultural Reclamation Academy of Science, Haikou 570206, China

Received date: 2015-11-12

  Online published: 2016-07-25

Supported by

The Earmarked Fund for China Agriculture Research System; Scientific Research Foundation of Hainan Tropical Ocean University


In order to test whether density dependence influences community diversity, a combination of manipulative experimentation and plot surveys were done using Cryptocarya concinna, a dominant species in subtropical evergreen forest. Twelve pairs of 1 m2 seedling plots were built around 12 adults, and plots were treated monthly with either a fungicide or a control. The surviving proportion of C. concinna seedlings at different stages was calculated, and an analysis was conducted on the impact of fungicide on seedling survival and species richness. Correlation between relative abundance and community evenness at different ages was analyzed using plot surveys. The results showed that fungicide treatment decreased species richness of the seedling community by promoting the recruitment of common species. Furthermore, census of a 25 m radius around adult C. concinna trees confirmed that the density of saplings increased with distance from adults. Relative abundance of C. concinna decreased with increasing age, and decreasing C. concinna dominance resulted in an increase in community evenness. To avoid the appearance of a single optimum population, the dominance of C. concinna decreased with age via density dependence, and subsequently improved community species diversity.

Cite this article

PENG Zongbo, JIANG Ying . Density Dependence of a Dominant Species and the Effects on Community Diversity Maintainance[J]. Journal of Resources and Ecology, 2016 , 7(4) : 275 -280 . DOI: 10.5814/j.issn.1674-764x.2016.04.006


[1] Augspurger C. K., Kelly C. K. 1984. Pathogen mortality of tropical tree seedlings: experimental studies of the effects of dispersal distance, seedling density, and light conditions. Oecologia. 61 (2): 211-217.
[2] Augspurger, C.K. 1984. Seedling Survival of Tropical Tree Species: Interactions of Dispersal Distance, Light-Gaps, and Pathogens. Ecology, 65 (6): 1705-1712.
[3] Bagchi R., T. Swinfield and R.E. Gallery, et al. 2010.Testing the Janzen-Connell mechanism: pathogens cause overcompensating density dependence in a tropical tree. Ecology Letters, 13(10):1262-1269.
[4] Bassar R.D., A Lopez-Sepulcre, D.N. Reznick. 2013. Experimental evidence for density-dependent regulation and selection on Trinidadian guppy life histories. The American Naturalist, 181(1): 25-38.
[5] Bell T., Freckleton R. P., Lewis O. T. 2006. Plant pathogens drive density-dependent seedling mortality in a tropical tree. Ecology Letters. 9(5): 569-574.
[6] Burkey, T.V. 1994. Tropical Tree Species Diversity: A Test of the Janzen-Connell Model. Oecologia, 97 (4): 533-540.
[7] Cintra, R. 1997. A Test of the Janzen-Connell Model with Two Common Tree Species in Amazonian Forest. Journal of Tropical Ecology, 13 (5): 641-658.
[8] Condit R., Hubbell S. P., Foster R. B. 1992. Recruitment Near Conspecific Adults and the Maintenance of Tree and Shrub Diversity in a Neotropical Forest. The American Naturalist. 140 (2): 261-286.
[9] Connell, J. H. 1971. On the role of natural enemies in preventing competitive exclusion in some maring animals and in rain forest trees. Dynamics of populations. 298-312.
[10] Dalling J. W., Swaine M. D., Garwood N. C. 1998. Dispersal patterns and seed bank dynamics of pioneer trees in moist tropical forest. Ecology. 79 (2): 564-578.
[11] Ding Y., R.G. Zang, S.G. Letcher, etal.. 2012. Disturbance regime changes the trait distribution, phylogenetic structure and community assembly of tropical rain forests. Oikos, 121(8): 1263-1270.
[12] Freckleton R. P., Watkinson A. R., Green R. E., Sutherland W. J. 2006. Census error and the detection of density dependence. Journal of Animal Ecology. 75 (4): 837-851.
[13] Gilbert G. S. 2002. Evolutionary ecology of plant diseases in natural ecosystems. Annual Review of Phytopathology. 40 : 13-43.
[14] Gilbert G. S., Burslem D. F. R. P., Pinard M. A., Hartley S. E. 2005. Dimensions of plant disease in tropical forests. Biotic interactions in the tropics: their role in the maintenance of species diversity. UK, Cambridge University Press: 141-164.
[15] Gilbert G. S., Hubbell S. P., Foster R. B. 1994. Density and Distance to Adult Effects of a Canker Disease of Trees in a Moist Tropical Forest. Oecologia. 98 (1): 100-108.
[16] Givnish, T.J. 1999. On the causes of gradients in tropical tree diversity. Journal of Ecology, 87 (2): 193-210.
[17] Harms K. E., Wright S. J., Calderon O., Hernandez A., Herre E. A. 2000. Pervasive density-dependent recruitment enhances seedling diversity in a tropical forest. Nature. 404 (6777): 493-495.
[18] He, F.L. and R.P. Duncan. 2000. Density-dependent effects on tree survival in an old-growth Douglas fir forest. Journal of ecology, 88 (4): 676-688.
[19] Hubbell S.P. 2001. The Unified Neutral Theory of Biodiversity and Biogeography. Princeton, Princeton University Press.
[20] Hubbell, S.P. 1980. Seed Predation and the Coexistence of Tree Species in Tropical Forests. Oikos, 35 (2): 214-229.
[21] Janzen, D.H. 1970. Herbivores and the Number of Tree Species in Tropical Forests. The American Naturalist, 104 (940): 501-528.
[22] Kobe, R.K. and C.F. Vriesendorp. 2011. Conspecific density dependence in seedlings varies with species shade tolerance in a wet tropical forest. Ecology Letters, 14(5): 503-510.
[23] Kotanen, P.M. 2007. Effects of fungal seed pathogens under conspecific and heterospecific trees in a temperate forest. Canadian Journal of Botany-Revue Canadienne De Botanique, 85 (10): 918-925.
[24] Kulmatiski, A., K.H. Beard and J.R. Stevens, et al. 2008. Plant-soil feedbacks: a meta-analytical review. Ecology Letters, 11(9): 980-992.
[25] Li, B.S. and Z. Yuan. 2004. Non-heating sterilization technique and it's application. Beijing, Chemical Industry Press (in Chinese).
[26] Maron, J.L., M. Marler and J.N. Klironomos, et al. 2011. Soil fungal pathogens and the relationship between plant diversity and productivity. Ecology Letters, (14): 36-41.
[27] O'hanlon- Manners, D.L.; Kotanen, P.M. 2006. Losses of seeds of temperate trees to soil fungi: effects of habitat and host ecology. Plant Ecology, 187 (1): 49-58.
[28] Packer, A. and K. Clay 2003. Soil pathogens and Prunus serotina seedling and sapling growth near conspecific trees. Ecology, 84 (1): 108-119.
[29] Peters H. A. 2003. Neighbour-regulated mortality: the influence of positive and negative density dependence on tree populations in species-rich tropical forests. Ecology Letters. 6 (8): 757-765.
[30] Seiwa K., Miwa Y., Sahashi N., Kanno H., Tomita M., Ueno N., Yamazaki M. 2008. Pathogen attack and spatial patterns of juvenile mortality and growth in a temperate tree, Prunus grayana. Canadian Journal of Forest Research-revue Canadienne DE Recherche Forestiere, 38(9): 2445- 2454.
[31] Souza F. M., G.A. Franco and R.M. Callaway. 2013. Strong distance-dependent effects for a spatially aggregated tropical species. Plant Ecology, 214(4): 545-555.
[32] Spiegel O. and R Nathan. 2012. Empirical evaluation of directed dispersal and density-dependent effects across successive recruitment phases. Journal of Ecology, 100(2): 1365-2745.
[33] Stuart T., R. Richard, and T. Brigitte. 2012. Feedback control systems analysis of density dependent population dynamics. Systems & Control Letters, 61( 2): 309-315.
[34] Thomas W. and A Crowther. 2012. Impacts of grazing soil fauna on decomposer fungi are species-specific and density-dependent, Fungal Ecology, 5(2): 277-281.
[35] Volkov, I., J.R. Banavar and F.L. He, et al. 2005. Density dependence explains tree species abundance and diversity in tropical forests. Nature, 438 (7068): 658-661.
[36] Webb C. O., Peart D. R. 1999. Seedling density dependence promotes coexistence of Bornean rain forest trees. Ecology. 80(6): 2006-2017.
[37] Wills C., Condit R. 1999. Similar non-random processes maintain diversity in two tropical rainforests. Proc. R. Soc. Lond. 266 : 1445-1452.
[38] Wills C., Condit R., Foster R. B., Hubbell S. P. 1997. Strong density- and diversity-related effects help to maintain tree species diversity in a neotropical forest. Proceedings of the National Academy of Sciences of the United States of America. 94 (4): 1252-1257.
[39] Wright, S.J. 2002. Plant diversity in tropical forests: a review of mechanisms of species coexistence. Oecologia, 130 (1): 1-14.
[40] Yu, S.X., Y. Li and Y.F. Wang, et al. 2000. Classification of vegetation and its digitized map of Heishiding Nature Reserve, Guangdong. Acta Sci. Nat. Univ. Sunyatseni, 39 (2): 61-66. (in Chinese).
[41] Zeng, M., D.G. Li and J. Yuan, et al. 2004. Effet of the pesticide on Arbuscular Mycorrhizal fungi in the soil of citrus orchard. Mycosystema, 23 (03): 429-433 (in Chinese).
[42] Zhou, X.Y., M.G. Li and B.S. Wang, et al. 1996. Studies on Cryptocarya concinna seedling natality and mortality in Heishiding forest. Ecological Science, 01: 4-8 (in Chinese).