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Temporal and spatial variability in seedling dynamics: a cross-site comparison in four lowland tropical forests

  • Margaret R. Metz (a1), Liza S. Comita (a2), Yu-Yun Chen (a2), Natalia Norden (a3), Richard Condit (a4) (a5), Stephen P. Hubbell (a4), I-Fang Sun (a6), Nur Supardi bin Md. Noor (a7) and S. Joseph Wright (a4)...
Abstract:

Spatial and temporal variation in seedling dynamics was assessed using records of community-wide seedling demography collected with identical monitoring methods at four tropical lowland forests in Panama, Malaysia, Ecuador and French Guiana for periods of between 3 and 10 y. At each site, the fates of between 8617 and 391 777 seedlings were followed through annual censuses of the 370–1008 1-m2 seedling plots. Within-site spatial and inter-annual variation in density, recruitment, growth and mortality was compared with among-site variability using Bayesian hierarchical modelling to determine the generality of each site's patterns and potential for meaningful comparisons among sites. The Malaysian forest, which experiences community-wide masting, was the most variable in both seedling density and recruitment. However, density varied year-to-year at all sites (CVamong years at site = 8–43%), driven largely by high variability in recruitment rates (CV = 40–117%). At all sites, recruitment was more variable than mortality (CV = 5–64%) or growth (CV = 12–51%). Increases in mortality rates lagged 1 y behind large recruitment events. Within-site spatial variation and inter-annual differences were greater than differences among site averages in all rates, emphasizing the value of long-term comparative studies when generalizing how spatial and temporal variation drive patterns of recruitment in tropical forests.

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Corresponding author
1Corresponding author. Email: mmetz@berkeley.edu
References
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AUGSPURGER, C. K. 1983. Seed dispersal of the tropical tree, Platypodium elegans, and the escape of its seedlings from fungal pathogens. Journal of Ecology 71:759771.
BONGERS, F., CHARLES-DOMINIQUE, P., FORGET, P.-M. & THERY, M. (eds). 2001. Nouragues: dynamics and plant animal interactions in a Neotropical rainforest. Kluwer Academic Publishers, Dordrecht. 421 pp.
CHEN, Y. 2007. Reproductive phenology in a lowland dipterocarp forest and its consequences for seedling recruitment. PhD thesis, University of Georgia, Athens, GA, USA.
CHESSON, P. L. 1985. Coexistence of competitors in spatially and temporally varying environments: a look at the combined effects of different sorts of variability. Theoretical Population Biology 28:263287.
CLARK, J. S. 2005. Why environmental scientists are becoming Bayesians. Ecology Letters 8:214.
CONDIT, R. 1995. Research in large, long-term tropical forest plots. Trends in Ecology and Evolution 10:1822.
CONDIT, R., ASHTON, P. S., MANOKARAN, N., LAFRANKIE, J. V., HUBBELL, S. P. & FOSTER, R. B. 1999. Dynamics of the forest communities at Pasoh and Barro Colorado: comparing two 50-ha plots. Philosophical Transactions of the Royal Society B 354:17391748.
CONDIT, R., AGUILAR, S., HERNANDEZ, A., PEREZ, R., LAO, S., ANGEHR, G., HUBBELL, S. P. & FOSTER, R. B. 2004. Tropical forest dynamics across a rainfall gradient and the impact of an El Niño dry season. Journal of Tropical Ecology 20:5172.
CONDIT, R., ASHTON, P., BUNYAVEJCHEWIN, S., DATTARAJA, H. S., DAVIES, S., ESUFALI, S., EWANGO, C., FOSTER, R., GUNATILLEKE, I. A U. N., GUNATILLEKE, C. V. S., HALL, P., HARMS, K. E., HART, T., HERNANDEZ, C., HUBBELL, S., ITOH, A., KIRATIPRAYOON, S., LAFRANKIE, J., DE LAO, S. L., MAKANA, J. R., NOOR, M. N. S., KASSIM, A. R., RUSSO, S., SUKUMAR, R., SAMPER, C., SURESH, H. S., TAN, S., THOMAS, S., VALENCIA, R., VALLEJO, M., VILLA, G. & ZILLIO, T. 2006. The importance of demographic niches to tree diversity. Science 313:98101.
CONNELL, J. H. 1971. On the role of natural enemies in preventing competitive exclusion in some marine animals and in rain forest trees. Pp. 298312 in denBoer, P. J. Boer, P. J. & Gradwell, G. R. (eds.). Dynamics of populations. PUDOC Wageningen.
CONNELL, J. H. & GREEN, P. T. 2000. Seedling dynamics over thirty-two years in a tropical rain forest tree. Ecology 81:568584.
CORLETT, R. T. & PRIMACK, R. B. 2006. Tropical rainforests and the need for cross-continental comparisons. Trends in Ecology and Evolution 21:104110.
CURRAN, L. M. & WEBB, C. O. 2000. Experimental tests of the spatiotemporal scale of seed predation in mast-fruiting Dipterocarpaceae. Ecological Monographs 70:129148.
DALLING, J. W., HUBBELL, S. P. & SILVERA, K. 1998. Seed dispersal, seedling establishment and gap partitioning among tropical pioneer trees. Journal of Ecology 4:674689.
DALLING, J. W., MULLER-LANDAU, H. C., WRIGHT, S. J. & HUBBELL, S. P. 2002. Role of dispersal in the recruitment limitation of neotropical pioneer species. Journal of Ecology 90:714727.
DESTEVEN, D. & WRIGHT, S. J. 2002. Consequences of variable reproduction for seedling recruitment in three neotropical species. Ecology 83:23152327.
FRAGOSO, J. V. M. 1997. Tapir-generated seed shadows: scale-dependent patchiness in the Amazon rain forest. Journal of Ecology 85:519529.
GILBERT, G. S. 2002. Evolutionary ecology of plant diseases in natural ecosystems. Annual Review of Phytopathology 40:1343.
GILKS, W. R., RICHARDSON, S. & SPIEGELHALTER, D. J. (eds.) 1996. Markov Chain Monte Carlo in practice. Chapman & Hall/CRC Press, Boca Raton. 512 pp.
GRUBB, P. J. 1977. The maintenance of species richness in plant communities: the importance of the regeneration niche. Biological Reviews 52:107145.
HALL, J. S., ASHTON, M. S. & BERLYN, G. P. 2003. Seedling performance of four sympatric Entandrophragma species (Meliaceae) under simulated fertility and moisture regimes of a Central African rain forest. Journal of Tropical Ecology 19:5566.
HARMS, K. E., WRIGHT, S. J., CALDERÓN, O., HERNÁNDEZ, A. & HERRE, E. A. 2000. Pervasive density-dependent recruitment enhances seedling diversity in a tropical forest. Nature 404:493495.
HARMS, K. E., POWERS, J. S. & MONTGOMERY, R. A. 2004. Variation in small sapling density, understory cover, and resource availability in four Neotropical forests. Biotropica 36:4051.
HUBBELL, S. P., FOSTER, R. B., O'BRIEN, S. T., HARMS, K. E., CONDIT, R., WECHSLER, B., WRIGHT, S. J. & LOO DE LAO, S. 1999. Light-gap disturbances, recruitment limitation, and tree diversity in a neotropical forest. Science 283:554557.
JANZEN, D. H. 1970. Herbivores and the number of tree species in tropical forests. The American Naturalist 104:501528.
JULLIOT, C. 1997. Impact of seed dispersal by red howler monkeys Alouatta seniculus on the seedling population in the understorey of tropical rain forest. Journal of Ecology 85:431440.
LAFRANKIE, J. V., ASHTON, P. S., CHUYONG, G. B., CO, L., CONDIT, R., DAVIES, S. J., FOSTER, R., HUBBELL, S. P., KENFACK, D., LAGUNZAD, D., LOSOS, E. C., NOR, N. S. M., TAN, S., THOMAS, D. W., VALENCIA, R. & VILLA, G. 2006. Contrasting structure and composition of the understory in species-rich tropical rain forests. Ecology 87:22982305.
LOSOS, E. C. & LEIGH, E. G. (eds.) 2004. Tropical forest diversity and dynamism: findings from a large-scale plot network. University of Chicago Press, Chicago. 645 pp.
MAKANA, J. & THOMAS, S. C. 2004. Dispersal limits natural recruitment of African mahoganies. Oikos 106:6772.
MALHI, Y. & WRIGHT, J. 2004. Spatial patterns and recent trends in the climate of tropical rainforest regions. Philosophical Transactions of the Royal Society of London Series B-Biological Sciences 359:311329.
MALHI, Y., PHILLIPS, O. L., LLOYD, J., BAKER, T., WRIGHT, J., ALMEIDA, S., ARROYO, L., FREDERIKSEN, T., GRACE, J., HIGUCHI, N., KILLEEN, T., LAURANCE, W. F., LEAÑO, C., LEWIS, S., MEIR, P., MONTEAGUDO, A., NEILL, D., NÚÑEZ VARGAS, P., PANFIL, S. N., PATIÑO, S., PITMAN, N., QUESADA, C. A., RUDAS-LL, A., SALOMÃO, R., SALESKA, S., SILVA, N., SILVEIRA, M., SOMBROEK, W. G., VALENCIA, R., VÁSQUEZ MARTÍNEZ, R., VIEIRA, I. C. G. & VINCETI, B. 2002. An international network to monitor the structure, composition and dynamics of Amazonian forests (RAINFOR). Journal of Vegetation Science 13:439450.
MONTGOMERY, R. A. & CHAZDON, R. l. 2002. Light gradient partitioning by tropical tree seedlings in the absence of canopy gaps. Oecologia 131:165174.
MULLER-LANDAU, H. C., LEVIN, S. A. & KEYMER, J. E. 2003. Theoretical perspectives on evolution of long-distance dispersal and the example of specialized pests. Ecology 84:19571967.
NATHAN, R. & MULLER-LANDAU, H. C. 2002. Spatial patterns of seed dispersal, their determinants and consequences for recruitment. Trends in Ecology and Evolution 15:278285.
NORDEN, N., CHAVE, J., CAUBERE, A., CHATELET, P., FERRONI, N., FORGET, P.-M. & THEBAUD, C. 2007. Is temporal variation of seedling communities determined by environment or by seed arrival? A test in a neotropical forest. Journal of Ecology 95:507516.
PALMIOTTO, P. A., DAVIES, S. J., VOGT, K. A., ASHTON, M. S., VOGT, D. J. & ASHTON, P. S. 2004. Soil-related habitat specialization in dipterocarp rain forest tree species in Borneo. Journal of Ecology 92:609623.
PAZ, H. 2003. Root/shoot allocation and root architecture in seedlings: variation among forest sites, microhabitats, and ecological groups. Biotropica 35:318332.
PERSSON, V. 2006. Effects of climatic seasonality on reproductive phenology of tropical forest plants. PhD thesis, University of Aberdeen, Aberdeen, UK.
PITMAN, N. C. A., TERBORGH, J. W., SILMAN, M. R., NUÑEZ, P., NEILL, D. A., CERÓN, C., PALACIOS, W. A. & AULESTIA, M. 2002. A comparison of tree species diversity in two upper Amazonian forests. Ecology 83:32103244.
PRIMACK, R. B. & CORLETT, R. T. 2005. Tropical rain forests: an ecological and biogeographical comparison. Blackwell Sciences, New York. 319 pp.
SAKAI, S. 2002. General flowering in lowland mixed dipterocarp forests of South-east Asia. Biological Journal of the Linnean Society 75:233247.
SAKAI, S., HARRISON, R. D., MOMOSE, K., KURAJI, K., NAGAMASU, H., YASUNARI, T., CHONG, L. & NAKASHIZUKA, T. 2006. Irregular droughts trigger mass flowering in aseasonal tropical forests in Asia. American Journal of Botany 93:11341139.
SCHUPP, E. W. 1988. Seed and early seedling predation in the forest understory and in treefall gaps. Oikos 51:7178.
SCHUPP, E. W. 1990. Annual variation in seedfall, postdispersal predation, and recruitment of a Neotropical tree. Ecology 71:504515.
SUN, I., CHEN, Y., HUBBELL, S. P., WRIGHT, S. J. & NOOR, N. S. 2007. Seed predation during general flowering events of varying magnitude in a Malaysian rain forest. Journal of Ecology 95:818827.
TER STEEGE, H., PITMAN, N., SABATIER, D., CASTELLANOS, H., VAN DER HOUT, P., DALY, D. C., SILVEIRA, M., PHILLIPS, O., VASQUEZ, R., VAN ANDEL, T., DUIVENVOORDEN, J., DE OLIVEIRA, A. A., EK, R., LILWAH, R., THOMAS, R., VAN ESSEN, J., BAIDER, C., MAAS, P., MORI, S., TERBORGH, J., VARGAS, P. N., MOGOLLON, H. & MORAWETZ, W. 2003. A spatial model of tree alpha-diversity and tree density for the Amazon. Biodiversity and Conservation 12:22552277.
URIARTE, M., CANHAM, C. D., THOMPSON, J., ZIMMERMAN, J. K. & BROKAW, N. 2005. Seedling recruitment in a hurricane-driven tropical forest: light limitation, density-dependence and the spatial distribution of parent trees. Journal of Ecology 93:291304.
WEBB, C. O. & PEART, D. R. 1999. Seedling density dependence promotes coexistence of Bornean rain forest trees. Ecology 80:20062017.
WILLS, C. & CONDIT, R. 1999. Similar non-random processes maintain diversity in two tropical rainforests. Proceedings of the Royal Society B 266:14451452.
WRIGHT, S. J. 2002. Plant diversity in tropical forests: a review of mechanisms of species coexistence. Oecologia 130:114.
WRIGHT, S. J. & CALDERÓN, O. 1995. Phylogenetic patterns among tropical flowering phenologies. Journal of Ecology 83:937948.
WRIGHT, S. J. & CALDERÓN, O. 2006. Seasonal, El Niño and longer term changes in flower and seed production in a moist tropical forest. Ecology Letters 9:3544.
WRIGHT, S. J., CARRASCO, C., CALDERÓN, O. & PATON, S. 1999. The El Nino Southern Oscillation, variable fruit production, and famine in a tropical forest. Ecology 80:16321647.
WRIGHT, S. J., MULLER-LANDAU, H. C., CALDERÓN, O. & HERNANDEZ, A. 2005. Annual and spatial variation in seedfall and seedling recruitment in a neotropical forest. Ecology 86:848860.
ZIMMERMAN, J. K., WRIGHT, S. J., CALDERÓN, O., PAGAN, M. A. & PATON, S. 2007. Flowering and fruiting phenologies of seasonal and aseasonal neotropical forests: the role of annual changes in irradiance. Journal of Tropical Ecology 23:231251.
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