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Litter as a filter of emergence for herbaceous seedlings and sporophytes in central Amazonia

  • Flávio Rogério de Oliveira Rodrigues (a1) and Flávia Regina Capellotto Costa (a2)

Abstract:

We conducted a study in 30 plots distributed uniformly in an area of 25 km2 at Ducke Reserve, Manaus, to test the hypothesis that understorey herb richness and abundance are mediated by litter, manipulating experimentally the amount of litter in the field. Over 10 mo, we followed the emergence of herbaceous seedlings and sporophytes in control, litter-addition and litter-exclusion treatments, covering an area of 1.2 m2 per plot in each treatment. We also assessed the relationship between topography and litter depth and frequency of bare-soil patches; and the influence of density of reproductive individuals on the emergence of herbs. Litter depth decreased, and the frequency of bare-soil patches increased with terrain slope in the wet season, but were not related with the soil clay content. Neither was related to the topography in the dry season. Emergence of pteridophytes was four times higher in the litter-exclusion treatment (3.7 ± 1.1 individuals m−2) than in the litter-addition treatment (0.9 ± 0.28 indiv. m−2) and increased with soil clay content. Seedlings from monocot herbs emerged twice more frequently in the litter exclusion (0.71 ± 0.25 indiv. m−2) than in the litter-addition treatment (0.33 ± 0.11 indiv. m−2), and also more in sites with high density of fruiting plants. The results are consistent with the hypothesis that regeneration of herbs with very small propagules is strongly affected by the physical barrier imposed by litter. Given that litter is shallower on slopes during the wet season, this creates a pattern of higher density and richness of pteridophytes in these areas. Monocot herbs, although also limited by litter, were more highly limited by availability of propagules, and their distribution patterns are at least in part explained by dispersal limitation. We conclude that litter is an important causal factor behind the herb distribution patterns along topographical gradients.

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Corresponding author

1Corresponding author. Email: frdor85@gmail.com

References

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BANKS, J. A. 1999. Gametophyte development in ferns. Annual Review of Plant Physiology and Plant Molecular Biology 50:163186.
BECKER, P., RABENOLD, P. E., IDOL, J. R. & SMITH, A. P. 1988. Water potential gradients for gaps and slopes in a Panamanian tropical moist forest's dry season. Journal of Tropical Ecology 4:173184.
BELL, G. 2001. Neutral macroecology. Science 293:24132418.
BENÍTEZ-MALVIDO, J. & KOSSMANN-FERRAZ, I. D. 1999. Litter cover variability affects seedling performance and herbivory. Biotropica 31:598606.
BOSY, J. L. & READER, R. J. 1995. Mechanisms underlying the suppression of forb seedling emergence by grass (Poa pratensis) litter. Functional Ecology 9:635639.
BREARLEY, F. Q., PRESS, M. C. & SCHOLES, J. D. 2003. Nutrients obtained from leaf litter can improve the growth of dipterocarp seedlings. New Phytologist 160:101110.
BRUNA, E. M. 1999. Seed germination in rain forest fragments. Nature 402:139.
BRUNA, E. M. 2002. Effects of forest fragmentation on Heliconia acuminata seedling recruitment in central Amazonia. Oecologia 132:235243.
BRUNA, E. M. & RIBEIRO, M. B. N. 2005. Regeneration and population structure of Heliconia acuminata in Amazonian secondary forests with contrasting land-use histories. Journal of Tropical Ecology 21:127131.
CHAUVEL, A., LUCAS, Y. & BOULET, R., 1987. On the genesis of the soil mantle of the region of Manaus, central Amazonia, Brazil. Experientia 43:234241.
CINTRA, R. 1997. Leaf litter effects on seed and seedling predation of the palm Astrocaryum murumuru and the legume tree Diptryx micrantha in Amazonian forest. Journal of Tropical Ecology 13:709725.
CLARK, D. B., CLARK, D. A. & READ, J. M. 1998. Edaphic variation and the mesoscale distribution of tree species in a neotropical rain forest. Journal of Ecology 86:101112.
CLARK, D. B., PALMER, M. W. & CLARK, D. A. 1999. Edaphic factors and the landscape-scale distributions of tropical rain forest trees. Ecology 80:26622675.
COMITA, L. S. & ENGELBRECHT, B. M. J. 2009. Seasonal and spatial variation in water availability drive habitat associations in a tropical forest. Ecology 90:27552765.
COSTA, F. R. C. 2006. Mesoscale gradients of herb richness and abundance in central Amazonia. Biotropica 38:711717.
COSTA, F. R. C. & MAGNUSSON, W. E. 2010. The need for large-scale, integrated studies of biodiversity – the experience of the Program for Biodiversity Research in Brazilian Amazonia. Natureza & Conservação 8:312.
COSTA, F. R. C., MAGNUSSON, W. E. & LUIZÃO, R. C. C. 2005. Mesoscale distribution patterns of Amazonian understorey herbs in relation to topography, soil and watersheds. Journal of Ecology 93:863878.
DAVIDSE, G., JUDZIEWICZ, E. J. & ZULOAGA, F. O. 2004. Poaceae. Pp. 1297 in Berry, P. E., Yatskievych, K. & Holst, B. K. (eds.). Flora of the Venezuelan Guayana. Volume 8. Missouri Botanical Garden Press, St. Louis.
DAWS, M. I., PEARSON, T. R. H., BURSLEM, D. F. R. P., MULLINS, C. E. & DALLING, J. W. 2005. Effects of topographic position, leaf litter and seed size on seedling demography in a semideciduous tropical forest in Panamá. Plant Ecology 179:93105.
DRUCKER, D. P., COSTA, F. R. C. & MAGNUSSON, W. E. 2008. How wide is the riparian zone of small streams in tropical forests? A test with terrestrial herbs. Journal of Tropical Ecology 24:6574.
EHRLÉN, J. & ERIKSSON, O. 2000. Dispersal limitation and patch occupancy in forest herbs. Ecology 81:16671674.
ENGELBRECHT, B. M. J., COMITA, L. S., CONDIT, R., KURSAR, T. A., TYREE, M. T., TURNER, B. L. & HUBBELL, S. P. 2007. Drought sensitivity shapes species distribution patterns in tropical forests. Nature 447:8082.
FACELLI, J. M. 1994. Multiple indirect effects of plant litter affect the establishment of woody seedlings in old fields. Ecology 75:17271735.
FACELLI, J. M. & PICKETT, S. T. A. 1991a. Plant litter: light interception and effects on an old-field plant community. Ecology 72:10241031.
FACELLI, J. M. & PICKETT, S. T. A. 1991b. Plant litter: its dynamics and effects on plant community structure. The Botanical Review 57:132.
FOWLER, N. L. 1988. What is a safe site? Neighbor, litter, germination date, and patch effects. Ecology 69:947961.
FURUYA, M., KANNO, M., OKAMOTO, H., FULUDA, S. & WADA, M. 1997. Control of mitosis by phytochrome and a blue-light receptor in fern spores. Plant Physiology 113:677683.
GALE, N. 2000. The relationship between canopy gaps and topography in a western Ecuadorian rain forest. Biotropica 32:653661.
GARCÍA-GUZMÁN, G. & BENITEZ-MALVIDO, J. 2003. Effect of litter on the incidence of leaf-fungal pathogens and herbivory in seedlings of the tropical tree Nectandra ambigens. Journal of Tropical Ecology 19:171177.
GENTRY, A. H. 1988. Chances in plant community diversity and floristic composition on environmental and geographical gradients. Annals of the Missouri Botanical Garden 75:134.
GENTRY, A. H. & EMMONS, L. H. 1987. Geographical variation in fertility and composition of the understory of Neotropical forests. Biotropica 19:216227.
HOVSTAD, K. A. & OHLSON, M. 2009. Conspecific versus heterospecific litter on seedling establishment. Plant Ecology 204:3342.
HUBBELL, S. P. 2001. The unified neutral theory of biodiversity and biogeography. Princeton Monographs in Population Biology. Princeton University Press, Princeton. 375 pp.
JENSEN, K. & GUTEKUNST, K. 2003. Effects of litter on establishment of grassland plant species: the role of seed size and successional status. Basic and Applied Ecology 4:579587.
KENNEDY, H., ANDERSON, L. G. & HAGBERG, M. 1988. Marantaceae. Pp. 1191 in Harling, G. & Andersson, L. (ed.). Flora of Ecuador. Volume 32 – Part 224. Botanical Institute, University of Gothenburg.
LUIZÃO, F. J. & SCHUBART, H. O. R. 1987. Litter production and decomposition in a terra-firme forest of Central Amazonia. Experientia 43:259265.
LUIZÃO, R. C. C., LUIZÃO, F. J., PAIVA, R. Q., MONTEIRO, T. F., SOUZA, L. S. & KRUIJTS, B. 2004. Variation of carbon and nitrogen cycling processes along a topographic gradient in a central Amazonia forest. Global Change Biology 10:92600.
MAGNUSSON, W. E., LIMA, A. P., LUIZÃO, R. C. C., LUIZÃO, F., COSTA, F. R. C., CASTILHO, C. V. & KINUPP, V. F. 2005. RAPELD: a modification of the Gentry method for biodiversity surveys in long-term ecological research sites. Biota Neotropica 5 (2). http://www.biotaneotropica.org.br/v5n2/pt/abstract?point-of-view+bn01005022005.
MARIMON-JÚNIOR, B. H. & HAY, J. D. 2008. A new instrument for measurement and collection of quantitative samples of the litter layer in forests. Forest Ecology and Management 255:22442250.
MARQUES-FILHO, A. O., RIBEIRO, M. N. G. & SANTOS, J. M. 1981. Estudos climatológicos da Reserva Florestal Ducke, Manaus, AM. IV – Precipitação. Acta Amazonica 4:759768.
METCALFE, D. J. & GRUBB, P. J. 1997. The responses to shade of seedlings of very small-seeded tree and shrub species from tropical rain forest in Singapore. Functional Ecology 11:215221.
METCALFE, D. J. & TURNER, I. M. 1998. Soil seed bank from lowland rain forest in Singapore: canopy-gap and litter-gap demanders. Journal of Tropical Ecology 14:103108.
PAGE, C. 2002. Ecological strategies in fern evolution: a neopteridological overview. Review of Palaeobotany and Palynology 119:133.
PAOLI, G. D., CURRAN, L. M. & ZAK, D. R. 2006. Soil nutrients and beta diversity in the Bornean Dipterocarpaceae: evidence for niche partitioning by tropical rain forest trees. Journal of Ecology 94:157170.
PÉREZ-GARCÍA, B., MENDOZA-RUIZ, A., SÁNCHEZ-CORONADO, M. E. & OROZCO-SEGOVIA, A. 2007. Effect of light and temperature on germination of spores of four tropical fern species. Acta Oecologica 32:171179.
POULSEN, A. D. 1996. Species richness and density of ground herbs within a plot of lowland rainforest in northwest Borneo. Journal of Tropical Ecology 12:177190.
QUESADA, C. A., LLOYD, J., ANDERSON, L. O., FYLLAS, N. M., SCHWARZ, M. & CZIMEZIK, C. I. 2011. Soils of Amazonian with particular reference to the RAINFOR sites. Biogeosciences 8:14151440.
RIBEIRO, J. E. L. S., HOPKINS, M. J. G., VICENTINI, A., SOTHERS, C. A., COSTA, M. A. S., BRITO, J. M., SOUZA, M. A. D., MARTINS, L. H. P., LOHMANN, L. G., ASSUNÇÃO, P. A. C., PEREIRA, E. C., SILVA, C. F., MESQUITA, M. R. & PROCóPIO, L. 1999. Flora da Reserva Ducke: Guia de identificação das plantas vasculares de uma floresta de terra firme na Amazônia central. INPA/DFID, Manaus. 816 pp.
SAYER, E. J. 2006. Using experimental manipulation to assess the roles of leaf litter in the functioning of forest ecosystems. Biological Reviews 81:131.
SCHIMPF, D. J. & DANZ, N. P. 1999. Light passage through leaf litter: variation among northern hardwood trees. Agricultural and Forest Meteorology 97:103111.
SIMPSON, D. A. 2006. Flora da Reserva Ducke, Amazonas, Brasil: Cyperaceae. Rodriguésia 57:171188.
SYDES, C. L. & GRIME, J. P. 1981. Effects of tree leaf litter on herbaceous vegetation in the deciduous woodlands. I. Field investigations. Journal of Ecology 69:237248.
TAKYU, M., AIBA, S. I. & KITAYAMA, K. 2003. Changes in biomass, productivity and decomposition along topographical gradients under different geological conditions in tropical lower montane forests on Mount Kinabalu, Borneo. Oecologia 134:397404.
TÓTA, J. 2009. Estudo da advecção horizontal de CO2 em florestas na Amazônia e sua influência no balanço de Carbono. Ph.D. thesis, INPA/UEA, Manaus.
TUOMISTO, H. & POULSEN, A. D. 1996. Influence of edaphic specialization on pteridophyte distribution in Neotropical rain forests. Journal of Biogeography 23:283293.
TUOMISTO, H., RUOKOLAINEN, K., AGUILAR, M. & SARMIENTO, A. 2003. Floristic patterns along a 43-km long transect in an Amazonian rain forest. Journal of Ecology 91:743756.
VÁZQUEZ-YANES, C., OROZCO-SEGOVIA, A., RINCÓN, E., SANCHEZ-CORONADO, M. E., HUANTE, P., TOLEDO, J. R. & BARRADAS, V. L. 1990. Light beneath the litter in a tropical forest: effect on seed germination. Ecology 71:19521958.
WADA, M. 2007. The fern as a model system to study photomorphogenesis. Journal of Plant Research 120:316.
WRIGHT, S. J. 2002. Plant diversity in tropical forests: a review of mechanisms of species coexistence. Oecologia 130:114.
XIONG, S. & NILSSON, C. 1999. The effects of plant litter on vegetation: a meta-analysis. Journal of Ecology 87:984994.
ZUQUIM, G., COSTA, F. R. C., PRADO, J. & BRAGA-NETO, R. 2009. Distribution of pteridophyte communities along environmental gradients in central Amazonia, Brazil. Biodiversity and Conservation 18:151166.
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