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Complex edge effects on soil moisture and microclimate in central Amazonian forest

Published online by Cambridge University Press:  10 July 2009

J. L. C. Camargo  and
V. Kapos
J. L. C. Camargo
Affiliation:
Department of Plant Sciences, University of Cambridge, Cambridge CB2 3EA, UK. Biological Dynamics of Forest Fragments Project, INPA-Ecologia, CP. 478, Manaus 69011 AM, Brazil.
V. Kapos
Affiliation:
Department of Plant Sciences, University of Cambridge, Cambridge CB2 3EA, UK.
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Abstract

We investigated the influence of a four-year-old forest edge near Manaus, Brazil, on soil moisture and vertical profiles of air vapour pressure deficit (VPD) within the forest. Soil moisture was measured (with a neutron probe) 0, 5, 10, 20, 40, 60, 80, 100, 150 and 200 m into the forest from the edge, in undisturbed control areas, and in the pasture. Control soil moisture was better explained by rainfall in the previous 2 or 10 days than by longer-term totals. Soil water potentials ≤ – 1.5 MPa occurred at some forest locations during the driest period. The variation in soil moisture with distance from the forest edge was complex, with higher values just inside the edge and depleted zones at the edge and 40–80 m inside it. At a given height, VPD (standardized relative to measurements in the open) was not related to distance from the edge, but VPD increased more with height near the edge than in control areas. The complexity of the edge's influence and the contrast with earlier data from the same edge can be explained by the changing vegetation structure near the edge. Regrowth ‘seals’ the edge with more leaves that transpire and deplete soil moisture, while protecting the understorey just inside the edge from desiccating conditions. A mosaic of gaps of differing ages develops behind the edge, increasing the variation in microclimatic conditions near the ground and consequently in evapotranspiration and soil moisture.

Keywords

edge effectsforest fragmentmicroclimateneutron probesoil moisturetropical forestvegetation structureVPD
Type
Research Article
Information
Journal of Tropical Ecology , Volume 11 , Issue 2 , May 1995 , pp. 205 - 221
Copyright
Copyright © Cambridge University Press 1995

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References

LITERATURE CITED

Anonymous. 1978. Projeto RADAM BRASIL Folha SA 20 Manaus. Ministério da Minas e Energia: Departamento Nacional de Produçāo Mineral, Rio de Janeiro.Google Scholar
Bazzaz, F. A. 1991. Regeneration of tropical forest: physiological responses of pioneer and secondary species. Pp. 91–114 in Gomez-Pompa, A., Whitmore, T. C. & Hadley, M. (eds). Rain forest regeneration and management. Parthenon Publishing, New Jersey.Google Scholar
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 4:173–184.CrossRefGoogle Scholar
Bierregaard, R. O. Jr, Lovejoy, T. E., Kapos, V., dos Santos, A. A. & Hutchings, R. W. 1992. The biological dynamics of tropical rainforest fragments; a prospective comparison of fragments and continuous forest. Bioscience 42:859–566.CrossRefGoogle Scholar
Cabral, O. M. R. 1991. Armazenagem da Água num Solo com Floresla de Terra firme e com Seringal Implantado. MSc Dissertation, Instituto Nacional de Pesquisas Espaciais, Sāo José dos Campos, Brazil.Google Scholar
Camargo, J. L. C. 1993. Variation in soil moisture and air vapour pressure deficit relative to tropical rain forest edges near Manaus, Brazil. MPhil. Dissertation, University of Cambridge, Cambridge, UK.Google Scholar
Cavalier, J. 1989. Effects of fertilizers on fine root production in two tropical rainforests. PhD Dissertation, University of Cambridge, Cambridge, UK.Google Scholar
Chauvel, A., Grimaldi, M. & Tessier, D. 1991. Changes in soil pore-space distribution following deforestation and revegetation: an example from the Central Amazon Basin, Brazil. Forest Ecology and Management 38:259–271.CrossRefGoogle Scholar
Fetcher, N., Oberbauer, S. F. & Strain, B. R. 1985. Vegetation effects on microclimate in lowland tropical forest in Costa Rica. International Journal of Biometeorology 29:145–155.CrossRefGoogle Scholar
Genstat, . 1987. Genstat 5: Reference Manual. The Genstat 5 Committee of the Statistics Department, R.E.S. Clarendon Press, Oxford.Google Scholar
Hubbell, S. P. & Foster, R. B. 1986. Canopy gaps and the dynamics of a neotropical forest. Pp. 77–96 in Crawley, M. J. (ed.). Plant ecology. Blackwell Scientific Publications, Oxford.Google Scholar
Kapos, V. 1989. Effects of isolation on the water status of forest patches in the Brazilian Amazon. Journal of Tropical Ecology 5:173–185.CrossRefGoogle Scholar
Kapos, V., Ganade, G. M., Matsui, E. & Victoria, R. L. 1993. δ13C as an indicator of edge effects in tropical rain forest reserves. Journal of Ecology 81:425–432.CrossRefGoogle Scholar
Landon, J. R. 1984. Booker tropical soil manual. Booker Agriculture International Ltd, London.Google Scholar
Leopoldo, P. R., Franken, W. & Matsui, E. 1985. Hydrological aspects of the tropical rainforest in the central Amazon. In Hemming, J. (ed.). Change in the Amazon basin. Manchester University Press, Manchester.Google Scholar
Leopoldo, P. R., Matsui, E., Salati, E., Franken, W. & Ribeiro, M. N. G. 1982. Composiçāo isotópica da água de chuva e da água do solo em floresta Amazônica do tipo terra firme, regiāo de Manaus. Acta Amazonica (suppl.) 12:7–13.CrossRefGoogle Scholar
Lovejoy, T. E., Bierregaard, R. O. Jr, Rylands, A. B., Malcolm, J. R., Quintela, C. E., Harper, L. H., Brown, K. S. Jr, Schubart, H. O. R. & Hays, M. B. 1986. Edge and other effects of isolation on Amazon forest fragments. Pp. 257–285 in Soule, M. E. (ed.). Conservation biology: the science of scarcity and diversity. Sinauer Associates, Sunderland, Massachusetts.Google Scholar
Lovejoy, T. E. & Oren, D. C. 1981. Minimum critical size of ecosystems. Pp. 7–12 in Burgess, R. L. & Sharpe, D. M. (eds). Forest island dynamics in Man-dominated landscapes. Springer-Verlag, New York.CrossRefGoogle Scholar
Lovejoy, T. E., Rankin, J. M., Bierregaard, R. O. Jr, Brown, K. S. Jr, Emmons, L. H. & Van Der Voort, M. E. 1984. Ecosystem decay of Amazon forest remnants. Pp. 295–325 in Nitecki, M. H. (ed.). Extinctions. University of Chicago Press, Chicago.Google Scholar
Moore, M. R. & Vankat, J. L. 1986. Responses of the herb layer to the gap dynamics of a mature beech-maple forest. American Naturalist 115:336–347.CrossRefGoogle Scholar
Nortcliff, S. & Thornes, J. B. 1981. Seasonal variations in the hydrology of a small forested catchment near Manaus, Amazonas, and the implications for its management. Pp. 37–57 in Lai, R. & Russel, E. W. (eds). Tropical agricultural hydrology. John Wiley & Sons, New York.Google Scholar
Palik, B. J. & Murphy, P. G. 1990. Disturbance versus edge effects in sugar-maple/beech forest fragments. Forest Ecology and Management 32:187–202.CrossRefGoogle Scholar
Parker, G. G. 1985. The effect of disturbance on water and solute budgets of hillslope tropical rainforest in northeastern Costa Rica. PhD Dissertation, University of Georgia, Athens, Georgia, USA.Google Scholar
Ranney, J. W. 1977. Forest islands edges: their structure, development, and importance to regional forest ecosystem dynamics. EDFB/IBP-77/1. Oak Ridge National Laboratory, Oak Ridge, Tennessee.CrossRefGoogle Scholar
Ranney, J. W., Bruner, M. C. & Levenson, J. B. 1981. The importance of edge in the structure and dynamics of forest islands. Pp. 67–95 in Burgess, R. L. & Sharpe, D. M. (eds). Forest island dynamics in Man-dominated landscapes. Springer-Verlag, New York.CrossRefGoogle Scholar
Roberts, J., Cabral, O. M. R. & De Aguiar, L. F. 1990. Stomatal and boundary-layer conductances in an Amazonian terra firme rain forest. Journal of Applied Ecology 27:336–353.CrossRefGoogle Scholar
Salati, E. 1985. The climatology and hydrology of Amazonia. Pp. 18–48 in Prance, G. T. & Lovejoy, T. E. (eds). Key environments: Amazonia. Pergamon Press, Oxford.Google Scholar
Salati, E. & Vose, P. B. 1984. Amazon Basin: a system in equilibrium. Science 225:129–138.CrossRefGoogle Scholar
Santos, H. M. 1968. Conselho Nacional de Pesquisas: Instituto Nacional de Pesquisas da Amazonia, Manaus.Google Scholar
Shukla, J., Nobre, C. & Sellers, P. 1990. Amazon deforestation and climate change. Science 247:1322–1325.CrossRefGoogle ScholarPubMed
Shuttleworth, W. J. 1988. Evaporation from Amazonian rainforest. Proceedings of the Royal Society of London B 233:321–346.Google Scholar
Skole, D. & Tucker, C. 1993. Tropical deforestation and habitat fragmentation in the Amazon: satellite data from 1978 to 1988. Science 260:1905–1910.CrossRefGoogle ScholarPubMed
Sprugel, D. G. 1976. Dynamic structure of wave-regenerated Abies balsamea forests in the north-eastern United States, Journal of Ecology 64:889–911.CrossRefGoogle Scholar
USDA. 1975. Soil taxonomy: a basic system of soil classification for making and interpreting soil surveys. John Wiley & Sons, New York.Google Scholar
Vitousek, P. M. & Denslow, J. S. 1986. Nitrogen and phosphorus availability in treefall gaps of a lowland tropical rainforest. Journal of Ecology 74:1167–1178.CrossRefGoogle Scholar
Williams-Linera, G. 1990. Vegetation structure, and environmental conditions of forest edges in Panama. Journal of Ecology 78:356–373.CrossRefGoogle Scholar