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Biodiversity & Conservation

, Volume 9, Issue 1, pp 1–14 | Cite as

Effects of flooding duration on species richness, floristic composition and forest structure in river margin habitat in Amazonian blackwater floodplain forests: implications for future design of protected areas

  • Leandro Valle Ferreira
Article

Abstract

Rivers in central Amazonia experience annual water-level fluctuations of up to 14 m, flooding vast areas of adjacent forest for periods ranging from a few to 270 days per year. At different sites, variation in the duration and type of flooding results in a mosaic of habitats that includes lakes, grasslands, forests, and streams. To study the effects of flood duration on plant species richness and floristic composition, two river margin sites were surveyed on the rivers Jaú and Tarumã-Mirim. Both areas are seasonally flooded by blackwaters, and plots were made at different topographic levels (lower, middle and upper slopes). All woody plants with DBH > 5cm were inventoried in five 10 × 40 m plots in each of the three topographic levels, which varied in length of flood duration and mean water level. Plant species richness did not vary significantly between topographic levels, but species composition varied substantially. At both study sites, the species composition exhibited distinctive distribution patterns with respect to the three topographic levels and river site. Differences in the distribution of dominant species in both sites probably relate to the ability of species to withstand seasonal flooding, although other edaphic factors associated with the topographic levels may also be important, especially for less-dominant, locally rare, and habitat generalist species. Species composition overlap among topographic levels at the two sites was highly variable ranging from 15% to 43%. Knowledge about the complex pattern of species composition and distributions between and among topographic levels and river sites is important for the preservation of the diverse flora of the blackwater forests and for the creation of future conservation management plans and design of protected areas in this ecosystem that will maintain the biodiversity.

Amazonia blackwater Brazil conservation community ordination floodplain forests forest structure species richness species distributions 

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References

  1. Adis J (1984) Seasonal igapó forests of central Amazonian black-water rivers and their terrestrial arthropod fauna. In: Sioli H (ed) The Amazon. Limnology and Landscape Ecology of aMighty Tropical River and its Basin, pp 245–268. Dr. W. Junk Publishers, Dordrecht/Boston/LancasterGoogle Scholar
  2. Amaral IL, Adis J and Prance GT (1997) On the vegetation of a seasonal mixedwater inundation forest near Manaus, Brazilian Amazonia. Amazoniana 14(3/4): 335–347Google Scholar
  3. Ayres JMC (1993) As matas de várzea do Mamirauá. MCT-CNPq-Programa do trópico Úmido, Sociedade civil de Mamirauá, BrasilGoogle Scholar
  4. Campbell DG, Daly DC, Prance GT and Maciel UN (1986) Quantitative ecological inventory of terra firme and várzea tropical forest on the Rio Xingu. Brazilian Amazon Brittonia 38(4): 369–393Google Scholar
  5. Campbell DG, Stone JL and Rosas Jr A (1992) A comparison of the phytosociology and dynamics of three (várzea) forests of known ages, Rio Juruá, Western Brazilian Amazon. Journal of Linnean Society 108: 213–237Google Scholar
  6. Ducke A and Black GA (1950) Phytogeographical notes in the Brazilian Amazon. An. Acad. Brasil. Cienc. 25: 1–46Google Scholar
  7. Ferreira LV (1991) O efeito do periodo de inundação, na distribuição, fenologia e regeneração de plantas em uma floresta de igapó na Amazônia Central. Master's thesis, INPA, BrasilGoogle Scholar
  8. Ferreira LV (1997) Effects of the duration of flooding on species richness and floristic composition in three hectares in the JaÚ National Park in floodplain forests in central Amazonia. Biodiversity and Conservation 6(10): 1353–1363Google Scholar
  9. Ferreira LV, Almeida SS and Rosario CS (1997) As áreas de inundação de Caxiuanã. In: Lisboa PLB (ed) Caxiuanã, pp 195–211. Museu Paraense Emílio GoeldiGoogle Scholar
  10. Ferreira LV and Stohlgren TJ (1999) Effects of river level fluctuation on plant species richness, diversity and distribution in a floodplain forest in Central Amazonia. Oecologia 120(4): 582–587Google Scholar
  11. Fittkau EJ (1971) Ökologische Gliederung des Amazonasgebietes auf geochemischer Gründlage. Munster. Forsch. Geol. Paläontol. 20/21: 35–50Google Scholar
  12. Junk WJ (1989) Flood tolerance and tree distribution in central Amazonia. In: Holm-Nielsen LB, Nielsen IC and Balslev H (eds) Tropical Forest Botanical Dynamics. Speciation and Diversity, pp 47–64. Academic Press, LondonGoogle Scholar
  13. Junk WJ, Bayley PB and Sparks RE (1989) The 'flood pulse' concept in river-system. In: Dodge DP (ed) Proceedings of the International Large River Symposium, pp 110–127. Can. Spec. Publ. Fish. Aquat. Sci. 106Google Scholar
  14. Keel SH and Prance GT (1979) Studies of the vegetation of a black water igapó (Rio Negro-Brazil). Acta Amazonica 9: 645–655Google Scholar
  15. Kozlowski TT (1982) Water supply and tree growth. Part II. Flooding. Forest Abstracts 43(3): 145–161Google Scholar
  16. Kubitzki K (1989) The ecogeographical differentiation of Amazonian inundated forests. Pl. Syst. Evol. 162: 285–304Google Scholar
  17. Magurran AE (1988) Ecological Diversity and Its Measurement. Princeton University Press, Princeton, New JerseyGoogle Scholar
  18. Mccune BJ (1991) Multivariate analysis on the PC-ORD system. Holcomb Institute, Butler University, IndianapolisGoogle Scholar
  19. McCune BJ and Mefford MJ (1995) PC-ORD. Multivariate Analysis of Ecological data, Version 2.0. MjM Software Design, Gleneden Beach, OregonGoogle Scholar
  20. Piedade MTF (1985) Ecologia e biologia reprodutiva de Astrocaryum jauari Mart. (Palmae) como exemplo de população adaptada às áreas inundáveis do rio Negro (igapós). Master Thesis, INPA, BrasilGoogle Scholar
  21. Pires JM and Prance GT (1985) The vegetation types of the Brazilian Amazon. In: Prance GT and Lovejoy TE (eds) Amazonia Key Environment, Part II, pp 109–145. Pergamon Press, LondonGoogle Scholar
  22. Prance GT (1979) Notes on vegetation of Amazonia III. The terminology of Amazonian forest types subject to inundation. Brittonia 31: 26–38Google Scholar
  23. Revilla JDC (1981) Aspectos florísticos e fitossociológicos da floresta inundável (igapó). Praia Grande, Rio Negro, Amazonas, Brasil. Master Thesis, INPA, BrasilGoogle Scholar
  24. Rodrigues WA (1961) Estudo preliminar de mata de várzea alta de uma ilha do baixo Rio Negro de solo argiloso e umido. Publicação n°10. INPA, Manaus, BrasilGoogle Scholar
  25. Takeuchi M (1962) The structure of the Amazonian vegetation VI. Igapó. Jour. Fac. Sci. Tokyo. III 8(7): 297–304Google Scholar
  26. Worbes M, Klinge H, Revilla JD and Martius C (1992) On the dynamics, floristic subdivision and geographical distribution of várzea forest in Central Amazonia. Journal of Vegetation Science 3: 553–564Google Scholar

Copyright information

© Kluwer Academic Publishers 2000

Authors and Affiliations

  • Leandro Valle Ferreira
    • 1
  1. 1.Fundo Mundial para a Natureza (WWF)Brasília-DFBrazil -

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