Advertisement

Amphibian diversity and nestedness in a dynamic floodplain river (Tagliamento, NE-Italy)

  • I. Klaus
  • J. V. Ward
  • K. Tockner
  • C. Baumgartner
Chapter
  • 864 Downloads
Part of the Developments in Hydrobiology book series (DIHY, volume 187)

Abstract

Amphibian distribution and assemblage structure were investigated along the last morphologically intact river corridor in Central Europe (Tagliamento). Thirteen taxa were identified with Rana latastei and Bufo bufo being the predominant species. In the main study reach, a 2 km2 dynamic island-braided floodplain in the middle section of the river, 130 water bodies were delineated that were situated either in the active floodplain (82 sites) or in the adjacent riparian forest (48 sites). Results demonstrated that the active floodplain increased appreciably the available habitat for amphibians, despite frequent disturbances by floods or droughts. Amphibian richness within a given habitat was significantly correlated with distance from vegetated islands, fish density, and water temperature. In the active floodplain, species distribution was highly predictable, exhibiting nearly perfect nestedness, suggesting that selective colonisation and extinction processes predominated. The degree of nestedness was much higher than in the adjacent riparian forest or in regulated floodplains in Central Europe. Results clearly emphasise that amphibians can exploit the entire hydrodynamic gradient, except the main channel. In the active floodplain, vegetated islands and large woody debris are important, directly and indirectly, in maintaining both habitat and amphibian diversity and density in this gravel-bed river.

Key words

braided river Bufo bufo conservation disturbance indicator species island large wood population parafluvial pond Rana latastei restoration 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Abbe, T. B. & D. R. Montgomery, 1996. Large woody debris jams, channel hydraulics and habitat formation in large rivers. Regulated Rivers: Research & Management 12: 201–221.CrossRefGoogle Scholar
  2. Alford, R. A. & S. J. Richards, 1999. Global amphibian declines: a problem in applied ecology. Annual Revue of Ecology and Systematics 30: 133–165.CrossRefGoogle Scholar
  3. Arscott, D. B., K. Tockner & J. V. Ward, 2000. Aquatic habitat diversity along the corridor of an Alpine floodplain river (Fiume Tagliamento, Italy). Archiv fü r Hydrobiologie 149: 679–704.Google Scholar
  4. Arscott, D. B., K. Tockner & J. V. Ward, 2002. Geomorphic dynamics along a braided-river corridor in the Alps (Fiume Tagliamento, NE Italy). Ecosystems 5: 802–814.Google Scholar
  5. Arscott, D. B., K. Tockner & Die Amphibien Europas. Franck-Kosmos, Stuttgart.Google Scholar
  6. Oertli, B., D. Auderset Joyse, E. Castella, R. Juge, D. Cambin, D. & J.-B. Lachavanne, 2002. Does size matter? The relationship between pond area and biodiversity. Biological Conservation 104: 59–70.CrossRefGoogle Scholar
  7. Patterson, B. D. & J. H. Brown, 1991. Regionally nested patterns of species composition in granivorous rodent assemblages. Journal of Biogeography 18: 395–402.CrossRefGoogle Scholar
  8. Patterson, B. D. & W. Atmar, 2000. Analyzing species composition in fragments. Zoological Monographs 46: 9–24.Google Scholar
  9. Petts, G. E., H. Moller & A. L. Roux, 1989. Historical Changes of Large Alluvial Rivers, Western Europe. John Wiley & Sons, Chichester, UK.Google Scholar
  10. Pintar, M., C. Baumgartner & A. Waringer-Lö schenkohl, 1997. Verbreitung des Springfrosches in Augebieten der niederö sterreichischen Donau. Rana 2: 153–158.Google Scholar
  11. Skelly, D. K., 1997. Tadpole communities. Pond permanence and predation are powerful forces shaping the structure of tadpole communities. American Scientist 85: 36–45.Google Scholar
  12. Snodgrass, J. W., M. J. Komorosky, A. L. Bryan Jr. & J. Burger, 2000. Relationships among isolated wetland size, hydroperiod, and amphibian species richness: implications for wetland regulations. Conservation Biology 14: 414–419.CrossRefGoogle Scholar
  13. Stanford, J. A., J. V. Ward, W. J. Liss, C. A. Frissell, R. N. Williams, J. A. Lichatowitch & C. C. Coutant, 1996. A general protocol for restoration of regulated rivers. Regulated Rivers: Research & Management 12: 391–413.CrossRefGoogle Scholar
  14. Stuart, S. N., J. S. Chanson, N. A. Cox, B. E. Young, A. L. Rodrigues, D. L. Fischman & R. W. Waller, 2004. Status and trends of amphibian declines and extinctions worldwide. Science 306: 1783–1786.PubMedCrossRefGoogle Scholar
  15. Tockner, K. & J. V. Ward, 1999. Biodiversity along riparian corridors. Archiv fü r Hydrobiologie, Supplement 115: 293–310.Google Scholar
  16. Tockner, K., F. Schiemer, C. Baumgartner, G. Kum, E. Weigand, I. Zweimü ller & J. V. Ward, 1999. The Danube restoration project: species diversity patterns across connectivity gradients in the floodplain system. Regulated Rivers: Research & Management 15: 245–258.CrossRefGoogle Scholar
  17. Tockner, K. & J. A. Stanford, 2002. Riverine floodplains: present state and future trends. Environmental Conservation 29: 308–330.CrossRefGoogle Scholar
  18. Tockner, K., J. V. Ward, D. B. Arscott, P. J. Edwards, J. Kollmann, A. M. Gurnell, G. E. Petts & B. Maiolini, 2003. The Tagliamento River: a model ecosystem of European importance. Aquatic Sciences 65: 239–253.CrossRefGoogle Scholar
  19. Tockner, K., S. E. Bunn, G. Quinn, R. J. Naimann, J. A. Stanford & C. Gordon, 2006. Floodplains: critically threatened ecosystems In Polunin, N. C. (ed.), The State of the World’s Waters. Cambridge University Press, Cambridge. In press.Google Scholar
  20. Van der Nat, D., K. Tockner, P. J. Edwards, J. V. Ward & A. M. Gurnell, 2003. Habitat change in braided rivers (Tagliamento, NE-Italy). Freshwater Biology 48: 1799–1812.CrossRefGoogle Scholar
  21. Ward, J. V., K. Tockner & F. Schiemer, 1999a. Biodiversity of floodplain river systems: ecotones and connectivity. Regulated Rivers: Research & Management 15: 125–139.CrossRefGoogle Scholar
  22. Ward, J. V., K. Tockner, P. J. Edwards, J. Kollmann, G. Bretschko, A. M. Gurnell, G. E. Petts & B. Rossaro, 1999b. A reference river system for the Alps: The „Fiume Tagliamento“. Regulated Rivers: Research & Management 15: 63–75.CrossRefGoogle Scholar
  23. Ward, J. V. & K. Tockner, 2001. Biodiversity: towards a unifying theme for river ecology. Freshwater Biology 46: 807–819.CrossRefGoogle Scholar
  24. Waringer-Lö schenkohl, A. & J. Waringer, 1990. Zur Typisierung von Augewä ssern anhand der Litoralfauna (Evertebraten, Amphibien). Archiv fü r Hydrobiologie, Supplement 84: 73–94.Google Scholar
  25. Wellborn, G. A., D. K. Skelly & E. E. Werner, 1996. Mechanisms creating community structure across a freshwater habitat gradient. Annual Revue of Ecology and Systematics 27: 337–363.CrossRefGoogle Scholar
  26. Werner, E. E. & M. A. McPeek, 1994. Direct and indirect effects of predators on two anuran species along an environmental gradient. Ecology 75: 1368–1382.CrossRefGoogle Scholar

Copyright information

© Springer2006 2006

Authors and Affiliations

  • I. Klaus
    • 1
  • J. V. Ward
    • 1
  • K. Tockner
    • 1
    • 2
  • C. Baumgartner
    • 3
  1. 1.Department of LimnologyEAWAG/ETHDübendorfSwitzerland
  2. 2.Institute of Ecosystem Studies (IES)MillbrookUSA
  3. 3.Alluvial Zone National ParkOrth/DonauAustria

Personalised recommendations