, Volume 565, Issue 1, pp 121–133 | Cite as

Amphibian Diversity and Nestedness in a Dynamic Floodplain River (Tagliamento, NE-Italy)

  • K. Tockner
  • I. Klaus
  • C. Baumgartner
  • J. V. Ward


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.


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


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  1. Abbe, T. B., Montgomery, D. R. 1996Large woody debris jams, channel hydraulics and habitat formation in large riversRegulated Rivers: Research & Management12201221CrossRefGoogle Scholar
  2. Alford, R. A., Richards, S. J. 1999Global amphibian declines: a problem in applied ecologyAnnual Revue of Ecology and Systematics30133165CrossRefGoogle Scholar
  3. Arscott, D. B., Tockner, K., Ward, J. V. 2000Aquatic habitat diversity along the corridor of an Alpine floodplain river (Fiume Tagliamento, Italy)Archiv für Hydrobiologie149679704Google Scholar
  4. Arscott, D. B., Tockner, K., Ward, J. V. 2002Geomorphic dynamics along a braided-river corridor in the Alps (Fiume Tagliamento, NE Italy)Ecosystems5802814Google Scholar
  5. Arscott, D. B., Tockner, K., Ward, J. V. 2005Lateral organization of aquatic invertebrates along the corridor of a braided floodplain riverJournal of the North American Benthological Society24934954CrossRefGoogle Scholar
  6. Atmar, W., Patterson, B. D. 1993The measure of order and disorder in the distribution of species in fragmented habitatsOecologia96373382CrossRefGoogle Scholar
  7. Atmar, W. & B. D. Patterson, 1995. The Nestedness Temperature Calculator, a Visual BASIC Program Including 294 Presence–Absence Matrices. AICS Research Inc. University Park, New Mexico, and the Filed Museum, ChicagoGoogle Scholar
  8. Baumgartner, C., Waringer-Löschenkohl, A., Pintar, M. 1997Bedeutung der Konnektivität für die Springfroschpopulationen der DonauauenRana, Sonderheft2159162Google Scholar
  9. Beebee, T. J. C. 1996Ecology and Conservation of AmphibiansChapman & HallLondonGoogle Scholar
  10. Nooij, R. J. W., Verberk, W. C. E. P., Lenders, H. J. R., Leuven , R. S. E. W., Nienhuis, P. H. 2006The importance of hydrodynamics for protected and endangered biodiversity of lowland riversHydrobiologia565153162CrossRefGoogle Scholar
  11. Günther, R., Plöttner, J. 1994Morphometric, enzymological and bioacoustic studies in Italian water frogs (Amphibia, Ranidae)Zoologica Poloniae39387415Google Scholar
  12. Gurnell, A. M., Petts, G. E. 2002Island-dominated landscapes of large floodplain rivers, a European perspectiveFreshwater Biology47581600CrossRefGoogle Scholar
  13. Gurnell, A. M., Petts, G. E., Hannah, D. M., Smith, B. P. G., Edwards, P. J., Kollmann, J., Ward, J. V., Tockner, K. 2001Island formation along the gravel-bed Fiume Tagliamento, ItalyEarth Surface Processes and Landforms263162CrossRefGoogle Scholar
  14. Gurnell, A. M., Tockner, K., Petts, G. E., Edwards, P. J. 2005Large wood delivers biocomplexity along river corridorsFrontiers in Ecology and Environment3377382Google Scholar
  15. Healey, M., Thompson, D., Robertson, A. 1997Amphibian communities associated with billabong habitats on the Murrumbidgee floodplain, AustraliaAustralian Journal of Ecology22270278Google Scholar
  16. Hecnar, S. J., Mc’Closkey, R. T. 1997Patterns of nestedness and species association in a pond-dwelling amphibian faunaOikos80371381Google Scholar
  17. Hill, M. O., 1979. TWINSPAN – FORTRAN program for arranging multivariate data in an ordered two-way table by classification of individuals and attributes, Cornell University, IthacaGoogle Scholar
  18. Homes, V., Hering, D., Reich, M. 1999The distribution and macrofauna of ponds in stretches of an Alpine floodplain differently impacted by hydrological engineeringRegulated Rivers: Research & Management15405417CrossRefGoogle Scholar
  19. Houlahan, J. E., Findlay, C. S., Schmidt, B. R., Meyer, A. H., Kuzmin, L. 2000Quantitative evidence for global amphibian population declinesNature404752755PubMedCrossRefGoogle Scholar
  20. Hughes, F. M. R., Rood, S. B. 2001FloodplainsWarren, A.French, J. R. eds. Habitat conservation: managing the physical environment editorsJohn Wiley & SonsChichester105121Google Scholar
  21. Joly, P., Morand, A. 1994Theoretical habitat templets, species traits, and species richness: amphibians in the Upper Rhone River and its floodplainFreshwater Biology31455468Google Scholar
  22. Kadmon, R. 1995Nested species subsets and geographic isolation: a case studyEcology76458465CrossRefGoogle Scholar
  23. Karaus, U., Alder, L., Tockner, K. 2005“Concave islands”: diversity and dynamics of parafluvial ponds in a gravel-bed riverWetlands252637Google Scholar
  24. Kiesecker, J. M., Blaustein, A. R., Belden, L. K. 2001Complex causes of amphibian population declinesNature410681684PubMedCrossRefGoogle Scholar
  25. Kodric-Brown, A., Brown, J. H. 1993Highly structured fish communities in Australian desert springsEcology7418471855CrossRefGoogle Scholar
  26. Kuhn, J. 1993Fortpflanzungsbiologie der Erdkröte Bufo b. bufo (L.) in einer WildflussaueZeitschrift für Ökologie und Naturschutz2110Google Scholar
  27. Kuhn, J., H. Laufer & M. Pintar (eds), 2001. Amphibien in Auen. Zeitschrift für Feldherpetologie Special Issue 8: 1–264Google Scholar
  28. Lapini A., N. Dall’ Asta, S. Bressi, P. Dolce & P. Pellarini, 1999. Atlante corologico degli Anfibi e dei Rettili del Friuli-Venezia Giulia. Pubblicazione n. 43. Edizioni del Museo Friulano di Storia Naturale, UdineGoogle Scholar
  29. Leuven, R. S. E. W., Hartog, C., Christiaans, M. M. C., Heijligers, W. H. C. 1986Effects of water acidification on the distribution pattern and the reproductive success of amphibiansExperientia42495503CrossRefGoogle Scholar
  30. Malmqvist, B., Hoffsten, P.-O. 2000Macroinvertebrate taxonomic richness, community structure and nestedness in Swedish streamsArchiv für Hydrobiologie1502954Google Scholar
  31. Marsh, D. M., Trenham, P. C. 2001Metapopulation dynamics and amphibian conservationConservation Biology154049CrossRefGoogle Scholar
  32. Merovich, C. E., Howard, J. H. 2000Amphibian use of constructed ponds on Maryland’s eastern shoreThe Journal of the Iowa Academy of Science107151159Google Scholar
  33. Morand, A., Joly, P. 1995Habitat variability and space utilization by the amphibian communities of the Upper-Rhone floodplainHydrobiologia300/301249257CrossRefGoogle Scholar
  34. Müller, N. 1995River dynamics and floodplain vegetation and their alterations due to human impactArchiv für Hydrobiologie Supplement101477512Google Scholar
  35. Nilsson, C., Reidy, C. A., Dynesius, M., Revenga, C. 2005Fragmentation and flow regulation of the world’s large river systemsScience308405408PubMedCrossRefGoogle Scholar
  36. Nöllert, A., Nöllert, C. 1992Die Amphibien EuropasFranck-KosmosStuttgartGoogle Scholar
  37. Oertli, B., Auderset Joyse, D., Castella, E., Juge, R., Cambin, D., D., , Lachavanne, J.-B. 2002Does size matter? The relationship between pond area and biodiversityBiological Conservation1045970CrossRefGoogle Scholar
  38. Patterson, B. D., Brown, J. H. 1991Regionally nested patterns of species composition in granivorous rodent assemblagesJournal of Biogeography18395402Google Scholar
  39. Patterson, B. D., Atmar, W. 2000Analyzing species composition in fragmentsZoological Monographs46924Google Scholar
  40. Petts, G. E., Moller, H., Roux, A. L. 1989Historical Changes of Large Alluvial Rivers, Western EuropeJohn Wiley & SonsChichester, UKGoogle Scholar
  41. Pintar, M., Baumgartner, C., Waringer-Löschenkohl, A. 1997Verbreitung des Springfrosches in Augebieten der niederösterreichischen DonauRana2153158Google Scholar
  42. Skelly, D. K. 1997Tadpole communities. Pond permanence and predation are powerful forces shaping the structure of tadpole communitiesAmerican Scientist853645Google Scholar
  43. Snodgrass, J. W., Komorosky, M. J., Bryan, A. L.,Jr., Burger,  J. 2000Relationships among isolated wetland size, hydroperiod, and amphibian species richness: implications for wetland regulationsConservation Biology14414419CrossRefGoogle Scholar
  44. Stanford, J. A., Ward, J. V., Liss, W. J., Frissell, C. A., Williams,  R. N., Lichatowitch, J. A., Coutant, C. C. 1996A general protocol for restoration of regulated riversRegulated Rivers: Research & Management12391413CrossRefGoogle Scholar
  45. Stuart, S. N., Chanson, J. S., Cox, N. A., Young, B. E., Rodrigues,  A. L., Fischman, D. L., Waller, R. W. 2004Status and trends of amphibian declines and extinctions worldwideScience30617831786PubMedCrossRefGoogle Scholar
  46. Tockner, K., Ward, J. V. 1999Biodiversity along riparian corridorsArchiv für Hydrobiologie, Supplement115293310Google Scholar
  47. Tockner, K., Schiemer, F., Baumgartner, C., Kum, G., Weigand,  E., Zweimüller, I., Ward, J. V. 1999The Danube restoration project: species diversity patterns across connectivity gradients in the floodplain systemRegulated Rivers: Research & Management15245258CrossRefGoogle Scholar
  48. Tockner, K., Stanford, J. A. 2002Riverine floodplains: present state and future trendsEnvironmental Conservation29308330CrossRefGoogle Scholar
  49. Tockner, K., Ward, J. V., Arscott, D. B., Edwards, P. J., Kollmann,  J., Gurnell, A. M., Petts, G. E., Maiolini, B. 2003The Tagliamento River: a model ecosystem of European importanceAquatic Sciences65239253CrossRefGoogle Scholar
  50. 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 pressGoogle Scholar
  51. Nat, D., Tockner, K., Edwards, P. J., Ward, J. V., Gurnell, A. M. 2003Habitat change in braided rivers (Tagliamento, NE-Italy)Freshwater Biology4817991812CrossRefGoogle Scholar
  52. Ward, J. V., Tockner, K., Schiemer, F. 1999aBiodiversity of floodplain river systems: ecotones and connectivityRegulated Rivers: Research & Management15125139CrossRefGoogle Scholar
  53. Ward, J. V., Tockner, K., Edwards, P. J., Kollmann, J., Bretschko,  G., Gurnell, A. M., Petts, G. E., Rossaro, B. 1999bA reference river system for the Alps: The “Fiume Tagliamento”Regulated Rivers: Research & Management156375CrossRefGoogle Scholar
  54. Ward, J. V., Tockner, K. 2001Biodiversity: towards a unifying theme for river ecologyFreshwater Biology46807819CrossRefGoogle Scholar
  55. Waringer-Löschenkohl, A., Waringer, J. 1990Zur Typisierung von Augewässern anhand der Litoralfauna (Evertebraten, Amphibien)Archiv für Hydrobiologie, Supplement847394Google Scholar
  56. Wellborn, G. A., Skelly, D. K., Werner, E. E. 1996Mechanisms creating community structure across a freshwater habitat gradientAnnual Revue of Ecology and Systematics27337363CrossRefGoogle Scholar
  57. Werner, E. E., McPeek, M. A. 1994Direct and indirect effects of predators on two anuran species along an environmental gradientEcology7513681382CrossRefGoogle Scholar

Copyright information

© Springer 2006

Authors and Affiliations

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

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