Measures of central tendency of aquatic habitat parameters : application to river macrophyte communities

• Autorzy: Szoszkiewicz K. , Kayzer D. , Staniszewski R. , Dawson H.
• Konferencja: All-Poland Scientific Conference "Interspecies Relationships at Levels of Organization" (2009 ; Krasnobród)
• Języki publikacji: EN

Abstrakty

EN

The aim of this paper is to assess usefulness of different measures when determining central tendencies which characterise the environmental requirements of living organisms. Mathematical analyses were made of the environmental parameters of river macrophyte communities which were taken as a representative pattern of different levels of biological structures. To deliver a representative dataset, botanical surveys were carried out on a range of British rivers together with environmental assessment and the plant communities groups were identified based on characteristic species according to eslished phytosociological criteria. The mean values and standard univariate medians of the revealed associations were compared with means calculated on the basis of advanced transformation and also with the rarely calculated multivariate L median. Due to high variance and asymmetrical distribution, the analyses based on the mean-value appeared to be limited in application. To avoid this disadvantage transformation to obtain normality of the dataset standardisation was proposed although even this did not fully reach a satisfactory symmetry. It was concluded that each environmental variable for each single biota must be individually treated by a suile transformation to obtain approximately normal distributions. The univariate median was very resistant to the effects of outliers but gave a flattened output of the environmental dataset making the partitioning of biological units very difficult. The multivariate L median appeared to be unaffected by outliers. It enabled to obtain considerable ordering of communities against individual environmental parameters without data transformation.

Słowa kluczowe

EN

aquatic vegetation; central tendency; L median; phytosociology; plant associations

PL

fitosocjologia; roślinność wodna; tendencje centralne; zespoły roślinne

• Wydawca: Museum and Institute of Zoology, Polish Academy of Sciences
• Czasopismo: Polish Journal of Ecology
• Rocznik: 2010
• Tom: Vol. 58, nr 4
• Strony: 693--706
• Opis fizyczny: Bibliogr. 40 poz.,Il., tab.,

Twórcy

autor

Szoszkiewicz K.

autor

Kayzer D.

autor

Staniszewski R.

autor

Dawson H.

• Poznań University of Life Sciences, Department of Ecology and Environmental Protection, Piatkowska 94C, 60-649 Poznań, Poland,

Bibliografia

• 1. Abramowitz M. 1993 – Elementary Analytical Methods (In: Handbook of mathematical functions with formulasgGraphs, and mathematical tables, Eds: M. Abramowitz, I.A. Stegun) – New York, Dover, pp. 9–64.
• 2. Bornette G., Amoros C., Piegay H., Tachet J., Hein T. 1998 – Ecological complexity of wetlands within a river landscape – Biol. Conserv. 85: 35–45.
• 3. Braun-Blanquet J. 1928 – Pflanzensoziologie. Gründzuge der Vegetationskunde – SpringerVerlag, Berlin, 330 pp.
• 4. Braun-Blanquet J. 1964 – Pflanzensoziologie. Grundzüge der Vegetationskunde – Springer, Wien, New York, 865 pp.
• 5. Cao Y., Willians D.D., Williams N.E. 1999 – Data transformation and standarisation in the multivariate analysis of river water quality – Ecol. Appl. 9: 669–677
• 6. Cann A.J. 2002 – Maths from Scratch for Biologists – John Wiley & Sons, Chichester, 240 pp.
• 7. Dawson F.H., Hornby D.D., Hilton J. 2002 – A method for the automated extraction of environmental variables to help the classification of rivers in Britain – Aquatic Conserv: Mar. Freshw. Ecosyst. 12: 391–403.
• 8. Dawson F.H., Kayzer D., Molinski K., Szoszkiewicz K. 1999 – A comparison of the analytical clustering techniques for aquatic plant populations – Biometrical Letters, 36: 76–77.
• 9. Dawson F.H., Szoszkiewicz K. 1999 – Relationship of some ecological factors with the associations of vegetation in British rivers – Hydrobiologia, 415: 117–122.
• 10. Dierschke H. 1994 – Pflanzensoziologie – Grundlagen und Methoden – Eugen Ulmer Verlag, Stuttgart, 683 pp.
• 11. Ellenberg H., Weber H.E., Düll R., Wirth V., Werner W., Paulissen D. 1992 – Zeigerwerte von Pflanzen in Mitteleuropa – Scripta Geobotanica, 18, 258 pp.
• 12. Elzinga C.L., Salzer D.W., Willoughby J.W., Gibbs J.P. 2001 – Monitoring plant and animal populations – Malden, MA: Blackwell Science, Inc. 360 pp.
• 13. European Environmental Agency 2002 – EUNIS Habitat classification. Version 2.3. (Internet publication: http://eunis.eea.europa.eu/habitats.jsp).
• 14. Gregory-Eaves I., Smol J.P., Finney B.P., Lean D.R.S., Edwards M.E. 2000 – Characteristics and variation in lakes along a north-south transect in Alaska – Archiv Hydrobiol. 147: 193–223.
• 15. Haldane J.B.S. 1948 – Note on the median of a multivariate distribution – Biometrika, 35: 414–415.
• 16. Haury J. 1996 – Assessing functional typology involving water quality, physical features and macrophytes in a Normandy river – Hydrobiologia, 340: 43–49.
• 17. Hill M.O. 1979 – TWINSPAN – a FORTRAN program for arranging multivariate data in an ordered two-way table by classification of the individuals and attributes – Ithaca, New York, Cornell University.
• 18. Holmes N.T.H., Newman J.R., Dawson F.H., Chadd S., Rouen K.J., Sharp L. 1999 – Mean trophic rank: a user’s manual – Environmental Agency R & D Technical Report E38, Bristol, 133 pp.
• 19. Jeffers J.N.R. 1998 – Characterisation of river habitats and prediction of habitat features using ordination techniques – Aquatic Conserv: Mar. Freshw. Ecosyst. 8: 529–540.
• 20. Jongman R.H.G., ter Braak C.J.F., van Tongeren O.F.R. 1995 – Data analysis in community and landscape ecology – Cambridge University Press, 299 pp.
• 21. Kent M., Coker P. 1992 – Vegetation Description and Analysis – Belhaven Press, London, 363 pp.
• 22. Kvalseth T.O. 1985 – Cautionary note about r squared – Amer. Stat. 39: 279–285.
• 23. Lira J. 1999 – Zastosowanie wybranych metod statystycznych opartych na medianie w doświadczalnictwie rolniczym [Application of selected statistical methods based on agricultural experiments] – Ph.D. thesis, Agricultural University, Poznań, 119 pp. (in Polish).
• 24. Marstaller R. 1993 – Synsystematische Übersicht üdie Moosgesellschaften Zentraleuropas – Herzogia, 9: 513–541.
• 25. Matuszkiewicz W. 2001 – Przewodnik do oznaczania zbiorowisk roślinnych Polski [Guide to identification of the vegetation communities in Poland] – PWN, Warszawa, 537 pp. (in Polish).
• 26. Rieley J.O., Page S. 1990 – Ecology of Plant communities – Burnt Mill, Longman Scientific & Technical. 163 pp.
• 27. Riis T., Sand–Jensen K., Vestergaard O. 2000 – Plant communities in lowland Danish streams: species composition and environmental factors – Aquat. Bot. 66: 255–272.
• 28. Robach F., Thiébaut G., Trémolières M. Muller S. 1996 – A reference system for continental running waters: plant communities as bioindicators of increasing eutrophication in alkaline and acidic waters in north–east France – Hydrobiologia, 340: 67–76.
• 29. Rodwell J.S. 1998 – Phytosociological Conspectus of British Plant Communities – Lancaster National Vegetation Classification, Lancaster University, 35 pp.
• 30. Rodwell J.S., Pigott C.D., Ratcliffe D.A., Malloch A.J.C., Birks H.J.B., Proctor M.C.F., Shimwell D.W., Huntley J.P., Radford E., Wiggington M.J., Wilkins P. 1992 – British Plant Communities, vol. 3, Grasslands and montane communities – Cambridge University Press, Cambridge, 540 pp.
• 31. Rodwell J. S., Pigott C.D., Ratcliffe D.A., Malloch A.J.C., Birks H.J.B., Proctor M.C.F., Shimwell D.W., Huntley J.P., Radford E., Wiggington M.J., Wilkins P. 1995 – British Plant Communities, vol. 4, Aquatic communities, swamps and tall herb fens – Cambridge University Press, Cambridge, 283 pp.
• 32. Satake K. Nishikawa M., Shibata K. 1989 – Distribution of aquatic bryophytes in relation to water chemistry of the acid river Akagawa, Japan – Archiv Hydrobiol. 116: 299–311.
• 33. Schnitzler A., Eglin I., Robach F., Trémoličres M. 1996 – Response of aquatic macrophyte communities to levels P and N nutriments in an old swamp of the upper Rhine plain (Eastern France) – Ecologie, 27: 51–61.
• 34. Shapiro S.S., Wilk M.B., Chen H.J. 1968 - A comparative study of various tests of normality – JASA, 63: 1343–1372.
• 35. Small C.G. 1990 – A survey of multidimensional medians – Internat. Statist. Rev. 58: 263–277.
• 36. Spink A.J., Murphy K.J., Westlake D.F. 1997 – Distribution of environmental regulation of species of Ranunculus subgenus Batrachium in British rivers – Archiv Hydrobiol. 139: 509–525.
• 37. Szoszkiewicz K. 2004 – Vegetation as an indicator of trophic status of running waters based on rivers of Great Britain and Northern Ireland – Rozprawy Naukowe AR Poznań, pp. 349 (in Polish).
• 38. van der Maarel E. 1979 – Multivariate methods in phytosociology, with special reference to the Netherlands (In: The study of vegetation, Ed: M.J.A. Werger) – Junk, the Hague, pp. 161–226.
• 39. Vanderpoorten A., Klein J.–P., Stieperaere H., Trémolières M. 1999 – Variation of aquatic bryophyte assemblages in the Rhine Riftrelated to water quality. 2. The Alsatian Rhine floodplain – J. Bryol. 21: 17–23.
• 40. Weber A. 1909 – Űber den Standort der Industrien. Teil I: Reine Theorie des Standorts J.C.B. Mohr, Tübingen: 16–57.