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The possibility of application of Sørensen and Renkonen indexes in the study of winter avifauna in small plots of the urban green areas

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dc.contributor.author Brauze, Tomasz
dc.contributor.author Zieliński, Jacek
dc.date.accessioned 2014-11-02T18:06:21Z
dc.date.available 2014-11-02T18:06:21Z
dc.date.issued 2008-07-21
dc.identifier.citation Ecological Questions, Vol. 10, pp. 57-61
dc.identifier.issn 1644-7298
dc.identifier.other doi:10.12775/v10090-009-0007-y
dc.identifier.uri http://repozytorium.umk.pl/handle/item/2221
dc.description.abstract Quantitative studies of winter avifauna (1999/2000) were conducted in three fragments of urban green areas in central Poland. Two observers independently controlled three plots six times, doing two subsequent counts (10 ha/1.5 hour) on the same day. All visits that were carried out in the same plot by the same observer during the same time of day were defined as a "survey". Differences between maximum and minimum values of similarity in species composition (Sørensen index - QS) and dominance structures (Renkonen index - Re) between two plots during all "surveys" ranged from 8.4 to 11.9% (QS) and from 11.8 to 22.4% (Re). Coefficients of variation (CV) for values of Sørensen and Renkonen indexes obtained for similarity of winter avifauna between two plots during all "surveys" ranged from 4.9 to 7.6% (QS) and from 8.9 to 14.1% (Re). Significant differences were found in one case between values of similarity in species composition (QS) obtained by two observers between two different plots (Mann-Whitney test, U = 0.0, n = 8, P = 0.02). The results show that there is no possibility to estimate clearly the similarity of dominance structure (Re) and, to a lesser degree, species composition (QS) of winter avifauna between two small fragments of the urban green areas.
dc.language.iso eng
dc.rights Attribution-NoDerivs 3.0 Poland
dc.rights info:eu-repo/semantics/openAccess
dc.rights.uri http://creativecommons.org/licenses/by-nd/3.0/pl/
dc.subject Sørensen index
dc.subject Renkonen index
dc.subject species composition
dc.subject winter avifauna
dc.subject urban avifauna
dc.title The possibility of application of Sørensen and Renkonen indexes in the study of winter avifauna in small plots of the urban green areas
dc.type info:eu-repo/semantics/article


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