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2008 | 10 |

Tytuł artykułu

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

Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
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.

Wydawca

-

Rocznik

Tom

10

Opis fizyczny

p.57-61,ref.

Twórcy

autor
  • Department of Vertebrate Zoology, Institute of Ecology and Environment Protection, N.Copernicus University, Gagarina 9, 87-100 Torun, Poland
autor

Bibliografia

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Typ dokumentu

Bibliografia

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