The distribution of blackberry (Rubus hirtus W. K.) in different scales : the fractal analysis

• Autorzy: Gazda A.
• Języki publikacji: EN

Abstrakty

EN

The scale dependence of natural patterns provides an opportunity to apply fractal geometry to diverse problems in "spatial" ecology so as to integrate the spatial and temporal characteristics of complex environments. In this paper I attempt to explore the scaling dependency of in an autecological study on blackberry across a range of scales by applying. The fractal dimension of: the blackberry (Rubus hirtus W. K.) distribution within its geographical range is 1.44 +- 0.02; the pattern in the Gorce National Park (5908 ha) is 1.47 +- 0.05; the pattern for Łopuszna Valley (49 stopni 34'N, 20 stopni 08'E) (185.86 ha) is 1.30 +- 0.09 and 1.32 +- 0.05 for the Ratanica watershed (49 stopni 51'N, 20 stopni 02'E) (121.76 ha) (Fig. 1); the distribution of blackberry within the six plots located within the Ratanica watershed has values: 1.21 +- 0.09 to 1.45 +- 0.06. On the gap plot, located within Ratanica watershade, created in 1987, year the fractal dimension of blackberry distribution increased from 1.21 +- 0.16 to 1.60 +- 0.04 during 5 successive years (Fig. 2). In the same region, on plot located under the dense forest, D of blackberry distribution has not changed and reached value 1.28 +- 0.05. This study demonstrates that the distribution pattern is heavily influenced by scale. There are no possibilities to detect any breakpoint at scale intervals within the range of spatial scales studied, because the study of pattern was carried out on a noncontinuous scale (Fig. 4).

Słowa kluczowe

EN

blackberry; fractal dimension

• Wydawca: Museum and Institute of Zoology, Polish Academy of Sciences
• Czasopismo: Polish Journal of Ecology
• Rocznik: 1998
• Tom: Vol. 46, no 3
• Strony: 225--235
• Opis fizyczny: Bibliogr. 26 poz.

Twórcy

autor

Gazda A.

• Department of Forest Botany and Nature Conservation, Agricultural University, al.29-Listopada 46, 31-425 Cracow, Poland

Bibliografia

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