Neighbourhood related landscape metrics – methodological evaluation of the indices

Authors

  • Szilárd Szabó University of Debrecen, Department of Physical Geography and Geoinformation Systems, H-4032 Debrecen, Egyetem tér 1.

DOI:

https://doi.org/10.56617/tl.3913

Keywords:

contagion, interspersion, landscape metrics, resolution, error

Abstract

This paper deals with the contagion type landscape metrics from the aspect of their values affected by the number of classes and resolution. In order to explore the meaning of the landscape indices and to follow their change with the increasing dispersal of the habitat patches, theoretical spatial patch patterns were created with the native resolution of 1 km. The effects of resolution was analysed with 100-250-500-1000 m cell size. Influence of class number was controlled by applying 2-3-4 classes. The aim was to present the values of these indices due to the different patterns with an easily understandable method. Secondary goal was to demonstrate the extent of the error when the applied resolution is appropriate. Results show that class number has significant effect on the calculated values as well as the resolution. According to these results we have to take into consideration that we get different aggregation or dispersal values during the analysis of the same area depending on the applied class number. Resolution has more dramatic effect: the half of the optimal grain size (in this case 500 m) provides questionable results. It calls the attention to the importance of the right grain size. Since the appropriate resolution is a not known number, it is reasonable to run several calculations in order to reach the potential minimal and/or maximal values of the given metrics.

Author Biography

  • Szilárd Szabó, University of Debrecen, Department of Physical Geography and Geoinformation Systems, H-4032 Debrecen, Egyetem tér 1.

    szabo.szilard@science.unideb.hu

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Published

2011-12-17

Issue

Section

Articles

How to Cite

Neighbourhood related landscape metrics – methodological evaluation of the indices. (2011). JOURNAL OF LANDSCAPE ECOLOGY | TÁJÖKÖLÓGIAI LAPOK , 9(2), 285-300. https://doi.org/10.56617/tl.3913

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