The Coefficients of Ecological Stability

7.5.2.1 Coefficient of Ecological Stability 1

This coefficient of ecological stability 1 (Low 1984) is based on assignment of ecological significance coefficient from A to E to each secondary structure element. The highest value of ecological significance coefficient achieves areas of forests and water areas, which are hereby the most stable landscape elements, and the formula for the coefficient (CES) is as follows:

Подпись: CES11.5A + B + 0.5C

0. 2D + 0.8E where A is areas with ecological stability (ES) degree 5 (forest, water areas); B is areas with ES degree 4 (bank overgrown, greenways); C is areas with ecological stability degree 3 (meadow, pastureland); D is areas with ecological stability degree 2 (arable land); and E represents areas with ecological stability degree 1 (built-up areas).

Attributes of the coefficient are interpreted thus:

CESi

< 0.1

Degraded landscape

CESj

< 1

Disrupted landscape

CES1

= 1

Balanced landscape

CES1

1-10

Landscape with dominating natural elements

CES1

> 10

Natural or almost natural landscape

7.5.2.2 Coefficient of Ecological Stability 2

According to Rehackova and Pauditsova (2007) the CES2 calculation considers the total area of particular landscape structure elements and the degree of their

The Coefficients of Ecological Stability

ecological stability (the ecological stability degree varies between 0 and 5). These degrees are assigning in accordance to Low (1984). In comparison with Low’s work, there are amplified other landscape structure elements with their ecological stability degree. For the assessment of ecological stability coefficient is proposed the use of following formula, which considers acreage deal of landscape structure elements and the degree of their ecological stability in the assessment area:

where Pi is the area of secondary landscape structure (SLS) elements; Si is the ecological stability degree of land-use elements; p is the total area; and n is the number of SLS elements in territory.

Attributes of the coefficient CES2 are interpreted thus:

Подпись: 1.0- 1.49 1.50-2.49 2.0- 3.49 3.0- 4.49 4.0- 5.00 Landscape with very low ecological stability Landscape with low ecological stability Landscape with medium ecological stability Landscape with high ecological stability Landscape with very high ecological stability