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Territorial system of ecological stability

The Territorial System of Ecological Stability (TSES), as defined in Czech act No. 114/1992 Gazette, section 3, article a), is a mutually interconnected complex of both natural and near-natural, altered ecosystems that maintain natural balance. Its main purpose is to reinforce ecological stability of the landscape by conservation or restoration of ecosystems and their mutual interconnection.

TSES elements


This is defined as a biotope or centre of biotopes in a landscape, which, due to its condition and scope, facilitates the existence of a natural or near-natural, altered ecosystem.

Ecological corridor

This is a territory that does not facilitate permanent or long-term existence of a significant number of organisms, but does provide for their migration between different biocentres, creating a network of isolated biocentres.

Interaction element

This is defined as a landscape segment, which, on a local level, mediates the favourable effect of basic TSES elements (biocentres and biological corridors) on surrounding less stable landscape. Besides this, interaction elements often enable the permanent existence of certain species with limited territorial requirements (besides a range of plant species, these include some species of insects, small rodents, insectivores, birds, amphibians etc.).

TSES categories according to significance

Supraregional TSES

These are vast (at least 1000 ha) landscape units and areas of ecological significance, forming a network providing conditions for the existence of characteristic coenosis together with complete biota biodiversity in the context of a certain biogeographical region.

Regional TSES

These are landscape units and areas of ecological significance (minimum area of 10 - 50 ha). A network of these units must represent a diversity of biochore types in the context of a certain biogeographical region.

Local TSES

These are small landscape units of ecological significance (area about 5 - 10 ha). A network of these represents biogeocoenosis type groups in the context of a certain biochore.

TSES plans

TSES are established by plans that should include in particular the following:

a) a draft map of existing and proposed biocentres and ecological corridors with marked protected areas to a minimum scale of 1:50 000 (supraregional and regional TSES) or  1:10 000 (local TSES).

b) a table and a theoretical section describing functional and spatial factors

c) detailed rationale including outline measures for its conservation or regeneration.

The TSES plan serves as documentation for TSES projects, land consolidations and land replotting, processing of territorial planning documentation, forest management plans, water management documents and other documents regarding protection and restoration of the landscape.

TSES elements are being established in 2005 in almost all PLA territory with a few exceptions.



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