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Specific ecological structure and function of the river stretch also with regard to the whole catchment/sub-basin and in relation to ecosystems services. E.g. particular habitats for sensitive/valuable fish species or other biological quality elements in the riverine ecology (e.g. red list species.

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Source: EUR-Lex (Cellar) · retrieved 2026-09-25 · Text as adopted (Official Journal); later amendments are not incorporated in this text.