best practice in restoration

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The Upper Austrian River Aschach and its tributaries Sandbach and Leitenbach were heavily degraded by river engineering decades ago. Nevertheless, a large ...
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BEST PRACTICE IN RESTORATION THE 10th EUROPEAN CONFERENCE ON ECOLOGICAL RESTORATION ABSTRACT VOLUME August 22–26, 2016, Freising, Germany

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IMPRESSUM

Sonja Weber

Editors

Layout and Cover

Johannes Kollmann & Julia-Maria Hermann

[email protected]

Publisher

This publication will be available at

Chair of Restoration Ecology,

http://www.roek.wzw.tum.de

Technische Universität München

ISBN 978-3-00-053734-9 (PDF)

The respective authors are solely responsible

Keywords: ecological restoration, best practice,

for the contents of their contributions in this

15% target, European case studies, knowledge

book.

base

SER Europe Conference 2016: Best Practice in Restoration, August 22–26, Freising, Germany

21 SESSION 1-O5 – RIVER RESTORATION FROM THEORY TO PRACTICE

THE IMPORTANCE OF LEITBILD-SPECIFIC MEASURES FOR THE SUCCESS OF RIVER RESTORATION PROJECTS USING THE EXAMPLES OF THREE UPPER AUSTRIAN WATERCOURSES Christian Scheder, Ulrike Bart, Klaus Berg, Daniela Csar, Michael Schauer, Clemens Gumpinger DNCVVƒUEJG79GNU#6UEJGFGT"DNCVVƒUEJCV

• The• Upper• Austrian• River• Aschach• and• its• tributaries• Sandbach• and• Leitenbach• were• heavily• degraded• by• river• engineering• decades• ago.• Nevertheless,• a• large• number• of• threatened•species•like•bullhead• (Cottus•gobio),•bitterling• (Rhodeus• amarus),• Ukrainian• brook• lamprey• (Eudontomyzon• mariae)• or• thick-shelled• river• mussel• (Unio• crassus)• still• have• remnant• populations• there.• Hence,• several• restoration• projects• have• been• performed•since•2005,•including•both•the•restoration•of•the•connectivity•and•extensive• hydromorphological• measures.• In• the• main• river• Aschach• and• its• smaller• tributary• Sandbach,•no•constraints•restricted•the•restoration•measures,•so•these•two•watercourses• could• be• reconstructed• according• to• their• respective• leitbild.• In• the• Leitenbach• brook,• however,• the• leitbild• could• not• be• complied• with• due• to• a• bridge• scour• protection• that• enforced• a• slope• far• too• low• for• the• biocoenotic• region.• Throughout• the• restoration• measures,• comprehensive• biological• studies• were• carried• out• in• order• to• monitor• the• †‡˜‡Ž‘’‡–‘ˆ–Š‡…‘‡‘•‡•ƒ†‘ˆ–Š‡‡…‘Ž‘‰‹…ƒŽ‹–‡‰”‹–›Ǥ‡–Š‹…‹˜‡”–‡„”ƒ–‡•ǡϐ‹•Š communities,• najads• and• decapods• were• studied• before• and• after• several• stages• of• the• ”‡•–‘”ƒ–‹‘™‘”•Ǥ –™ƒ••Š‘™–Šƒ–ƒŽ‡‹–„‹Ž†Ǧ•’‡…‹ϐ‹…•Ž‘’‡™ƒ•…”—…‹ƒŽˆ‘”–Š‡•—……‡•• of•restoration•projects.•While•in•the•River•Aschach•and•the•Sandbach•brook•the•measures• Š‡Ž’‡† –‘ ˆ—Žϐ‹Ž –Š‡ ‘„Œ‡…–‹˜‡• ‘ˆ –Š‡ ™ƒ–‡” ˆ”ƒ‡™‘” †‹”‡…–‹˜‡ǡ –Š‡› ƒ‰‰”ƒ˜ƒ–‡† –Š‡ situation•in•the•Leitenbach•brook.

SER Europe Conference 2016: Best Practice in Restoration, August 22–26, Freising, Germany