Fishecological status of the River Pöls in the area influenced by the Pöls-papermill
Abstract
Aim of the study is to gather and assess the current fish-ecological situation of the River Pöls as well as the assessment of the status of fish-ecological integrity according to the EU-Water Framework Directive. The current status of the river will be assessed by comparing its alterations to the natural situation. As assessment criteria different metrics like species diversity, species composition, size of populations, age structure and reproductive success will be taken into account. Parameters like density or biomass are important elements but also population structures as well as occurrence of type-specific species are important metrics in the process of assessment. For gathering the fish stock of the River Pöls it will be necessary to survey different stretches with varying types of alterations along the whole river course. By means of electro-fishing stretches upstream the Pöls-papermill, which represent the uninfluenced river as well as stretches downstream to mouth into the River Mur will be fished. Stretches will be selected in a way to cover all types of alterations. It is planned, to gather the total fish stock in spring/summer 2004 (1), to map the spawning grounds of grayling and Danube salmon in the area of the river mouth in spring 2004 (2), and to sample juvenile stages in late summer 2004 (3). Furthermore it will be important to highlight the historical evolution of the River Pöls (4). Historical inquiries are the basis to analyse the deficits of the river ecosystem and to develop a picture of the pristine situation of the river (“Leitbild”). Data analysis and interpretation as well as assessment of the fish ecological status of the River Pöls will be finished by October 2004. Finally the results of different work groups will be compiled to a final study report.
keywords Pöls Ecological Integrity Fish Assessment Papermill
Publikationen
Erhebung des fischökologischen Ist-Zustandes der Pöls im Einflussbereich des Zellstoffwerkes Pöls AG
Autoren: Unfer G., Wiesner C., Emerstorfer N., Washüttl B., Jungwirth M. Jahr: 2005
Expertengutachten (extern. Auftraggeber)
Project staff
Mathias Jungwirth
Em.O.Univ.Prof. Dr.phil. Mathias Jungwirth
mathias.jungwirth@boku.ac.at
Tel: +43 1 47654-81250
Project Leader
01.03.2004 - 28.02.2005
Günther Unfer
Dipl.-Ing. Dr.nat.techn. Günther Unfer
guenther.unfer@boku.ac.at
Tel: +43 1 47654-81213
Sub Projectleader
01.03.2004 - 28.02.2005
Christian Wiesner
Dipl.-Ing. Dr.nat.techn. Christian Wiesner
christian.wiesner@boku.ac.at
Project Staff
01.03.2004 - 28.02.2005