Suche...
Generic filters
Filter by Themen
Abwasserbehandlung
Analytik & Hygiene
Digitalisierung
Energie
Engineering
Events
Kosten & Tarife
Nachhaltigkeit & Umweltschutz
Netze
Politik
Recht & Regelwerk
Wasseraufbereitung
Wassergewinnung
Wasserstress
Water Solutions
Filter by Kategorien
Branche
Forschung & Entwicklung
Leute
People
Products & Solutions
Produkte & Verfahren
Publications
Publikationen
Sonstiges
Trade & Industry
Filter by Kategorien
Firmenverzeichnis
Geschützte Downloads
Mediadaten
Öffentliche Downloads
Filter by Veranstaltungsschlagworte
abwasser
ACHEMA
Automatisierung
FDBR
kanalnetze
MSR
Talsperren
trinkwasser
wasseraufbereitung
wasserbau
Wassernetze
Wasserversorgung

Dams exacerbate impact of climate change on river fish

Kategorie:
Autor: Jonas Völker

Dams exacerbate impact of climate change on river fish

River ecosystems are frequently fragmented by dams and weirs. As a result, native fish are often restricted in their movement along the river course and are unable to colonize new habitats. Thus, barriers impede native species from adjusting their distributions in response to the effects of climate change such as changes in water temperature and quality.
On the other hand, river fragmentation might also limit the further spread of invasive alien species. Using the Ebro River in Spain as an example, the research team has investigated how habitats of native and alien fish species change under different climate scenarios and how dams mediate habitat accessibility.
"The Ebro River is particularly vulnerable and threatened by climate change and species invasions. In addition, the Ebro River is fragmented by over 300 dams and many smaller barriers, which makes it even worse for the native fish species", said Emili García-Berthou, Professor at the University of Girona and co-author of the study.

Native species partly disappear, leaving space for alien species

By applying a spatial modelling framework, the authors showed that losses of native species and gains of alien species and consequentially most pronounced biodiversity changes are particularly expected in the lower and mid reaches of larger Ebro River tributaries. According to their results, the majority of species are projected to shift their range in upstream direction with alien species such as eastern mosquitofish, wels catfish and common carp showing especially large habitat gains.
"The Ebro River system is home to several endemic species that exclusively occur on the Iberian Peninsula. These species are particularly imperiled by barriers that limit movements in response to climate change. Whether dams can effectively prevent the spread of alien species is questionable. In fact, the establishment of alien fishes is often facilitated by the changed flow and habitat conditions that result from damming rivers", said IGB researcher Johannes Radinger, lead author of the study. The results clearly show that fish communities in highly fragmented rivers affected by climate change will be particularly affected by biodiversity changes and species loss in the future. "Effective conservation of fishes should focus on the restoration of habitats and the natural flow regime, improvements of connectivity for native species and the control of alien species, particularly the prevention of further introductions", concluded the authors.
The publication of the whole study can be found here.

Das könnte Sie auch interessieren:

20 Jahre Wasserrahmenrichtlinie: Deutschland liegt weit hinter seinen Zielen zum Gewässerschutz
Analysis of microplastics of a broad size range
Atlas shows how global surface water resources have changed throughout the last decades

Passende Firmen zum Thema:

Thema: Netze

ERHARD GmbH & Co. KG

Thema: Netze

Armaturen und Formstücke der Marken ERHARD, FRISCHUT & SCHMIEDING

Publikationen

Fused connecting lines made of HDPE in Düsseldorf

Fused connecting lines made of HDPE in Düsseldorf

Autor: Alexander Schuir / Hanjo Kanne / Kai Büßecker
Themenbereich: 3R

Home to about 600,000 inhabitants, the state capital of North Rhine-Westphalia Düsseldorf, like any other city, is constantly endeavouring to provide its citizens, commuters, and guests with a fully functional infrastructure to meet the demands of ...

Zum Produkt

Quality Assurance and modern data management

Quality Assurance and modern data management

Autor: Jörg Sebastian
Themenbereich: 3R

...

Zum Produkt

Rehabilitation of large profiles lacking long-term stability

Rehabilitation of large profiles lacking long-term stability

Autor: Dietmar Beckmann / Heinz Doll / Vladimir Lacmanović
Themenbereich: 3R

Many large interceptor sewers, predominantly installed under public roads, have been in use for over 100 years. They are made of brickwork or compressed concrete and often show serious damage, so that it would seem that long-term stability can no ...

Zum Produkt

Mehr Publikationen...

Sie möchten die gwf Wasser + Abwasser testen

Bestellen Sie Ihr kostenloses Probeheft

Überzeugen Sie sich selbst: Gerne senden wir Ihnen die gwf Wasser + Abwasser kostenlos und unverbindlich zur Probe!

Finance Illustration 03