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River wood restoration boosted native fish numbers
Reintroducing thousands of large wood pieces into a Murray River reach increased Murray cod and golden perch by drawing immigrants from connected source populations.
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What restoration method was used?
Reintroducing coarse woody habitat (resnagging).
Source: Increased population size of fish in a lowland river following restoration of structural habitat · DOI · quote verified
How many large wood pieces were added, and when?
4,450 pieces between 2007 and 2010.
Source: Increased population size of fish in a lowland river following restoration of structural habitat · DOI · quote verified
Which two native predators were modeled?
Murray cod and golden perch.
Source: Increased population size of fish in a lowland river following restoration of structural habitat · DOI · quote verified
How many Murray cod and golden perch were captured in the census?
7,312 Murray cod and 3,743 golden perch.
Source: Increased population size of fish in a lowland river following restoration of structural habitat · DOI · quote verified
What happened to Murray cod in the restored reach versus isolated population 4?
Restored reach increased; population 4 fell 40%.
Source: Increased population size of fish in a lowland river following restoration of structural habitat · DOI · quote verified
What study design provided the before baseline?
Unreplicated before/after-control/impact (BACI).
Source: Increased population size of fish in a lowland river following restoration of structural habitat · DOI · quote verified
Where is the intervention reach?
Murray River from about 120 km below Lake Hume to Lake Mulwala.
Source: Increased population size of fish in a lowland river following restoration of structural habitat · DOI · quote verified
What process filled the restored reach?
Net immigration from connected source populations.
Source: Increased population size of fish in a lowland river following restoration of structural habitat · DOI · quote verified
How many permanent location changes were condensed from telemetry logs?
558 permanent location changes from more than six million records.
Source: Increased population size of fish in a lowland river following restoration of structural habitat · DOI · quote verified
Did the authors conclude the restored reach gained fish after habitat restoration?
Yes—population size of target species increased in the intervention reach.
Source: Increased population size of fish in a lowland river following restoration of structural habitat · DOI · quote verified
Why can connectivity make restoration succeed?
Source populations can supply adult recruits to a restored reach (field-of-dreams idea).
Source: Increased population size of fish in a lowland river following restoration of structural habitat · DOI · quote verified