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Country-wide analysis of large wood as a driver of fish abundance in Swedish streams: Which species benefit and where?

Donadi, Serena and Sandin, Leonard and Tamario, Carl and Degerman, Erik (2019). Country-wide analysis of large wood as a driver of fish abundance in Swedish streams: Which species benefit and where? Aquatic Conservation: Marine and Freshwater Ecosystems. 29 :5 , 706-716
[Journal article]

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Abstract

1. Rivers are heavily affected by anthropogenic impacts that threaten many fish species. Among restoration measures, the addition of large wood (LW) in streams has been showed to increase fish abundance. However, what species benefit from LW, to what extent relative to other drivers, and what factors influence LW quantity is not clear, which limits our ability to use LW as an effective restoration measure.
2. Here, time series (from 1993 to 2016) of electrofishing data including 3641 streams across Sweden were used to investigate 1) beneficial effects of LW on the abundance of juvenile brown trout Salmo trutta, juvenile Atlantic salmon S. salar, and juvenile and adult sculpins Cottus gobio and C. poecilopus, while accounting for other abiotic and biotic factors, and 2) the drivers of LW abundance at country-wide scale.
3. LW benefitted brown trout, and the effects were larger with decreasing shaded stream surface. LW effects were comparable in magnitude to the positive effects of average annual air temperature and the negative effects of stream depth and predator abundance, factors whose influence was second only to the negative effects of stream width. LW did not benefit salmon abundance, which correlated positively with stream width and negatively with altitude, nor did it benefit sculpin abundances, which mainly decreased with annual average air temperature and altitude.
4. The quantity of LW strongly diminished with stream width, and, to a lesser extent, with stream depth, altitude, annual average air temperature and forest age, while it increased with stream velocity, slope and forest cover.
5. The results suggest that LW can be used as an effective restoration tool for brown trout in shallow and narrow streams, especially in areas with little shade. Here, the addition of large wood could help alleviate the impacts of forest clearance and climate change.

Authors/Creators:Donadi, Serena and Sandin, Leonard and Tamario, Carl and Degerman, Erik
Title:Country-wide analysis of large wood as a driver of fish abundance in Swedish streams: Which species benefit and where?
Year of publishing :2019
Volume:29
Number:5
Page range:706-716
Number of Pages:11
Publisher:Wiley
ISSN:1052-7613
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Accepted version
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Fish and Aquacultural Science
Keywords:Cottus gobio, Cottus poecilopus, path analysis, river restoration, Salmo salar, Salmo trutta
URN:NBN:urn:nbn:se:slu:epsilon-p-100429
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-100429
Additional ID:
Type of IDID
DOI10.1002/aqc.3107
ID Code:16218
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Department of Aquatic Resources
Deposited By: SLUpub Connector
Deposited On:11 Jul 2019 08:44
Metadata Last Modified:03 Sep 2020 14:32

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