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Forested Riparian Zones Provide Important Habitat for Fish in Urban Streams

Kupilas, Benjamin and Burdon, Francis and Thaulow, Jens and Hall, Johnny and Mutinova, Petra Thea and Forio, Marie Anne Eurie and Witing, Felix and Risnoveanu, Geta and Goethals, Peter and Mckie, Brendan and Friberg, Nikolai (2021). Forested Riparian Zones Provide Important Habitat for Fish in Urban Streams. Water. 13 , 877
[Research article]

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Abstract

Riparian zones form a boundary between aquatic and terrestrial ecosystems, with disproportionate influences on food web dynamics and ecosystem functioning in both habitats. However, riparian boundaries are frequently degraded by human activities, including urbanization, leading to direct impacts on terrestrial communities and indirect changes that are mediated through altered connectivity with adjacent aquatic ecosystems. We investigated how riparian habitat influences fish communities in an urban context. We electrofished nine urban site pairs with and without forested riparian buffers, alongside an additional 12 sites that were located throughout the river networks in the Oslo Fjord basin, Norway. Brown trout (Salmo trutta) were the dominant fish species. Riparian buffers had weak positive effects on fish densities at low to moderate levels of catchment urbanization, whereas fish were absent from highly polluted streams. Subtle shifts in fish size distributions suggested that riparian buffers play an important role in metapopulation dynamics. Stable isotopes in fish from buffered reaches indicated dietary shifts, pointing to the potential for a greater reliance on terrestrial-sourced carbon. Combining these results, we postulate that spatially-mediated ontogenetic diet shifts may be important for the persistence of brown trout in urban streams. Our results show that using a food web perspective is essential in understanding how riparian buffers can offset impacts in urban catchments.

Authors/Creators:Kupilas, Benjamin and Burdon, Francis and Thaulow, Jens and Hall, Johnny and Mutinova, Petra Thea and Forio, Marie Anne Eurie and Witing, Felix and Risnoveanu, Geta and Goethals, Peter and Mckie, Brendan and Friberg, Nikolai
Title:Forested Riparian Zones Provide Important Habitat for Fish in Urban Streams
Series Name/Journal:Water
Year of publishing :2021
Volume:13
Article number:877
Number of Pages:19
Publisher:MDPI
ISSN:2073-4441
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Oceanography, Hydrology, Water Resources
Keywords:aquatic-terrestrial linkages, salmonids, food webs, stable isotopes, urban stream syndrome, urbanization, nature-based solutions, blue-green infrastructure
URN:NBN:urn:nbn:se:slu:epsilon-p-112254
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-112254
Additional ID:
Type of IDID
DOI10.3390/w13060877
Web of Science (WoS)000651942500001
ID Code:24518
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Aquatic Sciences and Assessment
Deposited By: SLUpub Connector
Deposited On:11 Jun 2021 11:43
Metadata Last Modified:11 Jun 2021 11:52

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