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Rapid colonization of aquatic communities in an urban stream after daylighting

Ludovic Baho, Didier and Baho, Didier L. and Arnott, David and Myrstad, Karoline D. and Schneider, Susanne C. and Moe, Therese F. (2021). Rapid colonization of aquatic communities in an urban stream after daylighting. Restoration Ecology. 29 , e13394
[Research article]

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Abstract

Restoring aquatic ecosystems is still at an early stage and the outcomes of the remediation techniques used are often not reported, which limit opportunities to learn and further improve these methods. One common remediation technique in urban areas is daylighting, which involves the re-opening of once buried streams with the aim of restoring ecosystem functions and services. In this study, we monitored the colonization of two important aquatic communities, benthic algae and macroinvertebrates, and assessed the nutrient retention capacity of a recently daylighted urban stream in the city of Oslo, Norway. The approach used involved transforming a buried channel into an open stream consisting of interconnected riffles and ponds seeded with aquatic and terrestrial plants. Benthic algal and macroinvertebrate communities begun to colonize the restored stretch within a relatively short time, 9 months following daylighting. The dynamics of the two aquatic communities differed, indicating that spatial processes are influential in determining the establishment of benthic algae, whereas time is more important for macroinvertebrate communities. The observed net nutrient retention from the daylighted stretch for phosphate, total nitrogen, total phosphorus, and calcium were 226, 128, 38 and 14%, respectively. However, the efficiency of the daylighted stretch to sequester nutrients was limited by the lack of controlling nutrient inputs from diffuse sources. This highlights the importance of addressing the influence of broader-scale processes, extending beyond the boundaries of the restored reach, which can otherwise demise the success of daylighting.

Authors/Creators:Ludovic Baho, Didier and Baho, Didier L. and Arnott, David and Myrstad, Karoline D. and Schneider, Susanne C. and Moe, Therese F.
Title:Rapid colonization of aquatic communities in an urban stream after daylighting
Series Name/Journal:Restoration Ecology
Year of publishing :2021
Volume:29
Article number:e13394
Number of Pages:12
Publisher:WILEY
ISSN:1061-2971
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 > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:aquatic communities, benthic algae, daylighting, macroinvertebrates, nutrient retention, stream restoration
URN:NBN:urn:nbn:se:slu:epsilon-p-112116
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-112116
Additional ID:
Type of IDID
DOI10.1111/rec.13394
Web of Science (WoS)000647225400001
ID Code:25019
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Aquatic Sciences and Assessment
Deposited By: SLUpub Connector
Deposited On:25 Aug 2021 13:25
Metadata Last Modified:25 Aug 2021 13:31

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