Multiple stressors in small streams in the forestry context of Fennoscandia: The effects in time and space

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Lenka Kuglerová, Eliza Maher Hasselquist, Ryan Allen Sponseller, Timo Muotka, Göran Hallsby, Hjalmar Laudon. Multiple stressors in small streams in the forestry context of Fennoscandia: The effects in time and space. Science of The Total Environment 756 (2021), 143521, ISSN 0048-9697. https://doi.org/10.1016/j.scitotenv.2020.143521

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Title: Multiple stressors in small streams in the forestry context of Fennoscandia: The effects in time and space
Author: Kuglerová, Lenka; Hasselquist, Eliza Maher; Sponseller, Ryan Allen; Muotka, Timo; Hallsby, Goran; Laudon, Hjalmar
Publisher: Elsevier
Date: 2021
Language: en
Belongs to series: Science of The Total Environment 756 (2021), 143521
ISSN: 0048-9697
DOI: https://doi.org/10.1016/j.scitotenv.2020.143521
URI: http://hdl.handle.net/10138/335534
Abstract: In this paper we describe how forest management practices in Fennoscandian countries, namely Sweden and Finland, expose streams to multiple stressors over space and time. In this region, forestry includes several different management actions and we explore how these may successively disturb the same location over 60–100 year long rotation periods. Of these actions, final harvest and associated road construction, soil scarification, and/or ditch network maintenance are the most obvious sources of stressors to aquatic ecosystems. Yet, more subtle actions such as planting, thinning of competing saplings and trees, and removing logging residues also represent disturbances around waterways in these landscapes. We review literature about how these different forestry practices may introduce a combination of physicochemical stressors, including hydrological change, increased sediment transport, altered thermal and light regimes, and water quality deterioration. We further elaborate on how the single stressors may combine and interact and we consequently hypothesise how these interactions may affect aquatic communities and processes. Because production forestry is practiced on a large area in both countries, the various stressors appear multiple times during the rotation cycles and potentially affect the majority of the stream network length within most catchments. We concluded that forestry practices have traditionally not been the focus of multiple stressor studies and should be investigated further in both observational and experimental fashion. Stressors accumulate across time and space in forestry dominated landscapes, and may interact in unpredictable ways, limiting our current understanding of what forested stream networks are exposed to and how we can design and apply best management practices.
Description: Highlights • Streams in Fennoscandian production forests are subject to number of disturbances. • Operations during the forestry rotation cycle introduce stressors to small streams. • Individual stressors interact in time and space causing multiple stressor phenomena. • Aquatic multiple stressors are not well understood in forestry dominated landscapes. • Future research should focus on multiple stressors using experimental approaches.
Subject: best management practice
boreal forest
forestry
headwaters
stream networks
stressors
streams
small streams
Fennoscandia
disturbances
forestry rotation cycle
aquatic multiple stressors
forestry dominated landscapes
experimental approaches
time and space
Finland
Sweden
Subject (ysa): metsät
joet
virtavedet
hakkuut
vesiekosysteemit
ojitus
hyvät käytännöt
tienrakennus
ympäristövaikutukset
Fennoskandia
Suomi
Ruotsi
Rights: This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).


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