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Importance of landscape context for post-restoration recovery of riparian vegetation
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences. Key Laboratory of Eco-Environments in Three Gorges Reservoir Region (Ministry of Education), Chongqing Key Laboratory of Plant Ecology and Resources in Three Gorges Reservoir Region, School of Life Sciences, Southwest University, Chongqing, China.ORCID iD: 0000-0001-8777-337X
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences. Department of Environmental and Life Sciences, NRRV, Karlstad University, Karlstad, Sweden.ORCID iD: 0000-0002-7212-8121
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences. Department of River Ecology and Conservation, Senckenberg Research Institute and Natural History Museum Frankfurt, Gelnhausen, Germany.
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2019 (English)In: Freshwater Biology, ISSN 0046-5070, E-ISSN 1365-2427, Vol. 64, no 5, p. 1015-1028Article in journal (Refereed) Published
Abstract [en]

We tested whether the recovery of riparian vegetation along rapids that have been restored after channelisation for timber floating can be predicted based on floristic and geomorphic characteristics of surrounding landscape units. Our study was located along tributary stream networks, naturally fragmented in rapids, slow-flowing reaches, and lakes (i.e. process domains), in the Vindel River catchment in northern Sweden.

We tested whether landscape characteristics, specifically to what extent the geomorphology (affecting local abiotic conditions), species richness, and species composition (representing the species pool for recolonisation), as well as the proximity to various upstream process domains (determining the dispersal potential), can predict post-restoration recovery of riparian vegetation.

Our results indicate that post-restoration recovery of riparian vegetation richness or composition is not strongly related to landscape-scale species pools in these streams. The restored rapids were most similar to upstream rapids, geomorphically and floristically, including plant traits. Species richness of adjacent landscape units (upstream process domains or lateral upland zone) did not correlate with that of restored rapids, and proximity of upstream rapids or other process domains was only weakly influential, thus diminishing support for the hypothesis that hydrochory or other means of propagule dispersal plays a strong role in riparian vegetation community organisation after restoration in this fragmented stream network.

We conclude that, in these naturally fragmented stream systems with three discrete process domains (rapids, slow-flowing reaches and lakes), hydrochory is probably not the main predictor for short-term riparian vegetation recovery. Therefore, other factors than landscape context can serve in prioritising restoration and, in these systems, local factors are likely to outweigh landscape connectivity in the recovery of riparian vegetation.

Place, publisher, year, edition, pages
John Wiley & Sons, 2019. Vol. 64, no 5, p. 1015-1028
Keywords [en]
hydrochory, plant dispersal, riparian zone, species pool, streams
National Category
Ecology
Identifiers
URN: urn:nbn:se:umu:diva-159391DOI: 10.1111/fwb.13282ISI: 000466805700016OAI: oai:DiVA.org:umu-159391DiVA, id: diva2:1322299
Available from: 2019-06-10 Created: 2019-06-10 Last updated: 2019-06-10Bibliographically approved

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Su, XiaoleiPolvi, Lina E.Lind, LovisaPilotto, FrancescaNilsson, Christer

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Su, XiaoleiPolvi, Lina E.Lind, LovisaPilotto, FrancescaNilsson, Christer
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