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Wetlandscape size thresholds for ecosystem service delivery: Evidence from the Norrström drainage basin, Sweden
Stockholm University, Faculty of Science, Department of Physical Geography.
Stockholm University, Faculty of Science, Department of Ecology, Environment and Plant Sciences.ORCID iD: 0000-0001-6362-6199
Stockholm University, Faculty of Science, Department of Physical Geography.ORCID iD: 0000-0001-6111-4819
Stockholm University, Faculty of Science, Department of Physical Geography.ORCID iD: 0000-0002-4587-6706
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Number of Authors: 62020 (English)In: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 704, article id 135452Article in journal (Refereed) Published
Abstract [en]

Wetlands are interconnected with the larger surrounding landscape through the hydrological cycling of water and waterborne substances. Therefore, the borders of individual wetlands may not be appropriate landscape system boundaries for understanding large-scale functions and ecosystem services of wetlandscapes (wetland network - landscape systems), and how these can be impacted by climate and land-use changes. Recognizing that such large-scale behaviours may not be easily predicted by simple extrapolation of individual wetland behaviours, we here investigate properties of 15 Swedish wetlandscapes in the extensive (22 650 km(2)) Norrstrom drainage basin (NDB) comprising as many as 1699 wetlands. Results based on wetland survey data in combination with GIS-based ecohydrological analyses showed that wetlands located in wetlandscapes above a certain size (in the NDB: similar to 250 km(2)) consistently formed networks with characteristics required to support key ecosystem services such as nutrient/pollutant retention and biodiversity support. This was in contrast to smaller wetlandscapes (<250 km(2)), which had smaller and less diverse wetlands with insufficient throughflow to significantly impact large-scale flows of water and nutrients/pollutants. The existence of such wetlandscape-size thresholds is consistent with scale-dependent flow accumulation patterns in catchments, suggesting likely transferability of this result also to other regions.

Place, publisher, year, edition, pages
2020. Vol. 704, article id 135452
Keywords [en]
Wetlandscape, Wetland function, Ecohydrological characteristics, Nutrient retention, Biodiversity support, Wetland management
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:su:diva-178787DOI: 10.1016/j.scitotenv.2019.135452ISI: 000504672800156PubMedID: 31810688OAI: oai:DiVA.org:su-178787DiVA, id: diva2:1395655
Available from: 2020-02-24 Created: 2020-02-24 Last updated: 2020-03-05Bibliographically approved

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Åhlén, ImenneHambäck, PeterThorslund, JosefinFrampton, AndrewDestouni, GeorgiaJarsjö, Jerker
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