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Characterization of habitat requirements of European fishing spiders
Inland Norway University of Applied Sciences, NOR; Norwegian University of Sciences and Technology, NOR.
Inland Norway University of Applied Sciences, NOR.
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Environmental and Life Sciences (from 2013). University of Rennes, FRA.ORCID iD: 0000-0002-6205-611x
Inland Norway University of Applied Sciences, NOR.ORCID iD: 0000-0002-7625-2816
2022 (English)In: PeerJ, E-ISSN 2167-8359, Vol. 10, article id e12806Article in journal (Refereed) Published
Abstract [en]

Wetlands are among the most threatened habitats in the world, and so are their species, which suffer habitat loss due to climate and land use changes. Freshwater species, and especially arthropods, receive comparatively little attention in conservation plans, and the goals to stop and reverse the destruction of wetlands published 25 years ago in a manifesto by the Union of Concerned Scientists have not been reached. In this study, we investigated the occurrence and habitat requirements at two spatial scales of two species of European fishing spiders Dolomedes, which rely heavily on declining wetland habitats in Sweden and southern Norway. We collected occurrence data for Dolomedes plantarius and Dolomedes fimbriatus, using a live-determination method. We modelled the placement of nursery webs to describe fine-scale habitat requirements related to vegetation and micro-climate. Using a machine learning approach, we described the habitat features for each species and for co-occurrence sites, thus providing insight into variables relevant for the presence and detectability of Dolomedes. Nursery placement is mostly dependent on proximity to water, presence of Carex sp. (Sedges) and crossing vegetation structures, and on humidity, while detection can be affected by weather conditions. Furthermore, co-occurrence sites were more similar to D. plantarius sites than to D. fimbriatus sites, whereby surrounding forest, water type and velocity, elevation and latitude were of importance for explaining which species of Dolomedes was present. Overall, habitat requirements were narrower for D. plantarius compared to D. fimbiratus.

Place, publisher, year, edition, pages
PEERJ INC , 2022. Vol. 10, article id e12806
Keywords [en]
Dolomedes, Pisauridae, Detectability, Red listed species, Conservation
National Category
Ecology
Research subject
Biology
Identifiers
URN: urn:nbn:se:kau:diva-89147DOI: 10.7717/peerj.12806ISI: 000759254100003PubMedID: 35178294OAI: oai:DiVA.org:kau-89147DiVA, id: diva2:1645535
Available from: 2022-03-18 Created: 2022-03-18 Last updated: 2023-08-28Bibliographically approved

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Lafage, Denis

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