Offermann et al - Ecohydrological changes and potential Salmon habitat suitability

Abstract: Channel patterns and river connectivity are widely recognized to be an integral descriptive parameter for the geomorphic behaviour and ecohydrological properties of rivers. They are sensitively affected by climate and land-use changes and, in turn, can indicate the habitat suitability for the aquatic fauna, i.a. expressed by the diversity of channel width, flow velocity and depositional regimes. Both, habitat potential and the overall river connectivity are additionally influenced by barriers such as weirs and dams, at least since Medieval times. Here we present the results of a multi-temporal study investigating river morphology, river connectivity and floodplain land use in the Mulde River system. The study is motivated by the local extinction of the Atlantic Salmon (Salmo salar) within the last two centuries and low-success reintroduction endeavours. In order to test for a relation to water body structures, we make use of old maps (‘Sächsische Meilenblätter’, 1780-1821; ‘Von Deckersche Quadratmeilenblätter’, 1816-1821) to pinpoint (i) historical barriers and (ii) historical floodplain land use as a pollution proxy that may have affected migratory fish populations. Furthermore, we (iii) evaluate anthropogenic changes in channel patterns assuming that these also influence salmon habitat suitability. Preliminary results point to a negative relation between an increasing number of cumulative barriers, increased floodplain land use and the occurrence of salmon populations during the past. Sinuous and meandering channel patterns correspond with higher probabilities of salmon occurrence. Keywords/Schlagwörter: Lachs; Fluviale Anthroposphäre; Umweltgeschichte; Landesgeschichte; Archäologie; Geografie; Auenlandschaften; Altkarten; Fluviale Morphologie; salmon; fluvial anthroposphere; environmental history; regional history; archaeology; geography; floodplain landscapes; Old Maps; fluvial morphology; salmo salar

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Martin Offermann (0009-0005-0755-1854); Michael Hein (0000-0002-5500-4020); Ronja Hegemann; Kay Gödecke; Lucas Hegner; Yamuna Henke; Nele Schäfer; Hanna Shelukhina; Erik Liebscher (0009-0006-5754-1694); Severin Opel (0009-0009-7131-2144); Johannes Rabiger-Völlmer (0000-0002-5499-5889); Lukas Werther (0000-0003-4128-7370); Christoph Zielhofer (0000-0001-9551-4466) (2025). Offermann et al - Ecohydrological changes and potential Salmon habitat suitability [Data set]. DAI. https://doi.org/10.34780/pqp6jpwh
Retrieved: 17:06 05 Jun 2025 (UTC)

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Author(s) Martin Offermann ORCID ID: 0009-0005-0755-1854
Michael Hein ORCID ID: 0000-0002-5500-4020
Ronja Hegemann
Kay Gödecke
Lucas Hegner
Yamuna Henke
Nele Schäfer
Hanna Shelukhina
Erik Liebscher ORCID ID: 0009-0006-5754-1694
Severin Opel ORCID ID: 0009-0009-7131-2144
Johannes Rabiger-Völlmer ORCID ID: 0000-0002-5499-5889
Lukas Werther ORCID ID: 0000-0003-4128-7370
Christoph Zielhofer ORCID ID: 0000-0001-9551-4466
Người bảo dưỡng Martin Offermann
Phiên bản 1.0
Last Updated tháng 6 3, 2025, 14:46 (UTC)
Được tạo ra tháng 6 3, 2025, 10:49 (UTC)
Subtitle Ecohydrological changes and potential Salmon habitat suitability since pre-industrial times at the Mulde River (Germany)
Publisher Deutsches Archäologisches Institut
Funding DFG, SPP 2361
In Language English
Year of publication 2025
Resource Type General Preprint
DOI 10.34780/pqp6jpwh