2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/24/2018 | 11:30 AM - 11:45 AM | HIERARCHICAL SCALE-DEPENDENCY IN FRESHWATER SPECIES DISTRIBUTION MODELS: HOW DOES THE PREDICTOR IMPORTANCE CHANGE WITH VARYING SPATIAL SCALES? | 310 B
HIERARCHICAL SCALE-DEPENDENCY IN FRESHWATER SPECIES DISTRIBUTION MODELS: HOW DOES THE PREDICTOR IMPORTANCE CHANGE WITH VARYING SPATIAL SCALES?
Species distribution models (SDMs) are an important tool to assess the potential habitat suitability for species over large spatial scales, and are increasingly used in freshwater ecology. Key aspects that have not been tested in freshwater SDMs are i) how the predictor importance changes according to the size of spatial units used (e.g. (sub-) catchments) and ii) how the interplay between the used predictors and spatial units affect the model outcomes. Predictor importance and model outcomes can play a key role for decision making in e.g. conservation actions. To test these key aspects, we ran SDMs across ten different hierarchical catchment scales (ranging from 2 km² to 500 km²) for a set of native fish species in the Upper Danube catchment in Europe. For each species and catchment scale, we then compared the model outputs together with the relative predictor importance. We show how model outputs depend on the spatial scale on which they are assessed, and give guidance regarding the choice of predictors at varying scales. Our results provide useful insights into factors influencing species occurrence across spatial scales, and into the further development of freshwater SDMs.
- Distribution
- Modeling
- Spatial
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Presenters/Authors
Martin Friedrichs
(), Leibniz-Institute for Freshwater Ecology and Inland Fisheries, friedrichs@igb-berlin.de;
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Florian Pletterbauer
(), Institute of Hydrobiology and Aquatic Ecosystem Management (IHG), University of Natural Resources and Life Sciences Vienna (BOKU), Max Emanuel Strasse 17, 1180 Vienna, Austria, florian.pletterbauer@boku.ac.at;
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Thomas Hein
(), Institute of Hydrobiology and Aquatic Ecosystem Management (IHG), University of Natural Resources and Life Sciences Vienna (BOKU), Max Emanuel Strasse 17, 1180 Vienna, Austria, thomas.hein@boku.ac.at;
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Harald Kling
(), Pöyry Energy GmbH, Kranichberggasse 4, 1120 Vienna, Austria, harald.kling@poyry.com;
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Simone D. Langhans
(), University of Otago and BC3 - Basque Centre for Climate Change, simone.langhans@otago.ac.nz;
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Sonja C. Jähnig
(), Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany , sonja.jaehnig@igb-berlin.de;
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Sami Domisch
(), Leibniz Institute of Freshwater Ecology and Inland Fisheries, domisch@igb-berlin.de;
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