Modelling of riverine ecosystems by integrating models: conceptual approach, a case study and research agenda

摘要: Aim Highly complex interactions between the hydrosphere and biosphere, as well multifactorial relationships, characterize interconnecting role of streams rivers different elements a landscape. Applying species distribution models (SDMs) in these ecosystems requires special attention because are linear systems their abiotic biotic conditions structured fashion with significant influences from upstream/downstream or lateral adjacent areas. Our aim was to develop modelling framework for benthic invertebrates riverine test our approach data-rich study catchment. Location We present case 9-km section lowland Kielstau River located northern Germany. Methods linked hydrological, hydraulic predict habitat suitability bivalve Sphaerium corneum system. The results generated by hydrological model served inputs into model, which used simulate resulting water levels, velocities sediment discharge within stream channel. Results ensemble obtained good evaluation scores (area under receiver operating characteristic curve 0.96; kappa 0.86; true skill statistic 0.95; sensitivity 86.14; specificity 85.75). Mean values variables at sampling sites were not significantly predicted (MannWhitney U-test P > 0.05). High occurrence probabilities downstream half Kielstau. most important variable (contributing 40%), followed depth (30%), flow velocity (19%) power (11%). Main conclusions able produce predictors, acting spatial scales, known influence organisms; which, turn, SDMs input. yielded results, corresponded ecological knowledge about organism. Although this method is feasible making projections on local scale (here: reach small catchment), we discuss remaining challenges future approaches large-scale applications.