2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
6/08/2017 | 2:00 PM - 2:15 PM | ASSESSING ANTHROPOGENIC PRESSURES ON STREAM COMMUNITIES: NEW MODELLING APPROACHES BASED ON MACROINVERTEBRATE AND DIATOM ASSEMBLAGES | 302B
ASSESSING ANTHROPOGENIC PRESSURES ON STREAM COMMUNITIES: NEW MODELLING APPROACHES BASED ON MACROINVERTEBRATE AND DIATOM ASSEMBLAGES
Identifying the anthropogenic pressures impairing ecosystems is a challenging task, especially in streams that integrate multiple pressures (related to water quality, land use and hydromorphology) acting at scales from reach to catchment. Such pressure impacts can be assessed investigating local biotic communities. However, biomonitoring methods such as biological indexes mostly aim at assessing the global impairment magnitude, not the identity and respective importance of involved pressures.
Stream organisms are Biological Quality Elements with various combinations of attributes related to mobility, physiology and integration time. This variety allows contrasted responses to different types of pressures. Moreover, habitats act as a templet on which species attributes are selected. In this context, trait combinations can help assessing the ecological impact of specific pressures.
We analyzed combinations of taxonomy- and trait-based descriptors of macroinvertebrate and diatom communities using random forest algorithms. Most of these models have demonstrated a good efficiency to identify specific pressure at large spatial scale and on a wide range of environmental conditions. These results represent a further step in stream ecological diagnostic and can support decision-making processes.
- S27 Advancing Consistency in Ecological Assessments
- C17 Bioassessment
- S30 The future of trait-based approaches in research and management
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Presenters/Authors
Cédric Mondy
(), Interdisciplinary Laboratory of Continental Environments (LIEC), CNRS UMR 7360, University of Lorraine, France, cedric.mondy@gmail.com;
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Floriane Larras
(), Department of Bioanalytical Ecotoxicology, UFZ Helmholtz-Centre for Environmental Research, Leipzig, Germany, floriane.larras@ufz.de;
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Philippe Usseglio-Polatera
(), Interdisciplinary Laboratory of Continental Environments (LIEC), CNRS UMR 7360, University of Lorraine, France, philippe.usseglio-polatera@univ-lorraine.fr;
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