2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/21/2019 | 11:30 AM - 11:45 AM | QUANTIFYING CUMULATIVE STRESS EXPERIENCED BY MACROINVERTEBRATE ASSEMBLAGES IN LOWLAND STREAMS | 251 AB
QUANTIFYING CUMULATIVE STRESS EXPERIENCED BY MACROINVERTEBRATE ASSEMBLAGES IN LOWLAND STREAMS
Macroinvertebrates in lowland streams experience multiple stress from the urban environment. Yet, quantifying how these multiple stressors impact macroinvertebrate assemblages is challenging. Therefore, we developed a novel method to quantify the cumulative stress experienced by macroinvertebrate assemblages in lowland streams. To this purpose, we considered 22 stressors from different stressor categories such as hydrological, morphological and chemical stressors, acting over multiple spatial scales ranging from instream to the catchment scale. Stressor intensity was categorized based on impact on macroinvertebrates. To validate the cumulative stress quantification method, the lowland stream Tungelroyse Beek in the Netherlands, located in urbanized region of the Netherlands, was used as a case study. It was shown that independently derived ecological quality scores based on macroinvertebrate samples decreased with increasing calculated cumulative stress scores, supporting the design of the method. Based on the contribution of each specific stressor to the cumulative stress scores, the reasons for the absence and presence of target macroinvertebrate species may be elucidated. Hence, the cumulative stress quantification method may help to identify and localize the most stringent stressors limiting target assemblages, and can thereby provide better focus of management resources.
- Watershed
- Water Quality
- Multi-stressors
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Presenters/Authors
Jip de Vries
(), University of Amsterdam, j.de.vries@uva.nl;
ASHA DISCLOSURE:
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Nonfinancial -