2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/22/2018 | 11:00 AM - 11:15 AM | HABITAT AND ECOLOGICAL RESPONSE OF STREAMS TO RECURRENT ATYPICAL SUMMER FLOODING IN GLACIER BAY, ALASKA. | 410 B
HABITAT AND ECOLOGICAL RESPONSE OF STREAMS TO RECURRENT ATYPICAL SUMMER FLOODING IN GLACIER BAY, ALASKA.
Flood regimes are a significant controlling variable in fluvial habitat and ecosystem structuring. Shifts in precipitation timing and intensity have driven increases in flood magnitude and frequency. However, the significance of such changes for habitat complexity and biotic communities is unclear, whilst the importance of flood timing in biotic recovery is unknown. Our understanding is further limited by the absence of long term analyses of system response (resistance and resilience). Here, we show the significant role recurrent, atypical, summer flooding played in altering habitat heterogeneity and biotic community composition, across a habitat complexity gradient. Additionally, we compare response to these recent floods (2014) and major winter floods (2005) within the context of a unique long term dataset (>30 years). Habitat and ecological response to the summer floods varied across the habitat complexity gradient. Less complex systems demonstrated high resistance of biotic communities although habitat complexity resilience was low. Contrastingly, complex systems resistance was low in spite of high resilience of habitat complexity. Macroinvertebrate communities were more similar across the habitat complexity gradient following flooding. Our findings provide an important foundation for understanding habitat and ecological implications of changing flood regimes.
- Flood
- Habitat
- Geomorphology
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Presenters/Authors
Lawrence Eagle
(), University of Leeds, UK, gyle@leeds.ac.uk;
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Megan Klaar
(), University of Leeds, UK, M.J.Klaar@leeds.ac.uk;
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Victoria Milner
(), University of Worcester, v.milner@worc.ac.uk;
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Lee Brown
(), University of Leeds, UK, l.brown@leeds.ac.uk;
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Jonathan Carrivick
(), University of Leeds, UK, j.l.carrivick@leeds.ac.uk;
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