Invertebrate and Microbial Response to Hyporheic Restoration of an Urban Stream
| Autor: | Giles W. Goetz, Katherine D. Lynch, Sarah A. Morley, Abigail H. Wells, Anne E. Baxter, Linda D. Rhodes |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Watershed
lcsh:Hydraulic engineering Urban stream 0208 environmental biotechnology Geography Planning and Development Stormwater 02 engineering and technology 010501 environmental sciences Aquatic Science 01 natural sciences Biochemistry stream restoration hyporheic zone lcsh:Water supply for domestic and industrial purposes lcsh:TC1-978 Hyporheic zone Floodplain restoration aquatic invertebrate green stormwater infrastructure 0105 earth and related environmental sciences Water Science and Technology Hydrology lcsh:TD201-500 020801 environmental engineering Pacific salmon microbe Urban ecology urban ecology Habitat biological monitoring Environmental science Stream restoration |
| Zdroj: | Water, Vol 13, Iss 481, p 481 (2021) Water Volume 13 Issue 4 |
| ISSN: | 2073-4441 |
| Popis: | All cities face complex challenges managing urban stormwater while also protecting urban water bodies. Green stormwater infrastructure and process-based restoration offer alternative strategies that prioritize watershed connectivity. We report on a new urban floodplain restoration technique being tested in the City of Seattle, USA: an engineered hyporheic zone. The hyporheic zone has long been an overlooked component in floodplain restoration. Yet this subsurface area offers enormous potential for stormwater amelioration and is a critical component of healthy streams. From 2014 to 2017, we measured hyporheic temperature, nutrients, and microbial and invertebrate communities at three paired stream reaches with and without hyporheic restoration. At two of the three pairs, water temperature was significantly lower at the restored reach, while dissolved organic carbon and microbial metabolism were higher. Hyporheic invertebrate density and taxa richness were significantly higher across all three restored reaches. These are some of the first quantified responses of hyporheic biological communities to restoration. Our results complement earlier reports of enhanced hydrologic and chemical functioning of the engineered hyporheic zone. Together, this research demonstrates that incorporation of hyporheic design elements in floodplain restoration can enhance temperature moderation, habitat diversity, contaminant filtration, and the biological health of urban streams. |
| Databáze: | OpenAIRE |
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