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Open AccessArticle

Effect of Hyporheic Exchange on Macroinvertebrate Community in the Weihe River Basin, China

1
Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Sciences, Northwest University, Xi’an 710127, China
2
Institute of Qinling Mountains, Northwest University, Xi’an 710127, China
3
State Key Laboratory of Soil Erosion and Dryland Framing on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences, Yangling 712100, China
4
Department of Civil, Architectural and Environmental Engineering (DICEA), University of Napoli “Federico II”, Napoli 80125, Italy
*
Author to whom correspondence should be addressed.
Water 2020, 12(2), 457; https://doi.org/10.3390/w12020457
Received: 30 December 2019 / Revised: 16 January 2020 / Accepted: 6 February 2020 / Published: 8 February 2020
(This article belongs to the Special Issue Advances in Environmental Hydraulics)
The effect of hyporheic exchange on macroinvertebrates is a significant topic in ecohydraulics. A field study was conducted during May and June 2017 to investigate the impacts of magnitude and patterns of hyporheic exchange on the sediment macroinvertebrate community in the Weihe River basin. The results demonstrate that upwelling flows cause resuspension of riverbed sediment, increasing the proportion of swimmer groups (such as Baetidae) in the macroinvertebrate community. However, large resuspension of river bed sediment results in a reduced abundance of macroinvertebrates. By controlling the transport processes of dissolved oxygen (DO), dissolved organic carbon (DOC), nutrients, temperature, and different patterns of hyporheic exchange strongly influence the structure of macroinvertebrate communities. Downwelling is more likely to produce rich invertebrate communities than upwelling. The magnitude for the hyporheic flux of 150–200 mm/d was optimal for the macroinvertebrate community in the Weihe River Basin. Above or below this rate results in a decline in community abundance and diversity. We suggest that research is conducted to better understand the effects of hyporheic exchange across bedforms on macroinvertebrate communities. The study supports any activities to preserve the ecological functions and health of rivers dominated by fine-grained sediments. View Full-Text
Keywords: Ecohydraulics; hyporheic exchange; macroinvertebrate community; resuspension Ecohydraulics; hyporheic exchange; macroinvertebrate community; resuspension
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Lin, Q.; Song, J.; Gualtieri, C.; Cheng, D.; Su, P.; Wang, X.; Fu, J.; Peng, J. Effect of Hyporheic Exchange on Macroinvertebrate Community in the Weihe River Basin, China. Water 2020, 12, 457.

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