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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.
Qidong Lin; Jinxi Song; Carlo Gualtieri; Dandong Cheng; Ping Su; Xinxin Wang; Jiaxu Fu; Jianglin Peng. Effect of Hyporheic Exchange on Macroinvertebrate Community in the Weihe River Basin, China. Water 2020, 12, 457 .
AMA StyleQidong Lin, Jinxi Song, Carlo Gualtieri, Dandong Cheng, Ping Su, Xinxin Wang, Jiaxu Fu, Jianglin Peng. Effect of Hyporheic Exchange on Macroinvertebrate Community in the Weihe River Basin, China. Water. 2020; 12 (2):457.
Chicago/Turabian StyleQidong Lin; Jinxi Song; Carlo Gualtieri; Dandong Cheng; Ping Su; Xinxin Wang; Jiaxu Fu; Jianglin Peng. 2020. "Effect of Hyporheic Exchange on Macroinvertebrate Community in the Weihe River Basin, China." Water 12, no. 2: 457.
The sediment pollution caused by different metals has attracted a great deal of attention because of the toxicity, persistence, and bio-accumulation. This study focuses on heavy metals in the hyporheic sediment of the Weihe River, China. Contamination levels of metals were examined by using “geo-accumulation index, enrichment factor, and contamination factor” while ecological risk of metals were determined by “potential ecological risk and risk index”. The pollutant accumulation of metals ranked as follows: “manganese (Mn) > chromium (Cr) > zinc (Zn) > copper (Cu) > nickel (Ni) > arsenic (As) > lead (Pb)”. The geo-accumulation index identified arsenic as class 1 (uncontaminated to moderate contamination), whereas Cu, Cr, Ni, Zn, Pb, and Mn were classified as class 0 (uncontaminated). According to the enrichment factor, arsenic originated through anthropogenic activities and Cr, Ni, Cu, Zn, and Pb were mainly controlled by natural sources. The contamination factor elucidated that sediments were moderately polluted by (As, Cr, Cu, Zn, Mn, and Pb), whereas Ni slightly contaminated the sediments of the Weihe River. All metals posed a low ecological risk in the study area. The risk index revealed that contribution of arsenic (53.43 %) was higher than half of the total risk.
Muhammad Irfan Ahamad; Jinxi Song; Haotian Sun; Xinxin Wang; Muhammad Sajid Mehmood; Muhammad Sajid; Ping Su; Asif Jamal Khan. Contamination Level, Ecological Risk, and Source Identification of Heavy Metals in the Hyporheic Zone of the Weihe River, China. International Journal of Environmental Research and Public Health 2020, 17, 1070 .
AMA StyleMuhammad Irfan Ahamad, Jinxi Song, Haotian Sun, Xinxin Wang, Muhammad Sajid Mehmood, Muhammad Sajid, Ping Su, Asif Jamal Khan. Contamination Level, Ecological Risk, and Source Identification of Heavy Metals in the Hyporheic Zone of the Weihe River, China. International Journal of Environmental Research and Public Health. 2020; 17 (3):1070.
Chicago/Turabian StyleMuhammad Irfan Ahamad; Jinxi Song; Haotian Sun; Xinxin Wang; Muhammad Sajid Mehmood; Muhammad Sajid; Ping Su; Asif Jamal Khan. 2020. "Contamination Level, Ecological Risk, and Source Identification of Heavy Metals in the Hyporheic Zone of the Weihe River, China." International Journal of Environmental Research and Public Health 17, no. 3: 1070.
In order to evaluate the distribution of heavy metals and macroinvertebrates and to clarify the coupling relationship between them, a total of 54 samples of the 0-10 cm layer and 10-20 cm layer sediments were collected from 27 sites in the Weihe River Basin. Geo-accumulation index, Ecological potential risk index, Pollution load index, and Consensus-based sediment quality guidelines were employed to evaluate the ecological risk associated with heavy metals in sediments. Macroinvertebrate community structure was analyzed, following which the quality surrounding habitat was evaluated basing on the indexes. Our results confirmed that the orders of pollution level were 10-20 cm > 0-10 cm at different layers and Cd > Ni > Pb > Cu > Cr > Zn for different metals. Through correlation analysis and redundancy analysis, macroinvertebrate metrics exhibited significant correlations with heavy metals. Gastropods and R (Ratio of Ephemeroptera and Trichoptera index to Chironomidae) were selected as bioindicators in overall qualitative analysis. In the 0-10 cm layer, Gastropods and Family biotic index could be selected as bioindicators. Whereas, in the 10-20 cm layer, suitable bioindicators were Oligochaetes and DM (Maralef richness index). Heavy metals, especially Cd, in sediments may pose adverse impact on macroinvertebrate community.
Xinxin Wang; Ping Su; Qidong Lin; Jinxi Song; Haotian Sun; Dandong Cheng; Shaoqing Wang; Jianglin Peng; Jiaxu Fu. Distribution, assessment and coupling relationship of heavy metals and macroinvertebrates in sediments of the Weihe River Basin. Sustainable Cities and Society 2019, 50, 101665 .
AMA StyleXinxin Wang, Ping Su, Qidong Lin, Jinxi Song, Haotian Sun, Dandong Cheng, Shaoqing Wang, Jianglin Peng, Jiaxu Fu. Distribution, assessment and coupling relationship of heavy metals and macroinvertebrates in sediments of the Weihe River Basin. Sustainable Cities and Society. 2019; 50 ():101665.
Chicago/Turabian StyleXinxin Wang; Ping Su; Qidong Lin; Jinxi Song; Haotian Sun; Dandong Cheng; Shaoqing Wang; Jianglin Peng; Jiaxu Fu. 2019. "Distribution, assessment and coupling relationship of heavy metals and macroinvertebrates in sediments of the Weihe River Basin." Sustainable Cities and Society 50, no. : 101665.