The Experts below are selected from a list of 24084 Experts worldwide ranked by ideXlab platform
Michael G. Kaufman - One of the best experts on this subject based on the ideXlab platform.
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the effect of an industrial effluent on an urban stream benthic community water quality vs habitat quality
Environmental Pollution, 2003Co-Authors: Ethan J Nedeau, Richard W Merritt, Michael G. KaufmanAbstract:Abstract We studied the effect of an industrial effluent on the water quality, habitat quality, and benthic Macroinvertebrates of an urban stream in southwestern Michigan (USA). The effluent affected water quality by raising in-stream temperatures 13–18 °C during colder months and carrying high amounts of iron (>20×higher than ambient) that covered the streambed. The effluent also affected habitat conditions by increasing total stream discharge by 50–150%, causing a significant change in substrate and flow conditions. We used three methods to collect benthic Macroinvertebrates in depositional and erosional habitats and to understand the relative importance of habitat quality and water quality alterations. Macroinvertebrate response variables included taxonomic richness, abundance, and proportional abundance of sensitive taxonomic groups. Results indicated that the effluent had a positive effect on Macroinvertebrate communities by increasing the quantity of riffle habitat, but a negative effect on Macroinvertebrate communities by reducing water quality. Results illustrated the need for careful consideration of habitat quality and water quality in restoration or remediation programs.
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the effect of an industrial effluent on an urban stream benthic community water quality vs habitat quality
Environmental Pollution, 2003Co-Authors: Ethan J Nedeau, Richard W Merritt, Michael G. KaufmanAbstract:We studied the effect of an industrial effluent on the water quality, habitat quality, and benthic Macroinvertebrates of an urban stream in southwestern Michigan (USA). The effluent affected water quality by raising in-stream temperatures 13-18 degree C during colder months and carrying high amounts of iron (> 20 x higher than ambient) that covered the streambed. The effluent also affected habitat conditions by increasing total stream discharge by 50-150%, causing a significant change in substrate and flow conditions. We used three methods to collect benthic Macroinvertebrates in depositional and erosional habitats and to understand the relative importance of habitat quality and water quality alterations. Macroinvertebrate response variables included taxonomic richness, abundance, and proportional abundance of sensitive taxonomic groups. Results indicated that the effluent had a positive effect on Macroinvertebrate communities by increasing the quantity of riffle habitat, but a negative effect on Macroinvertebrate communities by reducing water quality. Results illustrated the need for careful consideration of habitat quality and water quality in restoration or remediation programs.
Ethan J Nedeau - One of the best experts on this subject based on the ideXlab platform.
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the effect of an industrial effluent on an urban stream benthic community water quality vs habitat quality
Environmental Pollution, 2003Co-Authors: Ethan J Nedeau, Richard W Merritt, Michael G. KaufmanAbstract:Abstract We studied the effect of an industrial effluent on the water quality, habitat quality, and benthic Macroinvertebrates of an urban stream in southwestern Michigan (USA). The effluent affected water quality by raising in-stream temperatures 13–18 °C during colder months and carrying high amounts of iron (>20×higher than ambient) that covered the streambed. The effluent also affected habitat conditions by increasing total stream discharge by 50–150%, causing a significant change in substrate and flow conditions. We used three methods to collect benthic Macroinvertebrates in depositional and erosional habitats and to understand the relative importance of habitat quality and water quality alterations. Macroinvertebrate response variables included taxonomic richness, abundance, and proportional abundance of sensitive taxonomic groups. Results indicated that the effluent had a positive effect on Macroinvertebrate communities by increasing the quantity of riffle habitat, but a negative effect on Macroinvertebrate communities by reducing water quality. Results illustrated the need for careful consideration of habitat quality and water quality in restoration or remediation programs.
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the effect of an industrial effluent on an urban stream benthic community water quality vs habitat quality
Environmental Pollution, 2003Co-Authors: Ethan J Nedeau, Richard W Merritt, Michael G. KaufmanAbstract:We studied the effect of an industrial effluent on the water quality, habitat quality, and benthic Macroinvertebrates of an urban stream in southwestern Michigan (USA). The effluent affected water quality by raising in-stream temperatures 13-18 degree C during colder months and carrying high amounts of iron (> 20 x higher than ambient) that covered the streambed. The effluent also affected habitat conditions by increasing total stream discharge by 50-150%, causing a significant change in substrate and flow conditions. We used three methods to collect benthic Macroinvertebrates in depositional and erosional habitats and to understand the relative importance of habitat quality and water quality alterations. Macroinvertebrate response variables included taxonomic richness, abundance, and proportional abundance of sensitive taxonomic groups. Results indicated that the effluent had a positive effect on Macroinvertebrate communities by increasing the quantity of riffle habitat, but a negative effect on Macroinvertebrate communities by reducing water quality. Results illustrated the need for careful consideration of habitat quality and water quality in restoration or remediation programs.
P F M Verdonschot - One of the best experts on this subject based on the ideXlab platform.
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the role of benthic microhabitats in determining the effects of hydromorphological river restoration on Macroinvertebrates
Hydrobiologia, 2016Co-Authors: R C M Verdonschot, Jochem Kail, Brendan G Mckie, P F M VerdonschotAbstract:Despite the large number of river restoration projects carried out worldwide, evidence for strong and long-term positive ecological effects of hydromorphological restoration on Macroinvertebrates is scarce. To improve the understanding of the success and failure of restoration measures, a standardized field study was carried out in nineteen paired restored and degraded river sections in mid-sized lowland and mountain rivers throughout Europe. We investigated if there were effects of restoration on Macroinvertebrate biodiversity, and if these effects could be related to changes in microhabitat composition, diversity and patchiness. Effects were quantified for all taxa combined, as well as Ephemeroptera, Plecoptera and Trichoptera separately. Additionally, species trait classifications of microhabitat preference types were used as a functional indicator. Restoration had no overall positive effects on the selected Macroinvertebrate metrics. Rather, we did find positive relationships between the Macroinvertebrate responses and the effect of restoration on the diversity and patchiness of microhabitats. Furthermore, the effects on Macroinvertebrates could be related to changes in the cover of specific substrate types in the restored sections. We conclude that the limited effect of restoration on Macroinvertebrate diversity overall reflected, at least in part, the limited effect of most restoration measures on microhabitat composition and diversity.
Yaoyang Xu - One of the best experts on this subject based on the ideXlab platform.
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effect of hydrological regime on the Macroinvertebrate community in three gorges reservoir china
Quaternary International, 2010Co-Authors: Meiling Shao, Yaoyang XuAbstract:Dam construction resulting from river closure always leads to dramatic changes of the hydrological conditions and influences the aquatic ecosystems seriously. The response of the Macroinvertebrate community during the 5 years (2 impoundment stages) after the impoundment of Three-Gorges Reservoir (TGR) was analyzed to illustrate the difference of the Macroinvertebrate communities between the two stages after impoundment, indicating the hydrological effects on the aquatic ecosystem. The results showed that the total density of Macroinvertebrates increased significantly, and displayed obvious seasonal patterns, after more than one year's ecosystem rebuilding. Density after the second impoundment did not show a significant difference compared to that of the two years before the second impoundment. The maximum value appeared in spring, with naididae dominating the community (relative abundance over 90%). Shannon-Wiener diversity index also displayed obvious seasonal fluctuations with the maximum value in winter and minimum in autumn. The NMS ordination to the Macroinvertebrate community indicated the seasonal patterns have become relatively stable from 2005 in the first stage, except the autumn. After the second impoundment, the seasonal patterns became more stable, and even the Macroinvertebrates in the autumn, when the impoundment plan was carried out, were also similar. The correlation analysis between the hydrological factors and the Macroinvertebrate parameters showed that the effect of the hydrological regime began to be significant from 2005. The inflow discharge caused positive effects on tubificidae, but negative ones on naididae. Relatively high transparency was more beneficial to the survival of the naididae. Additionally, the water residence time appeared significant influence to the Shannon-Wiener diversity. (C) 2010 Elsevier Ltd and INQUA. All rights reserved.
Stephen James Ormerod - One of the best experts on this subject based on the ideXlab platform.
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Stable isotopes as indicators of wastewater effects on the Macroinvertebrates of urban rivers
Hydrobiologia, 2013Co-Authors: Christy A. Morrissey, Alyosha Boldt, Alyson Mapstone, Jason Newton, Stephen James OrmerodAbstract:Rivers in urban locations frequently receive contaminated wastewater and particulate waste either directly from storm overflows or from sewage treatment facilities. Although many urban streams are now recovering from wide-scale historic pollution, lower-level effects on water chemistry, nutrients and biotic composition are still widespread. We aimed to determine whether such effects could be detected using stable isotope ratios (δ15N, δ13C and δ34S) in Macroinvertebrates alone or in conjunction with traditional biomonitoring. Macroinvertebrates were collected upstream and downstream of 11 different secondary wastewater treatment works (WwTW) in South Wales and the Welsh borders (United Kingdom). Overall, mean invertebrate δ15N signatures downstream of the WwTW were significantly enriched despite variation amongst sites. Moreover, changes between upstream and downstream Macroinvertebrate δ15N values were highly correlated with patterns in Macroinvertebrate community composition, increased total Macroinvertebrate abundance, and reduced Shannon Diversity and other biomonitoring indices (% EPT, % shredders and ASPT scores). Changes in invertebrate δ15N values also paralleled the consented discharge volumes and population equivalents from each WwTW. In contrast, isotopic ratios of δ13C and δ34S were unable to distinguish or quantify wastewater input into the rivers but differences were apparent amongst study streams. Overall, these results suggest that Macroinvertebrate δ15N signatures can detect and quantify the effects of secondary sewage treatment inputs to riverine ecosystems. Moreover, the method potentially provides a sensitive means for tracing sewage-derived nutrients into food webs while inferring effects on aquatic communities where sewage-loads are subtle or confounded by other stressors.
