A review of ecological restoration techniques in fluvial rivers

Pan, Baozhu; Yuan, Jianping; Zhang, Xinhua; Wang, Zhaoyin; Jiao, Chen; Lu, Jinyou; Yang, Wei; Li, Zhiwei; Zhao, Na; Xu, Mengzhen

doi:10.1016/j.ijsrc.2016.03.001

Cited by 82 publications

(41 citation statements)

References 73 publications

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“…A systematic approach to the management of a particular lake necessitates a comprehensive analysis of the nutrient load and an understanding of the lake and biota characteristics. Longterm intervention techniques which have been used to mitigate cyanobacterial blooms in lakes, reservoirs, and rivers include nutrient reduction, alteration of hydrophysical conditions, artificial mixing, shortening of retention times, and various treatments, e.g., with clay (Paerl et al 2016;Pan et al 2016;Stroom and Kardinaal 2016). In addition to long-term measures, there is sometimes a need to rapidly destruct a cyanobacterial mass occurrence which may threaten human or animal health.…”

Section: Use Of H 2 O 2 For Elimination Of Cyanobacteria and Mcsmentioning

confidence: 99%

Elimination of cyanobacteria and microcystins in irrigation water—effects of hydrogen peroxide treatment

Spoof

Jaakkola

Važić

et al. 2020

Environ Sci Pollut Res

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Cyanobacterial blooms pose a risk to wild and domestic animals as well as humans due to the toxins they may produce. Humans may be subjected to cyanobacterial toxins through many routes, e.g., by consuming contaminated drinking water, fish, and crop plants or through recreational activities. In earlier studies, cyanobacterial cells have been shown to accumulate on leafy plants after spray irrigation with cyanobacteria-containing water, and microcystin (MC) has been detected in the plant root system after irrigation with MC-containing water. This paper reports a series of experiments where lysis of cyanobacteria in abstracted lake water was induced by the use of hydrogen peroxide and the fate of released MCs was followed. The hydrogen peroxide-treated water was then used for spray irrigation of cultivated spinach and possible toxin accumulation in the plants was monitored. The water abstracted from Lake Köyliönjärvi, SW Finland, contained fairly low concentrations of intracellular MC prior to the hydrogen peroxide treatment (0.04 μg L −1 in July to 2.4 μg L −1 in September 2014). Hydrogen peroxide at sufficient doses was able to lyse cyanobacteria efficiently but released MCs were still present even after the application of the highest hydrogen peroxide dose of 20 mg L −1. No traces of MC were detected in the spinach leaves. The viability of moving phytoplankton and zooplankton was also monitored after the application of hydrogen peroxide. Hydrogen peroxide at 10 mg L −1 or higher had a detrimental effect on the moving phytoplankton and zooplankton.

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Section: Use Of H 2 O 2 For Elimination Of Cyanobacteria and Mcsmentioning

confidence: 99%

Elimination of cyanobacteria and microcystins in irrigation water—effects of hydrogen peroxide treatment

Spoof

Jaakkola

Važić

et al. 2020

Environ Sci Pollut Res

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“…River pollution could produce unintentional irreversible damage to the resident biota and reduce the resource values of the rivers (Pan et al, 2016). Kelani River, which is one of the largest water sheds in Sri Lanka, is increasingly being polluted due to urban, agricultural and industrial activities.…”

Section: Introductionmentioning

confidence: 99%

Use of liver histological alterations and erythrocytic nuclear abnormalities of two native fish in Kelani River, Sri Lanka as biomarkers for pollution impact assessments

Ruvinda

Pathiratne

2020

J. Natn. Sci. Foundation Sri Lanka

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Multi-biomarker approach is recognised as a complementary tool for environmental monitoring studies to better appraise how pollutants affect ecosystems. This study examined histological alterations in the liver tissues and nuclear abnormalities in the peripheral erythrocytes of two native fish species inhabiting the Kelani River (Etroplus suratensis and Dawkinsia singhala) as 'effect biomarkers' for assessing pollution impacts. Surface water and native fish were sampled from two polluted sites in the lower reach (Kaduwela and Mattakkuliya) and a less polluted site in the upper reach (Ruwanwella) of the river covering rainy and dry periods. Physico-chemical analyses of surface water confirmed an increasing trend of pollution towards the lower reach of the river. Significantly greater liver histopathologic condition indices and erythrocytic nuclear abnormality frequencies (p < 0.05) were found in the fish inhabiting lower reaches of the river compared to those in the upper catchment at Ruwanwella. Biomarker responses revealed that the fish populations inhabiting the polluted sites in the river are under stress especially due to hepatic damage and genotoxicity. The results suggest that endemic and nationally threatened fish species in the riverine ecosystem may be at risk due to the contaminant stress under long term exposure. This study supports utility of erythrocyte nuclear abnormality and liver histopathological biomarker responses of native fish as cost effective tools for the identification of potential biological hazards of river pollution.

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“…The scenarios of generalized habitat fragmentation urge mitigation. A review on the ecological restoration of fluvial rivers has recently been published [23], which comprises techniques for rivers affected by engineering control. In general, the ecological restoration of rivers affected by the construction of hydraulic facilities mainly includes two aspects: Restoration of the river's geomorphological features, and the natural hydrological regime.…”

Section: Introductionmentioning

confidence: 99%

Undamming the Douro River Catchment: A Stepwise Approach for Prioritizing Dam Removal

Cortes

Peredo

Terêncio

et al. 2019

Water

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Dams provide water supply, flood protection, and hydropower generation benefits, but also harm native species by altering the natural flow regime, and degrading the aquatic and riparian habitats. In the present study, which comprised the Douro River basin located in the North of Portugal, the cost-benefit assessment of dams was based upon a balance between the touristic benefits of a dammed Douro, and the ecological benefits of less fragmented Douro sub-catchments. Focused on four sub-catchments (Sabor, Tâmega, Côa and Corgo), a probabilistic stream connectivity model was developed and implemented to recommend priorities for dam removal, where this action could significantly improve the movement of potadromous fish species along the local streams. The proposed model accounts for fish movement across the dam or weir (permeability), which is a novel issue in connectivity models. However, before any final recommendation on the fate of a dam or weir, the connectivity results will be balanced with other important socio-economic interests. While implementing the connectivity model, an inventory of barriers (dams and weirs) was accomplished through an observation of satellite images. Besides identification and location of any obstacles, the inventory comprised the compilation of data on surrounding land use, reservoir water use, characteristics of the riparian gallery, and permeability conditions for fish, among others. All this information was stored in a geospatial dataset that also included geographical information on the sub-catchment drainage network. The linear (drainage network) and point (barriers) source data were processed in a computer program that provided or returned numbers for inter-barrier stream lengths (habitat), and the barrier permeability. These numbers were finally used in the same computer program to calculate a habitat connector index, and a link improvement index, used to prioritize dam removal based upon structural connectivity criteria. The results showed that habitat patch connectivity in the Sabor, Tâmega and Côa sub-catchments is not dramatically affected by the installed obstacles, because most link improvement values were generally low. For the opposite reason, in the Corgo sub-catchment, obstacles may constitute a relatively higher limitation to connectivity, and in this case the removal of eight obstacles could significantly improve this connectivity. Using the probabilistic model of structural connectivity, it was possible to elaborate a preliminary selection of dams/weirs that critically limit stream connectivity, and that will be the focus of field hydraulic characterization to precisely determine fish movement along the associated river stretches. Future work will also include the implementation of a multi-criteria decision support system for dam removal or mitigation of the critical structures, as well to define exclusion areas for additional obstacles.

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A review of ecological restoration techniques in fluvial rivers

Cited by 82 publications

References 73 publications

Elimination of cyanobacteria and microcystins in irrigation water—effects of hydrogen peroxide treatment

Elimination of cyanobacteria and microcystins in irrigation water—effects of hydrogen peroxide treatment

Use of liver histological alterations and erythrocytic nuclear abnormalities of two native fish in Kelani River, Sri Lanka as biomarkers for pollution impact assessments

Undamming the Douro River Catchment: A Stepwise Approach for Prioritizing Dam Removal

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