Periphyton and ecosystem metabolism as indicators of river ecosystem response to environmental flow restoration in a flow-reduced river

Huang, Wei; Liu, Xiaobo; Peng, Wenqi; Wu, Leixiang; Yano, Shinichiro; Zhang, Jianmin; Fang, Zhao

doi:10.1016/j.ecolind.2017.11.025

Cited by 25 publications

(17 citation statements)

References 53 publications

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“…The values found are similar to those observed for some types of algae, the most abundant species of the periphyton [1]. According to Huang et al [17] less than 25% of the periphyton consists of other organisms.…”

Section: Production and Characterization Of Periphytic Biomasssupporting

confidence: 88%

Periphytic biomass composition and exploitation from algae turf scrubber system

et al. 2019

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The algae turf scrubber (ATS) is an excellent system for nutrient removal in wastewater or water bodies. The purpose of this study was to evaluate the production of periphytic biomass in an ATS system installed in a freshwater reservoir and to recognize biomass composition. Mid-infrared spectroscopic analysis was carried out to identify the main composition and variability of biomass using multivariate analysis. The composition was studied for potentiality to use the periphytic biomass for the industry. As a result, the system produced a dry weight of 4.46 g m −2 day −1 of periphytic biomass. It was determined that the biomass contained 43.71% carbon, 6.03% nitrogen, and 2.87% phosphorus. Protein, lipid, and carbohydrate contents were 19.27%, 5.90%, and 65.9%, respectively. Carbohydrate and protein values indicated that the periphytic biomass has a potential for biofuel, fertilizer, and animal feed, and other products; due to the carbohydrate content, application for fermentative products is relevant.

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Section: Production and Characterization Of Periphytic Biomasssupporting

confidence: 88%

Periphytic biomass composition and exploitation from algae turf scrubber system

et al. 2019

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“…In this way, biomass gains occur during periods of higher flow stability and are further enhanced in altered rivers as a result of the steady flows associated to damming or water abstraction, which promote the accumulation of algae and macrophytes (Biggs et al, 2005; Ponsatí et al, 2015; Riis et al, 2008; Smolar‐Žvanut & Krivograd Klemenčič, 2013; Smolar‐Žvanut & Mikoš, 2014). Consequently, recent studies suggested that periphyton and its associated metabolism could be used as indicators for monitoring the ecological effects of increasing minimum flows (Huang et al, 2018). Biomass loss processes, on the other hand, are caused by increased shear stress resulting in breakage and dislodgement of biofilm mats and plants, for example, because of high‐flow events (Franklin et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

The effect of altered flow regimes on aquatic primary producer communities: Diatoms and macrophytes

et al. 2021

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Rivers are intensively managed worldwide through unprecedented flow regime alterations on a global scale. This has led to an increasing interest in the development of quantitative tools to assess the ecological response of organisms to flow alteration. To date, studies reflect a large diversity of responses that make the intensity and prevalence of effects difficult to generalize. The present study analysed how flow alterations caused by dams affect the structure, composition and traits of diatoms and macrophytes in three Spanish river basins (Cantabric, Ebro and Duero). By using a control‐impact design based mainly in hydrological similarity, our results showed consistent patterns of change in diatom and macrophyte communities. Our study showed a shift from resistant traits such as non‐colonial diatom forms and crust‐forming algae, which are adapted to the extreme events and natural dynamism of unregulated rivers, towards planktonic diatoms, free‐floating algae and the mass development of aquatic plants in hydrological altered sites. Both communities shared common thresholds of response to altered hydrological attributes that could be considered in a flow management context. The hydrological indices that impacted diatom and macrophyte communities the most were related with the magnitude and duration of minimum flows. However, our results also show that it is important to consider the interrelationships between the different hydrological attributes such as the seasonal variability of monthly flows, the magnitude of maximum annual extremes, the timing of flow events, and the frequency and rate of flow changes.

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“…Values of ca. 140 were obtained in LC1 mature cultures at the highest light in Run3 and Run4, indicating a balance between the photo- and heterotrophic components [71,74]. Nevertheless, in LC1 cultures in Run3 and Run4 the heterotrophic component became, in terms of biomass, more important as biofilms grew.…”

Section: Resultsmentioning

confidence: 99%

Wastewater Biofilm Photosynthesis in Photobioreactors

2019

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Photosynthetic performance of algal-bacterial biofilms from an Italian wastewater treatment plant was studied in a flow-lane photobioreactor at different irradiances, temperatures, and flow regime to evaluate the effects of these environmental parameters on biofilms’ functioning, in view of application of these communities in wastewater biological treatment. Pulse amplitude modulated fluorescence was used to estimate the effective quantum yield of PSII (ΔF/Fm’) of the light-acclimated biofilms and to perform rapid light curves (RLCs) for the determination of the photosynthetic parameters (rel.ETRmax, α, Ik). Chl a, ash free dry weight (AFDW), and dry weight (DW) were measured to assess phototrophic and whole biofilm biomass development over time. From the analysis of photosynthetic parameter variation with light intensity, temperature and flow rate, it was possible to identify the set of experimental values favoring biofilm photosynthetic activity. Biomass increased over time, especially at the highest irradiances, where substrata were fastly colonized and mature biofilms developed at all temperatures and flow conditions tested.

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Periphyton and ecosystem metabolism as indicators of river ecosystem response to environmental flow restoration in a flow-reduced river

Cited by 25 publications

References 53 publications

Periphytic biomass composition and exploitation from algae turf scrubber system

Periphytic biomass composition and exploitation from algae turf scrubber system

The effect of altered flow regimes on aquatic primary producer communities: Diatoms and macrophytes

Wastewater Biofilm Photosynthesis in Photobioreactors

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