Analysis and restoration of an ecological flow regime during the Coreius guichenoti spawning period

Zhang, Peng; Li, Kefeng; Wu, Yu-Lei; Li, Qingyuan; Zhao, Pengxiao; Li, Yong

doi:10.1016/j.ecoleng.2018.08.009

Cited by 31 publications

(10 citation statements)

References 35 publications

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“…Flow rate and thermal regimes in rivers are the key factors influencing fish spawning and are substantially altered by reservoir operations. Previous studies have focused on the relationships between fish spawning and flow velocity as well as water temperature [ 3 , 66 , 67 , 68 ]; however, the effects of water temperature alterations during the DFO have not been well investigated. DFO plays a decisive role in fish reproduction [ 14 ], and most temperate fish undergo ovary development in the winter, ovary maturation in the spring, and spawning in the summer.…”

Section: Discussionmentioning

confidence: 99%

Transcriptomic Analysis on the Effects of Altered Water Temperature Regime on the Fish Ovarian Development of Coreius guichenoti under the Impact of River Damming

Chen

Zhang

et al. 2022

Biology

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Field investigation indicated that the reduction in fish spawning was associated with the alteration in water temperatures, even a 2–3 °C monthly difference due to reservoir operations. However, the physiological mechanism that influences the development of fish ovary (DFO) remains unclear. Thus, experiments of Coreius guichenoti were conducted at three different temperatures, optimal temperature (~20 °C, N) for fish spawning, lower (~17 °C, L), and higher (~23 °C, H), to reveal the effects of altered water temperature on the DFO. Comparisons were made between the L and N (LvsN) conditions and H and N (HvsN) conditions. Transcriptomic analysis differentially expressed transcripts (DETs) related to heat stress were observed only in LvsN conditions, indicating that the DFO showed a stronger response to changes in LvsN than in HvsN conditions. Upregulation of DETs of vitellogenin receptors in N temperature showed that normal temperature was conducive to vitellogenin entry into the oocytes. Other temperature-sensitive DETs, including microtubule, kinesin, dynein, and actin, were closely associated with cell division and material transport. LvsN significantly impacted cell division and nutrient accumulation in the yolk, whereas HvsN only influenced cell division. Our results highlight the impact of altered water temperature on the DFO, thereby providing insights for future reservoir operations regarding river damming and climate change and establishing fish conservation measures.

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Section: Discussionmentioning

confidence: 99%

Transcriptomic Analysis on the Effects of Altered Water Temperature Regime on the Fish Ovarian Development of Coreius guichenoti under the Impact of River Damming

Chen

Zhang

et al. 2022

Biology

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“…Four variables (water depth, flow velocity, water temperature, and dissolved oxygen concentration) were selected to assess the physical habitat of P. pekinensis . These variables, with strong influences on fish survival, growth, and fitness, were the determinants of energetics and metabolism of stream fishes (He & Marcinkevage, ; Zhang et al, ; Zhao et al, ). In the study area, the concentration of dissolved oxygen in the mainstream of the HR was in the suitable range for P. pekinensis , which was from 6 to 12 mg L −1 (Chen et al, ).…”

Section: Discussionmentioning

confidence: 99%

Incorporating fish habitat requirements of the complete life cycle into ecological flow regime estimation of rivers

et al. 2020

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Maintenance of ecological flow regime for aquatic biota is essential to river ecosystem health. To estimate ecological flow, habitat simulation methods have been widely applied because of their combination of hydrological regime and species hydraulic preference. However, few methods are available to provide a flow regime that varies over time due to time-specific habitat requirements from different target species or from one target species at its different life stages. This paper described a novel approach for evaluating the ecological flow regime that was a time series of discharge considering different life stages of target species. First, an ecohydraulic model that combined multivariable habitat suitability curve of target species with a hydraulic module was developed to establish the relationship between habitat status and hydrological conditions. Then, the habitat connectivity index was adopted to assess the spatial patterns of habitat patches. Finally, the ecological flow regime considering the complete life cycle of target species was derived. The developed approach was applied to the middle reach of Huaihe River, where the flow is highly regulated by dams and sluices. The Chinese bream (Parabramis pekinensis) was chosen as the target species for ecological flow calculation. The ecological flow regime in the Lutaizi was provided for the river management. The study provided a promising method to support ecological friendly operations of hydraulic structures for river ecosystem restoration and management. K E Y W O R D S ecohydraulic model, ecological flow regime, full life cycle, habitat connectivity

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“…At present, the ecological flow calculation includes four methods, as shown in Table 1: hydrological methods, hydraulic methods, habitat simulation methods, and holistic methods [15]. Among them, hydrological methods are based on a long series of historical run-off data, and take a fixed flow percentage as the required flow process of the river; these are generally used for reference or method comparison, including the Tennant method [16][17][18], Texas method [19,20], flow duration curve (FDC) method [21,22], range of variability approach (RVA) [23][24][25], minimum average 7 day (consecutive) flow expected to occur once every 10 years (7Q10) method [26,27], annual distribution method [28,29], monthly frequency calculation method [30,31], monthly guarantee rate method [32,33], minimum monthly average flow method [34,35], and the Northern Great Plains Resources Program (NGPRP) method [36,37]. The hydrological methods are simple and convenient, and do not require on-site monitoring, but the accuracy is low, due to single factor.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Simulation of Ecological Flow Based on the Variable Interval Analysis Method

Wei

Xie

Lu³

et al. 2022

Sustainability

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Ecological flow is an important basis for maintaining the structure and function of river ecosystems, and ensuring the sustainable development of economies and societies in river basins. In order to solve the problems of unclear concepts of ecological flow, difficulty in adapting to dynamic changes in demands, and the hydrological conditions and poor operability of calculated results of a practical application, a variable interval analysis method (VIAM) was proposed to calculate the ecological flow. The method comprehensively considered a variety of variable factors, such as spatial–temporal scale changes, hydrological condition changes, ecological service object changes, and calculation method changes. On the basis of a relatively fixed ecological base flow, a variable lifting amount was added to determine the ecological flow, and the ecological flow was a variable interval. Taking the Wei River as an example, the VIAM was validated and applied. With the support of a knowledge visualization integrated platform, the ecological flow simulation system of the Wei River was constructed. The results show that: (1) the VIAM makes the ecological flow calculation more scientific and reasonable, and the ecological flow of the Wei River from the upper reaches to the lower reaches increases gradually under the influence of water inflow, sewage discharge, and erosion and deposition of sediment, and the annual total water demand of the upper limit of ecological flow in a dry year is 1.04 billion m3, 1.63 billion m3, 2.29 billion m3, 4.09 billion m3, and 4.66 billion m3; (2) the variable interval is used to describe the ecological flow, which has strong applicability and operability; (3) the simulation system can quickly adapt to the demand changes in practical application, and provide visual decision support for managers. The VIAM provides new ideas and references for comprehensively promoting the control of the ecological flow.

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Analysis and restoration of an ecological flow regime during the Coreius guichenoti spawning period

Cited by 31 publications

References 35 publications

Transcriptomic Analysis on the Effects of Altered Water Temperature Regime on the Fish Ovarian Development of Coreius guichenoti under the Impact of River Damming

Transcriptomic Analysis on the Effects of Altered Water Temperature Regime on the Fish Ovarian Development of Coreius guichenoti under the Impact of River Damming

Incorporating fish habitat requirements of the complete life cycle into ecological flow regime estimation of rivers

Dynamic Simulation of Ecological Flow Based on the Variable Interval Analysis Method

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