Effects of seasonal hydrological regulation of cascade dams on the functional diversity of zooplankton: Implications for the management of massive reservoirs and dams

Shen, Jiachen; Qin, Ge; Gu, Xu; Liu, Yan; An, Shuqing; Leng, Xin; Wan, Youchuan

doi:10.1016/j.jhydrol.2022.127825

Cited by 15 publications

(3 citation statements)

References 61 publications

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“…Many studies have shown that damming and hydropower projects in the upper reaches of the lake will lead to a substantial reduction (more than 80%) or even drying up in some river sections, and flow-reduced river reaches downstream will be formed [61,62]. As a result, the downstream hydrological conditions have undergone significant alterations, resulting in serious degradation of the structure and function of the river ecosystem [63,64]. The reduction of flow has a significant negative impact on the aquatic ecosystem and the microbial, plant, and animal-community structures in the flowreduced reaches.…”

Section: Quantitative Response Relationship Between P−ibi Index and Flowmentioning

confidence: 99%

Determining Critical Thresholds of Environmental Flow Restoration Based on Planktonic Index of Biotic Integrity (P−IBI): A Case Study in the Typical Tributaries of Poyang Lake

Wang

Huang

Zhu

et al. 2022

IJERPH

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Hydropower construction and climate change have aggravated river hydrological changes, which have reduced the water flow regime in the Ruhe River Basin. The reduced flow of the river seriously affected the water supply of nearby residents and the operation of the river ecosystem. Therefore, in order to alleviate the contradiction between water use for hydropower facilities and environmental water use, the urgent need is to explore the ecological flow-threshold of rivers. This study took the Fuhe River Basin as the research object, and summarized the monitoring data of eight hydrological stations from recent decades. Based on this, we explored the response law of P−IBI and flow, a tool to quickly measure the health of the ecosystem. Through the response relationship between alterations in environmental factors of the river and phytoplankton index of biotic integrity (P−IBI), it was determined that environmental flow was the dominant influencing factor of P−IBI. According to P−IBI, the threshold of environmental discharge in the Fuhe River was limited to 273~826.8 m3/s. This study established a regulatory framework for the river flow of large rivers by constructing P−IBI and determining the critical thresholds of environmental flow by constraining the constitution. These results provide a theoretical basis for better planning and improvement of river ecosystem restoration and river utilization.

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Section: Quantitative Response Relationship Between P−ibi Index and Flowmentioning

confidence: 99%

Determining Critical Thresholds of Environmental Flow Restoration Based on Planktonic Index of Biotic Integrity (P−IBI): A Case Study in the Typical Tributaries of Poyang Lake

Wang

Huang

Zhu

et al. 2022

IJERPH

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“…Changes in the structure of this community may alter ecosystem function (Deosti et al, 2021; Rizo et al, 2020). Studies have pointed out the effects of damming on these communities (Shen et al, 2022; Souza et al, 2019), such as reduced species richness and increased density of resistant species (Picapedra et al, 2020) and altered species distribution (Schmidt et al, 2020). However, there is a knowledge gap when comparing studies of biotic responses to dams between temperate and tropical regions.…”

Section: Introductionmentioning

confidence: 99%

Taxonomic and functional homogenisation of zooplankton after river damming in Central Brazil

Silva,

Colares,

Palheta

et al. 2023

Freshwater Biology

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Dams on large rivers alter hydrodynamics, reduce seasonal variability and environmental heterogeneity, and have significant effects on river ecology. They produce less diverse environments and alter the community composition. Knowledge about the effects of dams on functional aspects of zooplankton communities is scarce. Thus, our main goal was to investigate how the zooplankton community of the Tocantins River in central Brazil changed after the implementation of the Estreito hydroelectric power plant dam. We explored the relationships of taxonomic and functional beta diversity in the zooplankton community, with the seasonality, flooding river phases and limnological variables. To answer our goals, we collected water samples 1 year before plant construction and 5 months after dam enclosure. To investigate how the environment changed after river damming, we conducted a principal component analysis. We calculated taxonomic and functional beta diversity using the Jaccard pairwise dissimilarity index for presence–absence data. To identify which functional traits were associated with each river phase and season, we firstly calculated the community weighted mean (CWM) for each trait. Secondly, we partitioned beta diversity into turnover and nestedness components. To investigate patterns of taxonomic and functional beta diversity and its turnover and nestedness components, we additionally used a series of six linear mixed models. Our results indicated that the limnological characteristics of the river changed after damming. Taxonomic and functional turnover was higher during the pre‐inundation phase, and this phase also showed greater limnological heterogeneity in comparison to the post‐inundation phase. We observed a strong seasonal dynamic in taxonomic turnover, with high turnover during the dry season. However, these seasonal dynamics disappeared after river damming. We demonstrated that the patterns of taxonomic and functional beta diversities were influenced by limnological variables and seasonal dynamics, which resulted in reduced variability in both species composition and functional characteristics after the implementation of the reservoir. This study emphasises the importance of variations in annual flow regimes in lotic ecosystems. We also showed an association between environmental heterogeneity patterns the high taxonomic and functional diversity of zooplankton communities.

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“…Trait-based studies have covered various aquatic taxa, such as phytoplankton (Pálffy et al, 2013;Du et al, 2022), periphyton (Bichoff et al, 2018;Wang et al, 2022), zooplankton (Kuczyńska-Kippen et al, 2020;Shen et al, 2022), macroinvertebrates (Pallottini et al, 2017;Belmar et al, 2019), and fish (Brind'Amour et al, 2011;Toussaint et al, 2016). They have also examined diverse geographic regions, including North America (Boucek and Rehage, 2014;Sinclair et al, 2021), Europe (Belmar et al, 2019;Wu et al, 2019), Australia (Galego de Oliveira et al, 2019;Lam-Gordillo et al, 2020), and Asia (Matsuzaki et al, 2016;Wang et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Combining functional diversity of lotic fish communities with river health assessment based on multi-metric chemical pollution and biological integrity index models

Jargal

Mamun²,

Choi³

et al. 2022

Front. Environ. Sci.

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Trait-based functional studies are widely used to elucidate the relationships between ecological indicators and environmental parameters as well as to predict functional change in aquatic biota in response to various types of human disturbance. Clarifying how functional traits of aquatic organisms depend on environmental conditions can facilitate aquatic conservation and management, but determining the importance of these traits to ecological river health requires further investigation. As fish play a key role in the assessment of ecological conditions, we examined the relevance of the functional diversity of lotic fish to the river health assessment using multi-metric models of water pollution (mWPI) and fish-based biological integrity (mIBI). Twelve fish traits related to food acquisition, environmental stability, and mobility were used for the functional analyses. Chemical river health was highly sensitive to downstream organic matter and nutrient pollution according to mWPI. Based on the present gradient of chemical health and water chemical variables, we identified three water quality groups (G-I, G-II, and G-III). G-I, G-II, and G-III showed low, intermediate, and high levels of water quality degradation, respectively. Spatially significant differences among these groups were observed for both the taxonomic and functional structures of lotic fish as well as ecological river health based on mIBI. The dominance of sensitive species was high in G-I, whereas tolerant and exotic species contributed strongly to the species compositions of G-II and G-III. Functional richness and dispersal were significantly reduced in G-III, and their decreases correlated with ecological health and the loss of species that are insectivorous, rheophilic, and sensitive to water pollution. Regarding redundancy analyses, both the models of functional trait metrics (F = 8.06, p < 0.001) and mIBI metrics (F = 4.88, p < 0.01) indicated good performance in terms of the variation in water quality and chemical river health parameters. Overall, the functional trait-based diversity of lotic fish is significant to the assessment of ecological river health and reflects water chemical quality. This association arises because niche occupation in functional space by all species, along with their abundance distribution, is highly responsive to the loss of species with sensitive traits due to water pollution.

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Effects of seasonal hydrological regulation of cascade dams on the functional diversity of zooplankton: Implications for the management of massive reservoirs and dams

Cited by 15 publications

References 61 publications

Determining Critical Thresholds of Environmental Flow Restoration Based on Planktonic Index of Biotic Integrity (P−IBI): A Case Study in the Typical Tributaries of Poyang Lake

Determining Critical Thresholds of Environmental Flow Restoration Based on Planktonic Index of Biotic Integrity (P−IBI): A Case Study in the Typical Tributaries of Poyang Lake

Taxonomic and functional homogenisation of zooplankton after river damming in Central Brazil

Combining functional diversity of lotic fish communities with river health assessment based on multi-metric chemical pollution and biological integrity index models

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