Responses of fish assemblage structure to large-scale weir construction in riverine ecosystems

Joo, Gea‐Jae; Ventura, Marc; Buchaca, Teresa; Gim, Jeong-Soo; Yoon, Ju-Duk; Kim, Dong Hwan

doi:10.1016/j.scitotenv.2018.11.446

Cited by 29 publications

(27 citation statements)

References 49 publications

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“…The construction of dams and weirs to store or divert water for human use has altered the condition of aquatic ecosystems worldwide (Dudgeon et al ., ; Jo et al ., ; Olden, ; Vörösmarty et al ., ). Major alterations include reduced flow variability, conversion of lotic to lentic habitats, reduced habitat complexity and altered water quality (Bunn & Arthington, ).…”

Section: Introductionmentioning

confidence: 99%

Habitat use, movement and activity of two large‐bodied native riverine fishes in a regulated lowland weir pool

Koster

Dawson

Kitchingman

et al. 2020

Journal of Fish Biology

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The construction of dams and weirs, and associated changes to hydrological and hydraulic (e.g., water level and velocity) characteristics of rivers is a key environmental threat for fish. These multiple stressors potentially can affect fish in a variety of ways, including by causing changes in their movement, habitat use and activity. Understanding how and why these changes occur can inform management efforts to ameliorate these threats. In this context, we used acoustic telemetry to examine habitat use, longitudinal movement and activity of two lowland river fishes, Murray cod Maccullochella peelii and golden perch Macquaria ambigua, in a weir pool environment in south‐eastern Australia. We compared our results to published studies on riverine populations to determine if their behaviours are similar (or not). We show that M. peelii and M. ambigua in a weir pool exhibited some similar behaviours to conspecific riverine populations, such as strong site fidelity and use of woody habitat for M. ambigua. However, some behaviours, such as large‐scale (tens–hundreds of kilometres) movements documented for riverine populations, were rarely observed. These differences potentially reflect flow regulation (e.g., stable water levels, loss of hydraulic cues) in the weir pool. The two species also exhibited contrasting responses to dissolved oxygen conditions in the weir pool, which may reflect differences in their life history. Overall, this study shows that although some aspects of these two native fishes' life history can continue despite flow regulation, other aspects may change in weir pools, potentially impacting on long‐term population persistence.

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Section: Introductionmentioning

confidence: 99%

Habitat use, movement and activity of two large‐bodied native riverine fishes in a regulated lowland weir pool

Koster

Dawson

Kitchingman

et al. 2020

Journal of Fish Biology

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“…The land-use change also marks a prominent role in causing freshwater pollution as construction and installation of barrages or embankments to retain the flowing water can provide several services at the same time cause considerable changes in the physical, chemical and biological characteristics of the river (Sharma and Dutta 2020 ), turning them into eco-hydrological deficit state (Pal and Sarda 2020 ). Fragmentation of the riverine ecosystem because of artificial obstruction like barrages or dams affects the aquatic environment characteristics, as well as the fish species composition (Jo et al 2019 ). The effect of degraded quality can be seen in the form of deformities in the aquatic dwellers, with fish in particular (Bhagat and Kumar 2014; Dutta and Sheikh 2017 ).…”

Section: Resultsmentioning

confidence: 99%

Impact assessment on water quality in the polluted stretch using a cluster analysis during pre- and COVID-19 lockdown of Tawi river basin, Jammu, North India: an environment resiliency

Kour

Kothari

Dhar

et al. 2021

Energ. Ecol. Environ.

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Pollution-free rivers give indication of a healthy ecosystem. The stretch of Tawi river particularly in the Jammu city is experiencing pollution load and the quality is degraded. The present study highlights the impact of COVID-19 lockdown on the water quality of Tawi river in Jammu, J&K Union Territory. Water quality data based upon the real-time water monitoring for four locations (Below Tawi Bridge, Bhagwati Nagar, Belicharana and Surajpur) have been obtained from the web link of Jammu and Kashmir Pollution Control Board. The important parameters used in the present study include pH, alkalinity, hardness, conductivity, BOD and COD. The river was designated fit for bathing in all the monitoring locations except Bhagwati Nagar which recorded a BOD value >5 mg/L because of domestic sewage and municipal waste dumping. The overall water quality in the river during lockdown was good and falls in Class B with pH (7.0–8.5), alkalinity (23.25–185.0 mg/L), hardness (84.25–177.5 mg/L), conductivity (117–268 ms/cm). The improved water quality obtained during lockdown is never long-lasting as evident from the BOD and COD values observed during Unlock 1.0 due to accelerated anthropogenic activities in response to overcoming the economic loss, bringing the river water quality back to the degraded state. The statistical analysis known as cluster analysis has also been performed to evaluate the homogeneity of various monitoring sites based on the physicochemical variables. The need of the hour is to address the gaps of rejuvenation strategies and work over them for effective river resiliency and for sustainable river basin management.

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“…There are 13 large dams in the Nakdong River watershed. During the recent Four Large River Projects (2008–2012), eight large weirs were added to the main river channel (Normile, 2010), which resulted in reduced river flow and the proliferation of lentic species (Jo et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

“…The Nakdong River Estuary (35.078973°N, 128.932437°E) is a critical wintering site for migratory birds on the East Asian‐Australasian Flyway (Figure 1). However, the construction of large dams, weirs, and estuarine barrages in the main channel has altered natural river flow into the estuary (Jo et al, 2019). From 2009 to 2018, we monitored the annual change in weather conditions, the amount of freshwater discharge from the estuarine barrage, salinity, distribution of plants used as a food source, and the number of whooper swans in the study area.…”

Section: Methodsmentioning

confidence: 99%

Effects of regulated dam discharge on plants and migratory waterfowl are mediated by salinity changes in estuaries

Kim

2020

Internat Rev Hydrobiol

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The rapid increase in dam construction has resulted in a worldwide loss of natural river flows. Regulated dam discharge into estuaries can interrupt the spatiotemporal occurrence of brackish communities adapted to optimal salinity ranges, further threatening biodiversity and ecosystem function in the affected regions. We used annual survey records from the Nakdong River Estuary from 2009 to 2018 to identify the indirect effect of regulated dam discharge on plants and migratory waterfowl. Increased mean salinity during the spring season negatively influenced the area covered by plants and the number of days on which swans were present during winter. Moreover, the mean salinity during the early growing periods of plants providing food to waterfowl was regulated by the amount of freshwater discharge from the estuarine barrage rather than by the direct effect of precipitation. Conservation managers should consider the amount of dam discharge and the salinity conditions during spring to maintain sufficient food resources and supporting functions for migratory waterfowl in the estuary. Our study highlights the need for a comprehensive assessment of time‐lag effects to minimize the negative impacts resulting from regulated dam discharge.

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Responses of fish assemblage structure to large-scale weir construction in riverine ecosystems

Cited by 29 publications

References 49 publications

Habitat use, movement and activity of two large‐bodied native riverine fishes in a regulated lowland weir pool

Habitat use, movement and activity of two large‐bodied native riverine fishes in a regulated lowland weir pool

Impact assessment on water quality in the polluted stretch using a cluster analysis during pre- and COVID-19 lockdown of Tawi river basin, Jammu, North India: an environment resiliency

Effects of regulated dam discharge on plants and migratory waterfowl are mediated by salinity changes in estuaries

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