Spatial and seasonal dynamics of fish assemblage along river Soan, Pakistan and its relationship with environmental conditions

Nazeer, Summya; Hashmi, Muhammad Zaffar; Malik, Riffat Naseem

doi:10.1016/j.ecolind.2016.05.034

Cited by 11 publications

(9 citation statements)

References 27 publications

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“…On the other hand, Dhoke Pathan sub catchment lies downstream of the river and is comprised of hills of low elevations and plateaus. Deep gullies and gorges play a key role in the composition of wasted land as a main land use in the region along with rainfed agriculture [16].…”

Section: Study Areamentioning

confidence: 99%

Impacts of Climate Change on the Hydrometeorological Characteristics of the Soan River Basin, Pakistan

Usman¹,

Ndehedehe

Ahmad³

et al. 2021

Atmosphere

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The global hydrological cycle is vulnerable to changing climatic conditions, especially in developing regions, which lack abundant resources and management of freshwater resources. This study evaluates the impacts of climate change on the hydrological regime of the Chirah and Dhoke Pathan sub catchments of the Soan River Basin (SRB), in Pakistan, by using the climate models included in the NEX-GDDP dataset and the hydrological model HBV-light. After proper calibration and validation, the latter is forced with NEX-GDDP inputs to simulate a historic and a future (under the RCP 4.5 and RCP 8.5 emission scenarios) streamflow. Multiple evaluation criteria were employed to find the best performing NEX-GDDP models. A different ensemble was produced for each sub catchment by including the five best performing NEX-GDDP GCMs (ACCESS1-0, CCSM4, CESM1-BGC, MIROC5, and MRI-CGCM3 for Chirah and BNU-ESM, CCSM4, GFDL-CM3. IPSL-CM5A-LR and NorESM1-M for Dhoke Pathan). Our results show that the streamflow is projected to decrease significantly for the two sub catchments, highlighting the vulnerability of the SRB to climate change.

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Section: Study Areamentioning

confidence: 99%

Impacts of Climate Change on the Hydrometeorological Characteristics of the Soan River Basin, Pakistan

Usman¹,

Ndehedehe

Ahmad³

et al. 2021

Atmosphere

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“…Understanding of spatial and temporal dynamics of fish assemblages is fundamental to interpreting those factors that influence the structuring of fish populations (Silvano et al, 2000). Those variations may occur in fish composition at a scale as small as a microhabitat or as large as a basin and may occur in days or as long as decades (Schlosser, 1982;Adams et al, 2004;Nazeer et al, 2016;Wang et al, 2019). Studying the patterns of such variations has been the major focus of freshwater ecology (Rahel and Hubert, 1991;Covich, 2006).…”

Section: Introductionmentioning

confidence: 99%

Spatio-temporal dynamics of fish assemblage in the Datong and Xiaotong rivers, karst tributaries in the upper Yangtze River drainage: Implications for ecological adaptation and conservation of fish in rivers

et al. 2022

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The Datong and Xiaotong rivers are karst tributaries in the upper Yangtze River drainage and represent considerable habitat diversity that contributes to high fish diversity and rich fishery resources in the two rivers. During the few decades, fish resources have abruptly declined due to overfishing, water pollution and habitat degradation. In order to further strengthen conservation and restoration of fish resources and provide scientific support for fishery management in these rivers, the temporal and spatial dynamics of fish assemblage in the Datong and Xiaotong rivers were investigated in the present study. A total of 45 species were captured at 30 sample sites during four surveys conducted from March 2016 to January 2017. Species diversity and richness both increased from upstream to downstream in the two rivers. The fish assemblages significantly differed between river reaches, while did not differ in significantly between 4 months. The spatial variations in the abundance of Rhynchocypris oxycephalus, Zacco platypus, Triplophysa bleekeri, Sinogastromyzon szechuanensis, Platysmacheilus nudiventris, Sinibrama taeniatus, Saurogobio gymnocheilus, Pseudorasbora parva, Pseudobagrus truncates and Opsariichthys bidens were considered to contribute most to the spatial pattern of fish assemblages. The lack of a temporal pattern of the fish assemblage in the rivers might be attributed to ecological habits of short-distance migration and diversified mesohabitats with riffles and pools for fish spawning, feeding or overwintering within a very short river range. Our results suggest the spatio-temporal dynamics of fish assemblages is highly adapted to the habitat characteristics in the two karst rivers. We recommend that fish conservation of these tributaries be focused on the mesohabitats, particularly the many pools and riffles.

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“…However, dam construction is accompanied by the transformation of a wide range of aquatic ecosystems and alteration of river flow dynamics. Among the most prominent effects of dam construction are variations in sediment transport conditions, alteration of river thermal regime, obstruction of fish migratory patterns, and destabilization of riverine biodiversity (Allan 2004;Nazeer et al 2016;Stähly et al 2019). These effects may continue for many years, even decades, or constitute a permanent ecohydrological change that may or may not reach a new equilibrium.…”

Section: Introductionmentioning

confidence: 99%

Monitoring Inflow Dynamics in a Multipurpose Dam Based on Travel-Time Principle

Sawaf

Kawanisi

Xiao

et al. 2021

Preprint

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Understanding inflow dynamics in a dam lake forms the basis for optimal dam operation and management practices. However, methods pertaining to adequately determining negative inflows and addressing them, as well as quantifying uncertainties in dam inflow, have been scarcely investigated. In this study, the inflow was observed using two pairs of fluvial acoustic tomography (FAT) systems placed diagonally in a dam lake, forming a crossed-shaped pattern. The “travel-time” principle is the primary approach for measuring the inflow by FAT. The novelty of this study is in discussing the inflow characteristics within a slow water-flow environment monitored by FAT. Based on the reciprocal sound transmission, we upgraded an equation to estimate the flow direction; this newly proposed generalized equation can be used in a fluctuating flow environment. We also discussed the sound propagation characteristics for slow flow velocities. Finally, we demonstrated that a small inaccuracy in the acoustic signal, even by a sub-millisecond, can cause significant errors in measurements. One of the novel findings of this study is the detection of internal waves using the improved flow direction equation and acoustic travel-time records. Overall, this study presents a promising approach for inflow measurements under extremely slow flow conditions.

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Spatial and seasonal dynamics of fish assemblage along river Soan, Pakistan and its relationship with environmental conditions

Cited by 11 publications

References 27 publications

Impacts of Climate Change on the Hydrometeorological Characteristics of the Soan River Basin, Pakistan

Impacts of Climate Change on the Hydrometeorological Characteristics of the Soan River Basin, Pakistan

Spatio-temporal dynamics of fish assemblage in the Datong and Xiaotong rivers, karst tributaries in the upper Yangtze River drainage: Implications for ecological adaptation and conservation of fish in rivers

Monitoring Inflow Dynamics in a Multipurpose Dam Based on Travel-Time Principle

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