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Impact of River-Reservoir Hybrid System on Zooplankton Community and River Connectivity. SUSTAINABILITY 2022. [DOI: 10.3390/su14095184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
Anthropogenic connectivity regulation in rivers, such as via weirs and dams, affects the plankton community. We hypothesized that the longitudinal similarity of the zooplankton community in a river could change in a river–reservoir hybrid system (RRHS). The impact of weir construction on zooplankton communities in terms of species diversity, abundance, and community structure was examined biweekly at six sites on the Nakdong River for 14 years (before construction: 2002–2008; after construction: 2012–2018). We checked time-series alignment using a dynamic time-warping method between longitudinal survey sites. After RRHS, the zooplankton community showed an increasing number of species. However, RRHS decreased the longitudinal similarity in terms of number of zooplankton species and population density. Our results demonstrate the negative effect of lateral infrastructures on zooplankton populations due to river fragmentation and habitat alteration.
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Kour G, Kothari R, Dhar S, Pathania D, Tyagi VV. 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. ENERGY, ECOLOGY & ENVIRONMENT 2022; 7:461-472. [PMID: 34095454 PMCID: PMC8164404 DOI: 10.1007/s40974-021-00215-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 04/15/2021] [Accepted: 05/15/2021] [Indexed: 05/03/2023]
Abstract
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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Affiliation(s)
- Gagandeep Kour
- Department of Environmental Sciences, Central University of Jammu, Bagla, Rahya Suchani, Samba, J&K 181143 India
| | - Richa Kothari
- Department of Environmental Sciences, Central University of Jammu, Bagla, Rahya Suchani, Samba, J&K 181143 India
| | - Sunil Dhar
- Department of Environmental Sciences, Central University of Jammu, Bagla, Rahya Suchani, Samba, J&K 181143 India
| | - Deepak Pathania
- Department of Environmental Sciences, Central University of Jammu, Bagla, Rahya Suchani, Samba, J&K 181143 India
- Department of Chemistry, Sardar Vallabhai Patel Cluster University, Mandi, Himachal Pradesh 175001 India
| | - V. V. Tyagi
- School of Energy Management, Shri Mata Vaishno Devi University, Katra, J&K 182320 India
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Moi DA, Alves DC, Figueiredo BRS, Antiqueira PAP, Teixeira de Mello F, Jeppesen E, Romero GQ, Mormul RP, Bonecker CC. Non-native fishes homogenize native fish communities and reduce ecosystem multifunctionality in tropical lakes over 16 years. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 769:144524. [PMID: 33482541 DOI: 10.1016/j.scitotenv.2020.144524] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 12/11/2020] [Accepted: 12/12/2020] [Indexed: 06/12/2023]
Abstract
Non-native species are considered a major global threat to biodiversity, and their expansion to new ecosystems has recently increased. However, the effect of non-native species on ecosystem functioning is poorly understood, especially in hyperdiverse tropical ecosystems of which long-term studies are scarce. We analyzed the relationship between richness, biomass, and β-diversity of non-native and native fishes during 16 years in five hyperdiverse tropical shallow lakes. We further elucidated how an observed increase in the proportion of richness, biomass, and β-diversity of non-native over native fishes affect crucial multifunctional processes of lakes (decomposition, productivity). We found a general positive relationship between the richness and biomass of non-native and native fishes. However, the slope of this relationship decreased continuously with time, displaying an increase in non-native species richness and a decrease in native species richness over time. We also detected a negative relationship between the β-diversity of non-native and native fishes over time. Moreover, the increase in the non-native:native ratio of species richness, biomass, and β-diversity over time decreased ecosystem multifunctionality. Our results suggest that non-native fishes caused a homogenization of the native fish species over time, resulting in impoverishment of ecosystem multifunctionality; in part because non-native fishes are less productive than native ones. Therefore, focus on long-term effects and use of multiple biodiversity facets (α- and β-diversity) are crucial to make reliable predictions of the effects of non-native fish species on native fishes and ecosystem functioning.
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Affiliation(s)
- Dieison André Moi
- Department of Biology, Graduate Program in Ecology of Inland Waters, Nupelia, University of Maringá, Jd. Universitário, Maringá, PR 87020-900, Brazil.
| | - Diego Corrêa Alves
- Department of Biology, Graduate Program in Ecology of Inland Waters, Nupelia, University of Maringá, Jd. Universitário, Maringá, PR 87020-900, Brazil
| | | | - Pablo Augusto Poleto Antiqueira
- Laboratory of Multitrophic Interactions and Biodiversity, Department of Animal Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP 13083-862, Brazil
| | - Franco Teixeira de Mello
- Departamento de Ecología y Gestión Ambiental CURE, Universidad de la República, Tacuarembó s/n, Maldonado, Uruguay
| | - Erik Jeppesen
- Department of Bioscience, Aarhus University, Vejlsøvej 25, 8600 Silkeborg, Denmark; Sino-Danish Centre for Education and Research (SDC), University of Chinese Academy of Sciences, Beijing, China; Limnology Laboratory, Department of Biological Sciences and Centre for Ecosystem Research and Implementation, Middle East Technical University, Ankara, Turkey; Institute of Marine Sciences, Middle East Technical University, Mersin, Turkey
| | - Gustavo Quevedo Romero
- Laboratory of Multitrophic Interactions and Biodiversity, Department of Animal Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP 13083-862, Brazil
| | - Roger Paulo Mormul
- Department of Biology, Graduate Program in Ecology of Inland Waters, Nupelia, University of Maringá, Jd. Universitário, Maringá, PR 87020-900, Brazil
| | - Claudia Costa Bonecker
- Department of Biology, Graduate Program in Ecology of Inland Waters, Nupelia, University of Maringá, Jd. Universitário, Maringá, PR 87020-900, Brazil
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Comparison of Zooplankton Community Patterns in Relation to Sediment Disturbances by Dredging in the Guemho River, Korea. WATER 2020. [DOI: 10.3390/w12123434] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This study aimed to determine whether a swimming-type (planktonic and epiphytic) zooplankton group compared with the taxonomic group is appropriate to indicate the environmental changes caused by dredging. Water sampling in the littoral zone was conducted from 2007 to 2015, including the dredging period from October 2010 to June 2012. The water quality, number of species, population densities, and biotic indices were compared for both dredging period and grouping type. Nine of 11 water quality parameters were changed by the dredging period. The results showed that the rotifer and planktonic groups were consistently dominant. In all groups, population density was the lowest during the dredging period. After dredging, both the number of species and population density increased only in the epiphytic group. The dominant species, including Polyarthra vulgaris, Brachionus calyciflorus, B. rubens, and Bosmina longirostris, were included in the planktonic group for 9 years. Evenness did not differ, but diversity increased after the dredging period. This study showed that zooplankton could be used as a supplemental biological assessment tool for evaluating the impact of river dredging.
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Relationships of otter populations with fish, macroinvertebrates and water quality across three Korean rivers revealed by inferential modelling based on evolutionary computation. ECOL INFORM 2020. [DOI: 10.1016/j.ecoinf.2020.101108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Hong S, Kim JY, Kim YM, Do Y, Kim DK, Joo GJ. Factors influencing initial population establishment and habitat expansion of introduced nutrias (Myocastor coypus) in South Korea. ECOL INFORM 2020. [DOI: 10.1016/j.ecoinf.2020.101111] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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First Gut Content Analysis of 4th Instar Midge Larvae (Diptera: Chronomidae) In Large-Scale Weirs Using a DNA Meta-Barcoding Approach. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17082856. [PMID: 32326237 PMCID: PMC7215506 DOI: 10.3390/ijerph17082856] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 04/07/2020] [Accepted: 04/15/2020] [Indexed: 12/31/2022]
Abstract
Chironomidae larvae play an important role in the food chain of river ecosystems in Korea, where it is dominant. However, detailed information on the diet of Chironomidae larvae are still lacking. The purpose of this study was to identify the gut contents of 4th instar larvae of a Chironomidae inhabiting four large-scale weirs (Sejong Weir, Juksan Weir, Gangjeong-Goryeong Weir, and Dalseong Weir) using a DNA meta-barcoding approach. We found that dominant Operational Taxonomic Unit (OUT) was assigned to Paractinolaimus sp. (Nematoda), and the sub-dominant OTU was assigned to Dicrotendipes fumidus (Chironomidae). The most common OTUs among the individuals included phytoplankton, such as Tetrahymena sp., D. armatus, Pseudopediastrum sp., Tetradesmus dimorphus, Biddulphia tridens, and Desmodesmus spp. We calculated the selectivity index (E’) and provided scientific evidence that Chironomidae larvae have a significant preference (E’ > 0.5) for Desmodesmus armatus, E. minima, and T. dimorphus, while it does not show preference for other species found in its gut. Differences in physico-chemical factors, such as water quality, nutrients, Chl-a, and carbon concentrations, resulting from anthropogenic impacts (i.e., construction of large-scale weirs) as well as the particle size of prey organisms (small-sized single cell) and effects of chemicals (chemokinesis) could affect the feeding behavior of Chironomidae larvae.
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Koster WM, Dawson DR, Kitchingman A, Moloney PD, Hale R. Habitat use, movement and activity of two large-bodied native riverine fishes in a regulated lowland weir pool. JOURNAL OF FISH BIOLOGY 2020; 96:782-794. [PMID: 32017088 PMCID: PMC7079010 DOI: 10.1111/jfb.14275] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 09/19/2019] [Accepted: 02/03/2020] [Indexed: 06/10/2023]
Abstract
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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Affiliation(s)
- Wayne M. Koster
- Department of Environment, Land, Water and PlanningArthur Rylah Institute for Environmental ResearchHeidelbergAustralia
| | - David R. Dawson
- Department of Environment, Land, Water and PlanningArthur Rylah Institute for Environmental ResearchHeidelbergAustralia
| | - Adrian Kitchingman
- Department of Environment, Land, Water and PlanningArthur Rylah Institute for Environmental ResearchHeidelbergAustralia
| | - Paul D. Moloney
- Department of Environment, Land, Water and PlanningArthur Rylah Institute for Environmental ResearchHeidelbergAustralia
| | - Robin Hale
- Department of Environment, Land, Water and PlanningArthur Rylah Institute for Environmental ResearchHeidelbergAustralia
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