Comparison of Zooplankton Community Patterns in Relation to Sediment Disturbances by Dredging in the Guemho River, Korea

Ko, Eui-Jeong; Kim, Dongkyun; Jung, Eunsong; Heo, Yu-Ji; Joo, Gea‐Jae; Kim, Hyun Woo

doi:10.3390/w12123434

Cited by 8 publications

(14 citation statements)

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“…Station 6 showed signs of recovery after the impacts. Ko et al [82] reported a signi cant recovery in the number of species and individuals after dredging operations. High ow velocity could be responsible for the relatively lower abundance in Station 3.…”

Section: Discussionmentioning

confidence: 99%

Water Quality and Plankton Assessment of Eme River, Umuahia, Southeast Nigeria

Anyanwu

Adetunji

Umeham

2021

Preprint

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Certain anthropogenic activities have negative impacts on the aquatic ecosystems. Plankton are sensitive to their environment and are used to monitor anthropogenic impacts. A South-eastern Nigeria River was studied from December 2017 to November 2018 in 6 stations; to assess the plankton community, water quality and anthropogenic impacts. The river was subjected to intense sand mining activities among other activities. The plankton was sampled with filtration method while water was collected and analysed using standard methods. A total of 36 phytoplankton species and 27 zooplankton species were recorded with Chlorophyceae and Rotifers being the most abundant groups. The most abundant species - Melosira granulata (phytoplankton) and Daphnia pulex (zooplankton) are pollution indicators. Some of the physicochemical parameters showed that the river was perturbed by the anthropogenic activities in the watershed. However, the plankton assemblage and community structure gave an indication of a stable environment; though the zooplankton fauna showed some level of stress. The impacts of sand mining activities on water quality and plankton were more in the downstream stations (4–6) where sand mining was intense while perturbation from swimming children and related activities were observed in station 1 especially during the dry season. The presence of eutrophic indicators and tolerant species showed that the river was tending towards eutrophication. Sand mining activities contributed to the nutrient enrichment of the river. CCA showed the major water quality parameters that influenced the plankton community structure. There is need to regulate illegal sand mining activities in the river.

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Section: Discussionmentioning

confidence: 99%

Water Quality and Plankton Assessment of Eme River, Umuahia, Southeast Nigeria

Anyanwu

Adetunji

Umeham

2021

Preprint

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“…A short life cycle and adaptation ability from disturbance are advantages of using zooplankton as indicator species (Gurav and Pejaver 2013;Gutkowska 2013). Assembling zooplankton into functional groups effectively represents the biological components and disturbances of ecology (Krztoń and Kosiba 2020; Ko et al, 2020). In our results, the two selected zooplankton traits were adequate to represent the before-and-after comparison of the 4LRPs.…”

Section: Discussionmentioning

confidence: 55%

“…Therefore, the second factor was the swimming type (planktonic and epiphytic) that represents these habitat characteristics (Choi et al, 2013;Ko et al, 2020). In addition, the swimming type is suitable for analysing disturbances accompanying changes in ow rates and habitats, such as via RRHS.…”

Section: Introductionmentioning

confidence: 99%

“…The predation pressure of the upper predator limited the length of zooplankton individuals and induced them to take refuge (Werner and Hall, 1974;Manatunge et al, 2000). The transformed littoral zone, dredged sediment, and increased water volume can change habitat characteristics (Ko et al, 2020). Various factors need to be considered to understand the changes in zooplankton communities due to RRHS (Kim et al, 2012;Braun et al, 2021), but understanding all these factors can be challenging.…”

Section: Introductionmentioning

confidence: 99%

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Impact of river-reservoir hybrid system on zooplankton community and river connectivity

Jung

et al. 2021

Preprint

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Semi-permanent anthropogenic connectivity regulation in rivers, such as via weirs and dams, affects the plankton community. We hypothesised 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 main channel for 14 years (before construction: 2002–2008; after construction: 2012–2018). We checked time series alignment using dynamic time warping between longitudinal survey sites, regardless of RRHS. Before and after RRHS, the zooplankton community showed an increasing number of species. RRHS decreased the longitudinal connectivity in terms of zooplankton species number and population density. Our study demonstrates that longitudinal zooplankton community trends can be used to study the connectivity of rivers and that longitudinal characteristics are disrupted in RRHSs.

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“…Also, among the Cyanophyceae, the relatively unperturbed upstream stations (2 and 3) were significantly (F= 4.33, p<0.05) higher than the perturbed stations (1, 4-5) while station 6 showed signs of recovery. A significant increase in the number of species and individuals of biota after dredging operations [62].…”

Section: Phytoplankton Composition Abundance and Distributionmentioning

confidence: 99%

Assessment of Physicochemical Parameters and Phytoplankton of Eme River, Umuahia, Southeast Nigeria

Anyanwu

Adetunji

Umeham

2021

SJE

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Aquatic ecosystems respond differently to diverse anthropogenic activities in their watersheds. Phytoplankton is sensitive to their environment and is used to monitor anthropogenic impacts. A study was carried out in a South-eastern Nigerian River between December 2017 and November 2018 in 6 stations; to assess the phytoplankton community, water quality, and anthropogenic impacts. Sand mining was a major activity in the river among others. The phytoplankton was sampled with the filtration method while water was collected and analyzed using standard methods. A total of 36 phytoplankton species were recorded with Chlorophyceae being the most abundant group. The most abundant species - Melosira granulata is a pollution indicator. The water quality and phytoplankton structure showed that the water was tending towards eutrophication. This is attributed to the observed anthropogenic activities and cumulative impacts of all the activities in the watershed. The impact of sand mining activities was observed more in the downstream stations (4 – 6) while perturbation from swimming children and related activities was observed in station 1. The community structure reflected the impacts of the activities while CCA showed the major water quality parameters that influenced the phytoplankton community structure.

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Comparison of Zooplankton Community Patterns in Relation to Sediment Disturbances by Dredging in the Guemho River, Korea

Cited by 8 publications

References 50 publications

Water Quality and Plankton Assessment of Eme River, Umuahia, Southeast Nigeria

Water Quality and Plankton Assessment of Eme River, Umuahia, Southeast Nigeria

Impact of river-reservoir hybrid system on zooplankton community and river connectivity

Assessment of Physicochemical Parameters and Phytoplankton of Eme River, Umuahia, Southeast Nigeria

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