Ammonia Influences the Zooplankton Assemblage and Beta Diversity Patterns in Complicated Urban River Ecosystems

Water, Journal Year: 2023, Volume and Issue: 15(8), P. 1449 - 1449

Published: April 7, 2023

Beta diversity represents the spatial or temporal variation of species among sampling sites and may be composed two elements: turnover (Brepl, replacement assemblages) nestedness (Brich, loss gain assemblages). Knowledge mechanisms driving beta contributes to an understanding in aquatic ecosystem community structures. We sampled zooplankton assemblages at 24 11 rivers Shanghai City conducted a nutrient addition experiment elucidate effects various environmental variables on structure patterns zooplankton. The differed significantly ammonia nitrogen (NH3-N) concentrations below (Group I) above II) 1.03 mg·L−1. further demonstrated that composition changed markedly along concentration gradient (0.2 5.0 mg N·L−1). total Group I was considerably higher than II, indicating high (ammonia) pollution led biotic homogeneity. Overall, key factor determining groups, suggesting importance assemblages. Furthermore, we found correlation between factors (mainly content) zooplankton, (Brepl Btotal) decreased with increasing trophic state. These findings provide insight into changing characteristics river networks help guide managers dealing conservation strategies for biodiversity preservation urban ecosystems.

Language: Английский

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Are rotifer indices suitable for assessing the trophic status in slow-flowing waters of canals?

Hydrobiologia, Journal Year: 2023, Volume and Issue: 851(12-13), P. 3013 - 3023

Published: June 20, 2023

Abstract Zooplankton indicators based on rotifers (TSI ROT ) and an indicator Secchi disk visibility SD were used to assess trophic state changes in artificial, slow-flowing, stagnant canal waters. The study was conducted the summers of 2019, 2021, 2022 Bydgoszcz Canal Noteć (Poland). Water samples taken from five sites once month July August. In terms species number density, dominated among zooplankton (at almost all sites), which reflected high state. Our results showed statistically significant correlations between TSI as well individual ROT1 (Rotifer numbers), ROT2 biomass), ROT3 (bacterivorous numbers rotifers), ROT6 (rotifers indicating state), . According our study, presented indices most likely determine trends cumulative studied canals. Similarly previous studies performed lakes small reservoirs, constituted a useful It seems that, for slowly flowing waters canals such Canal, method status may be applied.

Language: Английский

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Coastal residential canals harbor distinct water quality conditions and phytoplankton community composition

Estuarine Coastal and Shelf Science, Journal Year: 2023, Volume and Issue: 296, P. 108595 - 108595

Published: Dec. 12, 2023

As urbanization increases, many regions around the globe are seeing an increase in number of residential canal systems along their coastlines. These canals possess unique attributes that may facilitate water quality degradation, namely shallow depths, susceptibility to urban runoff, and limited flushing. Despite this, there has been little research on phytoplankton dynamics these systems. In this study, biomass/composition were quantified once per month fall winter, twice spring summer, over a 1-year period at three sites mouth-interior gradient system North Padre Island (Corpus Christi, Texas, USA). It was hypothesized interior would exhibit symptoms degradation more regularly than site mouth, also have higher chlorophyll distinct community composition compared mouth. Results showed mouth exhibited lower inorganic nutrient concentrations less pronounced variability salinity nutrients sites. Chlorophyll 2.5-3-fold average, diatoms dominated while diverse assemblage Episodic persistent hypoxia observed sites, but not findings show artificial coastal desirous conditions communities, pointing need for additional foster support effective ecosystem health management efforts.

Language: Английский

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Biodiversity of Cladocera and Water Quality for Euphrates River in the Eastern of Al- Qadisiyah Governorate, Iraq

Egyptian Journal of Aquatic Biology and Fisheries, Journal Year: 2024, Volume and Issue: 28(1), P. 1 - 17

Published: Jan. 1, 2024

Language: Английский

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Etude préliminaire de la diversité et de la structure du peuplement zooplanctonique de la rivière Okpara au Bénin

European Scientific Journal ESJ, Journal Year: 2024, Volume and Issue: 20(15), P. 175 - 175

Published: May 31, 2024

La présente étude a pour objectif d’évaluer la diversité et structure du zooplancton dans rivière Okpara. Le de été identifié sa communauté évaluée neuf stations sélectionnées grâce à richesse taxonomique, densité, l’indice Shannon d’équitabilité Piélou. Un total 68 espèces enregistré, réparties en trois groupes : comprenant des rotifères (57), copépodes (07) cladocères (04). nombre d’espèces plus élevé le cours inférieur, que supérieur moyen. Les représentent les abondant avec 78,25 % l'abondance totale, suivis (20,7 %) (1,3 %). Keratella valga Tropocyclops confinis sont abondantes. Mytilina sp., Asplanchna girodi, Anuraeopsis Lepadella brightwellii, navicular, Trichocerca sp. tenuior ont enregistrés sur toutes stations. valeurs moyennes d’abondance densité moyenne élevées saison sèche qu’en pluvieuse. richesse, Piélou pluvieuse sèche. forte présence certaines indicatrices pollution telles brightwelli, Brachionus angularis, falcatus pourrait indiquer polluants organiques rivière. Il est donc nécessaire mettre place mesures surveillance efficaces afin protéger toute intrusion anthropogénique. The objective of this study was to assess the diversity and zooplankton in Okpara River. river's were identified their community assessed at nine selected using taxonomic richness, density, index Pielou equitability index. A species recorded, divided into three groups: rotifers copepods cladocerans number higher lower reaches than upper middle reaches. Rotifers most abundant group with 78.25% abundance, followed by (20.7%) (1.3%). species. recorded all values for abundance density are dry season rainy season. wet strong presence certain indicator such as angularis could indicate organic pollutants river. Effective monitoring measures therefore need be put protect river from anthropogenic intrusion.

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Etude Préliminaire de la Diversité et de la Structure du Peuplement Zooplanctonique de la Rivière Okpara au Bénin

European Scientific Journal ESJ, Journal Year: 2024, Volume and Issue: 28

Published: April 8, 2024

The objective of this study was to assess the diversity and structure zooplankton in Okpara River. river's were identified their community assessed at nine selected stations using taxonomic richness, density, Shannon index Pielou equitability index. A total 68 species recorded, divided into three groups: rotifers (57), copepods (07) cladocerans (04). number higher lower reaches than upper middle reaches. Rotifers most abundant group with 78.25% abundance, followed by (20.7%) (1.3%). Keratella valga Tropocyclops confinis species. Mytilina sp., Asplanchna girodi, Anuraeopsis Lepadella brightwellii, navicular, Trichocerca sp. tenuior recorded all stations. values for abundance density are dry season rainy season. wet strong presence certain pollution indicator such as brightwelli, Brachionus angularis falcatus could indicate organic pollutants river. Effective monitoring measures therefore need be put place protect river from anthropogenic intrusion.

Language: Английский

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Structure of Zooplanktocenoses of Water Bodies of Zoogenic Origin of Different Types in a Specially Protected Natural Territory

Inland Water Biology, Journal Year: 2024, Volume and Issue: 17(3), P. 447 - 456

Published: June 1, 2024

Language: Английский

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Structure of Zooplanktocenoses of Water Bodies of Zoogenic Origin of Different Types in a Specially Protected Natural Territory

Биология внутренних вод, Journal Year: 2024, Volume and Issue: 3, P. 431 - 441

Published: Oct. 20, 2024

Language: Английский

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Sediment as a Refuge Spot for Planktonic Crustaceans

Water, Journal Year: 2022, Volume and Issue: 14(11), P. 1680 - 1680

Published: May 24, 2022

The littoral zone of shallow water bodies (SWB) is often considered in relation to predator–prey interactions. In this study we assumed that the sediment serves as a refuge for planktonic microcrustaceans, mediated by size-dependent fish predation. order recognise impact on their prey, determined: (i) assemblage and size structure crustaceans fish; (ii) biotic interactions along gradient heterogeneity zone. results showed macrophyte-dominated SWB, large-sized cladocerans predominated were preyed upon smaller-sized fish. macrophyte-absent copepods dominated, due predation risk larger-sized Cladoceran females with egg broods mostly selected shelter. Cladocera/Copepoda ratios lower vegetated higher unvegetated SWB. adjacent revealed an opposite pattern. It important point out findings crustacean species SWB are not recorded water. result will contribute knowledge defence strategy mechanisms developed zooplankters against predators.

Language: Английский

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