scholarly journals Predatory and competitive interaction in Anopheles gambiae sensu lato larval breeding habitats in selected villages of central Uganda

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Hudson Onen ◽  
Robinson Odong ◽  
Moses Chemurot ◽  
Frédéric Tripet ◽  
Jonathan K. Kayondo
Keyword(s):  
Anopheles Gambiae ◽  
Habitat Type ◽  
Principal Component ◽  
Temporary Pools ◽  
Microhabitat Use ◽  
Chemical Parameters ◽  
Habitat Types ◽  
Physico Chemical ◽  
Breeding Habitats ◽  
The Impact

Abstract Background Malaria is often persistent in communities surrounded by mosquito breeding habitats. Anopheles gambiae sensu lato exploit a variety of aquatic habitats, but the biotic determinants of its preferences are poorly understood. This study aimed to identify and quantify macroinvertebrates in different habitat types with determined water physico-chemical parameters to establish those preferred by An. gambiae s.l. larvae as well as their predators and competitors. Methods A field survey was conducted in Kibuye and Kayonjo villages located in the vicinity of the River Sezibwa, north-eastern Uganda to identify Anopheline larval habitats shared by aquatic insects. Habitats were geo-recorded and as streams, ponds, temporary pools and roadside ditches. From October to December 2017, random microhabitats/quadrats were selected from each habitat type, their water physico-chemical parameters (electrical conductivity, total dissolved solids, temperature and pH) were measured, and they were sampled for macroinvertebrates using standard dippers. All collected arthropod macroinvertebrates were then morphologically identified to family level and enumerated. Results Principal component analysis showed that the four larval habitat types were characterized by distinct physico-chemical parameter profiles. Ponds and streams had the highest number and diversity of macroinvertebrate insect taxa and sustained few An. gambiae s.l. larvae. Anopheles gambiae s.l. were more common in roadside ditches and particularly abundant in temporary pools which it commonly shared with Dytiscidae (predaceous diving beetles) and Culex spp. Cluster correlation analysis conducted on the abundance of these taxa within quadrats suggested that An. gambiae s.l. and Dytiscidae have the most similar patterns of microhabitat use, followed by Cybaeidae (water spiders). Whilst Culex spp. co-occurred with An. gambiae s.l. in some habitats, there was only partial niche overlap and no clear evidence of competition between the two mosquito taxa. Conclusions Ponds and streams are habitats that host the largest diversity and abundance of aquatic insect taxa. Anopheles gambiae s.l. larvae distinctively preferred temporary pools and roadside ditches, where they were exposed to few predators and no apparent competition by Culex spp. Further studies should aim to test the impact of Dytiscidae and Cybaeidae on An. gambiae s.l. dynamics experimentally. Graphical Abstract

scholarly journals Seasonal distribution and population dynamics of limnic microalgae and their association with physico-chemical parameters of river Noyyal through multivariate statistical analysis

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Pandian Suresh Kumar ◽  
Jibu Thomas
Keyword(s):  
Statistical Analysis ◽  
Multivariate Statistical Analysis ◽  
Sampling Site ◽  
Principal Component ◽  
Environmental Parameters ◽  
Diversity Indices ◽  
Population Diversity ◽  
Chemical Parameters ◽  
Multivariate Statistical ◽  
Physico Chemical

Abstract The present investigation embarks on understanding the relationship between microalgal species assemblages and their associated physico-chemical parameter dynamics of the catchment region of river Noyyal. Totally, 142 microalgae cultures belonging to 10 different families were isolated from five different sites during four seasons and relative percentage distribution showed that Scenedesmaceae (36.6%) and site S1 (26.4%) with predominant microalgae population. Diversity indices revealed that microalgae communities were characterized by high Hʹ index, lower Simpson dominance, and Margalef index value with indefinite patterns of annual variations. Results showed that variation in the physico-chemical parameters in each sampling site has its impact on the microalgae population during each season. Multivariate statistical analysis viz., Karl Pearson’s correlation coefficient, principal component analysis, and canonical correspondence analysis were applied on microalgae species data, to evaluate the seasonal relationship between microalgae and physico-chemical parameters. The findings of our study concluded that the physico- chemical parameters influenced the dominant taxa of microalgae Chlorellaceae, Scenedesmaceae and Chlorococcaceae in river Noyyal and gives a base data for the seasonal and dynamic relationship between environmental parameters and microalgae population.

scholarly journals Assessment of The Impacts of Trout Farming on Water Quality Using Macro Invertebrates as Bio- Indicators

2018 ◽  
Vol 22 (2) ◽  
pp. 175-182
Author(s):  
Anuradha Rai ◽  
Archana Niraula ◽  
Payaswini Ghimire ◽  
Aastha Pandey ◽  
Anu Gurung ◽  
...  
Keyword(s):  
Water Quality ◽  
Similarity Index ◽  
Small Scale ◽  
Multiple Site ◽  
Reference Sites ◽  
Chemical Parameters ◽  
Physico Chemical ◽  
Invertebrate Assemblages ◽  
Trout Farms ◽  
The Impact

The study was conducted to assess the impacts of trout farming on water quality using macro invertebrates as bio-indicators. Two trout farms were selected for the study, viz., Gandaki Trout Farm (GTF) in Kaski district and Fall & Trout Fish Farm (FTF) in Nuwakot district. Reference and impacted sites were selected in each trout farms from where macro invertebrates were collected and physico-chemical parameters were measured. Sorensen’s Index and Multiple Site Similarity Index were calculated to compare the macro-invertebrate assemblages between the impact and the reference sites. Water quality classes were also calculated using macro invertebrate-based tool, NEPBIOS/ASPT scores. Altogether 24 families of macro invertebrates were observed at GTF and 12 families at FTF. The Sorensen’s Similarity Index was greater than 0.5 between reference and impacted sites at GTF; whereas it was only 0.28 at FTF indicating comparatively low level of similarity. In addition, Multiple Site Similarity Index (0.64) at GTF also indicated high similarity between the macro invertebrate assemblages. Reference sites showed higher scores with higher diversity of macro invertebrates. Both farms had suitable water quality for trout (dissolved oxygen and temperature) and most of the physico-chemical parameters did not show significant differences except pH and turbidity at GTF probably due to small scale operation and production. Journal of Institute of Science and TechnologyVolume 22, Issue 2, January 2018, Page: 175-182

Colloidal speciation of heavy metals in runoff and interstitial waters of a retention/infiltration pond

2006 ◽  
Vol 54 (6-7) ◽  
pp. 307-314 ◽  
Author(s):  
B. Béchet ◽  
B. Durin ◽  
M. Legret ◽  
P. Le Cloirec
Keyword(s):  
Heavy Metals ◽  
Strong Impact ◽  
Chemical Parameters ◽  
Runoff Water ◽  
Lead And Cadmium ◽  
Physico Chemical ◽  
High Concentrations ◽  
Chemical Conditions ◽  
The Impact ◽  
Interstitial Waters

The thickness of non-saturated zone and physico-chemical conditions are important parameters to assess the impact of infiltration ponds on water resources with respect to heavy metals transfer. As changes in physico-chemical parameters of solutions have a strong impact on the mobility of colloidal phases in sediments and soils, the colloidal facilitated transfer of heavy metals has to be investigated. Therefore, this study focuses on the characterization of runoff, surface and interstitial waters in a retention/infiltration pond collecting runoff waters of a bridge near Nantes. Physico-chemical parameters and chemical analyses were performed on the waters during about one year. The separation of dissolved and colloidal fractions was carried out by filtration and ultrafiltration for one sample of surface and interstitial waters. Until now, the runoff waters were only filtered at 0.45 μm. The comparison of physico-chemical data shows that the minor variations of runoff water parameters are mitigated in basin and in soils but strong variations impact the composition of interstitial waters. High concentrations of zinc, copper and still of lead are measured in runoff. Lead and cadmium seem to be associated to colloidal and particulate fractions while zinc, copper, nickel and chromium are distributed in all fractions.

scholarly journals Monitoring the physico-chemical parameters of cabbage heads during fermentation: the impact of fermentation conditions and cabbage varieties

2018 ◽  
pp. 31-41
Author(s):  
Mirna Draskovic ◽  
Anita Vakula ◽  
Zdravko Sumic ◽  
Tatjana Danicic ◽  
Marija Jokanovic ◽  
...  
Keyword(s):  
Fermentation Process ◽  
Color Change ◽  
Ph Value ◽  
Sugar Content ◽  
Starter Culture ◽  
Nacl Solution ◽  
Chemical Parameters ◽  
Fermentation Conditions ◽  
Physico Chemical ◽  
The Impact

The influence of different fermentation conditions and cabbage hybrids and variety, ?Tenacity?, ?Bravo? and ?Futoski?, on physico-chemical properties of cabbage heads was studied in this research. Experiment was set up in industrial conditions. Samples 1T, 4B and 7F were obtained by spontaneous fermentation with 3.3% NaCl solution, samples 2T, 5B and 8F were obtained with brine from previous cabbage fermentation and samples 3T, 6B and 9F were treated with 100 mL of lactic-acid starter culture onto 3.3% NaCl solution. Previous cabbage fermentation was done with 3.3% of salt solution and final percentage of salt in brine used for investigation was 2.57%. Cabbage samples were taken after 0, 3, 6, 12, 24 days and at the end of fermentation process (44th day for one group of samples and 55th day for the other) in order to determine total color and texture changes. Temperature and pH value were analyzed during the fermentation process, while water activity (aw) and total sugars content were analyzed for raw cabbage samples and on the last fermentation day. 44th day was determined as the end of fermentation for six samples, and 55th day for three samples, by measuring remaining sugar content. Considering into account all obtained results and fermentation conditions, sample 9F shown the best properties at the last fermentation day in terms of investigated physico-chemical parameters. aw value, shear force, total color change, pH value and total sugar content of this sample on the last fermentation day were 0.958, 14672 g, 8.46, 3.45 and 0.92%, respectively.

scholarly journals Description of soil impurity for Elbasan city – Albania

2020 ◽  
Vol 13 (2) ◽  
pp. 240-244
Author(s):  
Anila Jançe ◽  
Valentin Bogoev ◽  
Admir Jançe
Keyword(s):  
Heavy Metals ◽  
Soil Pollution ◽  
Scientific Paper ◽  
Chemical Parameters ◽  
Productive Activities ◽  
Physico Chemical ◽  
Current Assessment ◽  
The Impact ◽  
First Time ◽  
Geographical Space

This scientific paper enables us to present the bacteriological, physico-chemical parameters and heavy metals present in the soil of Elbasan city. Through this study we have obtained significant data that give us the opportunity to judge about soil impurity of Elbasan city, allowing us to present a current assessment of soil pollution. The pollution of the land of a historical-cultural city like Elbasan takes on a considerable importance in terms of the impact on the health of citizens, based mainly on the cultivation of agricultural crops in the study area. In view of this goal, during the September-October 2020 period, some soil samples were taken and analyzed in the laboratory, where the area predetermined by us for samples taking consists of the geographical space where the heavy industries of Elbasan city operate. All bacteriological, physico-chemical parameters and heavy metals part of the soil of Elbasan are presented for the first time in this paper. As a result of the results obtained where we encounter a significant soil pollution of Elbasani town we think that is attributed to the fact that Elbasan has always been considered as one of the most polluted cities in Albania in recent years. Finally, we can say that land pollution comes as a result of productive activities of light and heavy industries, which operate without implementing the rules of environmental protection in Albania but also from human activity mainly in agriculture, where we mention the use without criteria of pesticides and chemical fertilizers.

scholarly journals Hydrochemical Characterisation of Groundwater Quality: Merdja Plain (Tebessa Town, Algeria)

2020 ◽  
Vol 6 (2) ◽  
pp. 318-325 ◽  
Author(s):  
Baazi Houria ◽  
Kalla Mahdi ◽  
Tebbi Fatima Zohra
Keyword(s):  
Groundwater Quality ◽  
Principal Component ◽  
Anthropogenic Factors ◽  
Agricultural Activity ◽  
Chemical Parameters ◽  
Physico Chemical ◽  
High Concentrations ◽  
Geological Formations

The objective of this work is to evaluate the physico-chemical quality of the groundwater of the Merdja plain and to determine the sources of mineralization. This quality is influenced by several environmental and anthropogenic factors such as geological context, climate, precipitation and interaction between groundwater and aquifers and human activities.  A Principal Component Analysis (PCA) on samples taken from several wells spread over the entire Tebessa plain (Merdja) allowed us to detect two axes that explain 73.4% of the information. The first axis describes the variables related to mineralisation and the second one describes those related to agricultural activity. Multidimensional Positioning (MDS) confirmed the interaction of physico-chemical parameters between them and their influence on groundwater quality by highlighting three groups of wells according to their physico-chemical characteristics, particularly those containing high concentrations of nitrates. This contamination is mainly the result of spreading the fertilisers and wastes that are dumped into the plain without treatment. Salinization is the result of long-term interactions between groundwater and geological formations.

The impact of clearfelling operations on physico-chemical parameters of aquatic ecosystems in southwest Ireland

2000 ◽  
Vol 27 (2) ◽  
pp. 1108-1115
Author(s):  
M. B. Gallagher ◽  
M. Johnson ◽  
K. O'Gorman ◽  
J. O'Halloran ◽  
P. Giller ◽  
...  
Keyword(s):  
Aquatic Ecosystems ◽  
Chemical Parameters ◽  
Physico Chemical ◽  
The Impact

scholarly journals Assessment of Ganges River Water Quality at Allahabad: A case study for the event of Magha Mela

2014 ◽  
Vol 8 (3) ◽  
pp. 8-14
Author(s):  
LN Gupta ◽  
Ram Avtar ◽  
Ameerjeet Singh ◽  
Pankaj Kumar ◽  
Emmanuel Mutisya ◽  
...  
Keyword(s):  
Water Quality ◽  
Ganges River ◽  
Pollution Load ◽  
Chemical Parameters ◽  
River Ganges ◽  
Physico Chemical ◽  
High Pollution ◽  
Water Quality Status ◽  
The Impact

Considering Ganga River as one of main Holy River in India, millions of people throng to the river to have a holy dip, Aachman (Mouthful of holy water) and cleanse themselves of sins. Magh Mela is a great festival to take place in bank of Triveni (Sangam) at Allahabad and runs more than one and half month, when millions of pilgrims from different regions in India go there for taking a holy bath in Sangam of Ganga. Thus, the bathing in the river during Magh Mela leads to high pollution of the river in comparison to other days such as normal bathing days. This study focused on the water quality status from some selected physico-chemical parameters of River Ganges and the impact of Magh Mela as well as the variation in the river’s flow rate. Results indicate that the pollution load was alarmingly high and the flow of the Ganga had been very poor. Further, the study found that the water was not fit for bathing during the 2012 Magh Mela. DOI: http://dx.doi.org/10.3126/ijls.v8i3.9303 International Journal of Life Sciences Vol.8(3): 2014: 8-14

scholarly journals The impact of the contact of venous human blood with sorbents on some of blood physicochemical parameters in vitro

2018 ◽  
Vol 17 (1) ◽  
pp. 50-60 ◽  
Author(s):  
S. I. Kuznetsov ◽  
O. P. Kirichuk ◽  
N. V. Burkova ◽  
A. A. Topko ◽  
V. A. Davankov ◽  
...  
Keyword(s):  
Venous Blood ◽  
Silica Gels ◽  
Coarse Grained ◽  
Chemical Parameters ◽  
Rotational Mode ◽  
Physico Chemical ◽  
Crosslinked Polystyrene ◽  
Acid Base Status ◽  
The Impact

Purpose of the study. To assess the effect of contact between hyper-crosslinked polystyrene (HCP) MN-202 and two silica gels (coarse-grained silica gel large-pore (CSL-2) and Silochrom S-120) with human venous blood in vitro conditions to change its physico-chemical parameters. Material and methods. In bench conditions the contact interaction of heparinized blood and sorbents in the rotational mode is carried out for 120 minutes Oxygen status, acid-base status (ABS), electrolytes and some metabolites were evaluated. The analyzer ABL 800 FLEX / 835 Version 6.13 Build 372 was used. Conclusion. HCP MN-202 and Silochrom s-120 can be used as neutral matrices to further modify and design specific hemocontact preparations.

scholarly journals Distribution Of Batillaria Zonalis (Mollusca : Gastropoda) on Avicennia Marina (Forsk.) Vierh In The Coast Of Banggi, Rembang, Central Java

Omni-Akuatika ◽  
2018 ◽  
Vol 14 (3) ◽  
Author(s):  
Dafit Ariyanto Ariyanto ◽  
Dietriech Geoffrey Bengen ◽  
Tri Prartono ◽  
Yusli Wardiatno
Keyword(s):  
Water Quality ◽  
Principal Component Analysis ◽  
Temporal Pattern ◽  
Principal Component ◽  
Avicennia Marina ◽  
Nursery Ground ◽  
Chemical Parameters ◽  
Environmental Characteristics ◽  
Central Java ◽  
Physico Chemical

Mangroves prove a habitat for Batillaria zonalis as nursery ground, feeding ground and reproductive ground. This research was conducted from September 2016 - August 2017 and to determine the spasial and temporal pattern  with based on mangrove zone  and environmental characteristics. The gastropods and environmental characteristics were analyzed using Principal Component Analysis (PCA). The results showed that significant changes in gastropod assemblages were primarily due to changes in the water quality and season. Correlation between gastropod and physico-chemical parameters in A. marina  revealed significant relationship with gastropod B. zonalis distribution.

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