Some Observations on Phytoplankton Community Structure, Dynamics and Their Relationship to Water Quality in Five Santiago Island Reservoirs, Cape Verde

Reservoirs provide valuable services to human beings, especially in arid, semi-arid, and Mediterranean regions affected by water scarcity. The present effort aims to study the environmental descriptors of variation and the main factors influencing phytoplankton composition, structure, and diversity in five reservoirs in Santiago Island, Cape Verde, a region affected by water availability. Five campaigns took place from 2016 to 2020 to sample phytoplankton and measure environmental variables according to standard analytical methodologies. Environmental results (17 water physicochemical variables, air temperature, and precipitation) revealed that reservoirs differ in the geological influence variables. The high levels of P and N in water seem to be related to Land Use/Land Cover and are responsible for water-quality degradation. Cyanobacteria dominated the phytoplankton community and posed high risk levels, especially considering that the identified taxa are potential producers of different toxins. Taxa responsible for this dominance were not the same in all reservoirs, emphasizing the dominant role of local habitat factors on community composition and diversity. Overall, the results reveal the importance of defining integrated management plans/strategies for the set of five studied reservoirs, since the processes influencing variation in the phytoplankton community are temporal-scale dependent, with similar biogeographic patterns.

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Hydrochemistry and Evolution of Water Quality in a Context of Aridity and Increasing Agriculture in Three River Sub-Basins of Santiago Island (Cape Verde)

Geosciences ◽

10.3390/geosciences11060263 ◽

2021 ◽

Vol 11 (6) ◽

pp. 263

Author(s):

Nemias Gonçalves ◽

Teresa Valente ◽

Jorge Pamplona ◽

Isabel Margarida Horta Ribeiro Antunes

Keyword(s):

Water Quality ◽

Soil Salinization ◽

Cape Verde ◽

Management Tool ◽

Irrigated Agriculture ◽

Developing Regions ◽

Agricultural Intensity ◽

Using Data ◽

Geological Control ◽

Santiago Island

In regions under development and facing recurrent droughts, increasing the area of irrigated agriculture may create additional disruption in water resources management. The present study was focused on three river sub-basins with the highest agricultural intensity (S. Miguel, Ribeira Seca and S. Domingos) in Santiago Island (Cape Verde). Sets of wells were selected to evaluate the influence of salinization and agriculture practices on the hydrochemistry. This assessment was performed by using data from the bibliography (2003) and a recent campaign (2016). The water chemistry indicates lower mineralization in the S. Miguel sub-basin. Nitrates and nitrites, typically associated with diffuse pollution, are present in all sub-basins, but with varying patterns. Additionally, sodium chloride waters occur in all the three sub-basins, especially those closest to the coastline. In turn, a bicarbonate-magnesium facies was identified in S. Domingos, at the furthest point from the coast, indicating a geological control. The comparison between the two periods suggests a decrease in water quality. The rising extension of the irrigation area associated with aridity should intensify the already observed soil salinization. Thus, the present review highlights the strategic importance of water monitoring at the basin level as a management tool for resources preservation in insular arid and developing regions.

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Formulating biossay data of chemicals and environmental water

Water Science & Technology ◽

10.2166/wst.2000.0367 ◽

2000 ◽

Vol 42 (3-4) ◽

pp. 115-123 ◽

Cited By ~ 8

Author(s):

R. Shoji ◽

A. Sakoda ◽

Y. Sakai ◽

M. Suzuki

Keyword(s):

Water Quality ◽

Low Density Lipoprotein ◽

Water Environment ◽

Density Lipoprotein ◽

Environmental Water ◽

Toxicity Data ◽

Human Beings ◽

Environmental Waters ◽

Bodies Of Water

The quality of environmental waters such as rivers is often deteriorated by various kinds of trace and unidentified chemicals despite the recent development of sewage systems and wastewater treatment technologies. In addition to contamination by particular toxicants, complex toxicity due to multi-component chemicals could be much more serious. The environmental situation in bodies of water in Japan led us to apply bioassays for monitoring the water quality of environmental waters in order to express the direct and potential toxicity to human beings and ecosystems rather than determinating concentrations of particular chemicals. However, problems arose from the fact that bioassays for pharmaceutical purposes generally required complicated, time-consuming, expert procedures. Also, a methodology for feedback of the resultant toxicity data to water environment management has not been established yet. To this end, we developed a novel bioassay based on the low-density lipoprotein (LDL) uptake activity of human hepatoblastoma cells. The assay enabled us to directly detect the toxicity of environmental waters within 4 hours of exposure. This is a significantly quick and easy procedure as compared to that of conventional bioassays. The toxicity data for 255 selected chemicals and environmental waters obtained by this method were organized by a mathematical equation in order to make those data much more effectively and practically useful to the management of environmental waters. Our methodology represents a promising example of applying bioassays to monitor environmental water quality and generating potential solutions to the toxicity problems encountered.

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Making Sense of Water Quality: Multispecies Encounters on the Mystic River

Worldviews Global Religions Culture and Ecology ◽

10.1163/15685357-01702006 ◽

2013 ◽

Vol 17 (2) ◽

pp. 150-160 ◽

Cited By ~ 9

Author(s):

Caterina Scaramelli

Keyword(s):

Water Quality ◽

Laboratory Data ◽

Quality Data ◽

Human Beings ◽

Water Lily ◽

Water Quality Data ◽

Water Flows ◽

Making Sense ◽

Quality Of Water

This paper takes water quality as an ethnographic subject. It looks at how water quality monitors in Boston make sense of the quality of water through mundane engagement with three non-human beings who they encounter during their monitoring activities: herring, bacteria and water lily. Each of these organisms suggests a different understanding of water quality for the monitors and poses a dilemma. Water quality monitors who contribute to the production of water quality data come to know water quality as through direct interactions with these beings, mediated by both sensorial experience and laboratory data. These experiences, at the same time, confuse and redraw relationships between science, water flows, non-human vitality, including that of invasive species, and people.

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Phytoplankton community structure and it’s relationships with water quality in Bangka Island, Indonesia

ILMU KELAUTAN Indonesian Journal of Marine Sciences ◽

10.14710/ik.ijms.26.1.37-44 ◽

2021 ◽

Vol 26 (1) ◽

pp. 37-44

Author(s):

Muh Yusuf ◽

Robin Robin ◽

Wahyu Adi ◽

Mu’alimah Hudatwi ◽

Widianingsih Widianingsih ◽

...

Keyword(s):

Water Quality ◽

Phytoplankton Community ◽

Environmental Changes ◽

Total Suspended Solid ◽

Mining Area ◽

Suspended Solid ◽

Test Analysis ◽

Mining Site ◽

Average Value ◽

Primary Producer

Phytoplankton plays an important role in primary productivity in marine environment. Various environmental changes in coastal area will impact the water quality and their phytoplankton compositions. The purpose of this study is to examine the abundance of phytoplankton from two different sites, i.e Tanah Merah (close to mining site) and Semujur Island (away from mining site) in Bangka Island. Phytoplankton and water sample were collected on June- August 2018. Water quality was measured using water quality checker, whereas the phytoplankton was identified under the microscope with a magnification of 100x. Non-parametric Kruskal test and T-test analysis was performed to determine the abundance, diversity, uniform, and dominance of phytoplankton between Sites, respectively. Statistical analyses showed the abundance of phytoplankton at Semujur Island was significantly higher than that at Tanah Merah (p = 0.003). In additions the diversity, uniform, and dominance were also significantly different between sites (all p <0.05). In Semujur Island, Diatoms (Thalassiothrix, Chaetoceros and Thalassionema) were more dominants than the Dinophyceae group. However, in Tanah Merah, the genera Ceratium belong to class Dinophyceae was more dominant than the class Bacillariophyceae. These results performed that the phytoplankton in Tanah Merah and Semujur Island was affected by environment, in this case the mining area. The water quality in Semujur Island (non-mining Area) might have good quality than in Tanah Merah (mining area). The average value of turbidity and Total Suspended Solid in Tanah Merah Waters causes low abundance of phytoplankton. It can be concluded that tin mining can disrupt the abundance and composition of phytoplankton as a primary producer of waters.

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Water Quality Assessment of West Tarum Canal for Drinking Water Supply

E3S Web of Conferences ◽

10.1051/e3sconf/202127704003 ◽

2021 ◽

Vol 277 ◽

pp. 04003

Author(s):

Ayu Widya Utami ◽

Dwi Nowo Martono ◽

Haruki Agustina

Keyword(s):

Water Quality ◽

Drinking Water ◽

Integrated Management ◽

Water Quality Assessment ◽

Polluted Water ◽

Infrastructure Development ◽

Raw Water ◽

Agriculture Industry ◽

The Government ◽

Almost All

West Tarum Canal (WTC) is a canal that drains raw water from the Jatiluhur Dam. Nearly 81% of the raw water for drinking water used by Jakarta’s people comes from this canal. However, various land uses such as agriculture, industry, settlements, and infrastructure development impact WTC’s water quality. This research aims to assess WTC’s water quality in 2016-2020 based on water quality standards set by the Government and using the STORET method. The results of this research indicate that the concentrations of TDS (142-351 mg/L), Fe (0.1-0.15 mg/L), Mn (0.03-0.1 mg/L) are meet the standards, while DO (3.6-4.9 mg/L), BOD (4-10 mg/L), COD (13-30 mg/L) are not meet the standards. Almost all monitoring points have pH values between 5.75-7.68 that are meet the standards. The STORET score of WTC is from -26 to -38 with an average of -30, which indicates that WTC’s water quality is moderately polluted. Water contamination in WTC will burden the drinking water processing and ultimately affect the community’s ability to pay for drinking water. This research also shows the need for integrated management of WTC from upstream to downstream and the need to increase collaboration between stakeholders in carrying out this management.

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Summer aspect of phytoplankton communities in some Montenegrin lakes: Are there changes after more than two decades?

Archives of Biological Sciences ◽

10.2298/abs1202745r ◽

2012 ◽

Vol 64 (2) ◽

pp. 745-755

Author(s):

Jelena Rakocevic

Keyword(s):

Water Quality ◽

Sustainable Management ◽

Aquatic Ecosystems ◽

Phytoplankton Community ◽

Management Plan ◽

Phytoplankton Composition ◽

Qualitative And Quantitative ◽

Environmental Monitoring System ◽

Phytoplankton Communities ◽

Second Period

Qualitative and quantitative phytoplankton compositions of 10 Montenegrin lakes were investigated in the summer of 2007. The obtained results were compared with a previous study-period that was undertaken two decades ago. In the first period, diatoms numerically dominated the phytoplankton community in all studied lakes, while in the second period, the same was observed only in three of the ten lakes; in other studied lakes the relative contributions of green algae, dinoflagellates and/or cyanobacteria increased, while the contribution of diatoms decreased. The shift observed in phytoplankton composition and diversity in some of the studied lakes indicates an increase in the trophic level over the two decades. The sustainable management plan of the aquatic ecosystems in Montenegro should include the establishment of an environmental monitoring system in order to record any alterations that may take place in water quality.

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Phytoplankton Community Investigation and Water Quality Assessment of M River in winter in Shijiazhuang City

E3S Web of Conferences ◽

10.1051/e3sconf/202126701035 ◽

2021 ◽

Vol 267 ◽

pp. 01035

Author(s):

Ziqi Zhang ◽

Lei Yang ◽

Dongxu Han ◽

Hongyan Shen

Keyword(s):

Water Quality ◽

Species Diversity ◽

Water Body ◽

Phytoplankton Community ◽

Diversity Index ◽

Water Quality Assessment ◽

Species Diversity Index ◽

Wiener Diversity Index ◽

Eutrophic Water ◽

Evenness Index

An investigation of phytoplankton community and water quality for M River was conducted in December 2019.The results showed that 38 species of phytoplankton belonging to 6 phyla and 26 genera were collected. Among them, Bacillariophyta is the richest species, which accounted for 34.21%, followed by Cyanophyta with 26.32% and Chlorophyta with 28.95%. The density of phytoplankton was 63.0*106 inds/L which indicated as eutrophic water body. The highest density was Bacillariophyta, accounting for 51.03%. The Shannon-Wiener diversity index (H’) varied from 1.34 to 2.24, the Margalef Species diversity index (d) varied from 2.71 to 3.85, and the Pielou evenness index (J) varied from 0.38 to 0.67. According to the integrative analysis results of H’, d and J, M River water quality belongs to oligo-polluted, but individual sites belong to meso-polluted.

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