A set of marine microalgae bioassays for the evaluation of biological water quality in enclosure areas in south of Spain

2003 ◽  
Vol 47 (9) ◽  
pp. 85-92 ◽  
Author(s):  
M.C. Garrido-Pérez ◽  
A. Acevedo-Merino ◽  
E. Nebot-Sanz ◽  
D. Sales-Márquez
Keyword(s):  
Water Quality ◽  
Iberian Peninsula ◽  
Toxicity Tests ◽  
Chemical Parameters ◽  
Biological Water ◽  
Physical Chemical ◽  
Test Organisms ◽  
Taxonomic Range ◽  
Receiving Waters ◽  
Biological Water Quality

The aim of this study has been the identification of the nutritive status (oligotrophy and eutrophy) in four enclosure areas from Gulf of Cadiz (Southwest Iberian Peninsula - Europe) by means of a battery of water column toxicity tests. The test organisms were four marine microalgaes which comprised a wide taxonomic range. Growth tests with receiving waters from the four study areas were carried out under two nutritive conditions; with and without additional nutrient-enriched medium. The results of both bioassays were used to define a new eutrophication index (IE). The IE index obtained presents a good correlation with the traditional physical-chemical parameters in the enclosure areas; nevertheless in open waters where the dilution processes are more important the results show less correlation.

Impact of Lagoon Effluent on an Inland Stream – A 10 Year Perspective

1989 ◽  
Vol 21 (2) ◽  
pp. 289-292 ◽  
Author(s):  
G. P. Skerry ◽  
J. G. Parker
Keyword(s):  
Water Quality ◽  
Water Body ◽  
Inland Waterways ◽  
Inland River ◽  
Biological Water ◽  
Physical Chemical ◽  
Treated Effluent ◽  
Receiving Stream ◽  
The Impact ◽  
Biological Water Quality

The discharge of lagoon treated effluent to inland waterways has long been of contention in relation to the impact of residual algal cells and nutrients in the receiving water body, especially a water body used extensively for recreation. This paper examines the pre lagoon and post lagoon discharge effects on water quality in a major inland river over a ten year monitoring period. The impact of a lagoon discharge flow of up to 20 ML/day during summer conditions is assessed in relation to effect on receiving stream physical, chemical and biological water quality indicators and implications for management are assessed and evaluated.

scholarly journals Survey of Physical, Chemical, and Microbial Water Quality in Greenhouse and Nursery Irrigation Water

2012 ◽  
Vol 22 (6) ◽  
pp. 778-786 ◽  
Author(s):  
Dustin P. Meador ◽  
Paul R. Fisher ◽  
Philip F. Harmon ◽  
Natalia A. Peres ◽  
Max Teplitski ◽  
...  
Keyword(s):  
Water Quality ◽  
Irrigation Water ◽  
The United States ◽  
Aerobic Bacteria ◽  
Source Water ◽  
Microbial Water Quality ◽  
Biological Water ◽  
Physical Chemical ◽  
Biological Water Quality

The objective was to analyze the physical, chemical, and biological water quality in horticulture irrigation systems in 24 ornamental plant greenhouses and nurseries in the United States. At each greenhouse or nursery, water was collected from up to five points (“Sample Types”) which included 1) “Source” from municipal or private well supplies, 2) “Tank” from enclosed storage containers, 3) “Subirrigation” from water applied to crops in ebb-and-flood systems, 4) “Furthest Outlet” that were irrigation emitters most distant from the Source, and 5) “Catchment Basin” from open outdoor retention areas. On average, Source water had the highest physical and microbial quality of Sample Types including the highest ultraviolet (UV) light transmission at 86%, lowest total suspended solids (TSS) at 3.1 mg·L−1, and lowest density of aerobic bacteria with 1108 cfu/mL of water. Average quality of recycled water from Subirrigation or Catchment Basins did not meet recommended levels for horticultural irrigation water for UV transmission (68% to 72% compared with recommended 75%), microbial counts (>100,000 cfu/mL compared with recommended <10,000 cfu/mL), and chemical oxygen demand (COD) (48.2 to 61.3 mg·L−1 compared with recommended <30 mg·L−1). Irrigation water stored in Tanks or applied at Furthest Outlets had lower physical and biological water quality compared with Source water. Level of aerobic bacteria counts highlighted a risk of clogged microirrigation emitters from microbial contaminants, with highest bacteria levels in recirculated irrigation water. The physical, chemical, and microbial water quality results indicate a need for more effective water treatment to improve biological water quality, particularly with recirculated irrigation.

Use of Biomonitoring to Control Toxics in the United States

1988 ◽  
Vol 20 (10) ◽  
pp. 101-108 ◽  
Author(s):  
Nelson A. Thomas
Keyword(s):  
Water Quality ◽  
Chronic Toxicity ◽  
National Policy ◽  
Single Species ◽  
Field Studies ◽  
The United States ◽  
Toxicity Tests ◽  
Toxic Pollutants ◽  
Receiving Waters ◽  
Biological Field

A biomonitoring program has been developed in support of the National Policy for the Development of Water Quality-Based Permit Limitations for Toxic Pollutants. The program focuses on the use of laboratory toxicity tests on aquatic plants and animals to predict ecosystem impact caused by toxic pollutants. Both acute and chronic toxicity tests were developed to test effluents and ambient waters. Laboratory and biological field studies were conducted at nine sites. Single species laboratory toxicity tests were found to be good predictors of impacts on the ecosystem when two or more species were used. Biomonitoring can be undertaken either on effluents and/or on the receiving waters. In that toxicity related to seeps, leachates and storm sewers has often been found upstream from dischargers, it is beneficial to conduct both effluent and ambient biomonitoring.

scholarly journals Biological water quality assessment in the degraded Mutara rangelands, northeastern Rwanda

2019 ◽  
Vol 191 (3) ◽  
Author(s):  
Marie-Claire Dusabe ◽  
Torsten Wronski ◽  
Guilherme Gomes-Silva ◽  
Martin Plath ◽  
Christian Albrecht ◽  
...  
Keyword(s):  
Water Quality ◽  
Quality Assessment ◽  
Water Quality Assessment ◽  
Biological Water ◽  
Biological Water Quality

scholarly journals PHYSICOCHEMICAL AND BIOLOGICAL WATER QUALITY ASSESSMENT OF LAKE HAWASSA FOR MULTIPLE DESIGNATED WATER USES

2016 ◽  
Vol 9 (2) ◽  
pp. 146-157
Author(s):  
Adimasu Woldesenbet Worako
Keyword(s):  
Water Quality ◽  
Water Quality Assessment ◽  
Quality Parameters ◽  
Ethiopian Rift ◽  
Trophic State Index ◽  
Monthly Basis ◽  
Biological Water ◽  
State Index ◽  
Rift Valley Lakes ◽  
Biological Water Quality

Lake Hawassa is one of the Major Ethiopian Rift Valley Lakes which is situated in southern regional state, which has a closed basin system and receives water from only Tikurwuha River and runoff from the catchment. Quality of the lake water is vital for the surrounding community for proper and safe use of the lake. The present study was designed to examine the physicochemical and biological water quality suitability for multiple purposes and to determine trophic state index of the lake for a period of three months from December to February, 2011/12. Water samples were collected from the lake on monthly basis and analyzed for all water quality parameters by using standard methods. Data analysis was performed by descriptive, multivariate analysis (MANOVA%

scholarly journals SEASONAL BIOLOGICAL WATER QUALITY ASSESSMENT OF RIVER KSHIPRA USING BENTHIC MACRO-INVERTEBRATES

2015 ◽  
Vol 3 (9SE) ◽  
pp. 1-7
Author(s):  
Akhand Archna ◽  
Shrivastava Sharad ◽  
Akhand Pratibha
Keyword(s):  
Water Quality ◽  
River Water ◽  
Benthic Fauna ◽  
Water Quality Assessment ◽  
Seasonal Abundance ◽  
Dominant Group ◽  
Biological Water ◽  
Water Quality Status ◽  
Biological Water Quality

The water quality of River Kshipra in stretch of 195 km was studied for water quality status using benthic macro invertebrates for all three seasons’ monsoon, winter and summer. The River water quality is subject to severe domestic and industrial pollution at compete stretch of River. In the present investigation a total of 13 Orders of macrobenthic fauna i.e. Ephemeroptera, Trichoptera, Placoptera, Coleoptera, Hemiptera, Odonata, Crustacea, Diptera, Pulmonata, Operculata, Pulmonata, Oligochaeta and Hirudinea belong to 3 Phylum’s Arthropoda, Mollusca and Annelida were reported. Arthropoda was the most dominant group in all seasons. On seasonal comparison of benthic fauna is observe that abundance were decreasing order were, Winter > Monsoon > summer. To monitor the water quality samples from two years (2010-12) from different stations were collected monthly. The works highlighted the condition of the River water in various seasons with respect of the seasonal abundance of the benthic macro-invertebrates organisms mentioned above.

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