scholarly journals Impact of the opening of Moriyama Dike on water quality and aquatic fauna in Honjo Area of Lake Nakaumi, Japan

2020 ◽  
Vol 81 (3) ◽  
pp. 205-221
Author(s):  
Masaki KUWABARA ◽  
Hiromichi KUWABARA ◽  
Takashi KUWABARA ◽  
Toshiaki ESUMI ◽  
Yu TABAYASHI ◽  
...  
Keyword(s):  
Water Quality ◽  
Aquatic Fauna ◽  
Lake Nakaumi

scholarly journals Impacts of Moriyama Dike opening on the water quality in summer at Honjo area, Lake Nakaumi

2020 ◽  
Vol 81 (3) ◽  
pp. 223-231
Author(s):  
Toshiaki ESUMI ◽  
Hiroshi KAMIYA ◽  
Toshikuni KATO ◽  
Yui NAKASHIMA ◽  
Hitoshi OHSHIRO ◽  
...  
Keyword(s):  
Water Quality ◽  
Lake Nakaumi

scholarly journals Water quality and ecology of the River Lee: mass balance and a review of temporal and spatial data

2004 ◽  
Vol 8 (4) ◽  
pp. 636-650 ◽  
Author(s):  
D. L. Snook ◽  
P. G. Whitehead
Keyword(s):  
Water Quality ◽  
Point Source ◽  
Environmental Quality ◽  
Spatial Data ◽  
Nutrient Enrichment ◽  
Sewage Treatment ◽  
Quality Standards ◽  
Organic Substances ◽  
Aquatic Fauna ◽  
Environmental Quality Standards

Abstract. A regional overview of the water quality and ecology of the River Lee catchment is presented. Specifically, data describing the chemical, microbiological and macrobiological water quality and fisheries communities have been analysed, based on a division into river, sewage treatment works, fish-farm, lake and industrial samples. Nutrient enrichment and the highest concentrations of metals and micro-organics were found in the urbanised, lower reaches of the Lee and in the Lee Navigation. Average annual concentrations of metals were generally within environmental quality standards although, on many occasions, concentrations of cadmium, copper, lead, mercury and zinc were in excess of the standards. Various organic substances (used as herbicides, fungicides, insecticides, chlorination by-products and industrial solvents) were widely detected in the Lee system. Concentrations of ten micro-organic substances were observed in excess of their environmental quality standards, though not in terms of annual averages. Sewage treatment works were the principal point source input of nutrients, metals and micro-organic determinands to the catchment. Diffuse nitrogen sources contributed approximately 60% and 27% of the in-stream load in the upper and lower Lee respectively, whereas approximately 60% and 20% of the in-stream phosphorus load was derived from diffuse sources in the upper and lower Lee. For metals, the most significant source was the urban runoff from North London. In reaches less affected by effluent discharges, diffuse runoff from urban and agricultural areas dominated trends. High microbiological content, observed in the River Lee particularly in urbanised reaches, was far in excess of the EC Bathing Water Directive standards. Water quality issues and degraded habitat in the lower reaches of the Lee has led to impoverished aquatic fauna but, within the mid-catchment reaches and upper agricultural tributaries, less nutrient enrichment and channel alteration has permitted more diverse aquatic fauna. Keywords: River Lee, River Thames, water quality, nutrients, metals, ecology, hydrology, diffuse and point source pollution

Impact of an Acid Spill on the Resident Fauna of the York River and its Recovery

1989 ◽  
Vol 24 (4) ◽  
pp. 569-582
Author(s):  
R. Prairie ◽  
K. Schiefer ◽  
L.J. Moulins ◽  
V. Chapados
Keyword(s):  
Water Quality ◽  
Atlantic Salmon ◽  
Benthic Communities ◽  
Survival Rates ◽  
Juvenile Salmon ◽  
York River ◽  
Aquatic Fauna ◽  
Biological Studies ◽  
Metal Levels

Abstract As a result of a sulphuric acid spill in June 1982 at the Mines Gaspé operation in Murdochville, Québec, water quality of effluents being discharged into the headwaters of the York River was temporarily impaired. It rapidly became apparent that the aquatic fauna of this important Atlantic salmon river had been affected in some areas. This paper provides an overview of the results obtained in biological studies (Atlantic salmon population and benthic communities) carried out by Beak Consultants Ltd. and Noranda Technology Centre, annually, from 1982 to 1985. The biological and water chemistry surveys carried out during this four-year period indicated a short duration event of high dissolved metal levels, primarily copper, shortly after the spill, followed by a rapid improvement in water quality. Both the aquatic macroinvertebrate benthos and fish life in the river were negatively impacted. The nature and degree of this impact as well as the subsequent recolonization of aquatic habitats by both groups were observed and documented. The most affected aquatic groups in 1982 were the youngest salmon age classes (0+ and 1+) along with the intermediate and sensitive benthic communities. This impact was mainly observed in the upper and middle river section. Maintenance of suitable water quality during the following years has permitted excellent survival rates for juvenile salmon and recolonization of benthic habitats by sensitive species. This has contributed to the gradual re-establishment of a natural aquatic fauna in the York River. More recent surveys carried out since 1985 confirm that the quality of the York River ecosystem has been maintained and suggest that the survival rates observed for juvenile salmon are higher than the theoretical values usually used in salmon production models.

Plastic Pollution and Its Impact on Aquatic Fauna

2020 ◽  
pp. 160-177
Author(s):  
Yahya Bakhtiyar ◽  
Saima Andrabi ◽  
Mohammad Yasir Arafat ◽  
Hamid Iqbal Tak
Keyword(s):  
Water Quality ◽  
Aquatic Ecosystem ◽  
Human Population ◽  
Habitat Degradation ◽  
The Other ◽  
Plastic Pollution ◽  
Aesthetic Value ◽  
Aquatic Fauna ◽  
Plastic Wastes ◽  
Plastic Products

Plastic pollution is the buildup of unwanted plastic products in the environment by its abundant and limitless use by a greedy human population in various ways. Plastics are usually made of chains of monomer units of ethylene and propylene linked together. Plastics are durable and resistant to degradation and tend to accumulate where they are disposed. One more disaster this material causes is the release of toxic chemicals with time which badly affects the ecosystem where it is dumped. Same is the case with aquatic ecosystem, because tons of plastic wastes are dumped into it in one way or the other. The major threats of this menace on aquatic ecosystem include ocean acidification, degradation of water quality, increase in number of invasive species, overfishing, pollution and choking of water bodies, habitat degradation, loss of aesthetic value, blocking of sea routes, and above all, it badly affects plant and animal life there.

scholarly journals Using Scientific Inquiry to Teach Students about Water Quality

2012 ◽  
Vol 74 (7) ◽  
pp. 503-508 ◽  
Author(s):  
Helena Puche ◽  
Jame Holt
Keyword(s):  
Water Quality ◽  
High School Students ◽  
Scientific Inquiry ◽  
Guided Inquiry ◽  
School Students ◽  
Aquatic Fauna ◽  
Different Sources ◽  
Different Levels ◽  
Macroinvertebrate Fauna ◽  
Analyze Data

This semi-guided inquiry activity explores the macroinvertebrate fauna in water sources affected by different levels of pollution. Students develop their ability to identify macroinvertebrates, compare aquatic fauna from different sources of water samples, evaluate water quality using an index, document and analyze data, raise questions and hypotheses, and discuss other possible issues that could be investigated at a later time. These sets of activities were designed for freshman high school students but are applicable to middle school students as well.

scholarly journals Occurrence of red tides in Lake Nakaumi related to annual variation in water quality and C:N:P ratio of phytoplankton

2004 ◽  
Vol 65 (2) ◽  
pp. 69-82 ◽  
Author(s):  
Kenji KATO ◽  
Toshiyuki GODO ◽  
Akihiko KAGEYAMA ◽  
Ryo ASHIYA ◽  
Koji MISHIMA ◽  
...  
Keyword(s):  
Water Quality ◽  
Annual Variation ◽  
Red Tides ◽  
Lake Nakaumi ◽  
C:N:P Ratio

scholarly journals Impact of Anthropic Pressure on the Quality and Diversity of Groundwater in the Region of Sighus Oum-El-Bouaghi and El Rahmounia, Algeria.

2020 ◽  
Vol 7 (3) ◽  
pp. 85-105
Author(s):  
HADJAB RAMZI ◽  
KHAMMAR HICHEM ◽  
REDJAIMIA LYLIA ◽  
MERZOUG DJEMOI ◽  
SAHEB MENOUAR
Keyword(s):  
Water Quality ◽  
Human Activity ◽  
Arid Regions ◽  
The Other ◽  
Aquatic Fauna ◽  
North Eastern ◽  
Eastern Algeria ◽  
The Relationship ◽  
Semi Arid ◽  
Anthropic Pressure

Groundwater of Oum-El-Bouaghi and its surroundings hosts a variety of microflora and fauna. This study investigated the relationship between the effect of human activity and the biodiversity and distribution of aquatic fauna in two semi-arid regions Sighus region (Oum-El-Bouaghi) and El Rahmouni (Constantine) in north-eastern Algeria. Fourteen wells and six springs were studied in two hydrographic basins, that of Constantine and Seybouse Melegue. Significant differences were revealed between the wells and springs in the two watersheds, making it possible to distinguish four groups of wells and two groups of springs. The overall faunal richness of the stations appeared to be weakly correlated with water quality, but on the other hand, the specific richness of the stygoby fauna, and even more so the abundance of stygoby species, decreased when water quality deteriorated.

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