scholarly journals WATER QUALITY INFLUENCE ON MACROINVERTEBRATE COMMUNITY IN A TROPICAL ESTUARY (BUENAVENTURA BAY)

2021 ◽  
Author(s):  
Guillermo Duque ◽  
Diego Esteban Gamboa‐García ◽  
Andrés Molina ◽  
Pilar Cogua
Keyword(s):  
Water Quality ◽  
Macroinvertebrate Community ◽  
Tropical Estuary

scholarly journals New State Records and Habitat Characteristics for Kloosia Kruseman (Diptera: Chironomidae) from Wadeable Streams in Missouri

2020 ◽  
Vol 48 (2020) ◽  
pp. 1-3
Author(s):  
William R. Mabee ◽  
Brandy S. Bergthold ◽  
Carl K. Wakefield ◽  
Matthew D. Combes
Keyword(s):  
Water Quality ◽  
Quality Characteristics ◽  
Macroinvertebrate Community ◽  
Habitat Characteristics ◽  
Aquatic Macroinvertebrate ◽  
Dekalb County ◽  
Wadeable Streams ◽  
State Records

Abstract First records of occurrence of the midge genus Kloosia Kruseman in Missouri are reported based upon aquatic macroinvertebrate community samples collected during April 2012 and October 2015 from reaches of Grindstone Creek in Dekalb County and South Blackbird Creek in Schuyler County in the Central Dissected Till Plains. Select physical and water quality characteristics from the reaches are also provided.

Short-term variability of water quality and its implications on phytoplankton production in a tropical estuary (Cochin backwaters—India)

2009 ◽  
Vol 170 (1-4) ◽  
pp. 287-300 ◽  
Author(s):  
N. V. Madhu ◽  
K. K. Balachandran ◽  
G. D. Martin ◽  
R. Jyothibabu ◽  
Shoji D. Thottathil ◽  
...  
Keyword(s):  
Water Quality ◽  
Phytoplankton Production ◽  
Tropical Estuary ◽  
Short Term ◽  
Cochin Backwaters ◽  
Short Term Variability

Benthic Macroinvertebrate and Chemical Assessment of Water Quality in Relation to the Shope Creek Trout Farm

2014 ◽  
Vol 130 (3-4) ◽  
pp. 111-115
Author(s):  
Elizabeth C. Creech ◽  
Mark V. Brenner
Keyword(s):  
Water Quality ◽  
North Carolina ◽  
Rainbow Trout ◽  
Oxygen Demand ◽  
The United States ◽  
Macroinvertebrate Community ◽  
Biotic Index ◽  
Order Stream ◽  
Significant Difference ◽  
Chemical Assessment

Abstract North Carolina is the second largest commercial producer of rainbow trout, Oncorhynchus mykiss, in the United States, yet few studies have measured the effects of trout farm effluent on regional water bodies. Our objective was to assess water quality directly upstream and downstream of a low-production rainbow trout farm located on Shope Creek, a second-order stream in western North Carolina, using both biological and chemical assessment methods. Benthic macroinvertebrates were collected upstream and downstream of the trout farm annually from 2009 to 2011 using Hester-Dendy samplers. Organisms were identified to family and compared using the Family Level Biotic Index. We found no significant difference between mean upstream and downstream index values, suggesting no negative impacts of trout farm effluent on the macroinvertebrate community. Water samples were collected from each site on four days over a two month period, with three subsamples taken per site, per day. There were no significant differences between mean ammonia or phosphate levels upstream or downstream of the trout farm. While biochemical oxygen demand levels were significantly higher at the downstream site, this increase did not appear to affect the macroinvertebrate community. Between 2009 and 2011 the Shope Creek trout farm produced approximately 500 kg of fish annually. This is much lower than average annual regional trout farm production rates of 34,000 kg of fish, which likely accounts for the minimal impacts observed in this study.

scholarly journals Stilocladius (Diptera: Chironomidae): A New Midge Record for Wadeable Streams in Missouri

2010 ◽  
Vol 44-45 (2010-2011) ◽  
pp. 47-49
Author(s):  
Gregory S. Wallace ◽  
William R. Mabee ◽  
Matthew D. Combes
Keyword(s):  
Water Quality ◽  
First Record ◽  
Quality Characteristics ◽  
Macroinvertebrate Community ◽  
Aquatic Macroinvertebrate ◽  
Ozark Highlands ◽  
Wadeable Streams

Abstract We report first record on occurrence of the midge genus Stilocladius in Missouri based on aquatic macroinvertebrate community samples collected during December 2005 and January and February, 2007 from reaches of three wadeable streams in Reynolds County in the Ozark Highlands. Select water quality characteristics from the reaches are also provided.

scholarly journals Water quality impact from shrimp farming effluents in a tropical estuary

2020 ◽  
Author(s):  
E. G. Bull ◽  
C. de L. da N. Cunha ◽  
A. C. Scudelari
Keyword(s):  
Water Quality ◽  
Organic Matter ◽  
Shrimp Farming ◽  
Anthropogenic Source ◽  
Tropical Estuary ◽  
Quality Model ◽  
Management Techniques ◽  
The Impact ◽  
Shrimp Farms ◽  
Water Quality Impact

Abstract Shrimp farms cause environmental impacts in coastal ecosystems, compromising water quality by discharging effluents rich in nutrients and organic matter. The impacts of shrimp farming are often investigated by the unit effect of a farm. In this study, a harvest time series generator is used to analyze the impact of the synergistic effect of several shrimp farm harvests in a tropical estuary. Two other scenarios with harvests concentrated during spring and neap tides were also analyzed, showing waste management techniques that can reduce the impact of shrimp aquaculture on coastal areas. A hydrodynamic circulation and water quality model were implemented to evaluate the dispersion of pollutants using different discharge combinations. The harvesting scenarios were compared to a scenario without the activity. Results indicate that shrimp farming is not the main anthropogenic source of pollution in the estuary studied. There were no significant differences in the average and maximum variations in nutrient and organic matter concentrations between the different management techniques.

scholarly journals Community Analysis and Water Quality of Benthic Macroinvertebrates at Gwangseok stream in Korea

2019 ◽  
Vol 4 (1) ◽  
pp. 97-100
Author(s):  
Man Kyu Huh
Keyword(s):  
Water Quality ◽  
Benthic Macroinvertebrates ◽  
Community Analysis ◽  
Macroinvertebrate Community ◽  
Biotic Index ◽  
Benthic Macroinvertebrate ◽  
Biological Water ◽  
Evenness Indices ◽  
Biological Water Quality

The study was to investigate species composition and biological water quality of benthic macroinvertebrates among localities at Gwangseok stream, Jinhae city in Korea. The identified benthic macroinvertebrates were 781 individuals belonged to 19 species, 14 families, 8 orders, 5 classes and 3 phyla. The value of dominance index (DI) was varied from 0.184 (St. C) to 0.333 (St. A) with a mean of 0.235. DI was significantly different among the four regions. Beck-Tsuda's Biotic Index (BI) was varied from 7 (St. D) to 20 (St. C) with a mean of 14. Total ecological score of benthic macroinvertebrate community (TESB) was varied from 12 (St. D) to 38 (St. B) with a mean of 26.3. Average ecological score of benthic macroinvertebrate community (AESB) was varied from 1.714 (St. D) to 1.900 (St. B) with a mean of 1.821. Benthic macroinvertebrate index (BMI) ) was varied from 22.354 (St. A) to 26.474 (St. D) with a mean of 39.756. Shannon-Weaver index (H´) for mammals at the upper regions (St. A and St. B) was higher than those of low regions (St. C and St. D). Berger-Parker’s index (BPI) was varied from 0.218 (St.. C) to 0.346 (St. A). Richness (R1) was different from each other and R2 was not shown significant differences (p < 0.05). Evenness indices (E1-E5) for four stations were different from each other, however there were not shown significant differences (p < 0.05).

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