The Role of Benthic Algae in Estuarine Pollution Assessment

1985 ◽  
pp. 71-81 ◽  
Author(s):  
Martin Wilkinson ◽  
David A. Rendall
Keyword(s):  
Pollution Assessment ◽  
Benthic Algae ◽  
Estuarine Pollution

The role of fish studies in estuarine pollution assessment

1988 ◽  
Vol 33 (sa) ◽  
pp. 51-61 ◽  
Author(s):  
M. Elliott ◽  
A. H. Griffiths ◽  
C. J. L. Taylor
Keyword(s):  
Pollution Assessment ◽  
Estuarine Pollution

scholarly journals Qualitative and Quantitative study of Epipelic algae in Tigris River within Baghdad City, Iraq

2014 ◽  
Vol 11 (3) ◽  
pp. 1074-1082
Author(s):  
Baghdad Science Journal
Keyword(s):  
Benthic Algae ◽  
Lotic Ecosystems ◽  
Qualitative And Quantitative ◽  
Tigris River ◽  
Spatial And Temporal Distributions ◽  
Number Species ◽  
Study Sites ◽  
One Year ◽  
Qualitative And Quantitative Study

The present study conducted to study epipelic algae in the Tigris River within Baghdad city for one year from September 2011 to August 2012 due to the importance role of benthic algae in lotic ecosystems. Five sites have been chosen along the river. A total of 154 species of epipelic algae was recorded belongs to 45 genera, where Bacillariophyceae (Diatoms) was the dominant groups followed by Cyanophyceae and Chlorophyceae. The numbers of common types in three sites were 47 species. Bacillariophyceae accounted 88.31% of the total number of epipelic algae, followed by Cyanophyceae 7.14 % and Chlorophyceae 4.55%. A 85 species (29 genera) recorded in site 1, 103 species (34 genera) in site2, 112 species (35 genera) in site3, 96 species (32 genera) in site4, and 85 species (29 genera) in site5. Spatial and temporal distributions of epipelic algae were noticed in this study. The higher total number of epipelic algae (91504.01cell cm-2) was recorded at site 5 in spring 2012, while the lower was (37017.98cell cm-2) in summer 2012 at site1. Some genera have recorded higher number species during the study period; these genera were Nitzschia, Navicula, Cymbella, Gomphonema, Synedra, Achnanthes, Oscillatoria, and Lyngbya. The study revealed that Bacillariophyceae were more prominent within all study sites and followed by Cyanophyceae, while a few numbers of Chlorophyceae was appeared.

NUTRIENT LIMITATION OF BENTHIC ALGAE IN LAKE MICHIGAN: THE ROLE OF SILICA

2007 ◽  
Vol 43 (2) ◽  
pp. 228-234 ◽  
Author(s):  
Hunter J. Carrick ◽  
Rex L. Lowe
Keyword(s):  
Nutrient Limitation ◽  
Lake Michigan ◽  
Benthic Algae

Biological Effects and Pollution Assessment

1986 ◽  
Vol 18 (4-5) ◽  
pp. 155-160 ◽  
Author(s):  
A. D. McIntyre
Keyword(s):  
Coastal Waters ◽  
Hot Spots ◽  
Biological Effects ◽  
Pollution Assessment ◽  
Ecological Understanding ◽  
Low Levels

Techniques for studying biological effects of pollution in the sea are briefly reviewed and the circumstances under which they are most useful in coastal waters considered. Some approaches are particularly suitable for studying pollution hot spots, others for detecting low levels of contamination. The role of the scientist in pollution assessment is discussed and the problems caused by lack of ecological understanding highlighted.

The potential role of the estuarine amphipod Gammarus duebeni in sub-lethal ecotoxicology testing

1996 ◽  
Vol 34 (7-8) ◽  
pp. 93-100 ◽  
Author(s):  
Andrew Lawrence ◽  
Carl Poulter
Keyword(s):  
Respiration Rate ◽  
Potential Role ◽  
Beat Frequency ◽  
Water And Sediment ◽  
Swimming Efficiency ◽  
Significant Impairment ◽  
Estuarine Pollution ◽  
Further Development ◽  
Copper Pollution

The aim of this study was to assess the suitability of Gammarus duebeni as an indicator of estuarine pollution. This involved the development of sub-lethal pollution bioassays monitoring respiration rate, swimming efficiency and precopula pairing; assessment of the sensitivity of the assays to copper pollution and comparison of the suitability of the assays. Significant impairment of respiration rate, as measured by changes in pleopod beat, was determined at a copper concentration of 600 μg 1−1. Significant impairment to swimming ability was determined after exposure to copper pollution at a concentration of 600 μg 1−1 and precopula pairing was significantly reduced at a concentration of 600 μg 1−1. Of the assays, swimming efficiency and pleopod beat frequency appear to offer the most potential for further development. The lower limit of sensitivity of the bioassays developed in this study is yet to be determined. However, the levels of copper shown to induce an effect can be experienced in the natural environment. The study has shown thatGammarus duebeni can be used in sub-lethal pollution assays, at relatively high Cu concentrations, and indicates that it is potentially a useful species with which to assess estuarine water and sediment pollution.

Role of residual biofilm in the recolonization of rocky intermittent streams by benthic algae

2000 ◽  
Vol 51 (7) ◽  
pp. 725 ◽  
Author(s):  
Belinda J. Robson
Keyword(s):  
Algal Growth ◽  
Benthic Algae ◽  
Algal Community ◽  
Transplant Experiment ◽  
Intermittent Streams ◽  
Naturally Occurring ◽  
Eastern Australia ◽  
Algal Biofilm ◽  
Stream Biota

Human use of stream flow for water supply may increase the duration and/or frequency of dry periods in intermittent streams, but there is little information on the effect of this change on in-stream flora or fauna. To predict the effects of dry periods on stream biota, it is necessary to understand the relative roles of various sources of recolonization. A transplant experiment was used to test the hypothesis that the dry residual algal biofilm on stones in intermittent streams is an important source of algal growth when the streams are re-wetted. Two sites were chosen, one on each of two intermittent streams in south-eastern Australia. Rocks at the sites differed in the amount of naturally occurring residual biofilm on them. Forty rocks were transplanted between the sites and counts of algal densities were made from samples taken one and five weeks after flow recommenced. At one of the sites, where the biofilm was dominated by Cyanobacteria, dry residual biofilm strongly influenced the developing algal community at both one and five weeks after flow recommenced. At the other site the influence of dry biofilm was limited after five weeks, implying that other sources of algal recolonization were influential there.

Stream Ecosystem Recovery Following a Catastrophic Debris Flow

1991 ◽  
Vol 48 (2) ◽  
pp. 196-208 ◽  
Author(s):  
Gary A. Lamberti ◽  
Stanley V. Gregory ◽  
Linda R. Ashkenas ◽  
Randall C. Wildman ◽  
Kelly M. S. Moore
Keyword(s):  
Debris Flow ◽  
Cutthroat Trout ◽  
Benthic Algae ◽  
High Irradiance ◽  
Ecosystem Recovery ◽  
Order Stream ◽  
Recovery Processes ◽  
Open Canopy

We studied recovery processes for 3 yr in Quartz Creek (Cascade Mountains, Oregon), a third-order stream catastrophically impacted by a February 1986 debris flow for which both predisturbance data and an upstream control reach were available. The debris flow altered channel geomorphology and destroyed riparian vegetation for 500 m, resulting in a reach with short, disordered channel units, low hydraulic retention, and an open canopy. High irradiance levels and reduced grazing by macroinvertebrates contributed to rapid accrual of benthic algae in the disturbed reach, which formed the bioenergetic basis for ecosystem recovery. Macroinvertebrates (mostly herbivores) recovered to upstream densities and taxonomic richness within 1 yr, although effects on community structure persisted into the second year. Cutthroat trout (Oncorhynchus clarki) populations were locally decimated by the disturbance, but by the following year, recruitment of young-of-the-year trout into the reach exceeded that of the upstream reach and populations had recovered to predisturbance densities. Despite the general rapid recovery of the biota within the disturbed reaches, most populations showed broad temporal fluctuations in abundance, suggesting that ecosystem stability was diminished by the debris flow. Long-term monitoring of Quartz Creek may yield additional insight into the role of episodic disturbance in stream ecosystems.

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