Author: Natasa Zugic-Drakulic
Publisher:
ISBN: 9780494218723
Category :
Languages : en
Pages : 494
Book Description
Diatom and environmental data collected from the rivers in the Greater Toronto Area (GTA) were analyzed using various multivariate ordination and weighted averaging methods. A regional calibration set was based on the 280 samples collected from 42 sites of the Humber River on a monthly basis over a one-year period. Canonical Correspondence Analysis (CCA) showed that the first two axes were correlated with specific conductivity and temperature, suggesting that both spatial and temporal patterns were important. Specific conductivity was the most important variable and a diatom inference model was developed for this variable using the simple weighted average method with inverse de-shrinking. Subsequently, diatoms from five selected sites each belonging to one of five different land use categories and sampled over a 12-month period, were analyzed for temporal variations. Each land use site supported different diatom species, some of which further showed different seasonal changes. More polluted sites exhibited more distinct seasonal patterns, while less polluted sites showed less pronounced seasonal variability. For sites where seasonal variation was pronounced, distinct differentiation was found between winter and spring samples and summer and fall samples. Therefore it can be recommended to sample more than once per year, or to develop different diatom indices depending on the season. Despite the high seasonal variation in some sites, differences in overall diatom assemblages between more polluted and less polluted sites remained distinct, indicating that diatoms can be used as a powerful biomonitoring tool. The influence of substratum type on diatom composition and abundances was also tested by comparing pairs of rock and sand samples collected from 73 monitoring stations along six watersheds of the GTA. Results show that rocks and sand samples support similar diatom assemblages, with comparable species richness and diversity as well as growth forms. Correspondence Analysis (CA) did not show any separation between diatom assemblages from the two substrata, and CCA showed that the two assemblages not only have similar patterns in diatom distribution but are also controlled by the same environmental variables, suggesting that in river stretches where a preferred substratum is not present, the second choice substratum can be used.
Use of Diatom Algae as Biological Indicators for Assessing and Monitoring Water Quality of the Rivers in the Greater Toronto Area, Canada
Author: Natasa Zugic-Drakulic
Publisher:
ISBN: 9780494218723
Category :
Languages : en
Pages : 494
Book Description
Diatom and environmental data collected from the rivers in the Greater Toronto Area (GTA) were analyzed using various multivariate ordination and weighted averaging methods. A regional calibration set was based on the 280 samples collected from 42 sites of the Humber River on a monthly basis over a one-year period. Canonical Correspondence Analysis (CCA) showed that the first two axes were correlated with specific conductivity and temperature, suggesting that both spatial and temporal patterns were important. Specific conductivity was the most important variable and a diatom inference model was developed for this variable using the simple weighted average method with inverse de-shrinking. Subsequently, diatoms from five selected sites each belonging to one of five different land use categories and sampled over a 12-month period, were analyzed for temporal variations. Each land use site supported different diatom species, some of which further showed different seasonal changes. More polluted sites exhibited more distinct seasonal patterns, while less polluted sites showed less pronounced seasonal variability. For sites where seasonal variation was pronounced, distinct differentiation was found between winter and spring samples and summer and fall samples. Therefore it can be recommended to sample more than once per year, or to develop different diatom indices depending on the season. Despite the high seasonal variation in some sites, differences in overall diatom assemblages between more polluted and less polluted sites remained distinct, indicating that diatoms can be used as a powerful biomonitoring tool. The influence of substratum type on diatom composition and abundances was also tested by comparing pairs of rock and sand samples collected from 73 monitoring stations along six watersheds of the GTA. Results show that rocks and sand samples support similar diatom assemblages, with comparable species richness and diversity as well as growth forms. Correspondence Analysis (CA) did not show any separation between diatom assemblages from the two substrata, and CCA showed that the two assemblages not only have similar patterns in diatom distribution but are also controlled by the same environmental variables, suggesting that in river stretches where a preferred substratum is not present, the second choice substratum can be used.
Publisher:
ISBN: 9780494218723
Category :
Languages : en
Pages : 494
Book Description
Diatom and environmental data collected from the rivers in the Greater Toronto Area (GTA) were analyzed using various multivariate ordination and weighted averaging methods. A regional calibration set was based on the 280 samples collected from 42 sites of the Humber River on a monthly basis over a one-year period. Canonical Correspondence Analysis (CCA) showed that the first two axes were correlated with specific conductivity and temperature, suggesting that both spatial and temporal patterns were important. Specific conductivity was the most important variable and a diatom inference model was developed for this variable using the simple weighted average method with inverse de-shrinking. Subsequently, diatoms from five selected sites each belonging to one of five different land use categories and sampled over a 12-month period, were analyzed for temporal variations. Each land use site supported different diatom species, some of which further showed different seasonal changes. More polluted sites exhibited more distinct seasonal patterns, while less polluted sites showed less pronounced seasonal variability. For sites where seasonal variation was pronounced, distinct differentiation was found between winter and spring samples and summer and fall samples. Therefore it can be recommended to sample more than once per year, or to develop different diatom indices depending on the season. Despite the high seasonal variation in some sites, differences in overall diatom assemblages between more polluted and less polluted sites remained distinct, indicating that diatoms can be used as a powerful biomonitoring tool. The influence of substratum type on diatom composition and abundances was also tested by comparing pairs of rock and sand samples collected from 73 monitoring stations along six watersheds of the GTA. Results show that rocks and sand samples support similar diatom assemblages, with comparable species richness and diversity as well as growth forms. Correspondence Analysis (CA) did not show any separation between diatom assemblages from the two substrata, and CCA showed that the two assemblages not only have similar patterns in diatom distribution but are also controlled by the same environmental variables, suggesting that in river stretches where a preferred substratum is not present, the second choice substratum can be used.
Use of Diatom Algae as Biological Indicators for Assessing and Monitoring Water Quality of the Greater Toronto Area, Canada
Author: Natasa Zugic-Drakulic
Publisher:
ISBN:
Category :
Languages : en
Pages : 494
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 494
Book Description
Water Quality Assessments
Author: Deborah V Chapman
Publisher: CRC Press
ISBN: 0419215905
Category : Science
Languages : en
Pages : 658
Book Description
This guidebook, now thoroughly updated and revised in its second edition, gives comprehensive advice on the designing and setting up of monitoring programmes for the purpose of providing valid data for water quality assessments in all types of freshwater bodies. It is clearly and concisely written in order to provide the essential information for all agencies and individuals responsible for the water quality.
Publisher: CRC Press
ISBN: 0419215905
Category : Science
Languages : en
Pages : 658
Book Description
This guidebook, now thoroughly updated and revised in its second edition, gives comprehensive advice on the designing and setting up of monitoring programmes for the purpose of providing valid data for water quality assessments in all types of freshwater bodies. It is clearly and concisely written in order to provide the essential information for all agencies and individuals responsible for the water quality.
Dissertation Abstracts International
Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 924
Book Description
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 924
Book Description
Detection Methods for Algae, Protozoa and Helminths in Fresh and Drinking Water
Author: Franca Palumbo
Publisher: John Wiley & Sons
ISBN: 0470511117
Category : Science
Languages : en
Pages : 246
Book Description
This is the second book in the Water Quality Measurement Series. Itfocuses on the analytical aspects related to epidemiology,toxicology, sanitary, engineering and plant technology to providean integrated and clear strategy for carrying out surveillance,quality control, prevention and remedial measures. * Contains a significant number of tables, figures, colour andblack and white photographs and spectra * Offers workable answers to specific practical issues using acomprehensive and scientifically sound approach
Publisher: John Wiley & Sons
ISBN: 0470511117
Category : Science
Languages : en
Pages : 246
Book Description
This is the second book in the Water Quality Measurement Series. Itfocuses on the analytical aspects related to epidemiology,toxicology, sanitary, engineering and plant technology to providean integrated and clear strategy for carrying out surveillance,quality control, prevention and remedial measures. * Contains a significant number of tables, figures, colour andblack and white photographs and spectra * Offers workable answers to specific practical issues using acomprehensive and scientifically sound approach
Evaluation of the Applicability of Diatom Based Indices as Bioindicators of Water Quality in South African Rivers
Author: Pieter Arno De la Rey
Publisher:
ISBN:
Category :
Languages : en
Pages : 510
Book Description
Diatoms -- Bacillariophyceae -- Bioindicators -- SASS 5 -- Species diversity indices -- Water quality -- Aut-ecological indices -- Diatome -- Bioindikatore -- Diversiteitsindekse -- Waterkwaliteit -- Out-ekologiese indekse.
Publisher:
ISBN:
Category :
Languages : en
Pages : 510
Book Description
Diatoms -- Bacillariophyceae -- Bioindicators -- SASS 5 -- Species diversity indices -- Water quality -- Aut-ecological indices -- Diatome -- Bioindikatore -- Diversiteitsindekse -- Waterkwaliteit -- Out-ekologiese indekse.
Methods and Measurements of Periphyton Communities
Author: R. L. Weitzel
Publisher: ASTM International
ISBN: 9780803105126
Category : Science
Languages : en
Pages : 196
Book Description
Publisher: ASTM International
ISBN: 9780803105126
Category : Science
Languages : en
Pages : 196
Book Description
Use of Algae, Especially Diatoms in the Assessment of Water Quality
Proceedings of the Seventeenth International Diatom Symposium
Author: Michel Poulin
Publisher:
ISBN:
Category : Diatoms
Languages : en
Pages : 500
Book Description
Publisher:
ISBN:
Category : Diatoms
Languages : en
Pages : 500
Book Description
Handbook of Ecological Indicators for Assessment of Ecosystem Health
Author: Sven E. Jorgensen
Publisher: CRC Press
ISBN: 9780203490181
Category : Technology & Engineering
Languages : en
Pages : 472
Book Description
The field of ecosystem health explores the interactions between natural systems, human health, and social organization. As decision makers require a sound, modular approach to environmental management and sustainable development, ecosystem health assessment indicators are increasingly used across any number of applications. The Handbook of Ecologic
Publisher: CRC Press
ISBN: 9780203490181
Category : Technology & Engineering
Languages : en
Pages : 472
Book Description
The field of ecosystem health explores the interactions between natural systems, human health, and social organization. As decision makers require a sound, modular approach to environmental management and sustainable development, ecosystem health assessment indicators are increasingly used across any number of applications. The Handbook of Ecologic