Author: Christopher M. LanePublisher:
ISBN:
Category : Water quality biological assessment
Languages : en
Pages : 344
Book Description
The Use of Diatoms as Biological Indicators of Water Quality, and for Environmental Reconstruction, in South-east Tasmania, Australia
Author: Christopher M. LanePublisher:
ISBN:
Category : Water quality biological assessment
Languages : en
Pages : 344
Book Description
The Use of Diatoms as Biological Indicators of Water Quality in Two Coastal Dune Lakes, Northern New South Wales
Author: Christopher LanePublisher:
ISBN:
Category : Diatoms
Languages : en
Pages : 124
Book Description
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-DrakulicPublisher:
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.
The Diatoms
Author: John P. SmolPublisher: Cambridge University Press
ISBN: 1139492624
Category : Science
Languages : en
Pages : 687
Book Description
This much revised and expanded edition provides a valuable and detailed summary of the many uses of diatoms in a wide range of applications in the environmental and earth sciences. Particular emphasis is placed on the use of diatoms in analysing ecological problems related to climate change, acidification, eutrophication, and other pollution issues. The chapters are divided into sections for easy reference, with separate sections covering indicators in different aquatic environments. A final section explores diatom use in other fields of study such as forensics, oil and gas exploration, nanotechnology, and archaeology. Sixteen new chapters have been added since the first edition, including introductory chapters on diatom biology and the numerical approaches used by diatomists. The extensive glossary has also been expanded and now includes over 1,000 detailed entries, which will help non-specialists to use the book effectively.
Diatoms from Tasmanian Mountain Lakes
Author: Wim VyvermanPublisher: Gebruder Borntraeger Verlagsbuchhandlung
ISBN:
Category : Nature
Languages : en
Pages : 204
Book Description
Diatoms as Indicators of Water Quality in the Wetlands of the Swan Coastal Plain, Western Australia
Author: Stuart K. R. HellerenPublisher:
ISBN:
Category : Diatoms
Languages : en
Pages : 438
Book Description
Environmental Requirements and Pollution Tolerance of Freshwater Diatoms
Author: Rex L. LowePublisher:
ISBN:
Category : Diatoms
Languages : en
Pages : 344
Book Description
Data on the environmental requirements and pollution tolerance of 300 common species and varieties of fresh water diatoms was compiled from 48 references. The following parameters were considered: pH, nutrients, salinity, organic pollution tolerance (sapobrien system), current, general habitat, specific habitat, seasonal distribution, temperature and geographical distribution. A consensus of opinions for each parameter was established for most taxa. It is suggested that this compilation be employed to evaluate data from plankton and periphyton samples collected for the assessment of water quality.
Twelfth International Diatom Symposium
Author: Herman van DamPublisher: Springer
ISBN: 9789048143245
Category : Science
Languages : en
Pages : 0
Book Description
The Twelfth International Diatom Symposium stressed how diatoms can be used to assess the human impact on natural waters, without neglecting other important fields of research. As the frustules of many diatom species are relatively resistant to dissolution they are preserved in freshwater and marine sediments and provide a record of past environments on earth. In past decades they have been successfully used to reconstruct changes in water bodies evoked by changes in salinity, acidification and eutrophication. In the last few years diatom-inferred predictions of environmental variables have become much more quantitative. In the most recent research reports the strong separation between palaeolimnological and neolimnological diatom research is fading, as palaeolimnologists are increasingly using modern calibration sets to infer past states of the environment. This quantitative approach is also very suitable for prediction of future changes in the biota of surface waters. Also ecological changes due to climatic modification have been investigated more thoroughly recently. A very important new research topic is the occurrence of toxic diatoms, particularly along the coasts of North America. These proceedings are intended to be a balanced view of such modern developments in diatom research. They should also be of interest to non-specialists in diatoms, who can use the results of diatom research as a tool in a more general taxonomic, ecological and geological context.
Ecological Water Quality
Author: VoudourisPublisher: IntechOpen
ISBN: 9789535105084
Category : Science
Languages : en
Pages : 510
Book Description
This book attempts to cover various issues of water quality in the fields of Hydroecology and Hydrobiology and present various Water Treatment Technologies. Sustainable choices of water use that prevent water quality problems aiming at the protection of available water resources and the enhancement of the aquatic ecosystems should be our main target.
Diatom Flora of Australia. Volume 1
Author: Jacob JohnPublisher:
ISBN: 9783946583035
Category :
Languages : en
Pages :
Book Description