Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Bacillariophyceae (1)
- Calidad del agua (1)
- Chlorophylls (1)
- Chlorophyta (1)
- Cryptophyta (1)
-
- Cyanobacteria (1)
- Cyanophyta (1)
- Denitrification (1)
- Diatoms (1)
- Dioxide (1)
- Ditches (1)
- Emissions (1)
- Fitoplancton (1)
- Freshwater (1)
- Lac (1)
- Lagos (1)
- Lake water (1)
- Lakes (1)
- Marecage (1)
- Nitrate (1)
- Nitrification (1)
- Nitrifying bacteria (1)
- Nitrite (1)
- Nitrous oxide production (1)
- Pantano (1)
- Phytoplancton (1)
- Phytoplankton (1)
- Qualitie de l'eau (1)
- Reduction (1)
- Soil (1)
Articles 1 - 2 of 2
Full-Text Articles in Physical Sciences and Mathematics
A Comparison Of No And N20 Production By The Autophic Nitrifier Nitrosomonas Europaea And The Heterotrophic Nitrifier Alcaligenes Faecalis, Iris C. Anderson, Mark Poth, Julie Homstead, David J. Burdige
A Comparison Of No And N20 Production By The Autophic Nitrifier Nitrosomonas Europaea And The Heterotrophic Nitrifier Alcaligenes Faecalis, Iris C. Anderson, Mark Poth, Julie Homstead, David J. Burdige
OES Faculty Publications
Soil microorganisms are important sources of the nitrogen trace gases NO and N2O for the atmosphere. Present evidence suggests that autotrophic nitrifiers such as Nitrosomonas europaea are the primary producers of NO and N2O in aerobic soils, whereas denitrifiers such as Pseudomonas spp. or Alcaligenes spp. are responsible for most of the NO and N2O emissions from anaerobic soils. It has been shown that Alcaligenes faecalis, a bacterium common in both soil and water, is capable of concomitant heterotrophic nitrification and denitrification. This study was undertaken to determine whether heterotrophic nitrification might be …
Phytoplankton Relationships To Water Quality In Lake Drummond And Two Drainage Ditches, Christine G. Phillips, Harold G. Marshall
Phytoplankton Relationships To Water Quality In Lake Drummond And Two Drainage Ditches, Christine G. Phillips, Harold G. Marshall
Biological Sciences Faculty Publications
A twelve-month phytoplankton study was conducted in Lake Drummond and Washington and Jericho Ditches from December 1988 to November 1989. Four dominant phytoplankton groups were identified at these sites. These were the Bacillariophyceae, Cyanophyceae, Cryptophyceae and an autotrophic picoplankton component. Over the past 20 years there has been a decrease in the mean pH levels of Lake Drummond and the replacement of one its former major components, the Chlorophyceae, by the Cyanophyceae. Based on water quality analysis results and species diversity indices, Lake Drummond is classified as in an early eutrophic stage of development.