Difference between revisions of "Karst Springs"
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Revision as of 01:13, 12 April 2010
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Legend/credit: Electron micrograph of the Ebola Zaire virus. This was the first photo ever taken of the virus, on 10/13/1976. By Dr. F.A. Murphy, now at U.C. Davis, then at the CDC.
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- 1 Introduction
- 2 Physical environment
- 3 Biological interactions
- 4 Microbial processes
- 5 Key Microorganisms
- 6 Examples of organisms within the group
- 7 Current Research
- 8 Resources
- 9 References
A Karst topography is formed when rock is dissolved, causing small fissures within the geologic structure. This soluble rock material is often limestone, dolomite, or gypsum. This caustic solution creates sinkholes in the soil surface and as it digs further into the rock, can create underground caverns and passageways. This allows precipitation and surface runoff to penetrate the soil horizons and fill subterranean caverns. This water can be held within the underground caverns, or exit though hydric tunnels. Karst springs are formed when water exits the subterranean matrix (though eroded tunnels) and forms surface pools.
This template gives you a general idea of the layout of your page. You are not completely restricted to this format, so feel free to try out different things. I'll give you feedback as you work on your pages. Make sure to copy the "code" of this page to your own page before editing. -Prof Kent
In the introduction, briefly describe the habitat that is the topic of this page. Introduce the habitat, its ecological significance, and the importance of microorganisms in this environment. (What processes do they carry out? What functions do they perform?)
The formation of the karst topography begins with the "carbon dioxide cascade. Rainfall absorbs CO2 from the atmosphere during droplet formation, while it falls as precipitation, or as it moves through the soil horizons. This forms carbonic acid (H2CO3).
H2O + CO2= H2CO3
As the acid comes in contact with the alkaline rock the two react, forming an aqueous solution that will further dissolve small channels within the soil. Slowly over decades channels will expand allowing larger volumes of water to pass through it.
Describe the physical and chemical characteristics of the environment, using as many sections/subsections as you require. Look at other topics available in MicrobeWiki. Which involve processes similar to yours? Create links where relevant.
Are there important biological interactions that are important in this environment? Do these interactions influence microbial populations and their activities? How do these interactions influence other organisms? Describe biological interactions that might take place in this environment, using as many sections/subsections as you require. Look at other topics available in MicrobeWiki. Create links where relevant.
What microbial processes define this environment? Describe microbial processes that are important in this habitat, adding sections/subsections as needed. Look at other topics in MicrobeWiki. Are some of these processes already described? Create links where relevant.
Actinomycetes- Responsible for odor of caves widespread due to lower temps and high humidity. found as specks in limestone. -Streptomycetes and nocardia
Nitrosomas and nitrobacter Leptothrix, Gallionella, Clonothrix
Thiobacillus, Beggiatoa, Thiothrix
Cyanobacteria: Geitleria calcarea, Scytonema julianum
Oscillatoria, Phormidium, Gleocapsa, and Lyngbya
What kind of microbes do we typically find in this environment? Or associated with important processes in this environment? Describe key groups of microbes that we find in this environment, and any special adaptations they may have evolved to survive in this environment. Add sections/subsections as needed. Look at other microbe listings in MicrobeWiki. Are some of the groups of microbes from your environment already described? Create links to those pages. Specific microbial populations will be included in the next section.
Examples of organisms within the group
List examples of specific microbes that represent key groups or are associated with important processes found in this environment. Link to other MicrobeWiki pages where possible.
Enter summaries of recent research here--at least three required
[Sample reference] Takai, K., Sugai, A., Itoh, T., and Horikoshi, K. "Palaeococcus ferrophilus gen. nov., sp. nov., a barophilic, hyperthermophilic archaeon from a deep-sea hydrothermal vent chimney". International Journal of Systematic and Evolutionary Microbiology. 2000. Volume 50. p. 489-500.
Picture references: 1. International Association of Hydrogeologists http://www.iah.org/karst/karst_hydrogeology.html
Edited by Benjamin Miller: student of Angela Kent at the University of Illinois at Urbana-Champaign.