Order ID:89JHGSJE83839 | Style:APA/MLA/Harvard/Chicago | Pages:5-10 |
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Various Kinds of Freshwater Cyanobacteria Articles Discussion
Several coastal areas of Florida has been impacted by major algae blooms in recent years. Some of these blooms are caused by various kinds of freshwater cyanobacteria, often referred to as blue-green algae. In addition, several coastal areas of southwest Florida, the panhandle, and, most recently, southwest Florida have been impacted by “red tides”, which in Florida area usually associated with a marine dinoflagellate called Karenia brevis.
While the two types of algae blooms are quite different in how and where they form, both cause significant environmental harm – including large fish kills. Toxins from Karenia brevis and certain kinds of freshwater cyanobacteria, particularly Microcystis and Anabaena species, can also have adverse impacts on human health.
Media and public discussions about these algal blooms have often been quite contentious, confusing, and, in some cases, outright wrong. Leading scientists have therefore attempted to communicate scientific knowledge directly to the public. For this discussion board exercise, you will think carefully about the (somewhat different!) thoughts of two well-respected scientific researchers:
After reading both of these articles, answer the following three questions:
Various Kinds of Freshwater Cyanobacteria Articles Discussion
1) Based on what you have learned so far about the typical limiting nutrient in freshwater ecosystems (and, yes, Lake Okeechobee is freshwater), what nutrient would you generally expect to be the most likely limiting resource for Lake Okeechobee?
2) How do Crosby and Havens each describe the role of nutrient contamination, particularly phosphorus and nitrogen, in initiating freshwater cyanobacteria (aka, blue-green algae blooms) blooms in Lake Okeechobee? What other factors do either of these researchers cite as a potential “trigger” for the cyanobacteria blooms to form in Lake Okeechobee?
3) Based on your reading of both Crosby and Havens (as well as any materials from lecture or other sources), describe why and how severe freshwater cyanobacteria blooms frequently occur in normally brackish ecosystems like the St. Lucie River estuary (on the east coast) and Caloosahatchee River estuary (on the west coast). (Hint – freshwater cyanobacteria normally would not survive in a saltwater estuary environment.)
Various Kinds of Freshwater Cyanobacteria Articles Discussion
RUBRIC |
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Excellent Quality 95-100%
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Introduction
45-41 points The background and significance of the problem and a clear statement of the research purpose is provided. The search history is mentioned. |
Literature Support 91-84 points The background and significance of the problem and a clear statement of the research purpose is provided. The search history is mentioned. |
Methodology 58-53 points Content is well-organized with headings for each slide and bulleted lists to group related material as needed. Use of font, color, graphics, effects, etc. to enhance readability and presentation content is excellent. Length requirements of 10 slides/pages or less is met. |
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Average Score 50-85% |
40-38 points More depth/detail for the background and significance is needed, or the research detail is not clear. No search history information is provided. |
83-76 points Review of relevant theoretical literature is evident, but there is little integration of studies into concepts related to problem. Review is partially focused and organized. Supporting and opposing research are included. Summary of information presented is included. Conclusion may not contain a biblical integration. |
52-49 points Content is somewhat organized, but no structure is apparent. The use of font, color, graphics, effects, etc. is occasionally detracting to the presentation content. Length requirements may not be met. |
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Poor Quality 0-45% |
37-1 points The background and/or significance are missing. No search history information is provided. |
75-1 points Review of relevant theoretical literature is evident, but there is no integration of studies into concepts related to problem. Review is partially focused and organized. Supporting and opposing research are not included in the summary of information presented. Conclusion does not contain a biblical integration. |
48-1 points There is no clear or logical organizational structure. No logical sequence is apparent. The use of font, color, graphics, effects etc. is often detracting to the presentation content. Length requirements may not be met |
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Various Kinds of Freshwater Cyanobacteria Articles Discussion |
Various Kinds of Freshwater Cyanobacteria Articles Discussion