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Articles 1 - 4 of 4
Full-Text Articles in Entire DC Network
Gene Expression In Two Cyanobacteria, Freshwater Synechococcus Sp. Pcc 7942 And Oceanic Synechococcus Sp. Wh 7803, In Response To Ammonium, Nitrate Or Iron, Abbas Sadeghi
Dissertations and Theses
The transcriptional response of freshwater Synechococcus sp. PCC 7942 and oceanic Synechococcus sp. WH 7803 to ammonium, nitrate or iron was studied in single or multiple factor limited cultures. Both strains showed maximum production of NiR mRNA when grown in nitrate-containing media. When grown in ammonium-containing medium, they did not show any signal for NiR mRNA synthesis. The influence on the transcription of NiR mRNA by iron as sole limiting nutrient was also evaluated. Iron increased the NiR mRNA whether or not the positive effect of nitrate was already present. The hybridization signal of mRNA for the large subunit of …
Enculturing Nature, William Lloyd Cornett
Enculturing Nature, William Lloyd Cornett
Dissertations and Theses
Human activity is embedded within a myriad of seldom-acknowledged ecological relationships. Anthropology and ecology, two holistic disciplines concerned with these activities, struggle with the topic of human/nature relationships because both are grounded within larger western discourses separating human behaviors from those of the natural world. This thesis examines the histories of anthropology and ecology in the 20th Century, and the effect these disciplines have had upon the formulation of contemporary urban worldviews that are based upon the separation of humans from nature.
Ecology, Wilderness Selection, And The Salmonhuckleberry Roadless Area, Jason Scot Barker
Ecology, Wilderness Selection, And The Salmonhuckleberry Roadless Area, Jason Scot Barker
Dissertations and Theses
In the 1970s, the Forest Service used ecology in the process that led to the SalmonHuckleberry roadless area in the Mount Hood National Forest becoming a Congressionally designated Wilderness in 1984. This case study of the history of SalmonHuckleberry roadless area confirms the criticism made by environmentalists that noncommercial forest values have received much less priority than commercial uses in forest planning during the late 1960s and 1970s. This study of the area also reveals that the Forest Service's planning process was fundamentally flawed because Forest Service planners often lacked scientific data to support management decisions and downplayed the sigificnace …
An Ecology Problem Book, Marc Mangel, Paul Switzer, Sarah M. Eppley
An Ecology Problem Book, Marc Mangel, Paul Switzer, Sarah M. Eppley
Biology Faculty Publications and Presentations
This problem book has many objectives:
- To get you to think about the course each night: do not wait until the last minute to begin working on the problems.
- To get you to deal with data. Statistics courses that you take in the future will be more meaningful once you understand the kinds of data that arise in ecological studies.
- To get you to be more comfortable with theoretical and quantitative methods. Not every ecologist uses those methods, but one should not be put off by them.
- To familiarize you with material as it appears in the professional literature.