Institution
Sewanee: The University of the South
Education•Sewanee, Tennessee, United States•
About: Sewanee: The University of the South is a education organization based out in Sewanee, Tennessee, United States. It is known for research contribution in the topics: Population & Species richness. The organization has 8995 authors who have published 14790 publications receiving 320138 citations. The organization is also known as: Sewanee & The University of the South.
Papers published on a yearly basis
Papers
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TL;DR: The ability to impair female reproduction at very low concentrations makes the progestins arguably the most important pharmaceutical group of concern after ethinylestradiol.
Abstract: Around 20 progestins (also called gestagens, progestogens, or progestagens) are used today in assisting a range of medical conditions from endometrial cancer to uterine bleeding and as an important component of oral contraception. These progestins can bind to a wide range of receptors including progestin, estrogen, androgen, glucocorticoid, and mineralocorticoid receptor, as well as sex hormone and corticosteroid binding globulins. It appears that only five of these (four synthetic and one natural) progestins have so far been studied in sewage effluent and surface waters. Analysis has reported values as either nondetects or low nanograms per liter in rivers. Seven of the progestins have been examined for their effects on aquatic vertebrates (fish and frogs). The greatest concern is associated with levonorgestrel, norethisterone, and gestodene and their ability to reduce egg production in fish at levels of 0.8–1.0 ng/L. The lack of environmental measurements, and some of the contradictions in existing valu...
136 citations
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TL;DR: A total of 18 organosulfur compounds originating from Petiveria alliacea L. roots have been tested for their antibacterial and antifungal activities, with the benzyl-containing thiosulfinates exhibiting the broadest spectrum of antimicrobial activity.
136 citations
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TL;DR: The evolution of a clade within Fusarium associated with ambrosia beetles in the genus Euwallacea is document, consistent with a strong evolutionary trend toward obligate symbiosis coupled with secondary contact and interspecific hybridization.
136 citations
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TL;DR: This experiment suggests that host plants and natural enemies may represent opposing forces of selection, and leafminers adapted to individual trees may realize a selective advantage only when natural‐enemy densities are low.
Abstract: The deme-formation hypothesis states that selection can produce adaptive genetic variation within and among phytophagous insect populations. We conducted three field experiments and tested this prediction by transferring eggs and measuring performance of a mobile leafmining insect, Stilbosis quadricustatella. In Experiment 1, we com- pared the rate of mine initiation of leafminers transferred to natal and novel sites. In Experiment 2, we compared mine-initiation rate of leafminers transferred to natal and novel host-plant species. In Experiment 3, we compared the mine-initiation rate, mine-completion rate, and sources of mortality of miners transferred to neighboring natal and novel Quercus geminata trees. In the first, second, and third experiments, leafminer larvae initiated significantly more mines at the natal site, on the natal plant species, and on the natal Q. geminata tree, evidence for adaptive differentiation. Furthermore, plant-mediated mortality was significantly lower among miners transferred to natal Q. geminata trees. This result supports a key assumption of the deme-formation hypothesis: insects adapt to the defensive phenotypes of individual trees. However, natural-enemy mortality was significantly higher among miners transferred to natal trees, essentially reversing the plant effect. Therefore, rates of successful mine completion were similar on natal (19%) and novel (17%) trees. This experiment suggests that host plants and natural enemies may represent opposing forces of selection. Leafminers adapted to individual trees may realize a selective advantage only when natural-enemy densities are low.
136 citations
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TL;DR: It is concluded that the sudden shifts that violate the established balance between bacterial production and the protist-induced bacterial mortality led to the significant shifts in cell morphology and BCC.
Abstract: Using oligonucleotide probes for Eubacteria and four eubacterial subgroups, we monitored changes in bacterial community composition (BCC) with different degrees of grazing pressure, as follows: unfiltered water (UNF, all bacterivores present); 4 μm) increased in treatments that yielded large increases in bacterivory. Filament formation also showed season-specific features; in experiment I, all filaments belonged into ALF, whereas in experiment II, most of them hybridized with the C/F probe. We conclude that the sudden shifts that violate the established balance between bacterial production and the protist-induced bacterial mortality led to the significant shifts in cell morphology and BCC.
135 citations
Authors
Showing all 9016 results
Name | H-index | Papers | Citations |
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Marc Humbert | 149 | 1184 | 100577 |
Vladimir N. Uversky | 131 | 959 | 75342 |
Edward L. Deci | 130 | 284 | 206930 |
Andrew J.S. Coats | 127 | 820 | 94490 |
Paul M. Vanhoutte | 127 | 868 | 62177 |
Yusuf A. Hannun | 126 | 589 | 62729 |
Anthony Howell | 120 | 714 | 55075 |
David C. Baulcombe | 110 | 287 | 50828 |
Petr Pyšek | 110 | 523 | 54926 |
Allen N. Berger | 106 | 382 | 65596 |
Mark S. George | 106 | 592 | 39480 |
John C. Avise | 105 | 413 | 53088 |
Peter Riederer | 104 | 565 | 42472 |
Xiaodong Li | 104 | 1300 | 49024 |
Stuart J. H. Biddle | 102 | 484 | 41251 |