http://hdl.handle.net/1957/13588 2013-05-23T14:40:59Z 2013-05-23T14:40:59Z Yuichi, Suwa Norton, Jeanette M. Bollmann, Annette Klotz, Martin G. Stein, Lisa Y. Laanbroek, Hendrikus J. Arp, Daniel J. Goodwin, Lynne A. Chertkov, Olga Held, Brittany Bruce, David Detter, J. Chris Detter, Janine C. Tapia, Roxanne Han, Cliff S. http://hdl.handle.net/1957/36349 2013-01-28T17:06:27Z 2011-09-01T00:00:00Z

Genome Sequence of Nitrosomonas sp. Strain AL212, an Ammonia-Oxidizing Bacterium Sensitive to High Levels of Ammonia Yuichi, Suwa; Norton, Jeanette M.; Bollmann, Annette; Klotz, Martin G.; Stein, Lisa Y.; Laanbroek, Hendrikus J.; Arp, Daniel J.; Goodwin, Lynne A.; Chertkov, Olga; Held, Brittany; Bruce, David; Detter, J. Chris; Detter, Janine C.; Tapia, Roxanne; Han, Cliff S. Nitrosomonas sp. strain AL212 is an obligate chemolithotrophic ammonia-oxidizing bacterium (AOB) that was originally isolated in 1997 by Yuichi Suwa and colleagues. This organism belongs to Nitrosomonas cluster 6A, which is characterized by sensitivity to high ammonia concentrations, higher substrate affinity (lower K[subscript m]), and lower maximum growth rates than strains in Nitrosomonas cluster 7, which includes Nitrosomonas europaea and Nitrosomonas eutropha. Genome-informed studies of this ammonia-sensitive cohort of AOB are needed, as these bacteria are found in freshwater environments, drinking water supplies, wastewater treatment systems, and soils worldwide. To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The published article is copyrighted by American Society for Microbiology. and can be found at: http://www.asm.org/.

2011-09-01T00:00:00Z Sheley, Roger L. Vasquez, Edward A. Chamberlain, Anna-Marie Smith, Brenda S. http://hdl.handle.net/1957/36126 2013-01-14T21:26:17Z 2012-10-01T00:00:00Z

Landscape-Scale Rehabilitation of Medusahead (Taeniatherum caput-medusae)- Dominated Sagebrush Steppe Sheley, Roger L.; Vasquez, Edward A.; Chamberlain, Anna-Marie; Smith, Brenda S. Producers facing infestations of invasive annual grasses regularly voice the need for practical revegetation strategies that can be applied across broad landscapes. Our objective was to determine the potential for scaling up the single-entry approach for revegetating medusahead-infested rangeland to broader, more heterogeneous landscape-scale revegetation of winter annual grass–infested rangeland. We hypothesized, when applied on a highly variable landscape scale, the combination of imazapic and seeding would provide highest abundance of perennial grasses and lowest amount of annual grasses. Treatments included a control, seeding of crested wheatgrass (‘Hycrest’) and Sandberg's bluegrass, spraying (60 g ai ha⁻¹ imazapic), and a simultaneously applied combination of spraying and seeding. The HyCrest and Sandberg's bluegrass seeding rates were 19 and 3.4 kg ha⁻¹, respectively. The treatments were applied to large plots (1.4 to 8 ha) and replicated five times, with each replication located in different watersheds throughout southeastern Oregon. This study shows that the single-entry approach can be scaled up to larger landscapes, but variation within establishment areas will likely be high. This procedure should reduce the costs over multientry treatment applications and make revegetating annual grass–infested rangeland across landscapes more affordable. This is the publisher’s final pdf. The published article is copyrighted by the Weed Science Society of America and can be found at: http://wssajournals.org/loi/ipsm. To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work.

2012-10-01T00:00:00Z Amarasekare, Kaushalya G. Mannion, Catharine M. Epsky, Nancy D. http://hdl.handle.net/1957/35102 2012-11-19T21:43:05Z 2012-10-01T00:00:00Z

Developmental Time, Longevity, and Lifetime Fertility of Three Introduced Parasitoids of the Mealybug Paracoccus marginatus (Hemiptera: Pseudococcidae) Amarasekare, Kaushalya G.; Mannion, Catharine M.; Epsky, Nancy D. Developmental time, longevity, and lifetime fertility of three previously introduced parasitoids (Acerophagus papayae Noyes and Schauff, Anagyrus loecki Noyes and Menezes, and Pseudleptomastix mexicana Noyes and Schauff) (Hymenoptera: Encyrtidae) of the mealybug Paracoccus marginatus Williams and Granara de Willink (Hemiptera: Pseudococcidae) were studied in the laboratory to understand the outcome of their recovery in field studies conducted in the United States. The developmental time of both male and female A. papayae and A. loecki was shorter than the developmental time of male and female P. mexicana. Male parasitoids of all three species had a shorter developmental time than their females. All parasitoids had a shorter developmental time in adult-female mealybugs than in second instars. Mating status (unmated and mated) had no effect on the male longevity. Unmated and mated females that were not allowed to oviposit had similar longevity and lived longer than those that were allowed to oviposit. Virgin females produced male only progeny with higher number of males from A. loecki or P. mexicana than from A. papayae. The number of females and the cumulative progeny was smaller for A. papayae than for A. loecki or P. mexicana. The progeny sex ratio (proportion of females) was not different among the parasitoids. A. papayae had the shortest reproductive period followed by A. loecki and P. mexicana, respectively. This information is important in evaluating the efficiency, recovery and establishment of A. papayae, A. loecki, and P. mexicana. This is the publisher’s final pdf. The published article is copyrighted by the Entomological Society of America and can be found at: http://www.entsoc.org/Pubs/Periodicals/EE. To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. • This article is the copyright property of the Entomological Society of America and may not be used for any commercial or other private purpose without specific written permission of the Entomological Society of America.

2012-10-01T00:00:00Z Oregon State University. Agricultural Experiment Station http://hdl.handle.net/1957/31252 2012-07-20T15:35:28Z 1990-01-01T00:00:00Z

100 years of progress : the Oregon Agricultural Experiment Station, Oregon State University, 1888-1988 Oregon State University. Agricultural Experiment Station

1990-01-01T00:00:00Z