Digital Commons Network^™

The Gc-Rich Mitochondrial And Plastid Genomes Of The Green Alga Coccomyxa Give Insight Into The Evolution Of Organelle Dna Nucleotide Landscape, David Roy Smith, Fabien Burki, Takashi Burki, Jane Grimwood, Igor V, Grigoriev, James L. Van Etten, Patrick J. Keeling

Department of Plant Pathology: Faculty Publications

Most of the available mitochondrial and plastid genome sequences are biased towards adenine and thymine (AT) over guanine and cytosine (GC). Examples of GC-rich organelle DNAs are limited to a small but eclectic list of species, including certain green algae. Here, to gain insight in the evolution of organelle nucleotide landscape, we present the GC-rich mitochondrial and plastid DNAs from the trebouxiophyte green alga Coccomyxa sp. C-169. We compare these sequences with other GC-rich organelle DNAs and argue that the forces biasing them towards G and C are nonadaptive and linked to the metabolic and/or life history features of this …

Minimal Art: Or Why Small Viral K+ Channels Are Good Tools For Understanding Basic Structure And Function Relations, Gerhard Thiel, Dirk Baumeister, Indra Schroeder, Stefan M. Kast, James L. Van Etten, Anna Moroni

James Van Etten Publications

Some algal viruses contain genes that encode proteins with the hallmarks of K+ channels. One feature of these proteins is that they are less than 100 amino acids in size, which make them truly minimal for a K+ channel protein. That is, they consist of only the pore module present in more complex K+ channels. The combination of miniature size and the functional robustness of the viral K+ channels make them ideal model systems for studying how K+ channels work. Here we summarize recent structure/function correlates from these channels, which provide insight into functional properties such as gating, pharmacology and …

Modeling Gross Primary Production Of Irrigated And Rain-Fed Maize Using Modis Imagery And Co2 Flux Tower Data, Joshua L. Kalfas, Xiangming Xiao, Diana X. Vanegas, Shashi B. Verma, Andrew E. Suyker

School of Natural Resources: Faculty Publications

Abstract

Information on gross primary production (GPP) of maize croplands is needed for assessing and monitoring maize crop conditions and the carbon cycle. A number of studies have used the eddy covariance technique to measure net ecosystem exchange (NEE) of CO₂ between maize cropland fields and the atmosphere and partitioned NEE data to estimate seasonal dynamics and interannual variation of GPP in maize fields having various crop rotation systems and different water management practices. How to scale up in situ observations from flux tower sites to regional and global scales is a challenging task. In this study, the Vegetation …

National Center For Pharmaceutical Crops, Wei Yuan, Shiyou Li, Zushang Su, Ping Wang

NCPC Presentations

The mission of the National Center for Pharmaceutical Crops is to develop crops for the production of pharmaceutical and other bioactive compounds. The NCPC, located in the Arthur Temple College of Forestry and Agriculture, is the only one of its kind in the U.S. and it seeks to improve human health, revitalize rural economies and enhance U.S. security in strategic pharmaceuticals. This poster provides a background to the department, its functions and activities and notable achievements.

Seedlings 2011, Sean M. Goins, Joseph Braner, Amy L. Myers, Charlie Jackson, Julia I. Chapman, Ryan W. Mcewan

Data Files: Drew Woods Permanent Plots

Seedling data (woody species up to 50 centimeters in height) collected in 2011 at Drew Woods State Nature Preserve in Darke County, OH. Data key is provided in a supplemental file.

Temperature Increase Effects On Sagebrush Ecosystem Forbs: Exprimental Evidence And Range Manager Perspectives, Hilary Louise Whitcomb

Green Canyon Environmental Research Area, Logan Utah

No abstract provided.

White Apple Leafhopper Typhlocyba Pomaria, Diane G. Alston, Michael E. Reding

All Archived Publications

No abstract provided.

Domain And Propositions Of Succession Theory, Steward Pickett, Scott Meiners, Mary Cadenasso

Faculty Research & Creative Activity

Succession is perhaps the oldest of ecological concepts, having arisen when ecology was emerging as a self-conscious discipline (Mcintosh 1985). Yet it continues to address many fundamental issues in ecology, to support important applications, and to synthesize the insights and perspectives of other theories. Thus, it fulfills two functions key in assessing the utility of a contemporary ecological theory. First, it exhibits the attributes of a mature, welldeveloped, and intensively tested theory (Glenn-Lewin et al. 1992; Pickett and Cadenasso 2005). Second, it provides a linkage among theories and applications that have usually been considered separately (Walker et al. 2007). For …

Angiosperm Phylogeny: 17 Genes, 640 Taxa, Douglas E. Soltis, Steven A. Smith, Nico Cellinese, Kenneth J. Wurdack, David C. Tank, Samuel F. Brockington, Nancy F. Refulio-Rodriguez, Jay B. Walker, Michael J. Moore, Barbara S. Carlsward, Charles D. Bell, Maribeth Latvis, Sunny Crawley, Chelsea Black, Diaga Diouf, Zhenxiang Xi, Catherine A. Rushworth, Matthew A. Gitzendanner, Kenneth J. Sytsma, Yin-Long Qiu, Khidir W. Hilu, Charles C. Davis, Michael J. Sanderson, Reed S. Beaman, Richard G. Olmstead, Walter S. Judd, Michael S. Donoghue, Pamela S. Soltis

Faculty Research & Creative Activity

• Premise of the study : Recent analyses employing up to fi ve genes have provided numerous insights into angiosperm phylogeny, but many relationships have remained unresolved or poorly supported. In the hope of improving our understanding of angiosperm phylogeny, we expanded sampling of taxa and genes beyond previous analyses.

• Methods : We conducted two primary analyses based on 640 species representing 330 families. The fi rst included 25 260 aligned base pairs (bp) from 17 genes (representing all three plant genomes, i.e., nucleus, plastid, and mitochondrion). The second included 19 846 aligned bp from 13 genes (representing only …

Cat-Facing Insects, Diane G. Alston, Michael E. Reding

All Archived Publications

No abstract provided.

Wetland Features And Landscape Context Predict The Risk Of Wetland Habitat Loss, Kevin J. Gutzwiller, Curtis H. Flather

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

Wetlands generally provide significant ecosystem services and function as important harbors of biodiversity. To ensure that these habitats are conserved, an efficient means of identifying wetlands at risk of conversion is needed, especially in the southern United States where the rate of wetland loss has been highest in recent decades. We used multivariate adaptive regression splines to develop a model to predict the risk of wetland habitat loss as a function of wetland features and landscape context. Fates of wetland habitats from 1992 to 1997 were obtained from the National Resources Inventory for the U.S. Forest Service’s Southern Region, and …

Nebraska’S Forest Resources, 2011, Dacia Meneguzzo, Chuck Barnett

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

This publication provides an overview of forest resource attributes for Nebraska based on an annual inventory conducted by the Forest Inventory and Analysis (FIA) program at the Northern Research Station of the U.S. Forest Service. These estimates, along with web-posted core tables, will be updated annually. For more information please refer to page 4 of this report.

Fagus Grandifolia, Janice Coons, Nancy Coutant, Wesley Whiteside

Plants by Genus Species

American beech has a broad native range across eastern North America from northern Florida, north to Maine and Nova Scotia, west to Michigan and eastern Wisconsin, south along the southeastern border of Illinois and Missouri and into southern Arkansas, southeastern Texas, and Louisiana across the Gulf of Mexico states all forming a perimeter wherein it is distributed (Burns 1990).

Davidia Involucrata, Janice Coons, Nancy Coutant, Wesley Whiteside

Plants by Genus Species

The dove tree has a native distribution in the West Szechuan and West Hupeh regions of China (Dirr 1998).

Quercus Alba, Janice Coons, Nancy Coutant, Wesley Whiteside

Plants by Genus Species

Quercus alba has a natural range from Texas, north through Oklahoma, Kansas, Nebraska, Iowa, Minnesota, and Ontario, east throughout the rest of the United States, including Ontario and Quebec in Canada (USDA 2011).

Aceraceae - Acer Triflorum Komar, Janice Coons, Nancy Coutant, Wesley Whiteside

Plants by Family

The three flowered maple is an attractive plant particularly for its exfoliating bark and vibrant fall foliage offering shades of orange, red, yellow, and purple that doesn’t get the horticultural attention that may be deserving of its ornamental character (Hill 2010).

Musa Basjoo, Janice Coons, Nancy Coutant, Wesley Whiteside

Plants by Genus Species

While often listed to be native to Japan, Musa basjoo, was actually introduced into Japan from China where the only wild populations remain in the Sichuan Province. The original Japanese account was of a cultivated specimen (Liu 2002).

Nyssa Sylvatica, Janice Coons, Nancy Coutant, Wesley Whiteside

Plants by Genus Species

Nyssa sylvatica has a native range from Texas, north into Oklahoma, Kansas, Missouri, Illinois, Wisconsin, and east throughout the rest of the United States, including Ontario in Canada (USDA 2011).

Magnolia Tripetala, Janice Coons, Nancy Coutant, Wesley Whiteside

Plants by Genus Species

In the wild, the umbrella magnolia is found in forests from Pennsylvania south to Georgia and west to Arkansas and Mississippi. It prefers moist soil along mountain streams and edges of swamps (Callaway 1994). As broad as its range, it is never common.

Metasequoia Glyptostroboides, Janice Coons, Nancy Coutant, Wesley Whiteside

Plants by Genus Species

Dawn redwood has a limited native range consisting of a number of populations in the mixed forests of the western Hubei, eastern Sichuan, and southern Hunan Provinces of China. There are also single trees that exist outside its range that are evidence of a wider range that is suspected to have existed before settlement of these areas and subsequent harvesting of the trees for anthropogenic use (Williams 2005).

Acer Triflorum, Janice Coons, Nancy Coutant, Wesley Whiteside

Plants by Genus Species

Acer triflorum has a native range in forests of Manchuria and south-central Korea (Dirr 1998, Jones 1999).

Magnolia Macrophylla, Janice Coons, Nancy Coutant, Wesley Whiteside

Plants by Genus Species

While never becoming a dominant tree, the bigleaf magnolia has a wide natural range in forests as far south as Georgia, west to Louisiana and Arkansas, north up to Ohio and Kentucky with it being most common in south central Mississippi. It prefers shady and moist areas along gorges (Callaway 1994).

Ostrya Virginiana, Janice Coons, Nancy Coutant, Wesley Whiteside

Plants by Genus Species

Ostrya virginiana occurs on dry woodland slopes in its natural range from Crook County of northeastern most Wyoming, and east throughout nearly the rest of North America, with exception of Newfoundland and Labrador in Canada (Dirr 1998, USDA 2011).

Magnolia Virginiana, Janice Coons, Nancy Coutant, Wesley Whiteside

Plants by Genus Species

Magnolia virginiana has a native range from Florida, north to Massachusetts, New York, and Pennsylvania, and south to Arkansas, Oklahoma and Texas in swamps (Callaway 1994).

Franklinia Alatamaha, Janice Coons, Nancy Coutant, Wesley Whiteside

Plants by Genus Species

Noted botanists John and William Bartram were the first to come across Franklinia on October 1, 1765 along the Altamaha (formerly Alatamaha) River near Fort Barrington, Georgia (Fry 2000, Tredici 2005). It was last observed growing in nature in 1803, and has long been extinct in the wild.

Ginkgo Biloba, Janice Coons, Nancy Coutant, Wesley Whiteside

Plants by Genus Species

Natural stands of Ginkgo biloba are all but eliminated from the wild with the exception of those occurring in mountains along the Yangtze River in China (Royer 2003).

Parrotia Persica, Janice Coons, Nancy Coutant, Wesley Whiteside

Plants by Genus Species

Persian ironwood has a native range in moist forests of lowlands and low mountains in northern Iran (Binka 2003).

Succession, Scott J. Meiners, Steward Pickett

Faculty Research & Creative Activity

Succession in a strict sense refers to the recovery and revegetation of an area following a disturbance such as the cessation of agriculture, the retreat of a glacier, or an intense forest fi re. Succession is a special case of vegetation dynamics, although many early ecologists referred to all vegetation change as succession. Succession includes a series of compositional and structural changes, often in a directional manner. The common occurrence of natural disturbances coupled with the extent of human activity on the planet makes succession one of the most ubiquitous ecological processes. Because invasion is a crucial feature of succession, …

Diospyros Virginiana, Janice Coons, Nancy Coutant, Wesley Whiteside

Plants by Genus Species

Diospyros virginiana has a native range from Nebraska, east through the Midwest to the East Coast into New York and Maryland, throughout the Southeast and down to Texas, including Utah and California (USDA 2011).

Memory Access Patterns For Cellular Automata Using Gpgpus, James Michael Balasalle

Electronic Theses and Dissertations

Today's graphical processing units have hundreds of individual processing cores that can be used for general purpose computation of mathematical and scientific problems. Due to their hardware architecture, these devices are especially effective when solving problems that exhibit a high degree of spatial locality. Cellular automata use small, local neighborhoods to determine successive states of individual elements and therefore, provide an excellent opportunity for the application of general purpose GPU computing. However, the GPU presents a challenging environment because it lacks many of the features of traditional CPUs, such as automatic, on-chip caching of data. To fully realize the potential …