So long as both goods are produced and factor intensity reversals do not occur, each price vector (pX , pY ) corresponds to a unique factor price vector. This should be pretty obvious from both the Woodland-Mussa and the Lerner-Pearce diagram. With the same technology and given prices, there is a unique intersection between the zero profit lines in the Woodland-Mussa diagram. Similarly, for giv...

Anthropologists have long been interested in the behavioral ecology of nonhuman primates living in savannas given what we know of early hominin environments. As expected, chimpanzees in the Fongoli community in southeastern Sénégal show a unique suite of behavioral adaptations to stresses associated with their savanna habitat. While Fongoli chimpanzees are species-typical in certain regards, su...

The Southern Appalachian Mountains and Ohio Hills sites are unique within the National Fire and Fire Surrogate Study because they are in hardwood-dominated forests. The efficacy of four fuel-reduction treatments was evaluated to restore these unmanaged hardwood forests to the structure and function of open woodland habitats. Treatments included control, prescribed burning, mechanical, and a com...

Natural experiments have been proposed as a way of complementing manipulative experiments to improve ecological understanding and guide management. There is a pressing need for evidence from such studies to inform a shift to landscape-scale conservation, including the design of ecological networks. Although this shift has been widely embraced by conservation communities worldwide, the empirical...

Euschistus servus (Say), Chinavia hilaris (Say), and Nezara viridula (L.) (Hemiptera: Pentatomidae) are economic pests of row crops. They move within and between closely associated crop and non-crop habitats throughout the growing season in response to deteriorating suitability of their current host plants. This study was conducted to investigate parasitism of naturally occurring C. hilaris and...

In xeric environments, water-use efficiency (WUE) is likely to be a target of natural selection. Higher WUE is expected to confer a fitness advantage in drought conditions, but this prediction has rarely been tested. To examine the relationships between WUE and fitness, two common garden experiments were conducted. Inbred lines of Impatiens capensis derived from wet and relatively dry sites wer...

Stand-replacing natural disturbances in mature forests are traditionally seen as events that cause forests to revert to early stages of succession and maintain species diversity. In some cases, however, such transitions could be an artifact of salvage logging and may increase biotic homogenization. We present initial (two-year) results of a study of the effects of tornado damage and the combine...

Dere Street is the Roman road which ran north from Eboracum (York), crossing Stanegate at Corbridge and continuing into what now Scotland. The served a military economic purpose facilitating transport of troops trade south across frontier zone. Here we present well resolved palaeoenvironmental record within Hadrianic-Antonine zone that tied directly to archaeological evidence for street. indica...

Medicinal herbs are increasing in popularity across the world. Consumer sales of herbs and botanicals reached $4.41 billion in 2005 (Nutrition Business Journal 2006). Many medicinal herb products are made from native woodland botanicals that are wild-harvested from natural stands. Most, if not all, of these woodland botanicals can be cultivated commercially. This is beneficial for the conservat...