Before 1910 the American chestnut was one of the most common trees in the eastern United States. Although historical evidence suggests the natural distribution of the American chestnut extended across more than four hundred thousand square miles of territory—an area stretching from eastern Maine to southeast Louisiana—stands of the trees could also be found in parts of Wisconsin, Michigan, Washington State, and Oregon. An important natural resource, chestnut wood was preferred for woodworking, fencing, and building construction, as it was rot resistant and straight grained. The hearty and delicious nuts also fed wildlife, people, and livestock. Ironically, the tree that most piqued the e...
This book begins with an account of the early history of Phytophthora research and the tumultuous events setting the genus in motion. In keeping with its controversial inception, the chapter on taxonomy and phylogeny makes a compelling case that our current notion of Phytophthora as a genus is illusory. This chapter sets the stage for the importance of molecular tools on these enigmatic pathogens. The following chapters discuss species identification, population-level investigation, interspecific hybrids and the impact of diverse Phytophthora species on crops, forests, nurseries, greenhouses and natural areas worldwide.
A comprehensive review essential for all involved in the management of natural and planted pine forests.
Invasion ecology is the study of the causes and consequences of the introduction of organisms to areas outside their native range. Interest in this field has exploded in the past few decades. Explaining why and how organisms are moved around the world, how and why some become established and invade, and how best to manage invasive species in the face of global change are all crucial issues that interest biogeographers, ecologists and environmental managers in all parts of the world. This book brings together the insights of more than 50 authors to examine the origins, foundations, current dimensions and potential trajectories of invasion ecology. It revisits key tenets of the foundations of invasion ecology, including contributions of pioneering naturalists of the 19th century, including Charles Darwin and British ecologist Charles Elton, whose 1958 monograph on invasive species is widely acknowledged as having focussed scientific attention on biological invasions.
"This book is based on a symposium held in Bad Windsheim, Germany, in Aug. 1990. The 30 chapters are grouped into 5 sections. Part I concerns morphological taxonomy of the ophiostomatoid fungi, including their anamorphs. In Part II, nonmorphological taxonomic approaches are considered, including genetic, biochemical, developmental and molecular characters. In Part III, the pathological aspects are introduced, beginning with considerations of saprobic growth and progressing through tree diseases to human diseases. Part IV includes reviews of a variety of insect vector systems and host responses to both the insects and the fungi. A few chapters, including information on methods for handling ophiostomatoid fungi, a key for their identification and a list of described species, were not presented at the symposium."--pub. desc.
Spanning the colonial, postcolonial, and postapartheid eras, these historical and locally specific case studies analyze and engage vernacular, activist, and scholarly efforts to mitigate social-environmental inequity. This book highlights the ways poor and vulnerable people in South Africa, Lesotho, and Zimbabwe have mobilized against the structural and political forces that deny them a healthy and sustainable environment. Spanning the colonial, postcolonial, and postapartheid eras, these studies engage vernacular, activist, and scholarly efforts to mitigate social-environmental inequity. Some chapters track the genealogies of contemporary activism, while others introduce positions, actors, ...