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The BOREAS TE-6 team collected several data sets to examine the influence of vegetation, climate, and their interactions on the major carbon fluxes for boreal forest species. This data set contains summaries of predawn leaf water potentials and foliage moisture contents collected at the TF and CEV sites that had canopy access towers. The data were collected on a nearly weekly basis from early June to late August 1994 by TE-06, members of the BOREAS staff, and employees of Environment Canada. The data are provided in tabular ASCII files. The data files are available on a CD-ROM (see document number 20010000884), or from the Oak Ridge National Laboratory (ORNL) Distributed Activity Archive Center (DAAC). Hall, Forrest G. (Editor) and Curd, Shelaine (Editor) and Vogel, Jason G. Goddard Space Flight Center NASA/TM-2000-209891/VOL144, Rept-03136-0-/VOL144, NAS 1.15:209891/VOL144
This is a thorough study of photosynthetic mechanisms from cells to leaves, crown, and canopy. The authors question whether photosynthetic adaptations take place primarily at the metabolic and biochemical level or through changes in structure and form, or both. The text goes on to analyze the relative importance of genes that control metabolic and light reactions, and the structure, arrangement, and orientation of photosynthesis.
For 100 million years the Gondwanan vegetation of Australia has survived and developed in the face of vast changes in climate and soils. The pressure imposed on the vegetation by European settlers during the last 200 years is in clear contrast to the minimal impact of Aborigines. Environmental managers and planners predicting the short- and long-term effects of environmental changes on ecosystems need to understand the basic principles of plant community physiology. Australian Plant Communities: The Dynamics of Structure, Growth and Biodiversity is the first synthesis of the physiological processes that shape Australian vegetation at the level of the entire plant community. It examines the basic principles of community physiology by referring to the vegetation of Australia, with its great diversity of natural plant communities, many of which are still relatively undisturbed. The principles developed are applicable to landscapes throughout the world. By revealing the fundamental determinants of vegetation structure, the book enables the effects of climate change on biodiversity, of both vegetation and its associated fauna, to be predicted. Plant Communities in Australia, lavishly illustrated with figures and graphs, is written in a clear and concise style and refers to many studies of the processes operating in Australian vegetation. It is an excellent text for undergraduate and graduate courses in environmental science, resource management, and environmental planning and impact assessment. It is also an invaluable reference for practising environmental scientists, planners, and managers.
With today’s ever growing economic and ecological problems, wood as a raw material takes on increasing significance as the most important renewable source of energy and as industrial feedstock for numerous products. Its chemical and anatomical structure and the excellent properties that result allow wood to be processed into the most diverse products; from logs to furniture and veneers, and from wood chippings to wooden composites and paper. The aim of this book is to review advances in research on the cellular aspects of cambial growth and wood formation in trees over recent decades. The book is divided into two major parts. The first part covers the basic process of wood biosynthesis, focusing on five major steps that are involved in this process: cell division, cell expansion, secondary cell wall formation, programmed cell death and heartwood formation. The second part of the book deals with the regulation of wood formation by endogenous and exogenous factors. On the endogenous level the emphasis is placed on two aspects: control of wood formation by phytohormones and by molecular mechanisms. Apart from endogenous factors, various exogenous effects (such as climate factors) are involved in wood formation. Due to modern microscopic as well as molecular techniques, the understanding of wood formation has progressed significantly over the last decade. Emphasizing the cellular aspects, this book first gives an overview of the basic process of wood formation, before it focuses on factors involved in the regulation of this process.
A study of the religious system of Mithraism, one of the 'mystery cults' popular in the Roman Empire contemporary with early Christianity. Mithraism is described from the point of view of the initiate engaging with its rich repertoire of symbols and practices.
This volume offers selected contributions to the 8th International Congress of Ecology to illuminate large-scale ecological problems and discuss how these can be managed through a variety of planning processes. From mathematical approaches to improve understanding of complex ecosystems, to monitoring activity and human impact, this book covers a truly global range of issues. The book concludes with a summary of the Congress, and a discussion of possible future directions.