Sir Arthur Tansley was the leading figure in ecology for the first half of the 20th century, founding the field, and forming its first professional societies. He was the first President of the British Ecological Society and the first chair of the Field Studies Council. His work as a botanist is considered seminal and he is recognized as one of the giants of ecology throughout the world. Ecology underpins the principles and practices of modern conservation and the maintenance of biodiversity. It explains the causes of, and offers solutions to, problems of climate change. Yet ecology is a young science, barely 100 years old. Its origins lie in phytogeography, the naming and mapping of plants. Shaping Ecology is a book about a multi-faceted man whose friends included Bertrand Russell, Marie Stopes, Julian Huxley, GM Trevelyan, and Solly Zuckerman. Historical context is provided by Tansley's family for his parents moved in the Fabian-socialist world of John Ruskin and Octavia Hill, both instrumental in the foundation of the National Trust. While Britain was relatively slow to protect its green spaces and wildlife, it did establish in 1913 the first professional Ecological Society in the world. Tansley was its President. Organising the British Vegetation Committee and initiating a series of International Phytogeographic Excursions, he changed phytogeography into ecology.

Deals with speciation phenomena in higher plants beginning with a consideration of populations and races followed by a discussion of the nature and behavior of species, and the primary divergence of species.

In the course of evolution, a great variety of root systems have learned to overcome the many physical, biochemical and biological problems brought about by soil. This development has made them a fascinating object of scientific study. This volume gives an overview of how roots have adapted to the soil environment and which roles they play in the soil ecosystem. The text describes the form and function of roots, their temporal and spatial distribution, and their turnover rate in various ecosystems. Subsequently, a physiological background is provided for basic functions, such as carbon acquisition, water and solute movement, and for their responses to three major abiotic stresses, i.e. hard soil structure, drought and flooding. The volume concludes with the interactions of roots with other organisms of the complex soil ecosystem, including symbiosis, competition, and the function of roots as a food source.

The roots of most plants are colonized by symbiotic fungi to form mycorrhiza, which play a critical role in the capture of nutrients from the soil and therefore in plant nutrition. Mycorrhizal Symbiosis is recognized as the definitive work in this area. Since the last edition was published there have been major advances in the field, particularly in the area of molecular biology, and the new edition has been fully revised and updated to incorporate these exciting new developments. - Over 50% new material - Includes expanded color plate section - Covers all aspects of mycorrhiza - Presents new taxonomy - Discusses the impact of proteomics and genomics on research in this area

This book provides an overview of the latest advances concerning symbiotic relationships between plants and microbes, and their applications in plant productivity and agricultural sustainability. Symbiosis is a living phenomenon including dynamic variations in the genome, metabolism and signaling network, and adopting a multidirectional perspective on their interactions is required when studying symbiotic organisms. Although various plant-microbe symbiotic systems are covered in this book, it especially focuses on arbuscular mycorrhiza (AM) symbiosis and root nodule symbiosis, the two most prevalent systems. AM symbiosis involves the most extensive interaction between plants and microbes, in the context of phylogeny and ecology. As more than 90% of all known species of plants have the potential to form mycorrhizal associations, the productivity and species composition, as well as the diversity of natural ecosystems, are frequently dependent upon the presence and activity of mycorrhizas. In turn, root nodule symbiosis includes morphogenesis and is formed by communication between plants and nitrogen-fixing bacteria. The biotechnological application of plant–microbe symbiosis is expected to foster the production of agricultural and horticultural products while maintaining ecologically and economically sustainable production systems. Designed as a hands-on guide, this book offers an essential resource for researchers and students in the areas of agri-biotechnology, soil biology and fungal biology.