Author: Humphrey Neville DickinsonPublisher:
ISBN:
Category :
Languages : en
Pages : 344
Book Description
Keddy
Author: Humphrey Neville DickinsonPublisher:
ISBN:
Category :
Languages : en
Pages : 344
Book Description
Wetland Ecology
Author: Paul A. KeddyPublisher: Cambridge University Press
ISBN: 0521739675
Category : Nature
Languages : en
Pages : 549
Book Description
This text provides a synthesis of the existing field of wetland ecology using a few central themes, including key environmental factors that produce wetland community types and some unifying problems such as assembly rules, restoration and conservation.
A Framework for Community Ecology
Author: Paul A. KeddyPublisher: Cambridge University Press
ISBN: 1316512606
Category : Nature
Languages : en
Pages : 373
Book Description
Offers a unifying framework for community ecology by addressing how communities are assembled from species pools.
Plants and Vegetation
Author: Paul KeddyPublisher: Cambridge University Press
ISBN: 1139464256
Category : Nature
Languages : en
Pages : 563
Book Description
Plants make up 99.9 percent of the world's living matter, provide food and shelter, and control the Earth's climate. The study of plant ecology is therefore essential to understanding the biological functions and processes of the biosphere. This vibrant introductory textbook integrates important classical themes with recent ideas, models and data. The book begins with the origin of plants and their role in creating the biosphere as the context for discussing plant functional types and evolutionary patterns. The coverage continues logically through the exploration of causation with chapters, amongst others, on resources, stress, competition, predation, and mutualism. The book concludes with a chapter on conservation, addressing the concern that as many as one-third of all plant species are at risk of extinction. Each chapter is enriched with striking and unusual examples of plants (e.g., stone plants, carnivorous plants) and plant habitats (e.g., isolated tropical tepui, arctic cliffs). Paul Keddy writes in a lively and thought-provoking style which will appeal to students at all levels.
Hearings
Author: United States. Congress. HousePublisher:
ISBN:
Category :
Languages : en
Pages : 2810
Book Description
Customs Administration and Personnel
Author: United States. Congress. House. Committee on Ways and MeansPublisher:
ISBN:
Category : Customs administration
Languages : en
Pages : 88
Book Description
Competition
Author: P.A. KeddyPublisher: Springer Science & Business Media
ISBN: 9401006946
Category : Science
Languages : en
Pages : 565
Book Description
Competition is one of the most important factors controlling the distribution and abundance of living creatures. Sperm cells racing up reproductive tracts, beetle larvae battling inside single seeds, birds defending territories, and trees interfering with the light available to neighbours, are all engaged in competition for limited resources. Along with predation and mutualism, competition is one of the three major biological forces that assemble living communities. Recent experimental work, much of it only from the last few decades, has enhanced human knowledge of the prevalence of competition in nature. There are acacia trees that use ants to damage vines, beetles that compete in arenas for access to dung balls, tadpoles that apparently poison their neighbours, birds that smash the eggs of potential competitors, and plants that associate with fungi in order to increase access to soil resources. While intended as an up-to-date reference work on the state of this branch of ecology, the many non-technical examples will make interesting reading for those with a general interest in nature. Greatly expanded from the first prize-winning edition, there are entirely new chapters, including one on resources and another on competition gradients in nature. The author freely ranges across all major taxonomic groups in search of evidence. The question of whether competition occurs is no longer useful, the author maintains; rather the challenge is to determine when and where each kind of competition is important in natural systems. For this reason, variants of competition such as intensity, asymmetry and hierarchies are singled out for particular attention. The book concludes with the difficulties of finding general principles in complex ecological communities, and illustrates the limitations on knowledge that arise out of the biased conduct of scientists themselves. Competition can be found elsewhere in living systems other than ecological communities, at sub-microscopic scales in the interactions of enzymes and neural pathways, and over large geographic areas in the spread of human populations and contrasting ideas about the world. Human societies are therefore also examined for evidence of the kinds of competition found among other living organisms. Using an array of historical examples, including Biblical conflicts, the use of noblemen's sons in the Crusades, the Viking raids in Europe, strategic bombing campaigns in the Second World War, and ethnic battles of the Balkans, the book illustrates how most of the aspects of competition illustrated with plants and animals can be extended to the interactions of human beings and their societies.
Independent Offices Appropriations for 1955
Author: United States. Congress. House. Committee on AppropriationsPublisher:
ISBN:
Category : Executive departments
Languages : en
Pages : 1192
Book Description
The Nova Scotia Reports
Author: Nova Scotia. Supreme CourtPublisher:
ISBN:
Category : Law reports, digests, etc
Languages : en
Pages : 636
Book Description
Wetland Restoration, Flood Pulsing, and Disturbance Dynamics
Author: Beth MiddletonPublisher: John Wiley & Sons
ISBN: 9780471292630
Category : Nature
Languages : en
Pages : 404
Book Description
While it is generally accepted that flood pulsing and disturbance dynamics are critical to wetland viability, there is as yet no consensus among those responsible for wetland restoration about how best to plan for those phenomena or even whether it is really necessary to do so at all. In this groundbreaking book, Dr. Beth Middleton draws upon the latest research from around the world to build a strong case for making flood pulsing and disturbance dynamics integral to the wetland restoration planning process. While the initial chapters of the book are devoted to laying the conceptual foundations, most of the coverage is concerned with demonstrating the practical implications for wetland restoration and management of the latest ecological theory and research. It includes a fascinating case history section in which Dr. Middleton explores the restoration models used in five major North American, European, Australian, African, and Asian wetland projects, and analyzes their relative success from the perspective of flood pulsing and disturbance dynamics planning. Wetland Restoration also features a wealth of practical information useful to all those involved in wetland restoration and management, including: A compendium of water level tolerances, seed germination, seedling recruitment, adult survival rates, and other key traits of wetland plant species A bibliography of 1,200 articles and monographs covering all aspects of wetland restoration A comprehensive directory of wetland restoration ftp sites worldwide An extensive glossary of essential terms Wetland Restoration, Flood Pulsing, and Disturbance Dynamics is a valuable working resource for wetland restoration consultants, employees of government agencies, and professional land managers, as well as ecologists, foresters, and geologists involved with wetland restoration and management. It is also an excellent text for advanced courses in wetland restoration.