{"title":"Paul Giller","description":null,"products":[{"product_id":"biology-of-streams-and-rivers-book-paul-giller-9780198549772","title":"The Biology of Streams and Rivers","description":"Provides an introduction to stream and river biology. Beginning with the physical features that define running water ('lotic') habitats, this book considers the organisms that inhabit them, their adaptations to their environment, and their ecology. 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Initially, the population approach was used, where interest lay in the way individual populations change and in the identification of factors af- fecting these changes. A good understanding of the dynamics of single populations is now emerging, but this has not been a very fruitful approach at the community level. In the natural world, few species can be treated as isolated populations, as most single species are the interacting parts of multispecies systems. This has led to a community approach, involving the study of interrelationships between species within com- munities and investigation of the actual organization of natural communities as a whole. The formalization of a number of new concepts and ideas has evolved from this approach, including niche theory, resource allocation, guild structure, limiting similarity, niche width and overlap etc., which, until fairly recently, have been examined mainly from a theoretical point of view. However, a wealth of field data is gradually being added to the literature, especially from the general areas of island biogeography and resource partitioning amongst closely related species. Community structure embodies patterns of resource allocation and spatial and temporal abundance of species of the community, as well a. 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Not surprisingly, therefore, it means rather different things to different people. Historically, the study of biogeogra- phy has been concentrated into compartments at separate points along a spatio-temporal gradient. At one end of the gradient, ecological biogeography is concerned with ecological processes occurring over short temporal and small spatial scales, whilst at the other end, historical biogeography is concerned with evolutionary processes over millions of years on a large, often global scale. Between these end points lies a third major compartment concerned with the profound effects of Pleistocene glaciations and how these have affected the distribution of recent organisms. Within each of these compartments along the scale gradient, a large number of theories, hypotheses and models have been proposed in an attempt to explain the present and past biotic distribution patterns. To a large extent, these compartments of the subject have been non-interactive, which is understandable from the different interests and backgrounds of the various researchers. Nevertheless, the distribu- tions of organisms across the globe cannot be fully understood without a knowledge of the full spectrum of ecological and historical processes. There are no degrees in biogeography and today's biogeographers are primarily born out of some other discipline.","brand":"WoB","offers":[{"title":"GB \/ NEW \/ INGRAM","offer_id":52140781437201,"sku":"NLS9789401070331","price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/9789401070331.jpg?v=1757575596"}],"url":"https:\/\/www.worldofbooks.com\/en-gb\/collections\/author-books-by-paul-giller.oembed","provider":"World of Books ","version":"1.0","type":"link"}