In nature there exist three main types of biotic interactions between individuals of different species: competition, predation, and mutualism. All three exert powerful selection pressures, and all three shape communities. However, the question of how important interspecific competition in nature really is remains controversial and unresolved. This book provides a critical and exhaustive review of the topic. Although the examples are limited mostly to birds (interspecific competition and community structure have been exhaustively studied in this animal group, and a lot of experimental data are available), the conclusions reached have a far broader relevance to population ecologists in general. The book reasons that the coexistence of species is the result of both past and presently on-going interspecific competition. Furthermore, understanding the importance of interspecific competition in natural systems will be increasingly important when modelling the effects of climate change on populations.
Polly Parrett meets Polly parrot. Together, can they solve a murder mystery? Things just don't always go the right way for pet-sitter, Polly Parrett. Dogs and cats can be tough enough; now she finds herself having to cope with a moody macaw, a volatile new resident at her mother's halfway house for veterans, and oh yeah, a dead body. What's more, the parrot and Polly share the same name, which not only makes for a lot of confusion, but it just might be that the parrot is the smarter of the two.
The book is aimed directly at field identification. For those species that are sexually dimorphic, have both breeding and non-breeding plumages, or in which the juvenile plumage differs markedly from that of the adult, more than one photograph has been included. Thumbnail silhouettes aid the reader in quickly locating the correct group of birds, and for each species account a map shows the bird's distribution.
Olmstead writes from an open systems perspective-a viewpoint of organizations that adapt quickly to turbulent, uncertain business environments-offering an integrated, understandable, and highly practical way to analyze, assess, and improve organization performance. He demonstrates how organizations actually function, and shows how they can identify and overcome obstacles by creating organizational competence-the critical elements that give organizations the ability to perform effectively in the modern business world. Upper level students, scholars, and teachers will find Olmstead's book an important addition to their academic reading lists. For practitioners, particularly those in rapid response organizations, this book will be an indispensable aid in the struggle to keep their organizations up to date and abreast of the competition.
Rock Pigeon struts down the street, bopping his head to the music's beat. He's looking for some feathered friends to join his musical band. Discover the characteristics of pigeons, eagles, and all types of birds in this fun song paired with beautiful illustrations. This paperback book comes with CD and online music access.
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