John L. Harper – författare

Ecology: From Individuals to Ecosystems, 4eBegon, Townsend, and Harper's Ecology has long been regarded as the definitive textbook on all aspects of ecology. This new edition provides a comprehensive treatment of the subject, from the first principles of ecology to the current state of the field, and aims to improve students' preparedness to address the environmental problems of the new millennium.Thoroughly revised and updated, this fourth edition includes: three new chapters on applied ecology, reflecting a rigorous, scientific approach to the ecological problems now facing mankinddiscussion of over 800 new studies, updating the text throughoutan updated, user-friendly design with margin notes and chapter summaries that serve as study aidsThe resulting textbook is easy to use, lucid and up-to-date, and is the essential reference for all students whose degree program includes ecology and for practicing ecologists.Practical Statistics for Field Biology, 2eProvides an excellent introductory text for students on the principles and methods of statistical analysis in the life sciences, helping them choose and analyse statistical tests for their own problems and present their findings.An understanding of statistical principles and methods is essential for any scientist but is particularly important for those in the life sciences. The field biologist faces very particular problems and challenges with statistics as "real-life" situations such as collecting insects with a sweep net or counting seagulls on a cliff face can hardly be expected to be as reliable or controllable as a laboratory-based experiment. Acknowledging the peculiarites of field-based data and its interpretation, this book provides a superb introduction to statistical analysis helping students relate to their particular and often diverse data with confidence and ease.To enhance the usefulness of this book, the new edition incorporates the more advanced method of multivariate analysis, introducing the nature of multivariate problems and describing the the techniques of principal components analysis, cluster analysis and discriminant analysis which are all applied to biological examples. An appendix detailing the statistical computing packages available has also been included.It will be extremely useful to undergraduates studying ecology, biology, and earth and environmental sciences and of interest to postgraduates who are not familiar with the application of multiavirate techniques and practising field biologists working in these areas.

Plant Life Histories re-examines patterns of relationship between plant life history traits in phylogenetic perspective. The re-examination first recognises that because evolution is a branching process, traits are not randomly distributed across taxa and that therefore analysis of trait correlations cannot treat species as independent data points. It then discusses the use of phylogeny to reconstruct the evolutionary pathways of traits. Part I looks at the use of the phylogenetic perspective on trait correlation. Parts II-IV examine traits from the reproductive phase from seed production and dispersal to recruitment and growth. The final section looks at interactions between plants and competitors, herbivores and microbial symbionts, recognising that these interactions may have an ancient evolutionary history. Students and researchers of evolution, ecology and botany will find much of value here.