When we look at our planet’s species distribution, we observe a very interesting pattern: as we move from the Poles to the Equator, the number of species drastically increases. This is what has been called ‘latitudinal gradient of species diversity’. In short, it means that tropical areas, which are located between the Tropic of Cancer and the Tropic of Capricorn, harbor a greater number of species than temperate areas. We still don’t know exactly what causes (or have caused) this phenomenon, but we know that it resulted in high endism, that is, a large number of animals and plants unique to these areas. The tropical areas of the globe are an intricate patchwork of various ecosystems. Tropical ecosystems can vary from rainforests to deserts; from savannahs to mangroves, and we have a lot to learn from them. However, in recent years we have witnessed an increase in rates of habitat destruction, particularly in the tropics. Currently, many tropical ecosystems are under threat, as vast areas are devastated to give space to cities, agriculture, and cattle farms. As tropical areas vanish, so do species previously unknown to us, as well as ecological processed specific to these environments. Moreover, due to its global importance, devastation of tropical areas has potential impacts on other non-tropical ecosystems, and may exacerbate climate change, as well as influence the spread of tropical diseases. On the other side of this battle, there are many scientists that dedicated themselves to the study of the fascinating tropical biodiversity. This collection of articles aims at highlighting their contributions to our understanding of tropical patterns and processed leading to this incredible biodiversity. It focuses on the wonders of the tropical areas of the globe, by asking, amongst others, the following questions: Which species of plants and animals are found in tropical areas? What can we learn about tropical ecology and how can this knowledge help us conserve these ecosystems for future generations?

This book explores the biological underpinnings of social systems from invertebrates to mammals, particularly humans. These social systems, the authors argue, represent fusions between the economic and reproductive interests of organisms. Their theory reinstates the importance of economics in social organizations of all types, moving away from the more prominent emphasis on reproductive biology at the core of sociobiology.

The importance of the Neotropics to the world's climate, biogeochemical cycling and biodiversity cannot be questioned. This book suggests that gradients are key to understanding both these issues and Neotropical ecosystem structure, function and dynamics in general. Those gradients are either spatial, temporal or spatio-temporal, where many temporal and spatio-temporal gradients are initiated by disturbances (e.g., tree-fall, landslide, cultivation). And in particular for the Neotropics, three large spatial gradients - latitude, longitude, altitude (elevation) - are of critical importance. The editor has over 30 years of experience investigating Neotropical gradients in Costa Rica, Puerto Rico, Peru and Ecuador, and has published 5 previous books on different aspects of the Neotropics. Once again he has assembled top-shelf Neotropical scientists and researchers, here to focus on gradients: their nature, interactions and how they structure ecosystems.

The sixth annual guide to the environmental, economic and social trends which are shaping the future, this text presents the good news, the bad news, and a few surprises about the state of our planet. n Part One, facing pages of text and graphs provide information on 40 carefully selected indicators, mapping changes in food supplies; agriculture; the atmosphere, energy and transport; natural resources; the global economy; society and health; and the millitary. Part Two of the text contains special features on less celebrated trends, including ten new vital signs indicators such as violence against women, how the environment impacts on the insurance industry, and the proliferation of landmines.

This is a core textbook for courses on environmental issues taught in sociology or geography or environmental sciences departments.

Providing readers with the confidence needed to debate key issues in bioethics, this introductory text clearly explains bioethical theories and their philosophical foundations. Over 250 activities introduce topics for personal reflection, and discussion points encourage students to think for themselves and build their own arguments. Highlighting the potential pitfalls for those new to bioethics, each chapter features boxes providing factual information and outlining the philosophical background, along with detailed case studies that offer an insight into real-life examples of bioethical problems. Within-chapter essay questions and quizzes, along with end-of-chapter review questions, allow students to check their understanding and to broaden their thinking about the topics discussed. The accompanying podcasts by the author (two of whose podcasts on iTunesUTM have attracted over 3 million downloads) explain points that might be difficult for beginners. These, along with a range of extra resources for students and instructors, are available at www.cambridge.org/bioethics.

Encyclopedia of the World’s Biomes is a unique, five volume reference that provides a global synthesis of biomes, including the latest science. All of the book's chapters follow a common thematic order that spans biodiversity importance, principal anthropogenic stressors and trends, changing climatic conditions, and conservation strategies for maintaining biomes in an increasingly human-dominated world. This work is a one-stop shop that gives users access to up-to-date, informative articles that go deeper in content than any currently available publication. Offers students and researchers a one-stop shop for information currently only available in scattered or non-technical sources Authored and edited by top scientists in the field Concisely written to guide the reader though the topic Includes meaningful illustrations and suggests further reading for those needing more specific information