The word ‘aliens’ can be used in many ways, to invoke fear, dislike and fascination. For biologists it is used to indicate organisms that have been introduced by people to new territories. In the British Isles alien plants are common, conspicuous, pestiferous, beautiful, edible – and can be both useful and harmful.

A history of the most successful, significant and long-running natural history series in the world.

From the machair grasslands of the Outer Hebrides to the chalk cliffs of Kent, and from the dense pinewoods of Abernethy forest to the wetlands of the Fens of eastern England, Britain offers a richly varied array of habitats for our wild flowers. The distinguished science and natural history producer and filmmaker Steve Nicholls presents a visually stunning survey of Britain's best-loved wildflowers, illustrated with the his own beautiful photographs of flora in their habitat. Focusing on three broad habitats – grassland, open land and woodland – he offers a biologically rigorous but engagingly readable account of our wild flowers and the places that nourish them. He probes deep into the social and cultural history of wild flowers to tell a plethora of fascinating stories, from the 'daffodil trains' which transported Londoners to the 'golden triangle' in Gloucestershire to experience woodlands carpeted with wild daffodils, to the odd case of the Bath asparagus – which isn't an asparagus at all, but rather the edible flower buds of the rare spiked star of Bethlehem, which used to grow in abundance around Bath.

Trees are familiar components of many landscapes, vital to the healthy functioning of the global ecosystem and unparalled in the range of materials which they provide for human use. Yet how much do we really understand about how they work? This 2000 book provides a comprehensive introduction to the natural history of trees, presenting information on all aspects of tree biology and ecology in an easy to read and concise text. Fascinating insights into the workings of these everyday plants are uncovered throughout the book, with questions such as how are trees designed, how do they grow and reproduce, and why do they eventually die tackled in an illuminating way. Written for a non-technical audience, the book is nonetheless rigorous in its treatment and will therefore provide a valuable source of reference for beginning students as well as those with a less formal interest in this fascinating group of plants.

Invasive non-native species are a major threat to global biodiversity. Often introduced accidentally through international travel or trade, they invade and colonize new habitats, often with devastating consequences for the local flora and fauna. Their environmental impacts can range from damage to resource production (e.g. agriculture and forestry) and infrastructure (e.g. buildings, road and water supply), to human health. They consequently can have major economic impacts. It is a priority to prevent their introduction and spread, as well as to control them. Freshwater ecosystems are particularly at risk from invasions and are landscape corridors that facilitate the spread of invasives. This book reviews the current state of knowledge of the most notable global invasive freshwater species or groups, based on their severity of economic impact, geographic distribution outside of their native range, extent of research, and recognition of the ecological severity of the impact of the species by the IUCN. As well as some of the very well-known species, the book also covers some invasives that are emerging as serious threats. Examples covered include a range of aquatic and riparian plants, insects, molluscs, crustacea, fish, amphibians, reptiles and mammals, as well as some major pathogens of aquatic organisms. The book also includes overview chapters synthesizing the ecological impact of invasive species in fresh water and summarizing practical implications for the management of rivers and other freshwater habitats.

From the host of "Bill Nye the Science Guy" comes an impassioned explanation of how the science of our origins is fundamental to our understanding of the nature of science

Both fire and climatic variability have monumental impacts on the dynamics of temperate ecosystems. These impacts can sometimes be extreme or devastating as seen in recent El Nino/La Nina cycles and in uncontrolled fire occurrences. This volume brings together research conducted in western North and South America, areas of a great deal of collaborative work on the influence of people and climate change on fire regimes. In order to give perspective to patterns of change over time, it emphasizes the integration of paleoecological studies with studies of modern ecosystems. Data from a range of spatial scales, from individual plants to communities and ecosystems to landscape and regional levels, are included. Contributions come from fire ecology, paleoecology, biogeography, paleoclimatology, landscape and ecosystem ecology, ecological modeling, forest management, plant community ecology and plant morphology. The book gives a synthetic overview of methods, data and simulation models for evaluating fire regime processes in forests, shrublands and woodlands and assembles case studies of fire, climate and land use histories. The unique approach of this book gives researchers the benefits of a north-south comparison as well as the integration of paleoecological histories, current ecosystem dynamics and modeling of future changes.